GENTLE DENTAL SERVICE CORP
8-K, 1998-07-15
MISC HEALTH & ALLIED SERVICES, NEC
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                       SECURITIES AND EXCHANGE COMMISSION
                             Washington, D.C. 20549

                                    FORM 8-K


                Current Report Pursuant to Section 13 or 15(d) of
                       The Securities Exchange Act of 1934


         Date of Report (Date of earliest event reported) June 30, 1998


                        GENTLE DENTAL SERVICE CORPORATION
             (Exact name of registrant as specified in its charter)


        Washington                       000-23673               91-1577891
- -------------------------------         -----------          -------------------
(State or other jurisdiction of         (Commission            (IRS Employer
incorporation or organization)            File No.)          Identification No.)


222 North Sepulveda Boulevard, Suite 740, El Segundo, California       90245
- --------------------------------------------------------------------------------
(Address of principal executive offices)                             (Zip Code)


                                 (310) 765-2400
- --------------------------------------------------------------------------------
              (Registrant's telephone number, including area code)


                                    No Change
- --------------------------------------------------------------------------------
              (Former name, former address and former fiscal year,
                         if changed since last report)
<PAGE>
Item 2.  Acquisition or Disposition of Assets

     On June 30, 1998, Gentle Dental Service Corporation (the "Company")
completed the acquisition of certain assets of Pacific Dental Services, Inc.
("PDS"), consisting of all of the assets of PDS associated with 8 dental
practices managed by PDS or Orange Dental Services in Orange and Riverside
counties of California. The Company also acquired substantially all of the
assets of Orange Dental Services, a partnership of which PDS is the controlling
partner, which was the manager of one of the acquired practices. Lastly, the
acquisition included the purchase from Bryan Watanabe, D.D.S., Inc., the
professional corporation conducting one of the acquired practices ("Watanabe"),
of its rights under the previously existing management agreement between
Watanabe and PDS. In addition, the Company has entered into a definitive
agreement to acquire substantially all of the assets of TG3 Dental Services
("TG3"), which manages one additional dental practice in Riverside, California;
this acquisition is scheduled to close on October 31, 1998.

     The aggregate purchase price paid at closing on June 30, 1998 consisted of
$6,510,655 in cash, assumption of $866,330 in debt, and 182,425 shares of
Company Common Stock valued at $1,616,765. The purchase price to be paid at
closing for the assets of TG3 will consist of $840,000 in cash and 40,620 shares
of Company Common Stock valued at $360,000. In addition, the Company has agreed
to make cash and stock earnout payments as set forth in the agreements based on
the EBITDA of the acquired businesses for the first three years following the
closing. The cash paid at closing was obtained from the Company's existing cash
balances.

Item 7.  Financial Statements and Exhibits

     (a) Financial statements of businesses acquired.

         Audited Consolidated Balance Sheets of PDS as of December 31, 1996 and
         1997, and related audited Consolidated Statements of Operations,
         Stockholders' Equity and Cash Flows of PDS for the years ended December
         31, 1996 and 1997.

         Unaudited Consolidated Balance Sheets of PDS as of March 31, 1998, and
         related unaudited Consolidated Statements of Operations, Stockholders'
         Equity and Cash Flows of PDS for the three-month periods ended March
         31, 1997 and 1998.

         Audited Consolidated Balance Sheets of TG3 as of December 31, 1997, and
         related audited Consolidated Statements of Operations, Stockholders'
         Equity and Cash Flows of TG3 for the two-month period ended December
         31, 1997.

         Unaudited Consolidated Balance Sheets of TG3 as of March 31, 1998, and
         related unaudited Consolidated Statements of Operations, Stockholders'
         Equity and Cash Flows of TG3 for the three-month period ended March 31,
         1998.


                                        2
<PAGE>
         The foregoing financial statements are not included in this report and
         will be filed by amendment to this report on or before September 14,
         1998.

     (b) Pro forma financial information. Pro forma Balance Sheet as of March
         31, 1998 and pro forma Statements of Operations for the year ended
         December 31, 1997 and the three-month period ended March 31, 1998.

         The foregoing pro forma financial statements are not included in this
         report and will be filed by amendment to this report on or before
         September 14, 1998.

     (c) Exhibits.

         2.1  Asset Purchase Agreement, dated as of June 30, 1998, between the
              Company, Gentle Dental Management, Inc. and Pacific Dental
              Services, Inc.

         2.2  Asset Purchase Agreement, dated as of June 30, 1998, between the
              Company, Gentle Dental Management, Inc. and Orange Dental
              Services.

         2.3  Asset Purchase Agreement, dated as of June 30, 1998, between the
              Company, Gentle Dental Management, Inc. and TG3 Dental Services.

         2.4  Asset Purchase Agreement, dated as of June 30, 1998, between the
              Company, Gentle Dental Management, Inc. and Bryan Watanabe,
              D.D.S., Inc.


                                    SIGNATURE

     Pursuant to the requirements of the Securities Exchange Act of 1934, the
Registrant has duly caused this report to be signed on its behalf by the
undersigned hereunto duly authorized.

     Dated: July 15, 1998

                                       GENTLE DENTAL SERVICE CORPORATION



                                       By NORMAN R. HUFFAKER
                                          --------------------------------------
                                          Norman R. Huffaker,
                                          Chief Financial Officer


                                        3
<PAGE>
                                  EXHIBIT INDEX

Exhibit       Description
- -------       -----------

  2.1         Asset Purchase Agreement, dated as of June 30, 1998, between the
              Company, Gentle Dental Management, Inc. and Pacific Dental
              Services, Inc.

              The following exhibits and schedules to the Asset Purchase
              Agreement have been omitted and will be provided to the Securities
              and Exchange Commission upon request:

              Exhibit C                          Assumption Agreement
              Exhibit D                          Assignment and Bill of Sale
              Exhibit E                          Management Agreement
              Exhibit F                          Shares Acquisition Agreement
              Exhibit G                          Dentist Employment Agreement
              Exhibit H                          Agreement Regarding New Offices
              Exhibit I                          Employment Agreement
              Schedule 1.02-2                    Excluded Assets
              Schedule 1.10                      Purchase Price Allocation
              Schedule 3.04                      Litigation
              Schedule 3.06-2                    Employee Benefits
              Schedule 3.06-3                    Employment Manuals and Policies
              Schedule 3.06-4                    Compensation
              Schedule 3.07                      Financial Statements
              Schedule 3.08                      Receivables
              Schedule 3.09                      Prepaid Expenses and Other
              Schedule 3.10                      Tangible Personal Property
              Schedule 3.11                      Payables
              Schedule 3.12                      Indebtedness
              Schedule 3.13                      Other Liabilities
              Schedule 3.15                      Leases
              Schedule 3.16                      Contracts
              Schedule 3.19                      Insurance
              Schedule 3.22                      Permits
              Schedule 3.25                      Consents and Approvals

  2.2         Asset Purchase Agreement, dated as of June 30, 1998, between the
              Company, Gentle Dental Management, Inc. and Orange Dental
              Services.

              The following exhibits and schedules to the Asset Purchase
              Agreement have been omitted and will be provided to the Securities
              and Exchange Commission upon request:
<PAGE>
              Exhibit A                          Assumption Agreement
              Exhibit B                          Assignment and Bill of Sale
              Exhibit C                          Management Agreement
              Exhibit D                          Shares Acquisition Agreement
              Exhibit E                          Dentist Employment Agreement
              Schedule 1.02-2                    Excluded Assets
              Schedule 1.09                      Purchase Price Allocation
              Schedule 3.04                      Litigation
              Schedule 3.06-2                    Employee Benefits
              Schedule 3.06-3                    Employment Manuals and Policies
              Schedule 3.06-4                    Compensation
              Schedule 3.12                      Indebtedness
              Schedule 3.13                      Other Liabilities
              Schedule 3.15                      Leases
              Schedule 3.16                      Contracts
              Schedule 3.19                      Insurance
              Schedule 3.22                      Permits
              Schedule 3.25                      Consents and Approvals

  2.3         Asset Purchase Agreement, dated as of June 30, 1998, between the
              Company, Gentle Dental Management, Inc. and TG3 Dental Services.

              The following exhibits and schedules to the Asset Purchase
              Agreement have been omitted and will be provided to the Securities
              and Exchange Commission upon request:

              Exhibit A                          Assumption Agreement
              Exhibit B                          Assignment and Bill of Sale
              Exhibit C                          Management Agreement
              Exhibit D                          Shares Acquisition Agreement
              Exhibit E                          Dentist Employment Agreement
              Schedule 1.02-2                    Excluded Assets
              Schedule 1.10                      Purchase Price Allocation
              Schedule 3.04                      Litigation
              Schedule 3.06-2                    Employee Benefits
              Schedule 3.06-3                    Employment Manuals and Policies
              Schedule 3.06-4                    Compensation
              Schedule 3.07                      Financial Statements
              Schedule 3.08                      Receivables
              Schedule 3.09                      Prepaid Expenses and Other
              Schedule 3.10                      Tangible Personal Property
              Schedule 3.11                      Payables
              Schedule 3.12                      Indebtedness
              Schedule 3.13                      Other Liabilities
<PAGE>
              Schedule 3.15                      Leases
              Schedule 3.16                      Contracts
              Schedule 3.19                      Insurance
              Schedule 3.22                      Permits
              Schedule 3.25                      Consents and Approvals

  2.4         Asset Purchase Agreement, dated as of June 30, 1998, between the
              Company, Gentle Dental Management, Inc. and Bryan Watanabe,
              D.D.S., Inc.

              The following exhibits to the Asset Purchase Agreement have
              been omitted and will be provided to the Securities and
              Exchange Commission upon request:

              Exhibit A                          Assignment and Bill of Sale
              Exhibit B                          Management Agreement
              Exhibit C                          Shares Acquisition Agreement
              Exhibit D                          Dentist Employment Agreement

                            ASSET PURCHASE AGREEMENT

                                     between

                       GENTLE DENTAL SERVICE CORPORATION,

                         GENTLE DENTAL MANAGEMENT, INC.

                                       and

                          PACIFIC DENTAL SERVICES, INC.


                               Dated June 30, 1998
<PAGE>
                                TABLE OF CONTENTS

                                                                            Page

ARTICLE I - Purchase and Sale of Assets....................................... 2

     1.01   Purchase and Sale................................................. 2
     1.02   Excluded Assets................................................... 3
     1.03   Assumption of Liabilities......................................... 4
     1.04   Purchase Price.................................................... 4
     1.05   Purchase Price Adjustment......................................... 6
     1.06   Instruments of Conveyance and Transfer............................ 7
     1.07   Further Assurances................................................ 7
     1.08   Closing........................................................... 7
     1.09   Sales Tax......................................................... 7
     1.10   Allocation of Purchase Price...................................... 7

ARTICLE II - Representations and Warranties of GD Sub and GDSC................ 8

     2.01   Authorization..................................................... 8
     2.02   Capitalization.................................................... 8
     2.03   Compliance........................................................ 8
     2.04   Consents.......................................................... 9
     2.05   Accuracy of Representations & Warranties.......................... 9
     2.06   Rule 144.......................................................... 9

ARTICLE III - Representations and Warranties of PDS and Shareholders.......... 9

     3.01   Corporate Existence; Authority.................................... 9
     3.02   No Adverse Consequences...........................................10
     3.03   Brokers and Finders...............................................10
     3.04   Litigation........................................................11
     3.05   Compliance with Laws..............................................11
     3.06   Employment Matters................................................11
     3.07   Financial Statements..............................................12
     3.08   Receivables.......................................................13
     3.09   Prepaid Expenses and Other........................................13
     3.10   Personal Property.................................................13
     3.11   Payables..........................................................13
     3.12   Indebtedness......................................................13
     3.13   Other Liabilities.................................................13
     3.14   Absence of Certain Changes or Events..............................13
     3.15   Leases   .........................................................14
     3.16   Certain Contracts and Arrangements................................15
     3.17   Status of Contracts and Leases....................................15
     3.18   Title and Condition of Tangible Assets............................16
     3.19   Insurance.........................................................17
     3.20   Taxes    .........................................................17

                                        i
<PAGE>
                                                                            Page

     3.21   No Restrictions...................................................17
     3.22   Permits and Licenses..............................................18
     3.23   Certain Payments..................................................18
     3.24   Environmental Conditions..........................................18
     3.25   Consents and Approvals............................................18
     3.26   Records...........................................................19
     3.27   Investments Representations.......................................19
     3.28   Access to Information.............................................19
     3.29   Sophistication....................................................19
     3.30   Unanimous Consent.................................................20
     3.31   Reliance..........................................................20
     3.32   Accuracy of Representations and Warranties........................20

ARTICLE IV - Covenants of PDS and Shareholders................................20

     4.01   Access to Properties, Books and Records...........................20
     4.02   Negative Covenants................................................20
     4.03   Affirmative Covenants.............................................21
     4.04   No Negotiations With Others.......................................22
     4.05   Employees.........................................................22

ARTICLE V - Joint Covenants...................................................23

     5.01   Governmental Consents.............................................23
     5.02   Best Efforts; No Inconsistent Action..............................23

ARTICLE VI - Conditions to Obligations of GD Sub..............................23

     6.01   Governmental Approvals............................................23
     6.02   Consents..........................................................23
     6.03   Representations, Warranties and Covenants.........................24
     6.04   Adverse Proceedings...............................................24
     6.05   No Adverse Change.................................................24
     6.06   Management Agreement..............................................24
     6.07   Shares Acquisition Agreement......................................24
     6.08   Dentist Employment Agreements.....................................24
     6.09   Closing and Signing of Related Transactions.......................24
     6.10   Agreement Regarding New Offices...................................25
     6.11   Employment Agreement..............................................25
     6.12   Checks from TN Dental Services and TG3 Dental Services............25
     6.13   Actions Satisfactory to GD Sub's Counsel..........................25

                                       ii
<PAGE>
                                                                            Page

ARTICLE VII - Conditions to Obligations of PDS................................25

     7.01   Representations, Warranties and Covenants.........................25
     7.02   Adverse Proceedings...............................................26
     7.03   Stock Price.......................................................26
     7.04   Agreement Regarding New Offices...................................26
     7.05   Employment Agreement..............................................26


ARTICLE VIII - Termination....................................................26

     8.01   Right of Parties to Terminate.....................................26
     8.02   Effect of Termination.............................................26

ARTICLE IX - Survival; Indemnification........................................27

     9.01   Survival..........................................................27
     9.02   Indemnification by PDS and Shareholders...........................27
     9.03   Indemnification by GD Sub.........................................28
     9.04   Indemnification Procedure.........................................28
     9.05   Right of Offset...................................................30
     9.06   Rights Not Exclusive..............................................30

ARTICLE X - Confidentiality; Press Releases...................................30

     10.1   Confidentiality...................................................30
     10.2   Press Releases....................................................31

ARTICLE XI - Other Provisions.................................................31

     11.01  Benefit and Assignment............................................31
     11.02  Entire Agreement..................................................31
     11.03  Fees and Expenses.................................................31
     11.04  Amendment, Waiver, etc............................................32
     11.05  Headings..........................................................32
     11.06  Governing Law.....................................................32
     11.07  Notices...........................................................33
     11.08  Breach; Equitable Relief..........................................33
     11.09  Attorneys' Fees...................................................33
     11.10  Guarantee.........................................................33
     11.11  Counterparts......................................................33

                                       iii
<PAGE>
                             INDEX OF DEFINED TERMS


Term                                                    Location of Definition
- ----                                                    ----------------------

1933 Act................................................2.06
Adjusted Stock Consideration Amount.....................1.04-2
Admin Charge............................................1.04-4
Administrative Office...................................Introduction
Assets..................................................1.01
Assumed Liabilities.....................................1.04-3
Cash Consideration......................................1.04-1
Closing.................................................1.08
Closing Date............................................1.08
Code....................................................3.06-2
Contracts...............................................1.01-6
Current Balance Sheets..................................3.07-1
DDS.....................................................6.09
Damages.................................................9.02-1
Dental Practices........................................Introduction
Earnout Consideration...................................1.04-4
Earnout Period..........................................1.04-4
EBITDA..................................................1.04-4
ERISA...................................................3.06-2
ERISA Plans.............................................3.06-2
Environmental Law.......................................3.24-2(a)
Excess Cap-ex Charge....................................1.04-4
Financial Statements....................................3.07-1
GD Sub..................................................Introduction
GD Sub's Indemnified Persons............................9.02-1
GDSC....................................................Introduction
GDSC Common Stock.......................................1.04-2
Hazardous Substance.....................................3.24-2(b)
Leases..................................................1.01-5
Material Adverse Change.................................Article III Introduction
Material Adverse Effect.................................Article III Introduction
Net Current Assets......................................1.05-3
PDS.....................................................Introduction
PDS Management Agreements...............................Introduction
PDS Assignable Option Agreements .......................Introduction
PDS's Indemnified Persons...............................9.03-1
Permits.................................................3.22
Policies................................................3.19

                                       iv
<PAGE>
Prevailing Party........................................11.09
Professional Corporations...............................Introduction
Purchase Price..........................................1.04
Purchase Price Adjustment...............................1.05-1
Real Property...........................................3.15
Registration Statement..................................2.02
Related Documents.......................................9.01
Returns.................................................3.20-1
Shares..................................................2.06
Shareholders............................................Introduction
Stock Consideration Amount..............................1.04-2
Stock Price.............................................1.04-2
Tangible Personal Property..............................3.10
Taxes...................................................3.20-3
Third Party Claims......................................9.04-1(a)

                                        v
<PAGE>
                                LIST OF EXHIBITS

Exhibit                   Item                                   First Reference
- -------                   ----                                   ---------------


   A             Dental Practices                                Introduction
   B             Professional Corporations                       Introduction
   C             Assumption Agreement                            1.04-3
   D             Assignment and Bill of Sale                     1.06
   E             Management Agreement                            6.06
   F             Shares Acquisition Agreement                    6.07
   G             Dentist Employment Agreement                    6.08
   H             Agreement Regarding New Offices                 6.10
   I             Employment Agreement                            6.11



                                LIST OF SCHEDULES


Schedule                 Content
- --------                 -------

1.02-2                   Excluded Assets
1.10                     Purchase Price Allocation
3.04                     Litigation
3.06-2                   Employee Benefits
3.06-3                   Employment Manuals and Policies
3.06-4                   Compensation
3.07                     Financial Statements
3.08                     Receivables
3.09                     Prepaid Expenses and Other
3.10                     Tangible Personal Property
3.11                     Payables
3.12                     Indebtedness
3.13                     Other Liabilities
3.15                     Leases
3.16                     Contracts
3.19                     Insurance
3.22                     Permits
3.25                     Consents and Approvals

                                       vi
<PAGE>
                            ASSET PURCHASE AGREEMENT


DATED:     June 30, 1998


BETWEEN:   GENTLE DENTAL SERVICE CORPORATION,
             a Washington corporation
           900 Washington Street, Suite 1100
           Vancouver, WA  98660
           Telecopy No.:  (360) 750-8667                                  "GDSC"


           GENTLE DENTAL MANAGEMENT, INC.
             a Delaware  corporation
           900 Washington  Street,  Suite 1100
           Vancouver, WA 98660
           Telecopy No.:  (360) 750-8667                                "GD Sub"


AND:       PACIFIC DENTAL SERVICES, INC.
           129 West Wilson Street, Suite 200
           Costa Mesa, CA 92627
           Telecopy No.: (714) 646-1659                                    "PDS"


AND:       Stephen E. Thorne IV, Carolyn G. Ghazal, D.D.S.,
           Jeffrey A. Neal, D.D.S., Raymond Choi, D.D.S.,
           Charles Rodgers, D.D.S., Steven Darmstadt, D.D.S., M.S.,
           Jon Thorne, and David Bryant                           "Shareholders"


     Shareholders are the owners of all of the issued and outstanding capital
stock of PDS. The administrative office of PDS is located at the address listed
above (the "Administrative Office"). PDS provides management services to the
seven dental practices located at the addresses listed on Exhibit A attached
hereto (collectively, the "Dental Practices"). The seven Dental Practices are
conducted by the six professional corporations listed on Exhibit B attached
hereto (collectively, the "Professional Corporations"). PDS is party to a
management agreement with each Professional Corporation (collectively, the "PDS
Management Agreements"), and to an assignable option agreement with each
Professional Corporation and its sole shareholder (collectively, the "PDS
Assignable Option Agreements"). PDS desires to sell, and GD Sub desires to
purchase, substantially all of the assets associated with the Dental Practices
and the Administrative Office on the terms and conditions set forth in this
Agreement. Concurrent with this Agreement, GD Sub is entering into an Asset
Purchase Agreement with Orange Dental Services pursuant to which on the Closing
Date GD Sub will purchase all of the assets owned by Orange Dental Services and
associated with the dental practice located at 293

<PAGE>
Main Street, Suite 210, Orange, California (the "Orange Dental Practice").
Concurrent with this Agreement, GD Sub is also entering into an Asset Purchase
Agreement with TG3 Dental Services pursuant to which on October 31, 1998 GD Sub
will purchase all of the assets owned by TG3 Dental Services and associated with
the dental practice located at 3630 Central Ave., Suite 1, Riverside, California
92506 (the "Riverside 2 Dental Practice"). PDS receives management fees from TG3
Dental Services and Orange Dental Services for providing certain management
services to the Riverside 2 Dental Practice and the Orange Dental Practice. PDS
also desires to sell, and GD Sub desires to purchase, any assets owned by PDS
and associated with the Riverside 2 Dental Practice and the Orange Dental
Practice, including all rights to provide management services and receive
management fees therefor.

     In consideration of the mutual promises and covenants contained in this
Agreement, the parties agree as follows:


                                    ARTICLE I

                           Purchase and Sale of Assets

     1.01 Purchase and Sale. Subject to all the terms and conditions of this
Agreement and for the consideration herein stated, on the "Closing Date," as
that term is defined in Section 1.08 (provided that the transfer of assets
associated with the Riverside 2 Dental Practice shall occur on October 31, 1998
subject to and effective upon the closing of the purchase from TG3 Dental
Services), PDS agrees to sell, convey, assign, transfer and deliver to GD Sub,
and GD Sub agrees to purchase and accept from PDS, all of the assets, properties
and rights of PDS (other than the assets specified in Section 1.02), tangible
and intangible, wherever located, that are used or useful to maintain and
operate the Dental Practices, the Administrative Office, the Riverside 2 Dental
Practice and the Orange Dental Practice, which assets (the "Assets") shall
include without limitation:

          1.01-1 All patient lists, operating data and records relating to the
Dental Practices, including without limitation financial, accounting and credit
records, correspondence, budgets, engineering and facility records and other
similar documents and records;

          1.01-2 All other items of tangible personal property of PDS used in
connection with or associated with the Dental Practices and the Administrative
Office, including furniture, fixtures, equipment, supplies, inventory and spare
and replacement items therefor, including without limitation all such items
listed on Schedule 3.10 and all such items acquired by PDS after the date hereof
and on or before the Closing Date, other than to the extent such items are
disposed of by PDS prior to the Closing Date without breach of this Agreement;

          1.01-3 All accounts receivable and other receivables of PDS associated
with the Dental Practices, including without limitation all receivables listed
on Schedule 3.08 and all receivables generated after March 31, 1998 and on or
before the Closing Date, other than to the extent such receivables have been
collected by PDS prior to the Closing Date;

                                        2
<PAGE>
          1.01-4 All prepaid and deferred items of PDS relating to the Dental
Practices, including prepaid rent, insurance, taxes and unbilled charges and
deposits, including without limitation all such items listed on Schedule 3.09;

          1.01-5 All leases of real or personal property to which PDS is a party
as lessee and which relate to the Dental Practices, including without limitation
all leases listed on Schedule 3.10 and Schedule 3.15 and all leases entered into
after the date hereof and on or before the Closing Date and expressly assumed by
GD Sub in writing on the Closing Date as provided in Section 1.04-3(d), other
than to the extent such leases have terminated, expired or been disposed of by
PDS prior to the Closing Date without breach of this Agreement (collectively,
the "Leases");

          1.01-6 All rights, benefits and interests of PDS under the contracts,
agreements, commitments, understandings, purchase orders, documents and
instruments listed on Schedule 3.16 hereto, specifically including the PDS
Management Agreements and the PDS Assignable Option Agreements, and under any
contracts, agreements, commitments, understandings, purchase orders, documents
or instruments entered into between the date hereof and the Closing Date and
expressly assumed by GD Sub in writing on the Closing Date as provided in
Section 1.04-3(d), other than to the extent such items have terminated, expired
or been disposed of by PDS prior to the Closing Date without breach of this
Agreement (collectively, the "Contracts");

          1.01-7 All assignable rights to all telephone lines and numbers used
in the conduct of the Dental Practices, excluding any rights to telephone lines
and numbers specifically associated with the Administrative Office;

          1.01-8 All right, title and interest in and to trade names associated
with the Dental Practices; and

          1.01-9 All of the assets, properties and rights of PDS, tangible and
intangible, that are used in, located at or associated with the Riverside 2
Dental Practice and the Orange Dental Practice, including without limitation all
rights to provide management services and receive management fees therefor.

     1.02 Excluded Assets. The Assets shall not include the following:

          1.02-1 Any lease not listed on Schedule 3.10 or Schedule 3.15 and any
contract, agreement, commitment, understanding, purchase order, document or
instrument not listed on Schedule 3.16, unless pursuant to Section 1.04-3(d) GD
Sub expressly agrees in writing on the Closing Date to assume the obligations
under such lease, contract, agreement, commitment, understanding, purchase
order, document or instrument, in which case PDS shall assign its rights and
benefits thereunder to GD Sub and the same shall be treated as a "Lease" or
"Contract" for purposes of this Agreement;

          1.02-2 The assets identified on Schedule 1.02-2;

          1.02-3 The lease of the Administrative Office and any related
leasehold improvements; and

                                        3
<PAGE>
          1.02-4 Any assets specifically associated with any dental practices to
which PDS provides management services other than the Dental Practices, the
Riverside 2 Dental Practice and the Orange Dental Practice.

     1.03 Assumption of Liabilities. Except for the liabilities and obligations
to be assumed by GD Sub pursuant to Section 1.04-3, GD Sub will not assume and
will not be liable for any liabilities of PDS, known or unknown, contingent or
absolute, accrued or other, and the Assets shall be free of all liabilities,
obligations, liens and encumbrances. Without limiting the generality of the
foregoing and except as otherwise provided above, GD Sub will not be responsible
for any of the following:

          1.03-1 Liabilities, obligations or debts of PDS, whether fixed,
contingent or mixed and whether based on events occurring before or after the
Closing Date, including without limitation those based on tort, contract,
statutory or other claims or involving fines or penalties payable to any
governmental authority;

          1.03-2 Liabilities, obligations or debts of PDS for any federal, state
or local tax, including without limitation federal income taxes, state income
and excise taxes, state and local real and personal property taxes and federal,
state and local withholding and payroll taxes;

          1.03-3 Liabilities or obligations of PDS to employees for salaries,
bonuses or health and welfare benefits or with respect to any profit sharing,
stock bonus, pension, retirement, stock purchase, option, bonus or deferred
compensation plan or for any other benefits or compensation (including without
limitation accrued vacation or sick leave); and

          1.03-4 Liabilities or obligations of PDS for employee severance
payments or arrangements resulting from termination of PDS's employees.

     1.04 Purchase Price. The purchase price for the Assets (the "Purchase
Price") shall be the following:

          1.04-1 $5,607,826 (the "Cash Consideration") payable by check on the
Closing Date with $4,878,713 of such amount payable by check to PDS and $729,113
of such amount payable by check to various lenders as listed under the heading
"debt to be paid off" on Schedule 3.12.

          1.04-2 A number of shares of GDSC's Common Stock ("GDSC Common Stock")
determined by dividing the Adjusted Stock Consideration Amount (as defined
below) by a number (the "Stock Price") equal to the average of the closing
prices of GDSC Common Stock reported by NASDAQ for the five trading days prior
to the date of this Agreement. The "Stock Consideration Amount" equals
$2,347,242. The "Adjusted Stock Consideration Amount" shall equal the Stock
Consideration Amount reduced by the principal amount of any debt or capital
lease obligations of PDS assumed by GD Sub. The shares of GDSC Common Stock to
be delivered under this Agreement shall be issued by GDSC to GD Sub for transfer
by GD Sub to PDS.

          1.04-3 The assumption by GD Sub on the Closing Date (provided that the
assumption of liabilities associated with the Riverside 2 Dental Practice shall
occur on October 31, 1998 subject

                                        4
<PAGE>
to and effective upon the closing of the purchase from TG3 Dental Services),
pursuant to the terms of an Assumption Agreement in substantially the form
attached hereto as Exhibit C, of the following liabilities of PDS (the "Assumed
Liabilities"):

               1.04-3(a) the accounts payable and accrued liabilities of PDS
associated with the Dental Practices, the Administrative Office, the Riverside 2
Dental Practice and the Orange Dental Practice, excluding accrued rent for the
Administrative Office and any other payables or liabilities specifically
associated with any other dental practices managed by PDS or any partnership of
which PDS is a partner, to the extent and in the amounts identified on Schedule
3.11 (to the extent such liabilities are not paid or discharged prior to the
Closing Date);

               1.04-3(b) all liabilities of PDS associated with the Dental
Practices and the Administrative Office, the Riverside 2 Dental Practice and the
Orange Dental Practice, excluding accrued rent for the Administrative Office and
any other payables or liabilities specifically associated with any other dental
practices managed by PDS or any partnership of which PDS is a partner, of a type
identified on Schedule 3.11 and incurred in the ordinary course of business
after March 31, 1998 and on or before the Closing Date (to the extent such
liabilities are not paid or discharged prior to the Closing Date), but
specifically excluding any liabilities for brokers' and attorneys' fees and
other expenses of this transaction and accrued liabilities for taxes based on
the income or revenues of PDS;

               1.04-3(c) all obligations of PDS under any of the Leases or
Contracts listed on Schedule 3.10, Schedule 3.15 or Schedule 3.16 hereto or
under any of the items listed under the heading "debt to be assumed" on Schedule
3.12; and

               1.04-3(d) all obligations of PDS under any lease, contract,
agreement, commitment, understanding, purchase order, document or instrument
entered into by PDS between the date of this Agreement and the Closing Date that
GD Sub, in its sole discretion, elects on the Closing Date to assume.

          1.04-4 Additional payments (the "Earnout Consideration") to be paid
based on the EBITDA (as defined below) and the Orange EBITDA (as defined below)
for the 36-month period (the "Earnout Period") beginning on the first day of the
first calendar month following the Closing Date. The first payment of Earnout
Consideration shall equal (a) $20,000, plus (b) 4.48 multiplied by the EBITDA
for the first 12 months of the Earnout Period, reduced by (c) the sum of
$305,000 plus the Cash Consideration and the Stock Consideration Amount. The
first payment of Earnout Consideration shall also include the amount equal to
(a) 4.48 multiplied by the Orange EBITDA for the first 12 months of the Earnout
Period, reduced by (b) the sum of the Orange Cash Consideration Amount (as
defined below) and the Orange Earnout Consideration (as defined below). The
second payment of Earnout Consideration shall equal (a) .96 multiplied by the
EBITDA for the second 12 months of the Earnout Period, plus (b) .06 multiplied
by the Orange EBITDA for the second 12 months of the Earnout Period, reduced by
(c) 80% of the earnout consideration, if any, paid by GD Sub under the terms of
the Asset Purchase Agreement dated June 30, 1998 between GDSC, GD Sub and Bryan
Watanabe D.D.S., Inc. The third payment of Earnout Consideration shall equal (a)
 .96 multiplied by the EBITDA for the third 12 months of the Earnout Period, plus
(b) .06 multiplied by the Orange EBITDA for the third 12 months of the Earnout
Period. The "EBITDA" shall mean the combined net

                                        5
<PAGE>
income of (a) the Professional Corporations and (b) GD Sub from the provision of
services to the Professional Corporations, before any reduction for interest,
income taxes, depreciation or amortization, and excluding any allocation of GD
Sub corporate overhead expense, but after the Excess Cap-ex Charge (as defined
below) and the Admin Charge (as defined below), as reflected on a combined
income statement for the practice locations prepared in conformity with
generally accepted accounting principles applied in a manner consistent with the
application of such principles to the preparation of GD Sub's audited financial
statements. The "Excess Cap-ex Charge" shall be an annual charge equal to 25% of
the total accumulated capital expenditures by GD Sub at the Dental Practices
after the Closing Date which in any 12-month period exceeds 2% of the combined
net revenue of the Dental Practices for such period. The "Admin Charge" shall
equal a pro rata portion of the sum of (a) rent reimbursed by GD Sub to PDS for
the Administrative Office, and (b) all unreimbursed costs incurred by GD Sub at
the Administrative Office, including but not limited to employee compensation
and benefits, based on the ratio of the combined net revenue of the Dental
Practices to the combined net revenue of all dental practices managed by GD Sub
from the Administrative Office for the relevant period. Eighty percent of the
first payment of Earnout Consideration shall be paid by check. The "Orange
EBITDA", the "Orange Cash Consideration Amount" and the "Orange Earnout
Consideration" shall have the meanings ascribed to the terms "EBITDA", "Cash
Consideration Amount" and "Earnout Consideration", respectively, in the Asset
Purchase Agreement dated June 30, 1998 by and among GDSC, GD Sub, Orange Dental
Services and the partners of Orange Dental Services. The remaining 20% of the
first payment of Earnout Consideration shall be paid in shares of GDSC Common
Stock. To determine the number of shares of GDSC Common Stock to be issued as
part of the first payment of Earnout Consideration, a share of GDSC Common Stock
shall be valued at the average of the closing prices of GDSC Common Stock
reported by NASDAQ for the five trading days prior to the 60th day after the end
of the first 12 months of the Earnout Period. All of the second and third
payments of Earnout Consideration shall be paid by check. The calculation and
payment of each payment of Earnout Consideration shall be completed within 90
days of the completion of the applicable 12-month portion of the Earnout Period.

     1.05 Purchase Price Adjustment. The Cash Consideration may be subject to
adjustment after Closing as set forth in this Section 1.05.

          1.05-1 As soon as reasonably possible after Closing, the amount of the
"Net Current Assets" (as defined in Section 1.05-3) shall be determined as
provided in Section 1.05-4. If the amount of Net Current Assets is $55,000 more
or less than $365,000, the Cash Consideration shall be adjusted by the full
amount of the difference (the "Purchase Price Adjustment"). If the difference
between Net Current Assets and $365,000 does not exceed $55,000, there shall be
no Purchase Price Adjustment.

          1.05-2 If the Net Current Assets are greater than $420,000, the
Purchase Price Adjustment shall be paid to PDS by check within 10 days after PDS
delivers the certificate described in Section 1.05-4. If the Net Current Assets
are less than $310,000, the Purchase Price Adjustment shall be paid by PDS to GD
Sub by check within 10 days after PDS delivers the certificate described in
Section 1.05-4.

                                        6
<PAGE>
          1.05-3 "Net Current Assets" means the sum of (a) accounts receivable
of PDS and Orange Dental Services associated with the Dental Practices and the
Orange Dental Practice, net of contractual allowances and bad debt reserve, at
the Closing Date and (b) any prepaid expenses of PDS and Orange Dental Services
relating to the Dental Practices and the Orange Dental Practice properly
recordable on a balance sheet of PDS as of the Closing Date reduced by the sum
of (x) the accounts payable of PDS and Orange Dental Services associated with
the Dental Practices and the Administrative Office and the Orange Dental
Practice at the Closing Date and (y) the accrued liabilities of PDS and Orange
Dental Services associated with the Dental Practices and the Administrative
Office and the Orange Dental Practice, at the Closing Date, specifically
including an accrual of payroll and payroll-related charges up to and including
the Closing Date, but only to the extent such payables and liabilities are
assumed by GD Sub, all as determined consistently with the accounting
conventions applied in determining the amounts set forth in paragraphs 1.05-1
and 1.05-2 above.

          1.05-4 At or after the Closing Date, PDS shall execute and deliver to
GD Sub a certificate detailing the calculation of Net Current Assets and
including as schedules thereto lists of all receivables, prepaid expenses,
payables and accrued liabilities as of the Closing Date included in the
calculation. In this certificate, PDS shall certify the accuracy and
completeness of the schedules to the certificate and the accuracy of the
calculation of Net Current Assets.

     1.06 Instruments of Conveyance and Transfer. The sale of the Assets, and
the conveyance, assignment, transfer and delivery of all of the Assets shall be
effected by PDS's execution and delivery to GD Sub, on the Closing Date, of a
bill of sale in substantially the form of the Assignment and Bill of Sale
attached hereto as Exhibit D.

     1.07 Further Assurances. PDS and Shareholders agree that, at any time and
from time to time on and after the Closing Date, they will, upon the request of
GD Sub and without further consideration, take all steps reasonably necessary to
place GD Sub in possession and operating control of the Assets and will do,
execute, acknowledge and deliver, or will cause to be done, executed,
acknowledged and delivered, all further acts, deeds, assignments, conveyances,
transfers, powers of attorney or assurances as reasonably required to sell,
assign, convey, transfer, grant, assure and confirm to GD Sub, or to aid and
assist in the collection of or reducing to possession by GD Sub of, all of the
Assets, or to vest in GD Sub good, valid and marketable title to the Assets.

     1.08 Closing. The consummation of the transactions contemplated by this
Agreement (the "Closing") shall take place at the offices of Stoel Rives LLP,
900 SW Fifth Avenue, Suite 2300, Portland, Oregon, at 10:00 a.m., Pacific time,
on June 30, 1998 or at another date, time and place agreed upon in writing by
the parties (the "Closing Date").

     1.09 Sales Tax. PDS shall pay any sales tax owing in respect of the
purchase of the Assets. PDS shall promptly file all necessary sales tax returns,
if any, and pay all sales taxes due, if any, following the Closing Date.

     1.10 Allocation of Purchase Price. The Purchase Price shall be allocated
among the Assets in accordance with Schedule 1.10, and GDSC and PDS shall be
bound by that allocation in reporting

                                        7
<PAGE>
the transactions contemplated by this Agreement to any governmental authority
(including without limitation the Internal Revenue Service).


                                   ARTICLE II

                Representations and Warranties of GD Sub and GDSC

     GD Sub and GDSC, jointly and severally, represent and warrant to PDS as
follows:

     2.01 Authorization. Each of GD Sub and GDSC is a corporation duly
organized, validly existing and in good standing under the laws of the state of
its incorporation, with all requisite corporate power and authority to own and
operate its properties and to carry on its business as now conducted. Each of GD
Sub and GDSC has taken all corporate action necessary to authorize its
execution, delivery and performance of this Agreement. Each of GD Sub and GDSC
has full corporate power and authority to enter into this Agreement and carry
out the terms hereof. This Agreement has been duly executed and delivered by GD
Sub and GDSC and is binding upon and enforceable against each of them in
accordance with its terms, except as enforceability may be limited or affected
by applicable bankruptcy, insolvency, reorganization, or other laws of general
application relating to or affecting creditors' rights generally and except as
enforceability may be limited by rules of law governing specific performance,
injunctive relief or other equitable remedies.

     2.02 Capitalization. The authorized capital stock of GDSC consists of
50,000,000 shares of Common Stock, of which 7,994,213 shares are issued and
outstanding, and 30,000,000 shares of Preferred Stock, of which 1,628,863 shares
are issued and outstanding. All issued and outstanding shares of GDSC capital
stock are validly issued, fully paid and nonassessable, and have been issued
without violation of any preemptive rights. There is no subscription, option,
warrant, call, right, agreement or commitment (including any right of conversion
or exchange under any outstanding security or other instrument) relating to the
issuance by GDSC of GDSC capital stock other than outstanding options under the
GDSC 1993 Stock Incentive Plan, outstanding purchase rights under the GDSC
Employee Stock Purchase Plan and the GDSC Professional Corporation Employee
Stock Purchase Plan, other options and warrants described in GDSC's Registration
Statement on Form SB-2, Registration No. 333-44037 (the "Registration
Statement"), the proposed public offering of Common Stock described in the
Registration Statement, the issuance of convertible debt and preferred stock
announced by GDSC on May 12, 1998, and outstanding offers and/or agreements to
acquire other dental practices or dental practice management companies in
exchange for Common Stock. The GDSC Common Stock to be issued under this
Agreement will, when issued, be duly and validly authorized and issued, fully
paid and nonassessable.

     2.03 Compliance. The execution, delivery and performance of this Agreement
by GD Sub and GDSC, the compliance by GD Sub and GDSC with the provisions of
this Agreement and the consummation of the transactions described in this
Agreement will not conflict with or result in the breach of any of the terms or
provisions of or constitute a default under:

          2.03-1 the respective articles of incorporation or bylaws of GD Sub
and GDSC;

                                        8
<PAGE>
          2.03-2 any note, indenture, mortgage, deed of trust, loan agreement,
lease or other agreement or instrument to which GD Sub or GDSC is a party or by
which GD Sub or GDSC is bound; or

          2.03-3 any statute or any order, rule, regulation or decision of any
court or regulatory authority or governmental body applicable to GD Sub or GDSC.

     2.04 Consents. No consent, approval, authorization, order, designation or
declaration of any court or regulatory authority or governmental body, federal
or other, or third person is required to be obtained by GD Sub or GDSC for the
consummation of the transactions described in this Agreement.

     2.05 Accuracy of Representations & Warranties. None of the representations
or warranties of GD Sub or GDSC contains or will contain any untrue statement of
any material fact or omits or misstates a material fact necessary to make the
statements contained in this Agreement not misleading. Neither GD Sub nor GDSC
knows of any fact that has resulted or that, in the reasonable judgement of GD
Sub or GDSC will result, in any material adverse change in the business, results
of operation, financial condition or prospects of GD Sub or GDSC that has not
been set forth in this Agreement or in GDSC's filings with the Securities and
Exchange Commission.

     2.06 Rule 144. With a view to making available to PDS the benefits of Rule
144 promulgated under the Securities Act of 1933 (the "1933 Act"), GDSC agrees,
during the one-year period starting on the first anniversary of the Closing Date
or such longer period as the public resale of the shares of GDSC Common Stock
issued under this Agreement ("Shares") by a nonaffiliate of GDSC is subject to
Rule 144, to file with the Securities and Exchange Commission in a timely manner
all reports and other documents required of GDSC under the Securities Exchange
Act of 1934. GDSC agrees to remove the legend described in the last sentence of
Section 3.27 from the certificates representing the Shares, upon request of the
holder, at any time after the second anniversary of the Closing Date or such
other time as the Shares may be freely sold by the holder without restriction
under Rule 144.


                                   ARTICLE III

             Representations and Warranties of PDS and Shareholders

     As used in this Agreement, "Material Adverse Effect" means a material
adverse effect on the business, results of operations, financial position,
assets or prospects of PDS, the Dental Practices or any of them which shall in
any event include any adverse effect on the assets, revenue or net income of PDS
in excess of $50,000; and "Material Adverse Change" means any change that has
resulted, will result or is likely to result in a Material Adverse Effect. PDS
and Shareholders represent and warrant to GD Sub as follows:

     3.01 Corporate Existence; Authority. PDS is a corporation duly organized,
validly existing and in good standing under the laws of the State of California,
and PDS has all necessary

                                        9
<PAGE>
corporate power and authority to own, lease and operate its properties and
assets and to carry on its business as now conducted and as proposed to be
conducted. Subject to Section 9.02-3, each Professional Corporation is a
professional corporation duly organized, validly existing and in good standing
under the laws of the State of California, and each Professional Corporation has
all necessary corporate power and authority to own, lease and operate its
properties and assets and to carry on its business as now conducted and as
proposed to be conducted. Shareholders own all of the issued and outstanding
stock of PDS. There is no subscription, option, warrant, call, right, agreement
or commitment (including any right of conversion or exchange under any
outstanding security or other instrument) relating to the issuance by PDS of PDS
capital stock. PDS has full power and authority to enter into this Agreement and
to carry out its terms. Upon execution of this Agreement by all Shareholders,
PDS will have taken all corporate action necessary to authorize the execution,
delivery and performance of this Agreement. This Agreement has been duly and
validly executed and delivered by PDS and Shareholders and is binding upon and
enforceable against PDS and Shareholders in accordance with its terms, except as
enforceability may be limited or affected by applicable bankruptcy, insolvency,
reorganization or other laws of general application relating to or affecting the
rights of creditors and except as enforceability may be limited by rules of law
governing specific performance, injunctive relief or other equitable remedies.

     3.02 No Adverse Consequences. Neither the execution and delivery of this
Agreement by PDS or Shareholders nor the consummation of the transactions
contemplated by this Agreement will

          3.02-1 result in the creation or imposition of any lien, charge or
encumbrance on any of PDS's or the Professional Corporations' assets or
properties,

          3.02-2 violate or conflict with any provision of PDS's articles of
incorporation or bylaws,

          3.02-3 violate any law, judgment, order, injunction, decree, rule,
regulation or ruling of any governmental authority applicable to PDS,
Shareholders, the Professional Corporations or any of them, assuming that the
agreements to be entered into between GD Sub and the Professional Corporations
do not violate applicable laws, or

          3.02-4 either alone or with the giving of notice or the passage of
time or both, conflict with, constitute grounds for termination or acceleration
of, result in the breach of the terms, conditions or provisions of, result in
the loss of any benefit to PDS or the Professional Corporations under or
constitute a default under any agreement, instrument, license or permit to which
PDS, any Shareholder or any Professional Corporation is a party or by which any
of them is bound, assuming that the agreements to be entered into between GD Sub
and the Professional Corporations do not violate applicable laws.

     3.03 Brokers and Finders. Neither PDS nor any Shareholder has employed any
broker, finder or agent or dealt with anyone purporting to act in such capacity
or agreed to pay any brokerage fee, finder's fee or commission with respect to
the transaction contemplated by this Agreement.

                                       10
<PAGE>
     3.04 Litigation. Except as set forth on Schedule 3.04, there is no claim,
litigation, proceeding or investigation of any kind pending or threatened by or
against PDS, or any Professional Corporation and, to the best knowledge of PDS,
there is no basis for any such claim, litigation, proceeding or investigation.

     3.05 Compliance with Laws. Except as set forth on Schedule 3.22 and subject
to Section 9.02-3, PDS and the Professional Corporations have at all relevant
times conducted their businesses in compliance with their respective articles of
incorporation and bylaws and all applicable laws and regulations. Except as set
forth on Schedule 3.22 and subject to Section 9.02-3, PDS and the Professional
Corporations are not in violation of any applicable laws or regulations, other
than violations which singly or in the aggregate do not, and, with the passage
of time will not, have a Material Adverse Effect. Subject to Section 9.02-3,
neither PDS nor any Professional Corporation is subject to any outstanding
order, writ, injunction or decree, and neither PDS nor any Professional
Corporation has been charged with, or threatened with a charge of, a violation
of any provision of federal, state or local law or regulation.

     3.06 Employment Matters.

          3.06-1 Labor Matters

               (a) Neither PDS nor any Professional Corporation is a party or
otherwise subject to any collective bargaining or other agreement governing the
wages, hours or terms of employment of its employees. PDS and the Professional
Corporations are and have been in compliance with all applicable laws regarding
employment and employment practices, terms and conditions of employment, wages
and hours and are not and have not been engaged in any unfair labor practice.

               (b) There is no (1) unfair labor practice complaint against PDS
or any Professional Corporation pending before the National Labor Relations
Board or any other governmental authority, (2) labor strike, slowdown or work
stoppage actually occurring or, to the best of the knowledge of PDS threatened
against any of them, (3) representation petition respecting any of their
employees pending before the National Labor Relations Board, or (4) grievance or
any arbitration proceeding pending arising out of or under collective bargaining
agreements applicable to any of them.

               (c) Neither PDS nor any Professional Corporation has experienced
any primary work stoppage or other organized work stoppage involving its
employees in the past two years.

3.06-2 Employee Benefits. Schedule 3.06-2 lists all pension, retirement, profit
sharing, deferred compensation, bonus, commission, incentive, life insurance,
health and disability insurance, hospitalization and all other employee benefit
plans or arrangements (including, without limitation, any contracts or
agreements with trustees, insurance companies or others relating to any such
employee benefit plans or arrangements) established or maintained by PDS and
complete and accurate copies of all those plans or arrangements have been
provided to GD Sub. The employee pension benefit plans (within the meaning of
Section 3(2) of the Employee Retirement Income Security Act of 1974, as amended
("ERISA")) established and maintained by PDS that are subject to ERISA are
listed separately as ERISA Plans on Schedule 3.06-2 (the "ERISA Plans"). The
ERISA Plans comply

                                       11
<PAGE>
with the applicable requirements of ERISA. PDS has received from the Internal
Revenue Service a favorable determination for each of the ERISA Plans and their
related trusts that each of the ERISA Plans is qualified under Section 401(a) of
the Internal Revenue Code of 1986, as amended (the "Code") and the related trust
is tax-exempt under Section 501(a) of the Code. There has been no event
subsequent to that determination that has adversely affected the tax qualified
status of the ERISA Plans or the exemption of the related trusts other than
changes in the Code that are not effective as of the Closing Date. No
"accumulated funding deficiency" as defined in Section 302(a)(2) of ERISA or
Section 412(a) of the Code exists, or has existed, with respect to any of the
ERISA Plans. The present value of all accrued benefits under each of the ERISA
Plans does not exceed the value of such plan's assets, less all liabilities
other than those attributable to accrued benefits. PDS has no "potential
withdrawal liability," as defined in Section 4201 of ERISA. None of the ERISA
Plans, its related trusts or any trustee, investment manager or administrator
thereof has engaged in a nonexempt "prohibited transaction," as such term is
defined in Section 406 of ERISA and Section 4975 of the Code. There are not and
have not been any excess deferrals or excess contributions under any ERISA Plan.
Each ERISA Plan is and has been operated and administered in conformance with
the requirements of all applicable laws and regulations, whether or not the
ERISA Plan documents have been amended to reflect such requirements. PDS has no
obligation of any kind (whether under the terms of the ERISA Plans or under any
understanding with employees) to make payments under, or to pay contributions to
or in respect of, any plan or arrangement listed on Schedule 3.06-2, or any
other plan, agreement or other arrangement for deferred compensation of
employees, whether or not tax qualified, including, without limitation, a single
employer tax qualified plan, a tax qualified plan of a controlled group of
corporations, a multi-employer pension plan, a nonqualified deferred
compensation plan, an individual employment or compensation agreement or a
commitment to provide medical benefits to retirees.

          3.06-3 Employment Agreements. Each of the employees of PDS and the
Professional Corporations is an "at-will" employee and, except as listed on
Schedule 3.06-3, there are no written employment, commission or compensation
agreements of any kind between PDS or any Professional Corporation and any of
their respective employees. Schedule 3.06-3 lists and includes all of PDS's
employment or supervisory manuals, employment or supervisory policies, and
written information generally provided to employees (such as applications or
notices), and true and complete copies of those manuals, policies and written
information have been provided to GD Sub. PDS does not have any agreements or
understandings with PDS's employees except as reflected in the items listed in
Schedules 3.06-2 and 3.06-3.

          3.06-4 Compensation. Schedule 3.06-4 contains a complete and accurate
list of all employees of PDS, as of June 29, 1998, specifying their names, hire
dates, the total amount paid or payable as compensation to each such person, and
the basis of such compensation.

     3.07 Financial Statements.

          3.07-1 Schedule 3.07 contains unaudited balance sheets of PDS as of
March 31, 1998 (the "Current Balance Sheets") and December 31, 1997 and 1996,
and the related statements of income for the years then ended (all such balance
sheets and statements collectively, the "Financial Statements").

                                       12
<PAGE>
          3.07-2 The Financial Statements present fairly

               (a) the financial position of PDS as of the dates indicated and

               (b) the results of operations for the periods then ended.

     3.08 Receivables. Schedule 3.08 separately lists all receivables of PDS and
Orange Dental Services from the Dental Practices and the Orange Dental Practice
or otherwise (including management fees receivable, accounts receivable, loans
receivable and advances) as of March 31, 1998. Each of the receivables listed on
Schedule 3.08, and each of the receivables that has arisen since March 31, 1998
has arisen only from bona fide transactions in the ordinary course of business
and is not subject to any offset or counterclaim.

     3.09 Prepaid Expenses and Other. Schedule 3.09 lists all prepaid expenses
and deferred charges of PDS, Orange Dental Services or the Dental Practices, and
each of them, reflected on the Current Balance Sheets as well as the items
included in the Other Assets line, if any, on the Current Balance Sheets.

     3.10 Personal Property. Section 1.01-1 and Schedule 3.10 together generally
describe all the tangible personal property owned or leased by PDS and Orange
Dental Services and used in any of the Dental Practices or the Administrative
Office or the Orange Dental Practice, other than excluded assets listed in
Schedule 1.02-2 ("Tangible Personal Property"). Schedule 3.10 lists the book
value of the Tangible Personal Property as of March 31, 1998.

     3.11 Payables. Schedule 3.11 lists all accounts payable and other accrued
liabilities of PDS and Orange Dental Services, as of March 31, 1998, other than
payables for brokers' and attorneys' fees and other expenses of this transaction
and accrued liabilities for taxes based on income or revenues of PDS.

     3.12 Indebtedness. Schedule 3.12 lists all indebtedness of PDS and, subject
to Section 9.02-3, the Professional Corporations as of June 30, 1998 incurred in
connection with the business, operations or assets of any Dental Practice or the
repayment of which is secured by the assets of any Dental Practice. For each
item of indebtedness, Schedule 3.12 shows the name of lender and the principal
balance.

     3.13 Other Liabilities. Except as listed on Schedule 3.13, neither PDS nor
any Professional Corporation has any liability or obligation (whether absolute,
accrued, contingent or other, and whether due or to become due), which is not
accrued, reserved against or disclosed in the Current Balance Sheets, other than
liabilities incurred in the ordinary course of business consistent with past
practice, which individually or in the aggregate would not have a Material
Adverse Effect.

     3.14 Absence of Certain Changes or Events. Since the date of the Current
Balance Sheets, there has not been with respect to PDS, the Dental Practices or
any of them:

                                       13
<PAGE>
          3.14-1 Any Material Adverse Change or any event, occurrence,
development or state of circumstances or facts which could reasonably be
expected to result in a Material Adverse Change;

          3.14-2 Any damage, destruction or casualty loss, whether insured
against or not, to any assets or properties associated with any of the Dental
Practices;

          3.14-3 Any increase in the rate or terms of compensation payable or to
become payable by PDS to its key employees; any increase in the rate or terms of
any bonus, insurance, pension or other employee benefit plan, payment or
arrangement made to, for or with any such key employees; any special bonus or
remuneration paid; or any written employment contract executed or amended;

          3.14-4 Any entry into any agreement, commitment or transaction
(including, without limitation, any borrowing, capital expenditure or capital
financing or any amendment, modification or termination of any existing
agreement, commitment or transaction) by PDS or any Professional Corporation,
except agreements, commitments or transactions in the ordinary course of
business and consistent with past practices or as expressly contemplated in this
Agreement;

          3.14-5 Any conduct of business which is outside the ordinary course of
business or not substantially in the manner that PDS previously provided
management services to the Dental Practices;

          3.14-6 Any purchase or other acquisition of property, any sale, lease
or other disposition of property, or any expenditure, except in the ordinary
course of business;

          3.14-7 Any incurrence of any noncontract liability which, either
singly or in the aggregate is material to the business, results of operations,
financial condition or prospects of any of the Dental Practices;

          3.14-8 Any encumbrance or consent to encumbrance of any property or
assets of PDS except in the ordinary course of business; or

          3.14-9 Any change in the assets, liabilities, licenses, permits or
franchises of PDS, or in any agreement to which PDS is a party or is bound,
which has had or reasonably could be expected to have a Material Adverse Effect.

     3.15 Leases. Schedule 3.15 contains a complete and accurate list of all
Leases of real property used or useful in the business of PDS, including the
lease at each Dental Practice location, a description of the real property
covered thereby (the "Real Property"), the term of each Lease and the monthly
payments under the Lease. Complete and accurate copies of all Leases have been
delivered to GD Sub.

                                       14
<PAGE>
     3.16 Certain Contracts and Arrangements. Schedule 3.16, which is organized
by type of agreement, contains a complete and accurate list of all Contracts of
the following types to which PDS or any Professional Corporation is a party or
by which PDS or any Professional Corporation is bound which relate to or are
associated with any of the Dental Practices:

          3.16-1 any mortgage, note or other instrument or agreement relating to
the borrowing of money or the incurrence of indebtedness by PDS or any
Professional Corporation or PDS's guaranty of any obligation for the borrowing
of money;

          3.16-2 contracts, agreements, purchase orders or acknowledgment forms
for the purchase, sale, lease or other disposition of capital assets or more
than $20,000 of other equipment or materials;

          3.16-3 contracts or agreements for the performance of services,
including but not limited to the PDS Management Agreements;

          3.16-4 contracts or agreements for the joint performance of work or
services and all other partnership or joint venture agreements;

          3.16-5 contracts or agreements with agents, brokers, consignees, sales
representatives or distributors relating to the sale of the services of PDS; and

          3.16-6 any other contract, instrument, agreement or obligation not
described on any other Schedule to which PDS or any Professional Corporation is
a party or by which PDS or any Professional Corporation is bound and which
contains material unfulfilled obligations of PDS, including but not limited to
the PDS Assignable Option Agreements.

Complete and accurate copies of all Contracts have been delivered to GD Sub.

     3.17 Status of Contracts and Leases.

          3.17-1 Each of the Contracts and Leases listed on Schedules 3.10, 3.15
and 3.16 is valid, binding and enforceable by PDS in accordance with its terms
and is in full force and effect. There is no existing default or violation by
PDS under any Contract or Lease and no event has occurred which (whether with or
without notice, lapse of time or both) would constitute a default of PDS under
any Contract or Lease. There is no pending or threatened proceeding which would
interfere with the quiet enjoyment of any Real Property of which PDS is lessee
or sublessee which is used by any of the Dental Practices.

          3.17-2 All other parties to the Contracts and Leases have consented or
prior to the Closing will have consented (where such consent is necessary) to
the consummation of the transaction contemplated by this Agreement without
requiring modification of PDS's rights or obligations under any Contract or
Lease.

                                       15
<PAGE>
          3.17-3 PDS is not aware of any default by any other party to any
Contract or Lease or of any event which (whether with or without notice, lapse
of time or both) would constitute a default by any other party with respect to
obligations of that party under any Contract or Lease, and, to the knowledge of
PDS, there are no facts that exist indicating that any of the Contracts or
Leases may be totally or partially terminated or suspended by the other parties.

          3.17-4 Neither PDS nor any Professional Corporation is a party to, nor
is it bound by, any contract or agreement that PDS can reasonably foresee will
result in any material loss to PDS or any of the Dental Practices upon the
performance thereof (including any material liability for penalties or damages,
whether liquidated, direct, indirect, incidental or consequential), unless such
contract or agreement is terminable by PDS or the applicable Professional
Corporation on 60 or fewer days notice at any time without penalty.

     3.18 Title and Condition of Tangible Assets.

          3.18-1 PDS owns all of the Tangible Personal Property except the
leased property free and clear of all mortgages, pledges, security interests,
claims, charges or other encumbrances or restrictions of any kind, except

               (a) liens disclosed on the Current Balance Sheets,

               (b) security interests or liens securing payment of Assumed
Liabilities or

               (c) liens for taxes not yet due or being contested in good faith
(and for which adequate accruals or reserves have been established on the
Current Balance Sheets).

          3.18-2 PDS has good and absolute title to the Tangible Personal
Property except the leased property. No Shareholder, Professional Corporation or
shareholder thereof, nor any other person or entity has any interest in any
property, real or personal, tangible or intangible, used in or pertaining to the
Dental Practices, other than indirectly as a shareholder of PDS. The immediately
preceding sentence shall not apply to patient charts, files and patient records
and contracts for the provision of dentistry services that may be owned or held
by the Professional Corporations.

          3.18-3 All Tangible Personal Property has been maintained and operated
in accordance with manufacturer's specifications and prudent industry practices,
is in a good state of maintenance and repair, ordinary wear and tear excepted,
and is adequate for the conduct of PDS's business.

          3.18-4 There are no developments affecting any of the Real Property or
Tangible Personal Property pending or, to the knowledge of PDS, threatened which
might materially detract from the value of such property or assets, materially
interfere with any present or intended use of any such property or assets or
materially adversely affect the marketability of such properties or assets.

          3.18-5 At the Closing, GD Sub will acquire good title to all the
Assets, free and clear of all mortgages, pledges, security interests,
claims,  charges or other  encumbrances or restrictions of any kind,  except for
security interests or liens securing payment of Assumed Liabilities.

                                       16
<PAGE>
     3.19 Insurance. Schedule 3.19 contains a complete and accurate list of all
policies (other than the malpractice insurance policies in effect for each of
the Professional Corporations) of liability, fire, worker's compensation and
other forms of insurance insuring PDS, the Professional Corporations, their
respective employees, and assets or operations of the Dental Practices, and each
of them, setting forth the applicable deductible amounts (all of the foregoing
policies including the malpractice insurance policies of the Professional
Corporations are hereinafter collectively defined as the "Policies"). All the
Policies are valid, enforceable and in full force and effect, all premiums with
respect to the Policies covering all periods up to and including the date as of
which this representation is being made have been paid and no notice of
cancellation or termination has been received with respect to any Policy. The
Policies are sufficient for compliance with all requirements of law and of
agreements to which PDS and the Professional Corporations are parties and
provide insurance for the risks and in the amounts and types of coverage usually
obtained by persons using or holding similar properties in similar businesses.
There are no unresolved claims for insurance payment under any of the Policies.
True and complete copies of the Policies and all endorsements thereto have been
delivered to GD Sub.

     3.20 Taxes.

          3.20-1 Returns. PDS has filed all federal, state and other returns,
reports and information returns required to be filed by it with respect to Taxes
(as defined below) (collectively, the "Returns") and has timely paid all Taxes
shown to be due on the Returns. All Returns filed are complete and accurate in
all material respects, and no additional Taxes are owed by PDS with respect to
the periods covered by the Returns. PDS has provided GD Sub with complete and
accurate copies of PDS's Returns for 1995 and 1996.

          3.20-2 Taxes Paid or Reserved. All deficiencies in Taxes asserted or
assessments made by any taxing authority have been fully paid or finally
settled, excluding property taxes that are not yet due. All Taxes which PDS or
any Professional Corporation has been required to collect or withhold have been
withheld or collected and, to the extent required, have been paid to the proper
taxing authority.

          3.20-3 Definition. "Taxes" means all taxes, charges, fees, levies or
other assessments including, without limitation, income, excise, property,
sales, use and franchise taxes, imposed by the United States or any state,
county, local or foreign government or subdivision or agency thereof, and
including any interest, penalties or additions.

     3.21 No Restrictions. No contract or agreement to which PDS is a party or
is bound or to which any of its properties or assets is subject limits the
freedom of PDS to compete in any line of business or with any person, excluding
the partnership agreements of the partnerships referenced in Section 1 of
Exhibit H hereto.

                                       17
<PAGE>
     3.22 Permits and Licenses. Except as set forth on Schedule 3.22, PDS, the
Professional Corporations and the shareholders of the Professional Corporations
hold and at all times have held, all licenses, permits, franchises, easements
and authorizations (collectively, "Permits") necessary for the lawful conduct of
each of the Dental Practices pursuant to all applicable statutes, laws,
ordinances, rules and regulations of all governmental bodies, agencies and other
authorities having jurisdiction over it or any part of its operations, except
where the failure to hold any Permit, singly or in the aggregate, either alone
or with the giving of notice or the passage of time or both, would not have a
Material Adverse Effect. PDS, the Professional Corporations and the shareholders
of the Professional Corporations, and each of them, are in compliance with all
the terms of each Permit, and there are no claims of violation by any such party
of any Permit.

     3.23 Certain Payments. Neither PDS nor any Shareholder, Professional
Corporation or sole shareholder of any Professional Corporation has, directly or
indirectly, on behalf of or with respect to any Dental Practice or its
operations made or received any payment that was not legal to make or receive
under federal, state or local laws of the United States or any other country or
territory.

     3.24 Environmental Conditions.

          3.24-1 Compliance. PDS has operated the Dental Practices and
maintained the Assets, including without limitation the Real Properties, in
compliance with all Environmental Laws. All wastes generated in connection with
the Dental Practices are and have been transported and disposed of off site in
compliance with all Environmental Laws. Except as otherwise required for the
normal operation of the Dental Practices, no Hazardous Substance is or has been
generated, manufactured, treated, stored, transported, used or otherwise handled
on the Real Properties or in connection with the Dental Practices.

          3.24-2 Definitions. As used in this Agreement,

               (a) "Environmental Law" means any federal, state or local
statute, ordinance or regulation pertaining to the protection of human health or
the environment and any applicable orders, judgments, decrees, permits, licenses
or other authorizations or mandates under such statutes, ordinances or
regulations, and

               (b) "Hazardous Substance" means any hazardous, toxic, radioactive
or infectious substance, material or waste as defined, listed or regulated under
any Environmental Law, and includes without limitation petroleum oil and its
fractions.

     3.25 Consents and Approvals. Except as set forth on Schedule 3.25, no
consent, approval or authorization of any court, regulatory authority,
governmental body, or any other entity or person not a party to this Agreement
is required for the consummation of the transactions described in this Agreement
by PDS or Shareholders. PDS and Shareholders have obtained, or shall have
obtained prior to the Closing, all consents, authorizations or approvals of any
third parties required in connection with the execution, delivery or performance
of this Agreement by PDS or Shareholders or the consummation of the transaction
contemplated by this Agreement. PDS has made all registrations

                                       18
<PAGE>
or filings with any governmental authority required for the execution or
delivery of this Agreement or the consummation of the transaction contemplated
hereby.

     3.26 Records. The books of account of PDS and the Professional Corporations
are complete and accurate in all material respects, and there have been no
transactions involving the business of PDS and the Professional Corporations
which properly should have been set forth therein and which have not been
accurately so set forth. Complete and accurate copies of such books have been
made available to GD Sub.

     3.27 Investment Representations. PDS is acquiring the Shares and each
Shareholder is acquiring beneficial ownership of the Shares for investment for
its, his or her own account, and not with a view to, or for resale in connection
with, any distribution of the Shares, other than a possible distribution of the
Shares from PDS to Shareholders. Neither PDS nor any Shareholder is a party to
any contract, undertaking, agreement or arrangement with any person to sell,
transfer or grant participation to any such person or any third party with
respect to the Shares. PDS and Shareholders acknowledge and understand that the
Shares are being offered and sold without registration under the 1933 Act or any
state securities law based on exemptions provided under such laws, and that the
representations contained in this Agreement are being relied upon by GD Sub and
GDSC in connection with those exemptions. PDS and Shareholders further
acknowledge and agree that the Shares are "restricted securities" under federal
securities laws and as such may not be sold or disposed of unless they are
registered under the 1933 Act and all applicable state securities laws or
unless, in the opinion of counsel acceptable to GD Sub and GDSC, exemptions from
the registration requirements of the 1933 Act and all applicable state
securities laws are available. In this regard, PDS and Shareholders acknowledge
that GDSC is under no obligation to register the Shares, that the Shares will
not be eligible for resale in the public market pursuant to Rule 144 under the
1933 Act until one year after the Closing Date, and that PDS and Shareholders
will bear the economic risk of ownership of the Shares at least until that time.
PDS and Shareholders consent to having appropriate legends placed on the
certificates representing the Shares relating to this restriction on transfer.

     3.28 Access to Information. Each Shareholder has received and carefully
reviewed GDSC's Annual Report on Form 10-KSB for the year ended December 31,
1997, GDSC's Quarterly Report on Form 10-QSB for the quarter ended March 31,
1998, and the Registration Statement. Each Shareholder believes he or she has
received all of the information he or she considers necessary or appropriate for
deciding whether to acquire shares of GDSC Common Stock. Each Shareholder
further represents that he or she has had an opportunity to ask questions and
receive answers from GDSC regarding GDSC, its business and financial condition,
and the terms and conditions of the Agreement.

     3.29 Sophistication. Shareholders, and each of them, together with their
purchaser representative, if any, have such knowledge and experience in
financial and business matters that they are capable of evaluating the merits
and risks of an investment in the Shares and have the capacity to protect their
own interests in connection with the transaction. PDS acknowledges that it has
received legal advice regarding the Agreement and the securities law
restrictions on the Shares from Miller & Holguin, PDS's attorneys, and has
received tax and other accounting advice regarding this transaction from Smith,
Linden & Basso LLP, PDS's accountants.

                                       19
<PAGE>
     3.30 Unanimous Consent. Execution of this Agreement by Shareholders
constitutes unanimous consent and approval of the shareholders of PDS to the
terms of this Agreement and the sale of the Assets contemplated thereby under
Section 603 of the California General Corporation Law.

     3.31 Reliance. PDS and Shareholders recognize and agree that,
notwithstanding any investigation by GD Sub, GD Sub is relying upon the
representations and warranties made by PDS and Shareholders in this Agreement.

     3.32 Accuracy of Representations and Warranties. None of the
representations or warranties of PDS and Shareholders contains or will contain
any untrue statement of any material fact or omits or misstates a material fact
necessary to make the statements contained in this Agreement not misleading. PDS
and Shareholders do not know of any fact that has resulted or that, in the
reasonable judgment of PDS or Shareholders will result, in any material adverse
change in PDS's business, results of operation, financial condition or prospects
that has not been set forth in this Agreement.


                                   ARTICLE IV

                        Covenants of PDS and Shareholders

     4.01 Access to Properties, Books and Records. Prior to the Closing Date,
PDS shall, at GD Sub's request, afford or cause to be afforded to the agents,
attorneys, accountants and other authorized representatives of GD Sub reasonable
access during normal business hours to all employees, properties, books and
records of PDS and the Professional Corporations and shall permit such persons,
at GD Sub's expense, to make copies of such books and records. PDS shall deliver
to GD Sub monthly financial statements of PDS promptly after they become
available. GDSC and GD Sub shall treat, and shall cause all of their agents,
attorneys, accountants and other authorized representatives to treat, all
information obtained pursuant to this Section 4.01 as confidential in accordance
with Section 10.01 hereof. No investigation by GDSC or GD Sub or any of their
authorized representatives pursuant to this Section 4.01 shall affect any
representation, warranty or closing condition of any party hereto or GD Sub's
rights to indemnification pursuant to Section 9.02 hereof.

     4.02 Negative Covenants. Except as otherwise permitted by this Agreement or
with the prior written consent of GD Sub, prior to the Closing Date, PDS shall
not, in connection with any of the Dental Practices:

          4.02-1 Incur additional debt for borrowed money (including without
limitation obligations under leases for real or personal property whether or not
required to be capitalized under generally accepted accounting principles),
incur or increase any obligation or liability (fixed, contingent or other,
including without limitation liabilities as a guarantor or otherwise with
respect to obligations of others) except in the ordinary and usual course of
business and consistent with past practices, forgive or release any debt or
claim, give any waiver of any right of material value or voluntarily suffer any
extraordinary loss;

                                       20
<PAGE>
          4.02-2 Make any payment to discharge or satisfy any lien or
encumbrance or pay any obligation or liability (fixed or contingent) other than
(a) current liabilities (including the current portion of any long-term
liabilities) included in the Financial Statements and (b) current liabilities
incurred or maturing since the dates of the Current Balance Sheets in the
ordinary course of business;

          4.02-3 Issue, sell, or give any option or right to purchase any shares
of its capital stock or other securities, or purchase, redeem or otherwise
acquire or commit to acquire, directly or indirectly, any shares of its capital
stock;

          4.02-4 Mortgage, pledge, otherwise encumber or subject to lien any of
its assets or properties, tangible or intangible, or commit itself to do any of
the foregoing;

          4.02-5 Except in the ordinary and usual course of its business and in
each case for fair consideration, dispose of, or agree to dispose of, any of its
assets or lease or license to others, or agree so to lease or license, any of
its assets;

          4.02-6 Acquire any assets which would be material to any of the Dental
Practices other than assets acquired in the ordinary and usual course of
business and consistent with past practices;

          4.02-7 Enter into any transaction or contract or make any commitment
to do the same, except in the ordinary and usual course of business and not
requiring the payment in any case of an amount in excess of $50,000 annually;

          4.02-8 Increase the wages, salaries, compensation, pension or other
benefits payable, or to become payable by it, to any of its employees or agents,
including without limitation any bonus payments or severance or termination pay,
other than increases in wages and salaries required by employment arrangements
existing on the date hereof or otherwise in the ordinary and usual course of its
business;

          4.02-9 Implement or agree to any implementation of or amendment or
supplement to any employee profit sharing, pension, bonus, commission,
incentive, retirement, medical reimbursement, life insurance, deferred
compensation or any other employee benefit plan or arrangement;

          4.02-10 Change its accounting methods, policies or practices; or

          4.02-11 Agree or commit to do any of the foregoing.

     4.03 Affirmative Covenants. Except as otherwise permitted by this Agreement
or with the prior written consent of GD Sub, prior to the Closing Date, PDS
shall:

          4.03-1 Operate the Dental Practices, including collecting receivables
and paying payables, as presently operated and only in the ordinary course and
consistent with past practices;

                                       21
<PAGE>
          4.03-2 Advise GD Sub in writing of any litigation or administrative
proceeding that challenges or otherwise materially affects the transactions
contemplated hereby and of any Material Adverse Change or any event, occurrence
or circumstance which is likely to cause a Material Adverse Change;

          4.03-3 When the consent of any third party to the transactions
contemplated by this Agreement is required under the terms of any contract or
agreement material to any of the Dental Practices to which PDS is a party or by
which PDS is bound, use its best efforts to obtain such consent on terms and
conditions not materially less favorable than those in effect on the date
hereof;

          4.03-4 Use its best efforts to maintain all of the Tangible Personal
Property in good operating condition, reasonable wear and tear excepted,
consistent with past practices, and take all steps reasonably necessary to
maintain its intangible assets;

          4.03-5 Not cancel or change any policy of insurance (including
self-insurance) or fidelity bond or any policy or bond providing substantially
the same coverage;

          4.03-6 Maintain, consistent with past practices, all inventories,
spare parts, office supplies and other expendable items;

          4.03-7 Use its best efforts to retain all employees;

          4.03-8 Maintain its books and records in accordance with past
practices;

          4.03-9 Pay and discharge all taxes, assessments, governmental charges
and levies imposed upon it, its income or profits or upon any property belonging
to it, in all cases prior to the date on which penalties attach thereto; and

          4.03-10 Comply with all laws, rules and regulations applicable to it
and to the Dental Practices.

     4.04 No Negotiations With Others. Except as otherwise permitted by this
Agreement or with the prior written consent of GD Sub, PDS and Shareholders
shall refrain, and shall cause PDS's employees and any investment banker,
attorney, accountant or other agent retained by either of them to refrain, from
initiating or soliciting any inquiries or making any proposals with respect to,
or engaging in negotiations concerning, or providing any confidential
information or data to or having any discussions with any person relating to,
any acquisition, business combination or purchase of all or any significant
portion of the assets of, or any equity interest in, PDS. PDS and Shareholders
will immediately cease and cause to be terminated any existing activities,
discussions or negotiations with any parties conducted heretofore with respect
to any of the foregoing.

     4.05 Employees. Effective as of the close of business on the Closing Date,
PDS shall terminate all of its employees at the Dental Practices and the
Administrative Office, other than Brady Aase, Donald Webb, and David Bryant.
Except as expressly assumed by GD Sub under this 

                                       22
<PAGE>
Agreement, PDS shall be responsible for and shall pay and discharge all
obligations to such employees arising out of or in connection with their
employment prior to Closing.

                                    ARTICLE V

                                 Joint Covenants

          GD Sub, PDS and Shareholders covenant and agree that they will act in
accordance with the following:

     5.01 Governmental Consents. Promptly following the execution of this
Agreement, the parties will proceed to prepare and file with the appropriate
governmental authorities any requests for approval or waiver, if any, that are
required from governmental authorities in connection with the transactions
contemplated hereby, and the parties shall diligently and expeditiously
prosecute and cooperate fully in the prosecution of such requests for approval
or waiver and all proceedings necessary to secure such approvals and waivers.

     5.02 Best Efforts; No Inconsistent Action. Each party will use its best
efforts to effect the transactions contemplated by this Agreement and to fulfill
the conditions to the obligations of the other parties set forth in Article 6 or
7 of this Agreement. No party will take any action inconsistent with its
obligations under this Agreement or that could hinder or delay the consummation
of the transactions contemplated by this Agreement, except that nothing in this
Section 5.02 shall limit the rights of the parties under Articles 6, 7 and 8.


                                   ARTICLE VI
                       Conditions to Obligations of GD Sub

          The obligations of GD Sub under Article 1 are, at its option, subject
to satisfaction, at or prior to the Closing, of each of the following
conditions:

     6.01 Governmental Approvals. All authorizations, consents and approvals of
all governmental agencies and authorities required to be obtained in order to
permit consummation of the transactions contemplated by this Agreement shall
have been obtained and be satisfactory in form and content to GD Sub.

     6.02 Consents. PDS shall have obtained the third-party consents required
under the terms of the Contracts and Leases, except for those Contracts and
Leases for which the necessity of obtaining consent to assignment is waived by
GD Sub as indicated on Schedule 3.25, and such consents shall not have required
any change to the terms and conditions of the Contracts and Leases other than
changes consented to in writing by GD Sub.

                                       23
<PAGE>
     6.03 Representations, Warranties and Covenants.

          6.03-1 All representations and warranties of PDS and Shareholders made
in this Agreement, or in any certificate delivered pursuant hereto, shall in all
material respects be true and complete on and as of the Closing Date with the
same force and effect as if made on and as of that date.

          6.03-2 All of the terms, covenants and conditions to be complied with
and performed by PDS and Shareholders at or prior to the Closing shall in all
material respects have been complied with or performed thereby.

          6.03-3 GD Sub shall have received a certificate of PDS, dated as of
the Closing Date, to the effect that the representations and warranties of PDS
and Shareholders contained in this Agreement are in all material respects true
and complete on and as of the Closing Date as though made on and as of the
Closing Date and that PDS and Shareholders have in all material respects
complied with or performed all terms, covenants and conditions to be complied
with or performed by him at or prior to the Closing.

     6.04 Adverse Proceedings. No suit, action, claim or governmental proceeding
shall have been instituted or threatened against, and no order, decree or
judgment of any court, agency or other governmental authority shall have been
rendered against, GDSC, GD Sub, PDS or any Shareholder to restrain or prohibit,
or obtain damages in respect of, this Agreement or the transactions contemplated
by this Agreement.

     6.05 No Adverse Change. There shall not have been any Material Adverse
Change.

     6.06 Management Agreement. Each PDS Management Agreement assigned by PDS to
GD Sub pursuant to Section 1.01-6 shall have been amended and restated as a
Management Agreement with GD Sub in the form attached hereto as Exhibit E, and
each Professional Corporation shall have executed and delivered such a
Management Agreement.

     6.07 Shares Acquisition Agreement. Each PDS Assignable Option Agreement
assigned by PDS to GD Sub pursuant to Section 1.01-6 shall have been amended and
restated as a Shares Acquisition Agreement relating to the stock of the
Professional Corporation in the form attached hereto as Exhibit F, and each
Professional Corporation and its sole shareholder shall have executed and
delivered such a Shares Acquisition Agreement.

     6.08 Dentist Employment Agreements. Each sole shareholder of a Professional
Corporation shall have executed and delivered a Dentist Employment Agreement
with the applicable Professional Corporation in the form attached hereto as
Exhibit G.

     6.09 Closing and Signing of Related Transactions. The transactions
contemplated by the following agreements shall close simultaneously with the
Closing: Asset Purchase Agreement dated June 30, 1998 by and among GDSC, GD Sub,
Orange Dental Services and the partners of Orange Dental Services; and Asset
Purchase Agreement dated June 30, 1998 by and among GDSC, GD Sub

                                       24
<PAGE>
and Bryan Watanabe D.D.S., Inc. All parties shall have executed and delivered
the Asset Purchase Agreement dated June 30, 1998 by and among GDSC, GD Sub, TG3
Dental Services and the partners of TG3 Dental Services.

     6.10 Agreement Regarding New Offices. PDS shall have executed and delivered
an Agreement Regarding New Offices with GDSC and GD Sub in the form attached
hereto as Exhibit H.

     6.11 Employment Agreement. Stephen E. Thorne IV shall have executed and
delivered an Employment Agreement with GD Sub in the form attached hereto as
Exhibit I.

     6.12 Checks from TN Dental Services and TG3 Dental Services. TN Dental
Services shall have delivered to GD Sub a check for $22,843 in respect of a
portion of a debt of PDS being assumed by GD Sub, and TG3 Dental Services shall
have delivered to GD Sub a check for $20,068 in respect of a portion of a debt
of PDS being assumed by GD Sub.

     6.13 Actions Satisfactory to GD Sub's Counsel. All actions, proceedings,
instruments and documents required to be carried out by this Agreement, or
incidental hereto, and all other relevant legal matters shall be reasonably
satisfactory to counsel for GD Sub.


                                   ARTICLE VII

                        Conditions to Obligations of PDS

     The obligations of PDS under Article I are, at its option, subject to
satisfaction, at or prior to the Closing, of each of the following conditions:

     7.01 Representations, Warranties and Covenants.

          7.01-1 All representations and warranties of GDSC and GD Sub made in
this Agreement and in any certificate delivered pursuant hereto shall in all
material respects be true and complete on and as of the Closing Date with the
same force and effect as if made on and as of that date.

          7.01-2 All of the terms, covenants and conditions to be complied with
and performed by GDSC and GD Sub on or prior to the Closing shall in all
material respects have been complied with or performed by GDSC and GD Sub.

          7.01-3 PDS shall have received a Certificate of GDSC and GD Sub, dated
as of the Closing Date, executed by the President or other authorized officer of
GDSC and GD Sub, to the effect that the representations and warranties of GDSC
and GD Sub contained in this Agreement are in all material respects true and
complete on and as of the Closing Date as though made on and as of the Closing
Date and that GDSC and GD Sub have in all material respects complied with or
performed all terms, covenants and conditions to be complied with or performed
by them at or prior to the Closing.

                                       25
<PAGE>
     7.02 Adverse Proceedings. No suit, action, claim or governmental proceeding
shall have been instituted or threatened against, and no order, decree or
judgment of any court, agency or other governmental authority shall have been
rendered against, GDSC, GD Sub, PDS or any Shareholder to restrain or prohibit
this Agreement or the transactions contemplated by this Agreement.

     7.03 Stock Price. The Stock Price shall not be less than $4.00 per share of
GDSC Common Stock.

     7.04 Agreement Regarding New Offices. GDSC and GD Sub shall have executed
and delivered an Agreement Regarding New Offices with PDS in the form attached
hereto as Exhibit H.

     7.05 Employment Agreement. GD Sub shall have executed and delivered an
Employment Agreement with Stephen E. Thorne IV in the form attached hereto as
Exhibit I.

                                  ARTICLE VIII

                                   Termination

     8.01 Right of Parties to Terminate. This Agreement may be terminated:

          8.01-1 by GD Sub, if any of the authorizations, consents, approvals,
filings or registrations described in Section 6.01 hereof, other than as may
pertain to those Contracts and Leases for which the necessity of obtaining
consent to assignment is waived by GD Sub as indicated on Schedule 3.25, shall
have been denied, not permitted to go into effect or obtained on terms not
reasonably satisfactory to GD Sub and all reasonable final appeals shall have
been exhausted;

          8.01-2 by GD Sub, if PDS or Shareholders or any of them shall have
breached any of their obligations hereunder in any material respect;

          8.01-3 by PDS, if GD Sub shall have breached any of its obligations
hereunder in any material respect or if the Stock Price falls below $4.00; or

          8.01-4 by either PDS or GD Sub, by written notice to the other party,
if the Closing shall not have occurred on or prior to March 31, 1999; provided,
however, that the right to terminate this Agreement under this Section 8.01-4
shall not be available to any party whose failure to fulfill or perform any
obligation under this Agreement has been the cause of, or resulted in, the
failure of the Closing to occur on or before such date.

     8.02 Effect of Termination. If either GD Sub or PDS decides to terminate
this Agreement pursuant to Section 8.01, such party shall promptly give written
notice to the other party to this Agreement of such decision. In the event of a
termination pursuant to Section 8.01, the parties hereto shall be released from
all liabilities and obligations arising under this Agreement (other than those
described in Article 10 hereof) with respect to the matters contemplated by this
Agreement, other than for damages arising from a breach of this Agreement.

                                       26
<PAGE>
                                   ARTICLE IX

                            Survival; Indemnification

     9.01 Survival. All representations, warranties, covenants and agreements
made in this Agreement or in any schedule, certificate or assignment delivered
in accordance with this Agreement (collectively, the "Related Documents") shall
survive any investigation by or on behalf of any party, the execution and
delivery of this Agreement, the consummation of the transactions contemplated
hereby and any termination or expiration of this Agreement for a period of three
and one-half years following the Closing Date and after such period shall be
terminated and extinguished, except insofar as the damaged party shall have
asserted in writing a claim setting forth with reasonable specificity facts and
circumstances relating thereto prior to the expiration of such period in which
event the party liable shall remain liable with respect to such claim.

     9.02 Indemnification by PDS and Shareholders.

          9.02-1 Notwithstanding any investigation by GDSC or GD Sub, from and
after the Closing, PDS and Shareholders shall indemnify, hold harmless and, to
the extent provided in Section 9.04-1, defend GDSC, GD Sub, and their respective
subsidiaries, shareholders, affiliates, officers, directors, employees, agents,
successors and assigns (collectively, "GD Sub's Indemnified Persons") from and
against, and reimburse each of GD Sub's Indemnified Persons with respect to, any
and all losses, damages, liabilities, costs and expenses, including interest
from the date of such loss to the time of payment, penalties and reasonable
attorneys' fees (collectively, "Damages") incurred by any of GD Sub's
Indemnified Persons by reason of or arising out of or in connection with:

               (a) any material breach or inaccuracy of any representation or
warranty of PDS or Shareholders, or any of them, made in this Agreement or any
Related Document;

               (b) any failure by PDS or Shareholders, or any of them, to
perform any covenant required to be performed by them pursuant to this Agreement
or any Related Document after reasonable opportunity to cure; or

               (c) any liability or obligation of PDS or Shareholders, or any of
them, arising out of or in connection with the ownership, use, condition,
maintenance or operation of the Dental Practices or the Assets by PDS on or
prior to the Closing, in either case not expressly assumed by GD Sub in
accordance with the terms of this Agreement, and specifically including any
liability to pay cash to a terminated employee on account of accrued vacation
time.

          9.02-2 This indemnification extends to any Damages suffered by any of
GD Sub's Indemnified Persons, whether or not a claim is made against any of GD
Sub's Indemnified Persons by any third party.

          9.02-3 PDS and Shareholders shall not be liable for breach of the
representations in Sections 3.01 and 3.05 in respect of Russel L. Perin II,
D.D.S., Inc., except to the extent that the 

                                       27
<PAGE>
Damages incurred by GD Sub's Indemnified Persons as a result of any and all such
breaches exceeds $50,000.

     9.03 Indemnification by GD Sub.

          9.03-1 Notwithstanding any investigation by PDS or Shareholders, from
and after the Closing, GDSC and GD Sub shall indemnify, hold harmless and, to
the extent provided in Section 9.04-1, defend PDS, Shareholders, and their
respective partners, affiliates, officers, employees, agents, successors and
assigns (collectively, "PDS's Indemnified Persons") from and against, and
reimburse each of PDS's Indemnified Persons with respect to, any and all Damages
incurred by any of PDS's Indemnified Persons by reason of or arising out of or
in connection with:

               (a) any material breach or inaccuracy of any representation or
warranty of GDSC or GD Sub made in this Agreement or any Related Document;

               (b) any failure by GDSC or GD Sub to perform any covenant
required to be performed by them pursuant to this Agreement or any Related
Document after reasonable opportunity to cure; or

               (c) any liability or obligation of PDS to any third party
expressly assumed by GD Sub in accordance with the terms of this Agreement.

          9.03-2 This indemnification extends to any Damages suffered by any of
PDS's Indemnified Persons whether or not a claim is made against any of PDS's
Indemnified Persons by any third party.

     9.04 Indemnification Procedure.

          9.04-1 Third Party Claims.

               (a) Each indemnified party shall, with reasonable promptness
after obtaining knowledge thereof, provide any indemnifying party against whom a
claim for indemnification is to be made under this Article 9 with written notice
of all third party actions, suits, proceedings, claims, demands or assessments
that may be subject to the indemnification provisions of this Article 9
(collectively, "Third Party Claims"), including, in reasonable detail, the basis
for the claim, the nature of Damages and a good faith estimate of the amount of
Damages.

               (b) Each indemnifying party shall have 15 days after its receipt
of the claim notice to notify the indemnified party in writing whether the
indemnifying party agrees that the claim is subject to this Article 9 and, if
so, whether the indemnifying party elects, jointly with any other indemnifying
party notified under Section 9.04-1(a), to undertake, conduct and control,
through counsel of its or their choosing (subject to the consent of the
indemnified party, such consent not to be withheld unreasonably) and at its or
their sole risk and expense, the good faith settlement or defense of the Third
Party Claim.

                                       28
<PAGE>
               (c) If within 15 days after its receipt of the claim notice an
indemnifying party notifies the indemnified party that it elects to undertake
the good faith settlement or defense of the Third Party Claim, the indemnified
party shall cooperate reasonably with the indemnifying party in connection
therewith including, without limitation, by making available to the indemnifying
party all relevant information material to the defense of the Third Party Claim.
The indemnified party shall be entitled to participate in the settlement or
defense of the Third Party Claim through counsel chosen by the indemnified
party, at its expense, and to approve any proposed settlement that would impose
any obligation or duty on the indemnified party, which approval may, in the sole
discretion of the indemnified party, be withheld. So long as an indemnifying
party is contesting the Third Party Claim in good faith and with reasonable
diligence, the indemnified party shall not pay or settle the Third Party Claim.
Notwithstanding the foregoing, the indemnified party shall have the right to pay
or settle any Third Party Claim at any time, provided that in such event it
waives any right to indemnification therefor by the indemnifying party.

               (d) If an indemnifying party does not provide notice that it
elects to undertake the good faith settlement or defense of the Third Party
Claim, or if an indemnifying party fails to contest the Third Party Claim or
undertake or approve settlement, in good faith and with reasonable diligence,
the indemnified party shall thereafter have the right to contest, settle or
compromise the Third Party Claim at its exclusive discretion, at the risk and
expense of the indemnifying party, and the indemnifying party will thereby waive
any claim, defense or argument that the indemnified party's settlement or
defense of such Third Party Claim is in any respect inadequate or unreasonable.

               (e) A party's failure to give timely notice will not constitute a
defense, in part or in whole, to any claim for indemnification by such party,
except if, and only to the extent that, such failure results in any material
prejudice to the indemnifying party.

          9.04-2 Non-Third Party Claims.

               (a) Each indemnified party shall, with reasonable promptness,
deliver to any indemnifying party against whom a claim for indemnification is to
be made under this Article 9 written notice of all claims for indemnification
under this Article 9, other than Third Party Claims, including, in reasonable
detail, the basis for the claim, the nature of Damages and a good faith estimate
of the amount of Damages.

               (b) Each indemnifying party shall have 30 days after its receipt
of the claim notice to notify the indemnified party in writing whether or not
the indemnifying party accepts liability for all or any part of the Damages
described in the claim notice. If the indemnifying party does not so notify the
indemnified party, the indemnifying party shall be deemed to accept liability
for all the Damages described in the claim notice.

               (c) A party's failure to give timely notice will not constitute a
defense, in part or in whole, to any claim for indemnification by such party,
except if, and only to the extent that, such failure results in any material
prejudice to the indemnifying party.

                                       29
<PAGE>
     9.05 Right of Offset. At the election of GD Sub, any liability of PDS or
any Shareholder under Section 9.02 which has been established by agreement,
litigation or in accordance with the procedure set forth in Section 9.04 may be
satisfied by offsetting such liability against any Earnout Consideration then
due or that subsequently becomes due. For this purpose, a liability shall not be
deemed to have been established in accordance with the procedure set forth in
Section 9.04 if PDS or the Shareholder has asserted under Section 9.04-1(b) that
the liability is not subject to this Article 9 and the question has not been
resolved by agreement or litigation.

     9.06 Rights Not Exclusive. An indemnified party's rights to indemnification
under this Article 9 are in addition to, and not in lieu of, any other rights to
which the indemnified party may be entitled at law or in equity.


                                    ARTICLE X

                         Confidentiality; Press Releases

     10.01 Confidentiality.

          10.01-1 No information concerning PDS not previously disclosed to the
public or in the public domain that has been furnished to or obtained by GDSC or
GD Sub under this Agreement or in connection with the transactions contemplated
hereby shall be disclosed to any person other than in confidence to employees,
legal counsel, financial advisers or independent public accountants of GDSC or
GD Sub or used for any purpose other than as contemplated herein. If the
transactions contemplated by this Agreement are not consummated, GDSC and GD Sub
shall hold such information in confidence for a period of four years from the
date of any termination of this Agreement, and all such information that is in
writing or embodied on a diskette, tape or other tangible medium shall be
promptly returned to PDS.

          10.01-2 No information concerning GDSC or GD Sub not previously
disclosed to the public or in the public domain that has been furnished to or
obtained by PDS or Shareholders under this Agreement or in connection with the
transactions contemplated hereby shall be disclosed to any person other than in
confidence to the employees, legal counsel, financial advisers or independent
public accountants of PDS or used for any purpose other than as contemplated
herein. If the transactions contemplated by this Agreement are not consummated,
PDS and Shareholders shall hold such information in confidence for a period of
four years from the date of any termination of this Agreement, and all such
information that is in writing or embodied on a diskette, tape or other tangible
medium shall be promptly returned to GD Sub.

                                       30
<PAGE>
          10.01-3 Notwithstanding the foregoing, such obligations of GD Sub and
of PDS shall not apply to information

               (a) that is, or becomes, publicly available from a source other
than GD Sub or PDS, as the case may be;

               (b) that was known and can be shown to have been known by GD Sub
at the time of its receipt from PDS, or by PDS at the time of its receipt from
GD Sub, as the case may be;

               (c) that is received by GD Sub from a third party without breach
of this Agreement by GD Sub, or is received by PDS from a third party without
breach of this Agreement by PDS, as the case may be;

               (d) that is required by law to be disclosed; or

               (e) that is disclosed in accordance with the written consent of
GD Sub or of PDS, as the case may be.

     10.02 Press Releases. No press releases or other public announcements
concerning the transactions contemplated by this Agreement shall be made by PDS
without the prior written consent of GD Sub; provided, however, that nothing
herein shall prevent a party from supplying such information or making
statements as required by governmental authority or in order for a party to
satisfy its legal obligations (prompt notice of which shall in any such case be
given to the other party or parties).

                                   ARTICLE XI

                                Other Provisions

     11.01 Benefit and Assignment. This Agreement shall be binding upon and
shall inure to the benefit of the parties hereto and their respective successors
and assigns. No party hereto may voluntarily or involuntarily assign such
party's interest under this Agreement without the prior written consent of the
other parties.

     11.02 Entire Agreement. This Agreement and the Schedules and Exhibits
referred to herein embody the entire agreement and understanding of the parties
and supersede any and all prior agreements, arrangements and understandings
relating to matters provided for herein.

     11.03 Fees and Expenses. GDSC and GD Sub shall be solely responsible for
all costs and expenses incurred by them, and PDS shall be solely responsible for
all costs and expenses incurred by PDS, in connection with the negotiation,
preparation and performance of and compliance with the terms of this Agreement.

                                       31
<PAGE>
     11.04 Amendment, Waiver, etc. The provisions of this Agreement may be
amended or waived only by an instrument in writing signed by the party against
which enforcement of such amendment or waiver is sought. Any waiver of any term
or condition of this Agreement or any breach hereof shall not operate as a
waiver of any other such term, condition or breach, and no failure to enforce
any provision hereof shall operate as a waiver of such provision or of any other
provision hereof.

     11.05 Headings. The headings are for convenience only and will not control
or affect the meaning or construction of the provisions of this Agreement.

     11.06 Governing Law. The construction and performance of this Agreement
will be governed by the laws of the State of Washington (except for the choice
of law provisions thereof).

                                       32
<PAGE>
     11.07 Notices. Any notice, demand or request required or permitted to be
given under the provisions of this Agreement shall be in writing; shall be
delivered personally, including by means of telecopy, or mailed by registered or
certified mail, postage prepaid and return receipt requested; shall be deemed
given on the date of personal delivery or on the date set forth on the return
receipt; and shall be delivered or mailed to the addresses or telecopy numbers
set forth on the first page of this Agreement or to such other address as any
party may from time to time direct, with copies to:

           In the case of GDSC or GD Sub:

                 Stoel Rives LLP
                 900 SW Fifth Avenue, Suite 2300
                 Portland, OR  97204
                 Telecopy No.:  (503) 220-2480

                 Attention:  Edward L. Epstein

           In the case of PDS or Shareholders:

                 Miller & Holguin
                 1801 Century Park East, 7th Floor
                 Los Angeles, CA 90067
                 Telecopy No.:  (310) 557-2205

                 Attention:   Henry Holguin

     11.08 Breach; Equitable Relief. The parties acknowledge that the Dental
Practices and rights of the parties described in this Agreement are unique and
that money damages alone for breach of this Agreement would be inadequate. Any
party aggrieved by a breach of the provisions hereof may bring an action at law
or suit in equity to obtain redress, including specific performance, injunctive
relief or any other available equitable remedy. Time and strict performance are
of the essence in this Agreement.

     11.09 Attorneys' Fees. If suit or action is filed by any party to enforce
the provisions of this Agreement or otherwise with respect to the subject matter
of this Agreement, the prevailing party shall be entitled to recover reasonable
attorneys' fees as fixed by the trial court and, if any appeal is taken from the
decision of the trial court, reasonable attorneys' fees as fixed by the
appellate court. For purposes of this Agreement, the term "prevailing party"
shall be deemed to include a party that successfully opposes a petition for
review filed with an appellate court.

     11.10 Guarantee. GDSC irrevocably and unconditionally guarantees that GD
Sub will perform each and every obligation of GD Sub under this Agreement and
waives and agrees not to assert or take advantage of any of the following to the
extent they might apply: (a) any right to require PDS or Shareholders to proceed
against GD Sub, it being understood and agreed that PDS and Shareholders may
proceed against GDSC without first proceeding against GD Sub or any other person
or entity; (b) PDS's or Shareholders' failure to file or enforce any claim in
any bankruptcy or insolvency proceedings against GD Sub; (c) any presentment,
demand, protest or notice of any kind to GDSC, including without limitation,
notice of the acceptance of this guarantee, or of any action or nonaction on the
part of GD Sub under this Agreement; or (d) any right to prior notice and
approval of any extension of the time for payment of any amounts or performance
of any obligations due under this Agreement or any other modification,
alteration or change of this Agreement.

     11.11 Counterparts. This Agreement may be executed in one or more
counterparts, each of which will be deemed an original but all of which together
will constitute one and the same instrument.

                                       33
<PAGE>
          IN WITNESS WHEREOF, the parties have executed this Agreement as of the
day and year first written above.

     GDSC:                             GENTLE DENTAL SERVICE CORPORATION


                                       By: L. T. VAN EERDEN
                                           -------------------------------------
                                       Title: Executive Vice President
                                              ----------------------------------


     GD SUB:                           GENTLE DENTAL MANAGEMENT, INC.


                                       By: L. T. VAN EERDEN
                                           -------------------------------------
                                       Title: Executive Vice President
                                              ----------------------------------


     PDS:                              PACIFIC DENTAL SERVICES, INC.


                                       By: STEPHEN THORNE IV
                                           -------------------------------------
                                       Title: President
                                              ----------------------------------


     SHAREHOLDERS:
                                       STEPHEN THORNE, IV
                                       -----------------------------------------
                                       Stephen E. Thorne, IV



                                       CAROLYN G. GHAZAL DDS
                                       -----------------------------------------
                                       Carolyn G. Ghazal, D.D.S.



                                       JEFFREY A. NEAL DDS
                                       -----------------------------------------
                                       Jeffrey A. Neal, D.D.S.



                                       RAYMOND CHOI DDS
                                       -----------------------------------------
                                       Raymond Choi, D.D.S.



                                       CHARLES RODGERS
                                       -----------------------------------------
                                       Charles Rodgers, D.D.S.

                                       34
<PAGE>
                                       STEVEN DARMSTADT DDS
                                       -----------------------------------------
                                       Steven Darmstadt,  D.D.S., M.S.



                                       JON THORNE
                                       -----------------------------------------
                                       Jon Thorne



                                       DAVID BRYANT
                                       -----------------------------------------
                                       David Bryant

                                       35
<PAGE>
                                                                       EXHIBIT A

                                DENTAL PRACTICES


1.    Victor Valley Dental Group - Hesperia
      16455 Main Street, Suite 17
      Hesperia, CA

2.    Westpark Family Dental Office
      2409 West 17th Street
      Santa Ana, CA

3.    Apple Valley Dental Practice
      18245 Highway #18, Suite 4
      Apple Valley, CA

4.    Riverside Family Dental Office
      10286 Indiana Ave.
      Riverside, CA 92503

5.    California Dental Office-Russel Perin D.D.S.
      12800 Heacock Blvd., Suite A-1
      Moreno Valley, CA

6.    Pacific Dental Group
      2000 Harbor Blvd., Suite C-104
      Costa Mesa, CA

7.    Corona Dental Center
      1074 West Sixth Street, Suite 104
      Corona, CA


                                      A-1
<PAGE>
                                                                       EXHIBIT B

                            PROFESSIONAL CORPORATIONS


1.   Carolyn G. Ghazal, D.D.S., Inc. d.b.a. Victor Valley Dental Group
     - Hesperia
     16455 Main Street, Suite 17
     Hesperia, CA

2.   Raymond Yoonseok Choi, D.D.S., Inc. d.b.a. West Park Family Dental
     2409 West 17th Street
     Santa Ana, CA

3.   Charles Rodgers, D.D.S., Inc. d.b.a. Apple Valley Dental Practice
     18245 Highway #18, Suite 4
     Apple Valley, CA

     Charles Rodgers, D.D.S., Inc. d.b.a. Corona Dental Center
     1074 West Sixth Street, Suite 104
     Corona, CA

4.   Bryan K. Watanabe, D.D.S., Inc. d.b.a. Riverside Family Dental Office
     10286 Indiana Ave.
     Riverside, CA 92503

5.   Russel L. Perin II, D.D.S., Inc. d.b.a. California Dental Office-Russel
     Perin D.D.S.
     12800 Heacock Blvd., Suite A-1
     Moreno Valley, CA

6.   Ronald Gardner, D.D.S., Inc. d.b.a. Pacific Dental Group
     2000 Harbor Blvd., Suite C-104
     Costa Mesa, CA


                                      B-1

                            ASSET PURCHASE AGREEMENT

                                    between

                       GENTLE DENTAL SERVICE CORPORATION,

                         GENTLE DENTAL MANAGEMENT, INC.

                                      and

                             ORANGE DENTAL SERVICES


                              Dated June 30, 1998

<PAGE>
                               TABLE OF CONTENTS



                                                                          Page
                                                                          ----

ARTICLE I - Purchase and Sale of Assets..............................       2

         1.01     Purchase and Sale..................................       2
         1.02     Excluded Assets....................................       3
         1.03     Assumption of Liabilities..........................       3
         1.04     Purchase Price.....................................       3
         1.05     Instruments of Conveyance and Transfer.............       5
         1.06     Further Assurances.................................       5
         1.07     Closing  ..........................................       5
         1.08     Sales Tax..........................................       5
         1.09     Allocation of Purchase Price.......................       5

ARTICLE II - Representations and Warranties of GD Sub and GDSC.......       5

         2.01     Authorization......................................       5
         2.02     Compliance.........................................       6
         2.03     Consents...........................................       6
         2.04     Accuracy of Representations & Warranties...........       6

ARTICLE III - Representations and Warranties of Orange and Partners..       6

         3.01     Corporate Existence; Authority.....................       7
         3.02     No Adverse Consequences............................       7
         3.03     Brokers and Finders................................       8
         3.04     Litigation.........................................       8
         3.05     Compliance with Laws...............................       8
         3.06     Employment Matters.................................       8
         3.07     [Reserved].........................................      10
         3.08     [Reserved].........................................      10
         3.09     [Reserved].........................................      10
         3.10     [Reserved].........................................      10
         3.11     [Reserved].........................................      10
         3.12     Indebtedness.......................................      10
         3.13     Other Liabilities..................................      10
         3.14     Absence of Certain Changes or Events...............      10
         3.15     Leases   ..........................................      11
         3.16     Certain Contracts and Arrangements.................      11
         3.17     Status of Contracts and Leases.....................      12
         3.18     Title and Condition of Tangible Assets.............      13
         3.19     Insurance..........................................      13
         3.20     Taxes    ..........................................      14
         3.21     No Restrictions....................................      14

                                       i
<PAGE>
                                                                          Page
                                                                          ----

         3.22     Permits and Licenses...............................      14
         3.23     Certain Payments...................................      15
         3.24     Environmental Conditions...........................      15
         3.25     Consents and Approvals.............................      15
         3.26     Records  ..........................................      15
         3.27     Reliance...........................................      16
         3.28     Accuracy of Representations and Warranties.........      16

ARTICLE IV - Covenants of Orange and Partners........................      16

         4.01     Access to Properties, Books and Records............      16
         4.02     Negative Covenants.................................      16
         4.03     Affirmative Covenants..............................      17
         4.04     No Negotiations With Others........................      18
         4.05     Employees..........................................      19
         4.06     Offset of Notes....................................      19

ARTICLE V - Joint Covenants..........................................      19

         5.01     Governmental Consents..............................      19
         5.02     Best Efforts; No Inconsistent Action...............      19

ARTICLE VI - Conditions to Obligations of GD Sub.....................      19

         6.01     Governmental Approvals.............................      19
         6.02     Consents...........................................      20
         6.03     Representations, Warranties and Covenants..........      20
         6.04     Adverse Proceedings................................      20
         6.05     No Adverse Change..................................      20
         6.06     Management Agreement...............................      20
         6.07     Shares Acquisition Agreement.......................      20
         6.08     Dentist Employment Agreements......................      21
         6.09     Closing and Signing of Related Transactions........      21
         6.10     Actions Satisfactory to GD Sub's Counsel...........      21

ARTICLE VII - Conditions to Obligations of Orange....................      21

         7.01     Representations, Warranties and Covenants..........      21
         7.02     Adverse Proceedings................................      22

ARTICLE VIII - Termination...........................................      22

         8.01     Right of Parties to Terminate......................      22
         8.02     Effect of Termination..............................      22

                                       ii
<PAGE>
                                                                          Page
                                                                          ----

ARTICLE IX - Survival; Indemnification...............................      23

         9.01     Survival...........................................      23
         9.02     Indemnification by Orange and Partners.............      23
         9.03     Indemnification by GD Sub..........................      24
         9.04     Indemnification Procedure..........................      24
         9.05     Right of Offset....................................      26
         9.06     Rights Not Exclusive...............................      26

ARTICLE X - Confidentiality; Press Releases..........................      26

         10.1     Confidentiality....................................      26
         10.2     Press Releases.....................................      27

ARTICLE XI - Other Provisions........................................      27

         11.01    Benefit and Assignment.............................      27
         11.02    Entire Agreement...................................      27
         11.03    Fees and Expenses..................................      27
         11.04    Amendment, Waiver, etc.............................      28
         11.05    Headings...........................................      28
         11.06    Governing Law......................................      28
         11.07    Notices  ..........................................      28
         11.08    Breach; Equitable Relief...........................      28
         11.09    Attorneys' Fees....................................      29
         11.10    Guarantee..........................................      29
         11.11    Counterparts.......................................      29

                                      iii
<PAGE>
                             INDEX OF DEFINED TERMS


Term                                                    Location of Definition
- ----                                                    ----------------------

Admin Charge.........................................   1.04-3
Adjusted Cash Consideration Amount...................   1.04-1
Administrative Office................................   1.04-3
Assets...............................................   1.01
Assumed Liabilities..................................   1.04-2
Cash Consideration Amount............................   1.04-1
Closing..............................................   1.08
Closing Date.........................................   1.08
Code.................................................   3.06-2
Contracts............................................   1.01-6
DDS..................................................   6.09
Damages..............................................   9.02-1
Dental Practice......................................   Introduction
Earnout Consideration................................   1.04-3
Earnout Period.......................................   1.04-3
EBITDA...............................................   1.04-3
ERISA................................................   3.06-2
ERISA Plans..........................................   3.06-2
Environmental Law....................................   3.24-2(a)
Excess Cap-ex Charge.................................   1.04-3
GD Sub...............................................   Introduction
GD Sub's Indemnified Persons.........................   9.02-1
GDSC.................................................   Introduction
Hazardous Substance..................................   3.24-2(b)
Leases...............................................   1.01-5
Material Adverse Change..............................   Article III Introduction
Material Adverse Effect..............................   Article III Introduction
Net Current Assets...................................   1.05-3
Orange...............................................   Introduction
Orange Assignable Option Agreement...................   Introduction
Orange Management Agreements.........................   Introduction
Orange's Indemnified Persons.........................   9.03-1
Partners.............................................   Introduction
PDS..................................................   Introduction
Permits..............................................   3.22
Policies.............................................   3.19
Prevailing Party.....................................   11.09
Professional Corporation.............................   Introduction
Purchase Price.......................................   1.04
Purchase Price Adjustment............................   1.05-1
Real Property........................................   3.15

                                       iv
<PAGE>
Related Documents....................................   9.01
Returns..............................................   3.20-1
Schwandt.............................................   Introduction
Tangible Personal Property...........................   1.01-2
Taxes................................................   3.20-3
Third Party Claims...................................   9.04-1(a)

                                       v
<PAGE>
                                LIST OF EXHIBITS

Exhibit                          Item                            First Reference
- -------                          ----                            ---------------

   A                       Assumption Agreement                      1.04-2
   B                       Assignment and Bill of Sale               1.05
   C                       Management Agreement                      6.06
   D                       Shares Acquisition Agreement              6.07
   E                       Dentist Employment Agreement              6.08



                                LIST OF SCHEDULES


         Schedule                                Content
         --------                                -------

         1.02-2                                  Excluded Assets
         1.09                                    Purchase Price Allocation
         3.04                                    Litigation
         3.06-2                                  Employee Benefits
         3.06-3                                  Employment Manuals and Policies
         3.06-4                                  Compensation
         3.12                                    Indebtedness
         3.13                                    Other Liabilities
         3.15                                    Leases
         3.16                                    Contracts
         3.19                                    Insurance
         3.22                                    Permits and Licenses
         3.25                                    Consents and Approvals

                                       vi
<PAGE>
                            ASSET PURCHASE AGREEMENT


DATED:            June 30, 1998


BETWEEN:          GENTLE DENTAL SERVICE CORPORATION,
                    a Washington corporation
                  900 Washington Street, Suite 1100
                  Vancouver, WA  98660
                  Telecopy No.:  (360) 750-8667                          "GDSC"


                  GENTLE DENTAL MANAGEMENT, INC.
                    a Delaware corporation
                  900 Washington Street, Suite 1100
                  Vancouver, WA 98660
                  Telecopy No.:  (360) 750-8667                        "GD Sub"


AND:              ORANGE DENTAL SERVICES
                  129 West Wilson Street, Suite 200
                  Costa Mesa, CA  92627
                  Telecopy No.:  (714) 646-1659                        "Orange"


AND:              Pacific Dental Services, Inc.
                    a California corporation ("PDS"),
                  and Bruce E. Schwandt, D.D.S. ("Schwandt")         "Partners"


     Partners are the owners of all of the partnership interests of Orange.
Orange provides management services to Orange Dental Office, the dental practice
located at 293 Main Street, Suite 210, Orange, California 92668 (the "Dental
Practice"). The Dental Practice is conducted by Bruce E. Schwandt, D.D.S., Inc.,
a California professional corporation (the "Professional Corporation"). Orange
is party to a management agreement with the Professional Corporation (the
"Orange Management Agreement"), and to an assignable option agreement with the
Professional Corporation and Schwandt, its sole shareholder (the "Orange
Assignable Option Agreement"). Orange desires to sell, and GD Sub desires to
purchase, substantially all of the assets associated with the Dental Practice on
the terms and conditions set forth in this Agreement.

     In consideration of the mutual promises and covenants contained in this
Agreement, the parties agree as follows:

<PAGE>
                                    ARTICLE I

                           Purchase and Sale of Assets

     1.01 Purchase and Sale. Subject to all the terms and conditions of this
Agreement and for the consideration herein stated, on the "Closing Date," as
that term is defined in Section 1.07, Orange agrees to sell, convey, assign,
transfer and deliver to GD Sub, and GD Sub agrees to purchase and accept from
Orange, all of the assets, properties and rights of Orange (other than the
assets specified in Section 1.02), tangible and intangible, wherever located,
that are used or useful to maintain and operate the Dental Practice, which
assets (the "Assets") shall include without limitation:

          1.01-1 All patient lists, operating data and records relating to the
Dental Practice, including without limitation financial, accounting and credit
records, correspondence, budgets, engineering and facility records and other
similar documents and records;

          1.01-2 All other items of tangible personal property of Orange used in
connection with or associated with the Dental Practice (the "Tangible Personal
Property"), including furniture, fixtures, equipment, supplies, inventory and
spare and replacement items therefor;

          1.01-3 All accounts receivable and other receivables of Orange
associated with the Dental Practice;

          1.01-4 All prepaid and deferred items of Orange relating to the Dental
Practice, including prepaid rent, insurance, taxes and unbilled charges and
deposits,

          1.01-5 All leases of real or personal property to which Orange is a
party as lessee and which relate to the Dental Practice, including without
limitation all leases listed on Schedule 3.15 and all leases entered into after
the date hereof and on or before the Closing Date and expressly assumed by GD
Sub in writing on the Closing Date as provided in Section 1.04-2(d), other than
to the extent such leases have terminated, expired or been disposed of by Orange
prior to the Closing Date without breach of this Agreement (collectively, the
"Leases");

          1.01-6 All rights, benefits and interests of Orange under the
contracts, agreements, commitments, understandings, purchase orders, documents
and instruments listed on Schedule 3.16 hereto, specifically including the
Orange Management Agreement and the Orange Assignable Option Agreement, and
under any contracts, agreements, commitments, understandings, purchase orders,
documents or instruments entered into between the date hereof and the Closing
Date and expressly assumed by GD Sub in writing on the Closing Date as provided
in Section 1.04-2(d), other than to the extent such items have terminated,
expired or been disposed of by Orange prior to the Closing Date without breach
of this Agreement (collectively, the "Contracts");

          1.01-7 All assignable rights to all telephone lines and numbers used
in the conduct of the Dental Practice; and

                                       2
<PAGE>
          1.01-8 All right, title and interest in and to trade names of Orange
associated with the Dental Practice.

     1.02 Excluded Assets. The Assets shall not include the following:

          1.02-1 Any lease not listed on Schedule 3.15 and any contract,
agreement, commitment, understanding, purchase order, document or instrument not
listed on Schedule 3.16, unless pursuant to Section 1.04-2(d) GD Sub expressly
agrees in writing on the Closing Date to assume the obligations under such
lease, contract, agreement, commitment, understanding, purchase order, document
or instrument, in which case Orange shall assign its rights and benefits
thereunder to GD Sub and the same shall be treated as a "Lease" or "Contract"
for purposes of this Agreement; and

          1.02-2 The assets identified on Schedule 1.02-2.

     1.03 Assumption of Liabilities. Except for the liabilities and obligations
to be assumed by GD Sub pursuant to Section 1.04-2, GD Sub will not assume and
will not be liable for any liabilities of Orange, known or unknown, contingent
or absolute, accrued or other, and the Assets shall be free of all liabilities,
obligations, liens and encumbrances. Without limiting the generality of the
foregoing and except as otherwise provided above, GD Sub will not be responsible
for any of the following:

          1.03-1 Liabilities, obligations or debts of Orange, whether fixed,
contingent or mixed and whether based on events occurring before or after the
Closing Date, including without limitation those based on tort, contract,
statutory or other claims or involving fines or penalties payable to any
governmental authority;

          1.03-2 Liabilities, obligations or debts of Orange for any federal,
state or local tax, including without limitation federal income taxes, state
income and excise taxes, state and local real and personal property taxes and
federal, state and local withholding and payroll taxes;

          1.03-3 Liabilities or obligations of Orange to employees for salaries,
bonuses or health and welfare benefits or with respect to any profit sharing,
stock bonus, pension, retirement, stock purchase, option, bonus or deferred
compensation plan or for any other benefits or compensation (including without
limitation accrued vacation or sick leave); and

          1.03-4 Liabilities or obligations of Orange for employee severance
payments or arrangements resulting from termination of Orange's employees.

     1.04 Purchase Price. The purchase price for the Assets (the "Purchase
Price") shall be the following:

          1.04-1 The Adjusted Cash Consideration Amount payable by check on the
Closing Date with $12,898 of such amount payable by check to Union Bank of
California for the payoff amount of Orange's loan from such Bank and the balance
payable by check to Orange. The "Cash Consideration Amount" equals $719,932. The
"Adjusted Cash Consideration Amount" shall

                                        3
<PAGE>
equal the Cash Consideration Amount reduced by the principal amount of any debt
or capital lease obligations of Orange assumed by GD Sub.

          1.04-2 The assumption by GD Sub on the Closing Date, pursuant to the
terms of an Assumption Agreement in substantially the form attached hereto as
Exhibit A, of the following liabilities of Orange (the "Assumed Liabilities"):

               1.04-2(a) the accounts payable and accrued payroll and benefits
liabilities of Orange associated with the Dental Practice as of March 31, 1998
(to the extent such liabilities are not paid or discharged prior to the Closing
Date);

               1.04-2(b) all liabilities of Orange associated with the Dental
Practice of a type identified in Section 1.04-2(a) and incurred in the ordinary
course of business after March 31, 1998 and on or before the Closing Date (to
the extent such liabilities are not paid or discharged prior to the Closing
Date), but specifically excluding any liabilities for brokers' and attorneys'
fees and other expenses of this transaction and accrued liabilities for taxes
based on the income or revenues of Orange;

               1.04-2(c) all obligations of Orange under any of the Leases or
Contracts listed on Schedule 3.15 or Schedule 3.16 hereto or under any of the
items listed under the heading "debt to be assumed" on Schedule 3.12; and

               1.04-2(d) all obligations of Orange under any lease, contract,
agreement, commitment, understanding, purchase order, document or instrument
entered into by Orange between the date of this Agreement and the Closing Date
that GD Sub, in its sole discretion, elects on the Closing Date to assume.

          1.04-3 Additional payments (the "Earnout Consideration") to be paid
based on the EBITDA (as defined below) for the 36-month period (the "Earnout
Period") beginning on the first day of the first calendar month following the
Closing Date. The first payment of Earnout Consideration shall equal 4.20
multiplied by the EBITDA for the first 12 months of the Earnout Period, reduced
by the Cash Consideration Amount. The second payment of Earnout Consideration
shall equal .90 multiplied by the EBITDA for the second 12 months of the Earnout
Period. The third payment of Earnout Consideration shall equal .90 multiplied by
the EBITDA for the third 12 months of the Earnout Period. The "EBITDA" shall
mean the combined net income of (a) the Professional Corporation and (b) GD Sub
from the provision of services to the Professional Corporation, before any
reduction for interest, income taxes, depreciation or amortization, and
excluding any allocation of GD Sub corporate overhead expense, but after the
Excess Cap-ex Charge (as defined below) and the Admin Charge (as defined below),
as reflected on a combined income statement for the practice location prepared
in conformity with generally accepted accounting principles applied in a manner
consistent with the application of such principles to the preparation of GD
Sub's audited financial statements. The "Excess Cap-ex Charge" shall be an
annual charge equal to 25% of the total accumulated capital expenditures by GD
Sub at the Dental Practice after the Closing Date which in any 12-month period
exceeds 2% of the net revenue of the Dental Practice for such period. The "Admin
Charge" shall equal a pro rata portion of the sum of (a) rent reimbursed by GD
Sub to PDS for the administrative office

                                        4
<PAGE>
acquired by GD Sub from PDS (the "Administrative Office"), and (b) all
unreimbursed costs incurred by GD Sub at the Administrative Office, including
but not limited to employee compensation and benefits, based on the ratio of the
net revenue of the Dental Practice to the combined net revenue of all dental
practices managed by GD Sub from the Administrative Office for the relevant
period. All payments of Earnout Consideration shall be paid by check. The
calculation and payment of each payment of Earnout Consideration shall be
completed within 90 days of the completion of the applicable 12-month portion of
the Earnout Period.

     1.05 Instruments of Conveyance and Transfer. The sale of the Assets, and
the conveyance, assignment, transfer and delivery of all of the Assets shall be
effected by Orange's execution and delivery to GD Sub, on the Closing Date, of a
bill of sale in substantially the form of the Assignment and Bill of Sale
attached hereto as Exhibit B.

     1.06 Further Assurances. Orange and Partners agree that, at any time and
from time to time on and after the Closing Date, they will, upon the request of
GD Sub and without further consideration, take all steps reasonably necessary to
place GD Sub in possession and operating control of the Assets and will do,
execute, acknowledge and deliver, or will cause to be done, executed,
acknowledged and delivered, all further acts, deeds, assignments, conveyances,
transfers, powers of attorney or assurances as reasonably required to sell,
assign, convey, transfer, grant, assure and confirm to GD Sub, or to aid and
assist in the collection of or reducing to possession by GD Sub of, all of the
Assets, or to vest in GD Sub good, valid and marketable title to the Assets.

     1.07 Closing. The consummation of the transactions contemplated by this
Agreement (the "Closing") shall take place at the offices of Stoel Rives LLP,
900 SW Fifth Avenue, Suite 2300, Portland, Oregon, at 10:00 a.m., Pacific time,
on June 30, 1998 or at another date, time and place agreed upon in writing by
the parties (the "Closing Date").

     1.08 Sales Tax. Orange shall pay any sales tax owing in respect of the
purchase of the Assets. Orange shall promptly file all necessary sales tax
returns, if any, and pay all sales taxes due, if any, following the Closing
Date.

     1.09 Allocation of Purchase Price. The Purchase Price shall be allocated
among the Assets in accordance with Schedule 1.09, and GDSC and Orange shall be
bound by that allocation in reporting the transactions contemplated by this
Agreement to any governmental authority (including without limitation the
Internal Revenue Service).

                                   ARTICLE II

                Representations and Warranties of GD Sub and GDSC

     GD Sub and GDSC, jointly and severally, represent and warrant to Orange as
follows:

     2.01 Authorization. Each of GD Sub and GDSC is a corporation duly
organized, validly existing and in good standing under the laws of the state of
its incorporation, with all requisite corporate power and authority to own and
operate its properties and to carry on its business as now

                                       5
<PAGE>
conducted. Each of GD Sub and GDSC has taken all corporate action necessary to
authorize its execution, delivery and performance of this Agreement. Each of GD
Sub and GDSC has full corporate power and authority to enter into this Agreement
and carry out the terms hereof. This Agreement has been duly executed and
delivered by GD Sub and GDSC and is binding upon and enforceable against each of
them in accordance with its terms, except as enforceability may be limited or
affected by applicable bankruptcy, insolvency, reorganization, or other laws of
general application relating to or affecting creditors' rights generally and
except as enforceability may be limited by rules of law governing specific
performance, injunctive relief or other equitable remedies.

     2.02 Compliance. The execution, delivery and performance of this Agreement
by GD Sub and GDSC, the compliance by GD Sub and GDSC with the provisions of
this Agreement and the consummation of the transactions described in this
Agreement will not conflict with or result in the breach of any of the terms or
provisions of or constitute a default under:

          2.02-1 the respective articles of incorporation or bylaws of GD Sub
and GDSC;

          2.02-2 any note, indenture, mortgage, deed of trust, loan agreement,
lease or other agreement or instrument to which GD Sub or GDSC is a party or by
which GD Sub or GDSC is bound; or

          2.02-3 any statute or any order, rule, regulation or decision of any
court or regulatory authority or governmental body applicable to GD Sub or GDSC.

     2.03 Consents. No consent, approval, authorization, order, designation or
declaration of any court or regulatory authority or governmental body, federal
or other, or third person is required to be obtained by GD Sub or GDSC for the
consummation of the transactions described in this Agreement.

     2.04 Accuracy of Representations & Warranties. None of the representations
or warranties of GD Sub or GDSC contains or will contain any untrue statement of
any material fact or omits or misstates a material fact necessary to make the
statements contained in this Agreement not misleading. Neither GD Sub nor GDSC
knows of any fact that has resulted or that, in the reasonable judgement of GD
Sub or GDSC will result, in any material adverse change in the business, results
of operation, financial condition or prospects of GD Sub or GDSC that has not
been set forth in this Agreement or in GDSC's filings with the Securities and
Exchange Commission.

                                   ARTICLE III

              Representations and Warranties of Orange and Partners

     As used in this Agreement, "Material Adverse Effect" means a material
adverse effect on the business, results of operations, financial position,
assets or prospects of Orange, the Dental Practice or any of them which shall in
any event include any adverse effect on the assets, revenue or net income of
Orange in excess of $15,000; and "Material Adverse Change" means any change that
has resulted,

                                       6
<PAGE>
will result or is likely to result in a Material Adverse Effect. Orange and
Partners represent and warrant to GD Sub as follows:

     3.01 Corporate Existence; Authority.

          3.01-1 The Partners have full power and authority to enter into this
Agreement and carry out its terms. PDS has taken all corporate action necessary
to authorize the execution, delivery and performance of this Agreement. This
Agreement has been duly and validly executed and delivered by the Partners and
is binding upon and enforceable against each Partner in accordance with its
terms, except as enforceability may be limited or affected by applicable
bankruptcy, insolvency, reorganization or other laws of general application
relating to or affecting the rights of creditors and except as enforceability
may be limited by rules of law governing specific performance, injunctive relief
or other equitable remedies. The Professional Corporation is a professional
corporation duly organized, validly existing and in good standing under the laws
of the State of California, and the Professional Corporation has all necessary
corporate power and authority to own, lease and operate its properties and
assets and to carry on its business as now conducted and as proposed to be
conducted.

          3.01-2 Orange is a partnership duly organized and validly existing
under the laws of California and has the power to own and lease its properties
and carry on its business as now being conducted. The Partners hold all of the
partnership interests of Orange and no person has any right to become a partner
of Orange or to acquire any interest in Orange. Orange has full power and
authority to enter into this Agreement and to carry out its terms. This
Agreement has been duly and validly executed and delivered by Orange and is
binding upon and enforceable against Orange in accordance with its terms, except
as enforceability may be limited or affected by applicable bankruptcy,
insolvency, reorganization or other laws of general application relating to or
affecting the rights of creditors and except as enforceability may be limited by
rules of law governing specific performance, injunctive relief or other
equitable remedies.

     3.02 No Adverse Consequences. Neither the execution and delivery of this
Agreement by Orange or Partners nor the consummation of the transactions
contemplated by this Agreement will

          3.02-1 result in the creation or imposition of any lien, charge or
encumbrance on any of Orange's or the Professional Corporation's assets or
properties,

          3.02-2 violate or conflict with any provision of Orange's
organizational documents,

          3.02-3 violate any law, judgment, order, injunction, decree, rule,
regulation or ruling of any governmental authority applicable to Orange,
Partners, the Professional Corporation or any of them, assuming that the
agreements to be entered into between GD Sub and the Professional Corporation do
not violate applicable laws, or

          3.02-4 either alone or with the giving of notice or the passage of
time or both, conflict with, constitute grounds for termination or acceleration
of, result in the breach of the terms, conditions or provisions of, result in
the loss of any benefit to Orange or the Professional Corporation under or

                                       7
<PAGE>
constitute a default under any agreement, instrument, license or permit to which
Orange, any Partner or any Professional Corporation is a party or by which any
of them is bound, assuming that the agreements to be entered into between GD Sub
and the Professional Corporation do not violate applicable laws.

     3.03 Brokers and Finders. Neither Orange nor any Partner has employed any
broker, finder or agent or dealt with anyone purporting to act in such capacity
or agreed to pay any brokerage fee, finder's fee or commission with respect to
the transaction contemplated by this Agreement.

     3.04 Litigation. Except as set forth on Schedule 3.04, there is no claim,
litigation, proceeding or investigation of any kind pending or threatened by or
against Orange, or the Professional Corporation and, to the best knowledge of
Orange, there is no basis for any such claim, litigation, proceeding or
investigation.

     3.05 Compliance with Laws. Except as set forth on Schedule 3.22, Orange and
the Professional Corporation have at all relevant times conducted their
businesses in compliance with their respective organizational documents and all
applicable laws and regulations. Except as set forth on Schedule 3.22, Orange
and the Professional Corporation are not in violation of any applicable laws or
regulations, other than violations which singly or in the aggregate do not, and,
with the passage of time will not, have a Material Adverse Effect. Neither
Orange nor the Professional Corporation is subject to any outstanding order,
writ, injunction or decree, and neither Orange nor the Professional Corporation
has been charged with, or threatened with a charge of, a violation of any
provision of federal, state or local law or regulation.

     3.06 Employment Matters.

          3.06-1 Labor Matters.

               (a) Neither Orange nor the Professional Corporation is a party or
otherwise subject to any collective bargaining or other agreement governing the
wages, hours or terms of employment of its employees. Orange and the
Professional Corporation are and have been in compliance with all applicable
laws regarding employment and employment practices, terms and conditions of
employment, wages and hours and are not and have not been engaged in any unfair
labor practice.

               (b) There is no (1) unfair labor practice complaint against
Orange or the Professional Corporation pending before the National Labor
Relations Board or any other governmental authority, (2) labor strike, slowdown
or work stoppage actually occurring or, to the best of the knowledge of Orange
threatened against either of them, (3) representation petition respecting any of
their employees pending before the National Labor Relations Board, or (4)
grievance or any arbitration proceeding pending arising out of or under
collective bargaining agreements applicable to any of them.

               (c) Neither Orange nor the Professional Corporation has
experienced any primary work stoppage or other organized work stoppage involving
its employees in the past two years.

                                       8
<PAGE>
          3.06-2 Employee Benefits. Schedule 3.06-2 lists all pension,
retirement, profit sharing, deferred compensation, bonus, commission, incentive,
life insurance, health and disability insurance, hospitalization and all other
employee benefit plans or arrangements (including, without limitation, any
contracts or agreements with trustees, insurance companies or others relating to
any such employee benefit plans or arrangements) established or maintained by
Orange and complete and accurate copies of all those plans or arrangements have
been provided to GD Sub. The employee pension benefit plans (within the meaning
of Section 3(2) of the Employee Retirement Income Security Act of 1974, as
amended ("ERISA")) established and maintained by Orange that are subject to
ERISA are listed separately as ERISA Plans on Schedule 3.06-2 (the "ERISA
Plans"). The ERISA Plans comply with the applicable requirements of ERISA.
Orange has received from the Internal Revenue Service a favorable determination
for each of the ERISA Plans and their related trusts that each of the ERISA
Plans is qualified under Section 401(a) of the Internal Revenue Code of 1986, as
amended (the "Code") and the related trust is tax-exempt under Section 501(a) of
the Code. There has been no event subsequent to that determination that has
adversely affected the tax qualified status of the ERISA Plans or the exemption
of the related trusts other than changes in the Code that are not effective as
of the Closing Date. No "accumulated funding deficiency" as defined in Section
302(a)(2) of ERISA or Section 412(a) of the Code exists, or has existed, with
respect to any of the ERISA Plans. The present value of all accrued benefits
under each of the ERISA Plans does not exceed the value of such plan's assets,
less all liabilities other than those attributable to accrued benefits. Orange
has no "potential withdrawal liability," as defined in Section 4201 of ERISA.
None of the ERISA Plans, its related trusts or any trustee, investment manager
or administrator thereof has engaged in a nonexempt "prohibited transaction," as
such term is defined in Section 406 of ERISA and Section 4975 of the Code. There
are not and have not been any excess deferrals or excess contributions under any
ERISA Plan. Each ERISA Plan is and has been operated and administered in
conformance with the requirements of all applicable laws and regulations,
whether or not the ERISA Plan documents have been amended to reflect such
requirements. Orange has no obligation of any kind (whether under the terms of
the ERISA Plans or under any understanding with employees) to make payments
under, or to pay contributions to or in respect of, any plan or arrangement
listed on Schedule 3.06-2, or any other plan, agreement or other arrangement for
deferred compensation of employees, whether or not tax qualified, including,
without limitation, a single employer tax qualified plan, a tax qualified plan
of a controlled group of corporations, a multi-employer pension plan, a
nonqualified deferred compensation plan, an individual employment or
compensation agreement or a commitment to provide medical benefits to retirees.

          3.06-3 Employment Agreements. Each of the employees of Orange and the
Professional Corporation is an "at-will" employee and, except as listed on
Schedule 3.06-3, there are no written employment, commission or compensation
agreements of any kind between Orange or the Professional Corporation and any of
their respective employees. Schedule 3.06-3 lists and includes all of Orange's
employment or supervisory manuals, employment or supervisory policies, and
written information generally provided to employees (such as applications or
notices), and true and complete copies of those manuals, policies and written
information have been provided to GD Sub. Orange does not have any agreements or
understandings with Orange's employees except as reflected in the items listed
in Schedules 3.06-2 and 3.06-3.

                                       9
<PAGE>
          3.06-4 Compensation. Schedule 3.06-4 contains a complete and accurate
list of all employees of Orange, as of June 29, 1998, specifying their names,
hire dates, the total amount paid or payable as compensation to each such
person, and the basis of such compensation.

     3.07 [Reserved]

     3.08 [Reserved]

     3.09 [Reserved]

     3.10 [Reserved]

     3.11 [Reserved]

     3.12 Indebtedness. Schedule 3.12 lists all indebtedness of Orange and the
Professional Corporation as of June 30, 1998 incurred in connection with the
business, operations or assets of the Dental Practice or the repayment of which
is secured by the assets of the Dental Practice. For each item of indebtedness,
Schedule 3.12 shows the name of lender and the principal balance.

     3.13 Other Liabilities. Except as listed on Schedule 3.13, neither Orange
nor the Professional Corporation has any liability or obligation (whether
absolute, accrued, contingent or other, and whether due or to become due), which
is not accrued, reserved against or disclosed in the Current Balance Sheet,
other than liabilities incurred in the ordinary course of business consistent
with past practice, which individually or in the aggregate would not have a
Material Adverse Effect.

     3.14 Absence of Certain Changes or Events. Since March 31, 1998, there has
not been with respect to Orange or the Dental Practice:

          3.14-1 Any Material Adverse Change or any event, occurrence,
development or state of circumstances or facts which could reasonably be
expected to result in a Material Adverse Change;

          3.14-2 Any damage, destruction or casualty loss, whether insured
against or not, to any assets or properties associated with the Dental Practice;

          3.14-3 Any increase in the rate or terms of compensation payable or to
become payable by Orange to its key employees; any increase in the rate or terms
of any bonus, insurance, pension or other employee benefit plan, payment or
arrangement made to, for or with any such key employees; any special bonus or
remuneration paid; or any written employment contract executed or amended;

                                       10
<PAGE>
          3.14-4 Any entry into any agreement, commitment or transaction
(including, without limitation, any borrowing, capital expenditure or capital
financing or any amendment, modification or termination of any existing
agreement, commitment or transaction) by Orange or the Professional Corporation,
except agreements, commitments or transactions in the ordinary course of
business and consistent with past practices or as expressly contemplated in this
Agreement;

          3.14-5 Any conduct of business which is outside the ordinary course of
business or not substantially in the manner that Orange previously provided
management services to the Dental Practice;

          3.14-6 Any purchase or other acquisition of property, any sale, lease
or other disposition of property, or any expenditure, except in the ordinary
course of business;

          3.14-7 Any incurrence of any noncontract liability which, either
singly or in the aggregate is material to the business, results of operations,
financial condition or prospects of the Dental Practice;

          3.14-8 Any encumbrance or consent to encumbrance of any property or
assets of Orange except in the ordinary course of business; or

          3.14-9 Any change in the assets, liabilities, licenses, permits or
franchises of Orange, or in any agreement to which Orange is a party or is
bound, which has had or reasonably could be expected to have a Material Adverse
Effect.

     3.15 Leases. Schedule 3.15 contains a complete and accurate list of all
Leases of real property used or useful in the business of Orange, including the
lease at the Dental Practice location, a description of the real property
covered thereby (the "Real Property"), the term of each Lease and the monthly
payments under the Lease. Complete and accurate copies of all Leases have been
delivered to GD Sub.

     3.16 Certain Contracts and Arrangements. Schedule 3.16, which is organized
by type of agreement, contains a complete and accurate list of all Contracts of
the following types to which Orange or the Professional Corporation is a party
or by which Orange or the Professional Corporation is bound which relate to or
are associated with the Dental Practice:

          3.16-1 any mortgage, note or other instrument or agreement relating to
the borrowing of money or the incurrence of indebtedness by Orange or the
Professional Corporation or Orange's guaranty of any obligation for the
borrowing of money;

          3.16-2 contracts, agreements, purchase orders or acknowledgment forms
for the purchase, sale, lease or other disposition of capital assets or more
than $20,000 of other equipment or materials;

                                       11
<PAGE>
          3.16-3 contracts or agreements for the performance of services,
including but not limited to the Orange Management Agreement;

          3.16-4 contracts or agreements for the joint performance of work or
services and all other partnership or joint venture agreements;

          3.16-5 contracts or agreements with agents, brokers, consignees, sales
representatives or distributors relating to the sale of the services of Orange;
and

          3.16-6 any other contract, instrument, agreement or obligation not
described on any other Schedule to which Orange or the Professional Corporation
is a party or by which either of them is bound and which contains material
unfulfilled obligations of Orange, including but not limited to the Orange
Assignable Option Agreement.

Complete and accurate copies of all Contracts have been delivered to GD Sub.

     3.17 Status of Contracts and Leases.

          3.17-1 Each of the Contracts and Leases listed on Schedules 3.15 and
3.16 is valid, binding and enforceable by Orange in accordance with its terms
and is in full force and effect. There is no existing default or violation by
Orange under any Contract or Lease and no event has occurred which (whether with
or without notice, lapse of time or both) would constitute a default of Orange
under any Contract or Lease. There is no pending or threatened proceeding which
would interfere with the quiet enjoyment of any Real Property of which Orange is
lessee or sublessee which is used by the Dental Practice.

          3.17-2 All other parties to the Contracts and Leases have consented or
prior to the Closing will have consented (where such consent is necessary) to
the consummation of the transaction contemplated by this Agreement without
requiring modification of Orange's rights or obligations under any Contract or
Lease.

          3.17-3 Orange is not aware of any default by any other party to any
Contract or Lease or of any event which (whether with or without notice, lapse
of time or both) would constitute a default by any other party with respect to
obligations of that party under any Contract or Lease, and, to the knowledge of
Orange, there are no facts that exist indicating that any of the Contracts or
Leases may be totally or partially terminated or suspended by the other parties.

          3.17-4 Neither Orange nor the Professional Corporation is a party to,
nor is it bound by, any contract or agreement that Orange can reasonably foresee
will result in any material loss to Orange or the Dental Practice upon the
performance thereof (including any material liability for penalties or damages,
whether liquidated, direct, indirect, incidental or consequential), unless such
contract or agreement is terminable by Orange or the Professional Corporation on
60 or fewer days notice at any time without penalty.

                                       12
<PAGE>
     3.18 Title and Condition of Tangible Assets.

          3.18-1 Orange owns all of the Tangible Personal Property except the
leased property free and clear of all mortgages, pledges, security interests,
claims, charges or other encumbrances or restrictions of any kind, except

               (a) liens disclosed on the Current Balance Sheet,

               (b) security interests or liens securing payment of Assumed
Liabilities or

               (c) liens for taxes not yet due or being contested in good faith
(and for which adequate accruals or reserves have been established on the
Current Balance Sheet).

          3.18-2 Orange has good and absolute title to the Tangible Personal
Property except the leased property. No Partner, Professional Corporation or
shareholder thereof, nor any other person or entity has any interest in any
property, real or personal, tangible or intangible, used in or pertaining to the
Dental Practice, other than indirectly as a partner of Orange. The immediately
preceding sentence shall not apply to patient charts, files and patient records
and contracts for the provision of dentistry services that may be owned or held
by the Professional Corporation.

          3.18-3 All Tangible Personal Property has been maintained and operated
in accordance with manufacturer's specifications and prudent industry practices,
is in a good state of maintenance and repair, ordinary wear and tear excepted,
and is adequate for the conduct of Orange's business.

          3.18-4 There are no developments affecting any of the Real Property or
Tangible Personal Property pending or, to the knowledge of Orange, threatened
which might materially detract from the value of such property or assets,
materially interfere with any present or intended use of any such property or
assets or materially adversely affect the marketability of such properties or
assets.

          3.18-5 At the Closing, GD Sub will acquire good title to all the
Assets, free and clear of all mortgages, pledges, security interests, claims,
charges or other encumbrances or restrictions of any kind, except for security
interests or liens securing payment of Assumed Liabilities.

     3.19 Insurance. Schedule 3.19 contains a complete and accurate list of all
policies (other than the malpractice insurance policy in effect for the
Professional Corporation) of liability, fire, worker's compensation and other
forms of insurance insuring Orange, the Professional Corporation, their
respective employees, and assets or operations of the Dental Practice, setting
forth the applicable deductible amounts (all of the foregoing policies including
the malpractice insurance policy of the Professional Corporation are hereinafter
collectively defined as the

                                       13
<PAGE>
"Policies"). All the Policies are valid, enforceable and in full force and
effect, all premiums with respect to the Policies covering all periods up to and
including the date as of which this representation is being made have been paid
and no notice of cancellation or termination has been received with respect to
any Policy. The Policies are sufficient for compliance with all requirements of
law and of agreements to which Orange and the Professional Corporation are
parties and provide insurance for the risks and in the amounts and types of
coverage usually obtained by persons using or holding similar properties in
similar businesses. There are no unresolved claims for insurance payment under
any of the Policies. True and complete copies of the Policies and all
endorsements thereto have been delivered to GD Sub.

     3.20 Taxes.

          3.20-1 Returns. Orange has filed all federal, state and other returns,
reports and information returns required to be filed by it with respect to Taxes
(as defined below) (collectively, the "Returns") and has timely paid all Taxes
shown to be due on the Returns. All Returns filed are complete and accurate in
all material respects, and no additional Taxes are owed by Orange with respect
to the periods covered by the Returns. Orange has provided GD Sub with complete
and accurate copies of Orange's Returns for 1995 and 1996.

          3.20-2 Taxes Paid or Reserved. All deficiencies in Taxes asserted or
assessments made by any taxing authority have been fully paid or finally
settled, excluding property taxes that are not yet due. All Taxes which Orange
or the Professional Corporation has been required to collect or withhold have
been withheld or collected and, to the extent required, have been paid to the
proper taxing authority.

          3.20-3 Definition. "Taxes" means all taxes, charges, fees, levies or
other assessments including, without limitation, income, excise, property,
sales, use and franchise taxes, imposed by the United States or any state,
county, local or foreign government or subdivision or agency thereof, and
including any interest, penalties or additions.

     3.21 No Restrictions. No contract or agreement to which Orange is a party
or is bound or to which any of its properties or assets is subject limits the
freedom of Orange to compete in any line of business or with any person.

     3.22 Permits and Licenses. Except as set forth on Schedule 3.22, Orange,
the Professional Corporation and Schwandt hold and at all times have held, all
licenses, permits, franchises, easements and authorizations (collectively,
"Permits") necessary for the lawful conduct of the Dental Practice pursuant to
all applicable statutes, laws, ordinances, rules and regulations of all
governmental bodies, agencies and other authorities having jurisdiction over it
or any part of its operations, except where the failure to hold any Permit,
singly or in the aggregate, either alone or with the giving of notice or the
passage of time or both, would not have a Material Adverse Effect. Orange, the
Professional Corporation and Schwandt are in compliance with all the terms of
each Permit, and there are no claims of violation by any such party of any
Permit.

                                       14
<PAGE>
     3.23 Certain Payments. Neither Orange nor the Professional Corporation or
any Partner, directly or indirectly, on behalf of or with respect to the Dental
Practice or its operations made or received any payment that was not legal to
make or receive under federal, state or local laws of the United States or any
other country or territory.

     3.24 Environmental Conditions.

          3.24-1 Compliance. Orange has operated the Dental Practice and
maintained the Assets, including without limitation the Real Property, in
compliance with all Environmental Laws. All wastes generated in connection with
the Dental Practice are and have been transported and disposed of off site in
compliance with all Environmental Laws. Except as otherwise required for the
normal operation of the Dental Practice, no Hazardous Substance is or has been
generated, manufactured, treated, stored, transported, used or otherwise handled
on the Real Property or in connection with the Dental Practice.

          3.24-2 Definitions. As used in this Agreement,

               (a) "Environmental Law" means any federal, state or local
statute, ordinance or regulation pertaining to the protection of human health or
the environment and any applicable orders, judgments, decrees, permits, licenses
or other authorizations or mandates under such statutes, ordinances or
regulations, and

               (b) "Hazardous Substance" means any hazardous, toxic, radioactive
or infectious substance, material or waste as defined, listed or regulated under
any Environmental Law, and includes without limitation petroleum oil and its
fractions.

     3.25 Consents and Approvals. Except as set forth on Schedule 3.25, no
consent, approval or authorization of any court, regulatory authority,
governmental body, or any other entity or person not a party to this Agreement
is required for the consummation of the transactions described in this Agreement
by Orange or Partners. Orange and Partners have obtained, or shall have obtained
prior to the Closing, all consents, authorizations or approvals of any third
parties required in connection with the execution, delivery or performance of
this Agreement by Orange or Partners or the consummation of the transaction
contemplated by this Agreement. Orange has made all registrations or filings
with any governmental authority required for the execution or delivery of this
Agreement or the consummation of the transaction contemplated hereby.

     3.26 Records. The books of account of Orange and the Professional
Corporation are complete and accurate in all material respects, and there have
been no transactions involving the business of Orange and the Professional
Corporation which properly should have been set forth therein and which have not
been accurately so set forth. Complete and accurate copies of such books have
been made available to GD Sub.

                                       15
<PAGE>
     3.27 Reliance. Orange and Partners recognize and agree that,
notwithstanding any investigation by GD Sub, GD Sub is relying upon the
representations and warranties made by Orange and Partners in this Agreement.

     3.28 Accuracy of Representations and Warranties. None of the
representations or warranties of Orange and Partners contains or will contain
any untrue statement of any material fact or omits or misstates a material fact
necessary to make the statements contained in this Agreement not misleading.
Orange and Partners do not know of any fact that has resulted or that, in the
reasonable judgment of Orange or Partners will result, in any material adverse
change in Orange's business, results of operation, financial condition or
prospects that has not been set forth in this Agreement.

                                   ARTICLE IV

                        Covenants of Orange and Partners

     4.01 Access to Properties, Books and Records. Prior to the Closing Date,
Orange shall, at GD Sub's request, afford or cause to be afforded to the agents,
attorneys, accountants and other authorized representatives of GD Sub reasonable
access during normal business hours to all employees, properties, books and
records of Orange and the Professional Corporation and shall permit such
persons, at GD Sub's expense, to make copies of such books and records. Orange
shall deliver to GD Sub monthly financial statements of Orange promptly after
they become available. GDSC and GD Sub shall treat, and shall cause all of their
agents, attorneys, accountants and other authorized representatives to treat,
all information obtained pursuant to this Section 4.01 as confidential in
accordance with Section 10.01 hereof. No investigation by GDSC or GD Sub or any
of their authorized representatives pursuant to this Section 4.01 shall affect
any representation, warranty or closing condition of any party hereto or GD
Sub's rights to indemnification pursuant to Section 9.02 hereof.

     4.02 Negative Covenants. Except as otherwise permitted by this Agreement or
with the prior written consent of GD Sub, prior to the Closing Date, Orange
shall not, in connection with the Dental Practice:

          4.02-1 Incur additional debt for borrowed money (including without
limitation obligations under leases for real or personal property whether or not
required to be capitalized under generally accepted accounting principles),
incur or increase any obligation or liability (fixed, contingent or other,
including without limitation liabilities as a guarantor or otherwise with
respect to obligations of others) except in the ordinary and usual course of
business and consistent with past practices, forgive or release any debt or
claim, give any waiver of any right of material value or voluntarily suffer any
extraordinary loss;

          4.02-2 Make any payment to discharge or satisfy any lien or
encumbrance or pay any obligation or liability (fixed or contingent) other than
(a) current liabilities (including the

                                       16
<PAGE>
current portion of any long-term liabilities) included in the Financial
Statements and (b) current liabilities incurred or maturing since the date of
the Current Balance Sheet in the ordinary course of business;

          4.02-3 Admit any new or additional partner or declare, pay or make any
distribution of money or property to the Partners other than ordinary
distributions consistent with past practices;

          4.02-4 Mortgage, pledge, otherwise encumber or subject to lien any of
its assets or properties, tangible or intangible, or commit itself to do any of
the foregoing;

          4.02-5 Except in the ordinary and usual course of its business and in
each case for fair consideration, dispose of, or agree to dispose of, any of its
assets or lease or license to others, or agree so to lease or license, any of
its assets;

          4.02-6 Acquire any assets which would be material to the Dental
Practice other than assets acquired in the ordinary and usual course of business
and consistent with past practices;

          4.02-7 Enter into any transaction or contract or make any commitment
to do the same, except in the ordinary and usual course of business and not
requiring the payment in any case of an amount in excess of $15,000 annually;

          4.02-8 Increase the wages, salaries, compensation, pension or other
benefits payable, or to become payable by it, to any of its employees or agents,
including without limitation any bonus payments or severance or termination pay,
other than increases in wages and salaries required by employment arrangements
existing on the date hereof or otherwise in the ordinary and usual course of its
business;

          4.02-9 Implement or agree to any implementation of or amendment or
supplement to any employee profit sharing, pension, bonus, commission,
incentive, retirement, medical reimbursement, life insurance, deferred
compensation or any other employee benefit plan or arrangement;

          4.02-10 Change its accounting methods, policies or practices; or

          4.02-11 Agree or commit to do any of the foregoing.

     4.03 Affirmative Covenants. Except as otherwise permitted by this Agreement
or with the prior written consent of GD Sub, prior to the Closing Date, Orange
shall:

          4.03-1 Operate the Dental Practice, including collecting receivables
and paying payables, as presently operated and only in the ordinary course and
consistent with past practices;

                                       17
<PAGE>
          4.03-2 Advise GD Sub in writing of any litigation or administrative
proceeding that challenges or otherwise materially affects the transactions
contemplated hereby and of any Material Adverse Change or any event, occurrence
or circumstance which is likely to cause a Material Adverse Change;

          4.03-3 When the consent of any third party to the transactions
contemplated by this Agreement is required under the terms of any contract or
agreement material to the Dental Practice to which Orange is a party or by which
Orange is bound, use its best efforts to obtain such consent on terms and
conditions not materially less favorable than those in effect on the date
hereof;

          4.03-4 Use its best efforts to maintain all of the Tangible Personal
Property in good operating condition, reasonable wear and tear excepted,
consistent with past practices, and take all steps reasonably necessary to
maintain its intangible assets;

          4.03-5 Not cancel or change any policy of insurance (including
self-insurance) or fidelity bond or any policy or bond providing substantially
the same coverage;

          4.03-6 Maintain, consistent with past practices, all inventories,
spare parts, office supplies and other expendable items;

          4.03-7 Use its best efforts to retain all employees;

          4.03-8 Maintain its books and records in accordance with past
practices;

          4.03-9 Pay and discharge all taxes, assessments, governmental charges
and levies imposed upon it, its income or profits or upon any property belonging
to it, in all cases prior to the date on which penalties attach thereto; and

          4.03-10 Comply with all laws, rules and regulations applicable to it
and to the Dental Practice.

     4.04 No Negotiations With Others. Except as otherwise permitted by this
Agreement or with the prior written consent of GD Sub, Orange and Partners shall
refrain, and shall cause Orange's employees and any investment banker, attorney,
accountant or other agent retained by either of them to refrain, from initiating
or soliciting any inquiries or making any proposals with respect to, or engaging
in negotiations concerning, or providing any confidential information or data to
or having any discussions with any person relating to, any acquisition, business
combination or purchase of all or any significant portion of the assets of, or
any equity interest in, Orange. Orange and Partners will immediately cease and
cause to be terminated any existing activities, discussions or negotiations with
any parties conducted heretofore with respect to any of the foregoing.

                                       18
<PAGE>
     4.05 Employees. Effective as of the close of business on the Closing Date,
Orange shall terminate all of its employees at the Dental Practice. Except as
expressly assumed by GD Sub under this Agreement, Orange shall be responsible
for and shall pay and discharge all obligations to such employees arising out of
or in connection with their employment prior to Closing.

     4.06 Offset of Notes. Schwandt is currently indebted to PDS under an
Original NonNegotiable Secured Promissory Note dated July 1, 1996, as amended
September 1, 1997, and PDS is currently indebted to Schwandt under a
Non-Negotiable Secured Promissory Note dated September 1, 1997. Schwandt and PDS
agree that effective as of the Closing, these two notes will be offset and the
net amount due from Schwandt to PDS shall be immediately due and payable.

                                    ARTICLE V

                                 Joint Covenants

     GD Sub, Orange and Partners covenant and agree that they will act in
accordance with the following:

     5.01 Governmental Consents. Promptly following the execution of this
Agreement, the parties will proceed to prepare and file with the appropriate
governmental authorities any requests for approval or waiver, if any, that are
required from governmental authorities in connection with the transactions
contemplated hereby, and the parties shall diligently and expeditiously
prosecute and cooperate fully in the prosecution of such requests for approval
or waiver and all proceedings necessary to secure such approvals and waivers.

     5.02 Best Efforts; No Inconsistent Action. Each party will use its best
efforts to effect the transactions contemplated by this Agreement and to fulfill
the conditions to the obligations of the other parties set forth in Article 6 or
7 of this Agreement. No party will take any action inconsistent with its
obligations under this Agreement or that could hinder or delay the consummation
of the transactions contemplated by this Agreement, except that nothing in this
Section 5.02 shall limit the rights of the parties under Articles 6, 7 and 8.

                                   ARTICLE VI

                       Conditions to Obligations of GD Sub

     The obligations of GD Sub under Article 1 are, at its option, subject to
satisfaction, at or prior to the Closing, of each of the following conditions:

     6.01 Governmental Approvals. All authorizations, consents and approvals of
all governmental agencies and authorities required to be obtained in order to
permit consummation

                                       19
<PAGE>
of the transactions contemplated by this Agreement shall have been obtained and
be satisfactory in form and content to GD Sub.

     6.02 Consents. Orange shall have obtained the third-party consents required
under the terms of the Contracts and Leases, except for those Contracts and
Leases for which the necessity of obtaining consent to assignment is waived by
GD Sub as indicated in Schedule 3.25, and such consents shall not have required
any change to the terms and conditions of the Contracts and Leases other than
changes consented to in writing by GD Sub.

     6.03 Representations, Warranties and Covenants.

          6.03-1 All representations and warranties of Orange and Partners made
in this Agreement, or in any certificate delivered pursuant hereto, shall in all
material respects be true and complete on and as of the Closing Date with the
same force and effect as if made on and as of that date.

          6.03-2 All of the terms, covenants and conditions to be complied with
and performed by Orange and Partners at or prior to the Closing shall in all
material respects have been complied with or performed thereby.

          6.03-3 GD Sub shall have received a certificate of Partners, dated as
of the Closing Date, to the effect that the representations and warranties of
Orange and Partners contained in this Agreement are in all material respects
true and complete on and as of the Closing Date as though made on and as of the
Closing Date and that Orange and Partners have in all material respects complied
with or performed all terms, covenants and conditions to be complied with or
performed by him at or prior to the Closing.

     6.04 Adverse Proceedings. No suit, action, claim or governmental proceeding
shall have been instituted or threatened against, and no order, decree or
judgment of any court, agency or other governmental authority shall have been
rendered against, GDSC, GD Sub, Orange or either Partner to restrain or
prohibit, or obtain damages in respect of, this Agreement or the transactions
contemplated by this Agreement.

     6.05 No Adverse Change. There shall not have been any Material Adverse
Change.

     6.06 Management Agreement. The Orange Management Agreement assigned by
Orange to GD Sub pursuant to Section 1.01-6 shall have been amended and restated
as a Management Agreement with GD Sub in the form attached hereto as Exhibit C,
and the Professional Corporation shall have executed and delivered such a
Management Agreement.

     6.07 Shares Acquisition Agreement. The Orange Assignable Option Agreement
assigned by Orange to GD Sub pursuant to Section 1.01-6 shall have been amended
and restated as a Shares Acquisition Agreement relating to the stock of the
Professional Corporation in the

                                       20
<PAGE>
form attached hereto as Exhibit D, and the Professional Corporation and Schwandt
shall have executed and delivered such Shares Acquisition Agreement.

     6.08 Dentist Employment Agreements. Schwandt shall have executed and
delivered a Dentist Employment Agreement with the Professional Corporation in
the form attached hereto as Exhibit E.

     6.09 Closing and Signing of Related Transactions. The transactions
contemplated by the following agreements shall close simultaneously with the
Closing: Asset Purchase Agreement dated June 30, 1998 by and among GDSC, GD Sub,
PDS and the shareholders of PDS; and Asset Purchase Agreement dated June 30,
1998 by and among GDSC, GD Sub and Bryan Watanabe D.D.S., Inc. All parties shall
have executed and delivered the Asset Purchase Agreement dated June 30, 1998 by
and among GDSC, GD Sub, TG3 Dental Services and the partners of TG3 Dental
Services.

     6.10 Actions Satisfactory to GD Sub's Counsel. All actions, proceedings,
instruments and documents required to be carried out by this Agreement, or
incidental hereto, and all other relevant legal matters shall be reasonably
satisfactory to counsel for GD Sub.

                                   ARTICLE VII

                       Conditions to Obligations of Orange

     The obligations of Orange under Article I are, at its option, subject to
satisfaction, at or prior to the Closing, of each of the following conditions:

     7.01 Representations, Warranties and Covenants.

          7.01-1 All representations and warranties of GDSC and GD Sub made in
this Agreement and in any certificate delivered pursuant hereto shall in all
material respects be true and complete on and as of the Closing Date with the
same force and effect as if made on and as of that date.

          7.01-2 All of the terms, covenants and conditions to be complied with
and performed by GDSC and GD Sub on or prior to the Closing shall in all
material respects have been complied with or performed by GDSC and GD Sub.

          7.01-3 Orange shall have received a Certificate of GDSC and GD Sub,
dated as of the Closing Date, executed by the President or other authorized
officer of GDSC and GD Sub, to the effect that the representations and
warranties of GDSC and GD Sub contained in this Agreement are in all material
respects true and complete on and as of the Closing Date as though made on and
as of the Closing Date and that GDSC and GD Sub have in all material respects

                                       21
<PAGE>
complied with or performed all terms, covenants and conditions to be complied
with or performed by them at or prior to the Closing.

     7.02 Adverse Proceedings. No suit, action, claim or governmental proceeding
shall have been instituted or threatened against, and no order, decree or
judgment of any court, agency or other governmental authority shall have been
rendered against, GDSC, GD Sub, Orange or any Partner to restrain or prohibit
this Agreement or the transactions contemplated by this Agreement.

                                  ARTICLE VIII

                                   Termination

     8.01 Right of Parties to Terminate. This Agreement may be terminated:

          8.01-1 by GD Sub, if any of the authorizations, consents, approvals,
filings or registrations described in Section 6.01 hereof, other than as may
pertain to those Contracts and Leases for which the necessity of obtaining
consent to assignment is waived by GD Sub as indicated on Schedule 3.25, shall
have been denied, not permitted to go into effect or obtained on terms not
reasonably satisfactory to GD Sub and all reasonable final appeals shall have
been exhausted;

          8.01-2 by GD Sub, if Orange or Partners shall have breached any of
their obligations hereunder in any material respect;

          8.01-3 by Orange, if GD Sub shall have breached any of its obligations
hereunder in any material respect; or

          8.01-4 by either Orange or GD Sub, by written notice to the other
party, if the Closing shall not have occurred on or prior to March 31, 1999;
provided, however, that the right to terminate this Agreement under this Section
8.01-4 shall not be available to any party whose failure to fulfill or perform
any obligation under this Agreement has been the cause of, or resulted in, the
failure of the Closing to occur on or before such date.

     8.02 Effect of Termination. If either GD Sub or Orange decides to terminate
this Agreement pursuant to Section 8.01, such party shall promptly give written
notice to the other party to this Agreement of such decision. In the event of a
termination pursuant to Section 8.01, the parties hereto shall be released from
all liabilities and obligations arising under this Agreement (other than those
described in Article 10 hereof) with respect to the matters contemplated by this
Agreement, other than for damages arising from a breach of this Agreement.

                                       22
<PAGE>
                                   ARTICLE IX

                            Survival; Indemnification

     9.01 Survival. All representations, warranties, covenants and agreements
made in this Agreement or in any schedule, certificate or assignment delivered
in accordance with this Agreement (collectively, the "Related Documents") shall
survive any investigation by or on behalf of any party, the execution and
delivery of this Agreement, the consummation of the transactions contemplated
hereby and any termination or expiration of this Agreement for a period of three
and one-half years following the Closing Date and after such period shall be
terminated and extinguished, except insofar as the damaged party shall have
asserted in writing a claim setting forth with reasonable specificity facts and
circumstances relating thereto prior to the expiration of such period in which
event the party liable shall remain liable with respect to such claim.

     9.02 Indemnification by Orange and Partners.

          9.02-1 Notwithstanding any investigation by GDSC or GD Sub, from and
after the Closing, Orange and Partners shall indemnify, hold harmless and, to
the extent provided in Section 9.04-1, defend GDSC, GD Sub, and their respective
subsidiaries, shareholders, affiliates, officers, directors, employees, agents,
successors and assigns (collectively, "GD Sub's Indemnified Persons") from and
against, and reimburse each of GD Sub's Indemnified Persons with respect to, any
and all losses, damages, liabilities, costs and expenses, including interest
from the date of such loss to the time of payment, penalties and reasonable
attorneys' fees (collectively, "Damages") incurred by any of GD Sub's
Indemnified Persons by reason of or arising out of or in connection with:

               (a) any material breach or inaccuracy of any representation or
warranty of Orange or Partners made in this Agreement or any Related Document;

               (b) any failure by Orange or Partners to perform any covenant
required to be performed by them pursuant to this Agreement or any Related
Document after reasonable opportunity to cure; or

               (c) any liability or obligation of Orange or Partners arising out
of or in connection with the ownership, use, condition, maintenance or operation
of the Dental Practice or the Assets by Orange on or prior to the Closing, in
either case not expressly assumed by GD Sub in accordance with the terms of this
Agreement, and specifically including any liability to pay cash to a terminated
employee on account of accrued vacation time.

          9.02-2 This indemnification extends to any Damages suffered by any of
GD Sub's Indemnified Persons, whether or not a claim is made against any of GD
Sub's Indemnified Persons by any third party.

                                       23
<PAGE>
     9.03 Indemnification by GD Sub.

          9.03-1 Notwithstanding any investigation by Orange or Partners, from
and after the Closing, GDSC and GD Sub shall indemnify, hold harmless and, to
the extent provided in Section 9.04-1, defend Orange, Partners, and their
respective partners, affiliates, officers, employees, agents, successors and
assigns (collectively, "Orange's Indemnified Persons") from and against, and
reimburse each of Orange's Indemnified Persons with respect to, any and all
Damages incurred by any of Orange's Indemnified Persons by reason of or arising
out of or in connection with:

               (a) any material breach or inaccuracy of any representation or
warranty of GDSC or GD Sub made in this Agreement or any Related Document;

               (b) any failure by GDSC or GD Sub to perform any covenant
required to be performed by them pursuant to this Agreement or any Related
Document after reasonable opportunity to cure; or

               (c) any liability or obligation of Orange to any third party
expressly assumed by GD Sub in accordance with the terms of this Agreement.

          9.03-2 This indemnification extends to any Damages suffered by any of
Orange's Indemnified Persons whether or not a claim is made against any of
Orange's Indemnified Persons by any third party.

     9.04 Indemnification Procedure.

          9.04-1 Third Party Claims.

               (a) Each indemnified party shall, with reasonable promptness
after obtaining knowledge thereof, provide any indemnifying party against whom a
claim for indemnification is to be made under this Article 9 with written notice
of all third party actions, suits, proceedings, claims, demands or assessments
that may be subject to the indemnification provisions of this Article 9
(collectively, "Third Party Claims"), including, in reasonable detail, the basis
for the claim, the nature of Damages and a good faith estimate of the amount of
Damages.

               (b) Each indemnifying party shall have 15 days after its receipt
of the claim notice to notify the indemnified party in writing whether the
indemnifying party agrees that the claim is subject to this Article 9 and, if
so, whether the indemnifying party elects, jointly with any other indemnifying
party notified under Section 9.04-1(a), to undertake, conduct and control,
through counsel of its or their choosing (subject to the consent of the
indemnified party, such consent not to be withheld unreasonably) and at its or
their sole risk and expense, the good faith settlement or defense of the Third
Party Claim.

                                       24
<PAGE>
               (c) If within 15 days after its receipt of the claim notice an
indemnifying party notifies the indemnified party that it elects to undertake
the good faith settlement or defense of the Third Party Claim, the indemnified
party shall cooperate reasonably with the indemnifying party in connection
therewith including, without limitation, by making available to the indemnifying
party all relevant information material to the defense of the Third Party Claim.
The indemnified party shall be entitled to participate in the settlement or
defense of the Third Party Claim through counsel chosen by the indemnified
party, at its expense, and to approve any proposed settlement that would impose
any obligation or duty on the indemnified party, which approval may, in the sole
discretion of the indemnified party, be withheld. So long as an indemnifying
party is contesting the Third Party Claim in good faith and with reasonable
diligence, the indemnified party shall not pay or settle the Third Party Claim.
Notwithstanding the foregoing, the indemnified party shall have the right to pay
or settle any Third Party Claim at any time, provided that in such event it
waives any right to indemnification therefor by the indemnifying party.

               (d) If an indemnifying party does not provide notice that it
elects to undertake the good faith settlement or defense of the Third Party
Claim, or if an indemnifying party fails to contest the Third Party Claim or
undertake or approve settlement, in good faith and with reasonable diligence,
the indemnified party shall thereafter have the right to contest, settle or
compromise the Third Party Claim at its exclusive discretion, at the risk and
expense of the indemnifying party, and the indemnifying party will thereby waive
any claim, defense or argument that the indemnified party's settlement or
defense of such Third Party Claim is in any respect inadequate or unreasonable.

               (e) A party's failure to give timely notice will not constitute a
defense, in part or in whole, to any claim for indemnification by such party,
except if, and only to the extent that, such failure results in any material
prejudice to the indemnifying party.

          9.04-2 Non-Third Party Claims.

               (a) Each indemnified party shall, with reasonable promptness,
deliver to any indemnifying party against whom a claim for indemnification is to
be made under this Article 9 written notice of all claims for indemnification
under this Article 9, other than Third Party Claims, including, in reasonable
detail, the basis for the claim, the nature of Damages and a good faith estimate
of the amount of Damages.

               (b) Each indemnifying party shall have 30 days after its receipt
of the claim notice to notify the indemnified party in writing whether or not
the indemnifying party accepts liability for all or any part of the Damages
described in the claim notice. If the indemnifying party does not so notify the
indemnified party, the indemnifying party shall be deemed to accept liability
for all the Damages described in the claim notice.

                                       25
<PAGE>
               (c) A party's failure to give timely notice will not constitute a
defense, in part or in whole, to any claim for indemnification by such party,
except if, and only to the extent that, such failure results in any material
prejudice to the indemnifying party.

     9.05 Right of Offset. At the election of GD Sub, any liability of Orange or
any Partner under Section 9.02 which has been established by agreement,
litigation or in accordance with the procedure set forth in Section 9.04 may be
satisfied by offsetting such liability against any Earnout Consideration then
due or that subsequently becomes due. For this purpose, a liability shall not be
deemed to have been established in accordance with the procedure set forth in
Section 9.04 if Orange or the Partner has asserted under Section 9.04-1(b) that
the liability is not subject to this Article 9 and the question has not been
resolved by agreement or litigation.

     9.06 Rights Not Exclusive. An indemnified party's rights to indemnification
under this Article 9 are in addition to, and not in lieu of, any other rights to
which the indemnified party may be entitled at law or in equity.

                                    ARTICLE X

                         Confidentiality; Press Releases

     10.01 Confidentiality.

          10.01-1 No information concerning Orange not previously disclosed to
the public or in the public domain that has been furnished to or obtained by
GDSC or GD Sub under this Agreement or in connection with the transactions
contemplated hereby shall be disclosed to any person other than in confidence to
employees, legal counsel, financial advisers or independent public accountants
of GDSC or GD Sub or used for any purpose other than as contemplated herein. If
the transactions contemplated by this Agreement are not consummated, GDSC and GD
Sub shall hold such information in confidence for a period of four years from
the date of any termination of this Agreement, and all such information that is
in writing or embodied on a diskette, tape or other tangible medium shall be
promptly returned to Orange.

          10.01-2 No information concerning GDSC or GD Sub not previously
disclosed to the public or in the public domain that has been furnished to or
obtained by Orange or Partners under this Agreement or in connection with the
transactions contemplated hereby shall be disclosed to any person other than in
confidence to the employees, legal counsel, financial advisers or independent
public accountants of Orange or used for any purpose other than as contemplated
herein. If the transactions contemplated by this Agreement are not consummated,
Orange and Partners shall hold such information in confidence for a period of
four years from the date of any termination of this Agreement, and all such
information that is in writing or embodied on a diskette, tape or other tangible
medium shall be promptly returned to GD Sub.

                                       26
<PAGE>
          10.01-3 Notwithstanding the foregoing, such obligations of GD Sub and
of Orange shall not apply to information

               (a) that is, or becomes, publicly available from a source other
than GD Sub or Orange, as the case may be;

               (b) that was known and can be shown to have been known by GD Sub
at the time of its receipt from Orange, or by Orange at the time of its receipt
from GD Sub, as the case may be;

               (c) that is received by GD Sub from a third party without breach
of this Agreement by GD Sub, or is received by Orange from a third party without
breach of this Agreement by Orange, as the case may be;

               (d) that is required by law to be disclosed; or

               (e) that is disclosed in accordance with the written consent of
GD Sub or of Orange, as the case may be.

     10.02 Press Releases. No press releases or other public announcements
concerning the transactions contemplated by this Agreement shall be made by
Orange without the prior written consent of GD Sub; provided, however, that
nothing herein shall prevent a party from supplying such information or making
statements as required by governmental authority or in order for a party to
satisfy its legal obligations (prompt notice of which shall in any such case be
given to the other party or parties).

                                   ARTICLE XI

                                Other Provisions

     11.01 Benefit and Assignment. This Agreement shall be binding upon and
shall inure to the benefit of the parties hereto and their respective successors
and assigns. No party hereto may voluntarily or involuntarily assign such
party's interest under this Agreement without the prior written consent of the
other parties.

     11.02 Entire Agreement. This Agreement and the Schedules and Exhibits
referred to herein embody the entire agreement and understanding of the parties
and supersede any and all prior agreements, arrangements and understandings
relating to matters provided for herein.

     11.03 Fees and Expenses. GDSC and GD Sub shall be solely responsible for
all costs and expenses incurred by them, and Orange shall be solely responsible
for all costs and expenses incurred by Orange, in connection with the
negotiation, preparation and performance of and compliance with the terms of
this Agreement.

                                       27
<PAGE>
     11.04 Amendment, Waiver, etc. The provisions of this Agreement may be
amended or waived only by an instrument in writing signed by the party against
which enforcement of such amendment or waiver is sought. Any waiver of any term
or condition of this Agreement or any breach hereof shall not operate as a
waiver of any other such term, condition or breach, and no failure to enforce
any provision hereof shall operate as a waiver of such provision or of any other
provision hereof.

     11.05 Headings. The headings are for convenience only and will not control
or affect the meaning or construction of the provisions of this Agreement.

     11.06 Governing Law. The construction and performance of this Agreement
will be governed by the laws of the State of Washington (except for the choice
of law provisions thereof).

     11.07 Notices. Any notice, demand or request required or permitted to be
given under the provisions of this Agreement shall be in writing; shall be
delivered personally, including by means of telecopy, or mailed by registered or
certified mail, postage prepaid and return receipt requested; shall be deemed
given on the date of personal delivery or on the date set forth on the return
receipt; and shall be delivered or mailed to the addresses or telecopy numbers
set forth on the first page of this Agreement or to such other address as any
party may from time to time direct, with copies to:

           In the case of GDSC or GD Sub:

                Stoel Rives LLP
                900 SW Fifth Avenue, Suite 2300
                Portland, OR  97204
                Telecopy No.:  (503) 220-2480

                Attention:  Edward L. Epstein

           In the case of Orange or Partners:

                Miller & Holguin
                1801 Century Park East, 7th Floor
                Los Angeles, CA  90067
                Telecopy No.:  (310) 557-2205

                Attention:  Henry Holguin

     11.08 Breach; Equitable Relief. The parties acknowledge that the Dental
Practice and rights of the parties described in this Agreement are unique and
that money damages alone for breach of this Agreement would be inadequate. Any
party aggrieved by a breach of the provisions hereof may bring an action at law
or suit in equity to obtain redress, including specific performance, injunctive
relief or any other available equitable remedy. Time and strict performance are
of the essence in this Agreement.

                                       28
<PAGE>
     11.09 Attorneys' Fees. If suit or action is filed by any party to enforce
the provisions of this Agreement or otherwise with respect to the subject matter
of this Agreement, the prevailing party shall be entitled to recover reasonable
attorneys' fees as fixed by the trial court and, if any appeal is taken from the
decision of the trial court, reasonable attorneys' fees as fixed by the
appellate court. For purposes of this Agreement, the term "prevailing party"
shall be deemed to include a party that successfully opposes a petition for
review filed with an appellate court.

     11.10 Guarantee. GDSC irrevocably and unconditionally guarantees that GD
Sub will perform each and every obligation of GD Sub under this Agreement and
waives and agrees not to assert or take advantage of any of the following to the
extent they might apply: (a) any right to require Orange or Partners to proceed
against GD Sub, it being understood and agreed that Orange and Partners may
proceed against GDSC without first proceeding against GD Sub or any other person
or entity; (b) Orange's or Partners' failure to file or enforce any claim in any
bankruptcy or insolvency proceedings against GD Sub; (c) any presentment,
demand, protest or notice of any kind to GDSC, including without limitation,
notice of the acceptance of this guarantee, or of any action or nonaction on the
part of GD Sub under this Agreement; or (d) any right to prior notice and
approval of any extension of the time for payment of any amounts or performance
of any obligations due under this Agreement or any other modification,
alteration or change of this Agreement.

     11.11 Counterparts. This Agreement may be executed in one or more
counterparts, each of which will be deemed an original but all of which together
will constitute one and the same instrument.

     IN WITNESS WHEREOF, the parties have executed this Agreement as of the day
and year first written above.


     GDSC:                             GENTLE DENTAL SERVICE CORPORATION


                                       By: L. T. VAN EERDEN
                                           -------------------------------------
                                       Title:  Executive Vice President


     GD SUB:                           GENTLE DENTAL MANAGEMENT, INC.


                                       By: L. T. VAN EERDEN
                                           -------------------------------------
                                       Title:  Executive Vice President

                                       29
<PAGE>
     ORANGE:                           ORANGE DENTAL SERVICES


                                       By: STEPHEN THORNE IV
                                           -------------------------------------
                                       Title:  President of the Managing Partner


     PARTNERS:                         PACIFIC DENTAL SERVICES, INC.


                                       By: STEPHEN THORNE IV
                                           -------------------------------------
                                       Title:  President


                                       BRUCE E. SCHWANDT, D.D.S.
                                       -----------------------------------------
                                       Bruce E. Schwandt, D.D.S.

                                       30

                            ASSET PURCHASE AGREEMENT

                                     between

                       GENTLE DENTAL SERVICE CORPORATION,

                         GENTLE DENTAL MANAGEMENT, INC.

                                       and

                               TG3 DENTAL SERVICES


                               Dated June 30, 1998

<PAGE>
                                TABLE OF CONTENTS

                                                                           Page
                                                                           ----

ARTICLE I - Purchase and Sale of Assets...............................       2

         1.01     Purchase and Sale...................................       2
         1.02     Excluded Assets.....................................       3
         1.03     Assumption of Liabilities...........................       3
         1.04     Purchase Price......................................       4
         1.05     Purchase Price Adjustment...........................       5
         1.06     Instruments of Conveyance and Transfer..............       6
         1.07     Further Assurances..................................       6
         1.08     Closing.............................................       6
         1.09     Sales Tax...........................................       6
         1.10     Allocation of Purchase Price........................       6

ARTICLE II - Representations and Warranties of GD Sub and GDSC........       7

         2.01     Authorization.......................................       7
         2.02     Capitalization......................................       7
         2.03     Compliance..........................................       7
         2.04     Consents............................................       8
         2.05     Accuracy of Representations & Warranties............       8
         2.06     Rule 144............................................       8

ARTICLE III - Representations and Warranties of TG3 and Partners......       8

         3.01     Corporate Existence; Authority......................       8
         3.02     No Adverse Consequences.............................       9
         3.03     Brokers and Finders.................................       9
         3.04     Litigation..........................................       9
         3.05     Compliance with Laws................................      10
         3.06     Employment Matters..................................      10
         3.07     Financial Statements................................      11
         3.08     Receivables.........................................      12
         3.09     Prepaid Expenses and Other..........................      12
         3.10     Personal Property...................................      12
         3.11     Payables............................................      12
         3.12     Indebtedness........................................      12
         3.13     Other Liabilities...................................      12
         3.14     Absence of Certain Changes or Events................      12
         3.15     Leases   ...........................................      13
         3.16     Certain Contracts and Arrangements..................      13
         3.17     Status of Contracts and Leases......................      14
         3.18     Title and Condition of Tangible Assets..............      15

                                       i
<PAGE>
                                                                           Page
                                                                           ----

         3.19     Insurance...........................................      15
         3.20     Taxes    ...........................................      16
         3.21     No Restrictions.....................................      16
         3.22     Permits and Licenses................................      16
         3.23     Certain Payments....................................      16
         3.24     Environmental Conditions............................      17
         3.25     Consents and Approvals..............................      17
         3.26     Records.............................................      17
         3.27     Investment Representations..........................      17
         3.28     Access to Information...............................      18
         3.29     Sophistication......................................      18
         3.30     Accredited Investor.................................      18
         3.31     Reliance............................................      18
         3.32     Accuracy of Representations and Warranties..........      18

ARTICLE IV - Covenants of TG3 and Partners............................      19

         4.01     Access to Properties, Books and Records.............      19
         4.02     Negative Covenants..................................      19
         4.03     Affirmative Covenants...............................      20
         4.04     No Negotiations With Others.........................      21
         4.05     Employees...........................................      21

ARTICLE V - Joint Covenants...........................................      21

         5.01     Governmental Consents...............................      21
         5.02     Best Efforts; No Inconsistent Action................      21

ARTICLE VI - Conditions to Obligations of GD Sub......................      22

         6.01     Governmental Approvals..............................      22
         6.02     Consents............................................      22
         6.03     Representations, Warranties and Covenants...........      22
         6.04     Adverse Proceedings.................................      22
         6.05     No Adverse Change...................................      23
         6.06     Management Agreement................................      23
         6.07     Shares Acquisition Agreement........................      23
         6.08     Dentist Employment Agreements.......................      23
         6.09     Closing of Related Transactions.....................      23
         6.10     Actions Satisfactory to GD Sub's Counsel............      23

                                       ii
<PAGE>
                                                                           Page
                                                                           ----

ARTICLE VII - Conditions to Obligations of TG3........................      23

         7.01     Representations, Warranties and Covenants...........      23
         7.02     Adverse Proceedings.................................      24
         7.03     Stock Price.........................................      24

ARTICLE VIII - Termination............................................      24

         8.01     Right of Parties to Terminate.......................      24
         8.02     Effect of Termination...............................      24

ARTICLE IX - Survival; Indemnification................................      25

         9.01     Survival............................................      25
         9.02     Indemnification by TG3 and Partners.................      25
         9.03     Indemnification by GD Sub...........................      26
         9.04     Indemnification Procedure...........................      26
         9.05     Right of Offset.....................................      27
         9.06     Rights Not Exclusive................................      28

ARTICLE X - Confidentiality; Press Releases...........................      28

         10.1     Confidentiality.....................................      28
         10.2     Press Releases......................................      29

ARTICLE XI - Other Provisions.........................................      29

         11.01    Benefit and Assignment..............................      29
         11.02    Entire Agreement....................................      29
         11.03    Fees and Expenses...................................      29
         11.04    Amendment, Waiver, etc..............................      29
         11.05    Headings............................................      29
         11.06    Governing Law.......................................      30
         11.07    Notices.............................................      30
         11.08    Breach; Equitable Relief............................      30
         11.09    Attorneys' Fees.....................................      30
         11.10    Guarantee...........................................      30
         11.11    Counterparts........................................      31

                                      iii
<PAGE>
                             INDEX OF DEFINED TERMS


Term                                                    Location of Definition
- ----                                                    ----------------------

1933 Act............................................    2.06
Adjusted Stock Consideration Amount.................    1.04-2
Admin Charge........................................    1.04-4
Administrative Office...............................    1.04-4
Assets..............................................    1.01
Assumed Liabilities.................................    1.04-3
Cash Consideration..................................    1.04-1
Closing.............................................    1.08
Closing Date........................................    1.08
Code................................................    3.06-2
Contracts...........................................    1.01-6
Current Balance Sheet...............................    3.07-1
DDS.................................................    6.09
Damages.............................................    9.02-1
Dental Practice.....................................    Introduction
Earnout Consideration...............................    1.04-4
Earnout Period......................................    1.04-4
EBITDA..............................................    1.04-4
ERISA...............................................    3.06-2
ERISA Plans.........................................    3.06-2
Environmental Law...................................    3.24-2(a)
Excess Cap-ex Charge................................    1.04-4
Excess EBITDA.......................................    1.04-4
Financial Statements................................    3.07-1
GD Sub..............................................    Introduction
GD Sub's Indemnified Persons........................    9.02-1
GDSC................................................    Introduction
GDSC Common Stock...................................    1.04-2
Ghazal..............................................    Introduction
Hazardous Substance.................................    3.24-2(b)
Leases..............................................    1.01-5
Material Adverse Change.............................    Article III Introduction
Material Adverse Effect.............................    Article III Introduction
Net Current Assets..................................    1.05-3
Partners............................................    Introduction
PDS.................................................    1.04-4
Permits.............................................    3.22
Policies............................................    3.19
Prevailing Party....................................    11.09

                                       iv
<PAGE>
Professional Corporation............................    Introduction
Purchase Price......................................    1.04
Purchase Price Adjustment...........................    1.05-1
Real Property.......................................    3.15
Registration Statement..............................    2.02
Related Documents...................................    9.01
Returns.............................................    3.20-1
Shares..............................................    2.06
Stock Consideration Amount..........................    1.04-2
Stock Price.........................................    1.04-2
Tangible Personal Property..........................    3.10
Taxes...............................................    3.20-3
TG3.................................................    Introduction
TG3 Assignable Option Agreement.....................    Introduction
TG3 Management Agreements...........................    Introduction
TG3's Indemnified Persons...........................    9.03-1
Third Party Claims..................................    9.04-1(a)

                                       v
<PAGE>
                                LIST OF EXHIBITS

Exhibit                          Item                            First Reference
- -------                          ----                            ---------------

   A                       Assumption Agreement                      1.04-3
   B                       Assignment and Bill of Sale               1.06
   C                       Management Agreement                      6.06
   D                       Shares Acquisition Agreement              6.07
   E                       Dentist Employment Agreement              6.08



                                LIST OF SCHEDULES


         Schedule                                Content
         --------                                -------

         1.02-2                                  Excluded Assets
         1.10                                    Purchase Price Allocation
         3.04                                    Litigation
         3.06-2                                  Employee Benefits
         3.06-3                                  Employment Manuals and Policies
         3.06-4                                  Compensation
         3.07                                    Financial Statements
         3.08                                    Receivables
         3.09                                    Prepaid Expenses and Other
         3.10                                    Tangible Personal Property
         3.11                                    Payables
         3.12                                    Indebtedness
         3.13                                    Other Liabilities
         3.15                                    Leases
         3.16                                    Contracts
         3.19                                    Insurance
         3.22                                    Permits and Licenses
         3.25                                    Consents and Approvals

                                       vi
<PAGE>
                            ASSET PURCHASE AGREEMENT


DATED:            June 30, 1998


BETWEEN:          GENTLE DENTAL SERVICE CORPORATION,
                    a Washington corporation
                  900 Washington Street, Suite 1100
                  Vancouver, WA  98660
                  Telecopy No.:  (360) 750-8667                           "GDSC"


                  GENTLE DENTAL MANAGEMENT, INC.
                    a Delaware corporation
                  900 Washington Street, Suite 1100
                  Vancouver, WA 98660
                  Telecopy No.:  (360) 750-8667                         "GD Sub"


AND:              TG3 DENTAL SERVICES
                  129 West Wilson Street, Suite 200
                  Costa Mesa, CA  92627
                  Telecopy No.:  (714) 646-1659                            "TG3"


AND:              Stephen E. Thorne IV ("Thorne")
                  and Carolyn G. Ghazal, D.D.S. ("Ghazal")              artners"


     Partners are the owners of all of the partnership interests of TG3. TG3
provides management services to Riverside Dental Practice, the dental practice
located at 3630 Central Avenue, Suite 1, Riverside, California 92506 (the
"Dental Practice"). The Dental Practice is conducted by Carolyn G. Ghazal,
D.D.S., Inc., a California professional corporation (the "Professional
Corporation"). TG3 is party to a management agreement with the Professional
Corporation (the "TG3 Management Agreement") and to an assignable option
agreement with the Professional Corporation and Ghazal, its sole shareholder
(the "TG3 Assignable Option Agreement"). TG3 desires to sell, and GD Sub desires
to purchase, substantially all of the assets associated with the Dental Practice
on the terms and conditions set forth in this Agreement.

     In consideration of the mutual promises and covenants contained in this
Agreement, the parties agree as follows:

<PAGE>
                                    ARTICLE I

                           Purchase and Sale of Assets

     1.01 Purchase and Sale. Subject to all the terms and conditions of this
Agreement and for the consideration herein stated, on the "Closing Date," as
that term is defined in Section 1.08, TG3 agrees to sell, convey, assign,
transfer and deliver to GD Sub, and GD Sub agrees to purchase and accept from
TG3, all of the assets, properties and rights of TG3 (other than the assets
specified in Section 1.02), tangible and intangible, wherever located, that are
used or useful to maintain and operate the Dental Practice, which assets (the
"Assets") shall include without limitation:

          1.01-1 All patient lists, operating data and records relating to the
Dental Practice, including without limitation financial, accounting and credit
records, correspondence, budgets, engineering and facility records and other
similar documents and records;

          1.01-2 All other items of tangible personal property of TG3 used in
connection with or associated with the Dental Practice, including furniture,
fixtures, equipment, supplies, inventory and spare and replacement items
therefor, including without limitation all such items listed on Schedule 3.10
and all such items acquired by TG3 after the date hereof and on or before the
Closing Date, other than to the extent such items are disposed of by TG3 prior
to the Closing Date without breach of this Agreement;

          1.01-3 All accounts receivable and other receivables of TG3 associated
with the Dental Practice, including without limitation all receivables listed on
Schedule 3.08 and all receivables generated after March 31, 1998 and on or
before the Closing Date, other than to the extent such receivables have been
collected by TG3 prior to the Closing Date;

          1.01-4 All prepaid and deferred items of TG3 relating to the Dental
Practice, including prepaid rent, insurance, taxes and unbilled charges and
deposits, including without limitation all such items listed on Schedule 3.09;

          1.01-5 All leases of real or personal property to which TG3 is a party
as lessee and which relate to the Dental Practice, including without limitation
all leases listed on Schedule 3.10 and Schedule 3.15 and all leases entered into
after the date hereof and on or before the Closing Date and expressly assumed by
GD Sub in writing on the Closing Date as provided in Section 1.04-3(d), other
than to the extent such leases have terminated, expired or been disposed of by
TG3 prior to the Closing Date without breach of this Agreement (collectively,
the "Leases");

          1.01-6 All rights, benefits and interests of TG3 under the contracts,
agreements, commitments, understandings, purchase orders, documents and
instruments listed on Schedule 3.16 hereto, specifically including the TG3
Management Agreement and the TG3 Assignable Option Agreement, and under any
contracts, agreements, commitments, understandings, purchase orders, documents
or instruments entered into between the date hereof and the Closing Date and
expressly assumed by GD Sub in writing on the Closing Date as provided in
Section 1.04-3(d), other than to the

                                       2
<PAGE>
extent such items have terminated, expired or been disposed of by TG3 prior to
the Closing Date without breach of this Agreement (collectively, the
"Contracts");

          1.01-7 All assignable rights to all telephone lines and numbers used
in the conduct of the Dental Practice; and

          1.01-8 All right, title and interest in and to trade names of TG3
associated with the Dental Practice.

     1.02 Excluded Assets. The Assets shall not include the following:

          1.02-1 Any lease not listed on Schedule 3.10 or Schedule 3.15 and any
contract, agreement, commitment, understanding, purchase order, document or
instrument not listed on Schedule 3.16, unless pursuant to Section 1.04-3(d) GD
Sub expressly agrees in writing on the Closing Date to assume the obligations
under such lease, contract, agreement, commitment, understanding, purchase
order, document or instrument, in which case TG3 shall assign its rights and
benefits thereunder to GD Sub and the same shall be treated as a "Lease" or
"Contract" for purposes of this Agreement; and

          1.02-2 The assets identified on Schedule 1.02-2.

     1.03 Assumption of Liabilities. Except for the liabilities and obligations
to be assumed by GD Sub pursuant to Section 1.04-3, GD Sub will not assume and
will not be liable for any liabilities of TG3, known or unknown, contingent or
absolute, accrued or other, and the Assets shall be free of all liabilities,
obligations, liens and encumbrances. Without limiting the generality of the
foregoing and except as otherwise provided above, GD Sub will not be responsible
for any of the following:

          1.03-1 Liabilities, obligations or debts of TG3, whether fixed,
contingent or mixed and whether based on events occurring before or after the
Closing Date, including without limitation those based on tort, contract,
statutory or other claims or involving fines or penalties payable to any
governmental authority;

          1.03-2 Liabilities, obligations or debts of TG3 for any federal, state
or local tax, including without limitation federal income taxes, state income
and excise taxes, state and local real and personal property taxes and federal,
state and local withholding and payroll taxes;

          1.03-3 Liabilities or obligations of TG3 to employees for salaries,
bonuses or health and welfare benefits or with respect to any profit sharing,
stock bonus, pension, retirement, stock purchase, option, bonus or deferred
compensation plan or for any other benefits or compensation (including without
limitation accrued vacation or sick leave); and

          1.03-4 Liabilities or obligations of TG3 for employee severance
payments or arrangements resulting from termination of TG3's employees.

                                        3
<PAGE>
     1.04 Purchase Price. The purchase price for the Assets (the "Purchase
Price") shall be the following:

          1.04-1 $840,000 (the "Cash Consideration"), payable by check on the
Closing Date with the portion of such amount representing the Closing Date
payoff amounts for the lenders as listed under the heading "debt to be paid off"
on Schedule 3.12 being payable by check to such lenders and the balance of such
amount payable by check to TG3.

          1.04-2 A number of shares of GDSC's Common Stock ("GDSC Common Stock")
determined by dividing the Adjusted Stock Consideration Amount (as defined
below) by a number (the "Stock Price") equal to the average of the closing
prices of GDSC Common Stock reported by NASDAQ for the five trading days prior
to the date of this Agreement. The "Stock Consideration Amount" equals $360,000.
The "Adjusted Stock Consideration Amount" shall equal the Stock Consideration
Amount reduced by the principal amount of any debt or capital lease obligations
of TG3 assumed by GD Sub. The shares of GDSC Common Stock to be delivered under
this Agreement shall be issued by GDSC to GD Sub for transfer by GD Sub to TG3.

          1.04-3 The assumption by GD Sub on the Closing Date, pursuant to the
terms of an Assumption Agreement in substantially the form attached hereto as
Exhibit A, of the following liabilities of TG3 (the "Assumed Liabilities"):

               1.04-3(a) the accounts payable and accrued liabilities of TG3
associated with the Dental Practice to the extent and in the amounts identified
on Schedule 3.11 (to the extent such liabilities are not paid or discharged
prior to the Closing Date);

               1.04-3(b) all liabilities of TG3 associated with the Dental
Practice of a type identified on Schedule 3.11 and incurred in the ordinary
course of business after March 31, 1998 and on or before the Closing Date (to
the extent such liabilities are not paid or discharged prior to the Closing
Date), but specifically excluding any liabilities for brokers' and attorneys'
fees and other expenses of this transaction and accrued liabilities for taxes
based on the income or revenues of TG3;

               1.04-3(c) all obligations of TG3 under any of the Leases or
Contracts listed on Schedule 3.10, Schedule 3.15 or Schedule 3.16 hereto or
under any of the items listed under the heading "debt to be assumed" on Schedule
3.12; and

               1.04-3(d) all obligations of TG3 under any lease, contract,
agreement, commitment, understanding, purchase order, document or instrument
entered into by TG3 between the date of this Agreement and the Closing Date that
GD Sub, in its sole discretion, elects on the Closing Date to assume.

          1.04-4 Additional payments (the "Earnout Consideration") to be paid
based on the EBITDA (as defined below) for the 24-month period (the "Earnout
Period") beginning on the first day of the first calendar month following the
Closing Date. The first payment of Earnout Consideration shall equal 6.0
multiplied by the EBITDA for the first 12 months of the Earnout Period, reduced
by the sum of the Cash Consideration and the Stock Consideration Amount. The
second payment of

                                       4
<PAGE>
Earnout Consideration shall equal 6.0 multiplied by the EBITDA for the second 12
months of the Earnout Period, reduced by the sum of the Cash Consideration and
the Stock Consideration Amount and further reduced by the amount of the first
payment of Earnout Consideration. The "EBITDA" shall mean the combined net
income of (a) the Professional Corporation and (b) GD Sub from the provision of
services to the Professional Corporation, before any reduction for interest,
income taxes, depreciation or amortization, and excluding any allocation of GD
Sub corporate overhead expense, but after the Excess Cap-ex Charge (as defined
below) and the Admin Charge (as defined below), as reflected on a combined
income statement for the practice location prepared in conformity with generally
accepted accounting principles applied in a manner consistent with the
application of such principles to the preparation of GD Sub's audited financial
statements. The "Excess Cap-ex Charge" shall be an annual charge equal to 25% of
the total accumulated capital expenditures by GD Sub at the Dental Practice
after the Closing Date which in any 12-month period exceeds 2% of the net
revenue of the Dental Practice for such period. The "Admin Charge" shall equal a
pro rata portion of the sum of (a) rent reimbursed by GD Sub to Pacific Dental
Services, Inc. ("PDS") for the administrative office acquired by GD Sub from PDS
(the "Administrative Office"), and (b) all unreimbursed costs incurred by GD Sub
at the Administrative Office, including but not limited to employee compensation
and benefits, based on the ratio of the net revenue of the Dental Practice to
the combined net revenue of all dental practices managed by GD Sub from the
Administrative Office for the relevant period. Eighty percent of the first
payment of Earnout Consideration shall be paid by check. The remaining 20% of
the first payment of Earnout Consideration shall be paid in shares of GDSC
Common Stock. To determine the number of shares of GDSC Common Stock to be
issued as part of the first payment of Earnout Consideration, a share of GDSC
Common Stock shall be valued at the average of the closing prices of GDSC Common
Stock reported by NASDAQ for the five trading days prior to the 60th day after
the end of the first 12 months of the Earnout Period. All of the second payment
of Earnout Consideration shall be paid by check. The calculation and payment of
each payment of Earnout Consideration shall be completed within 90 days of the
completion of the applicable 12-month portion of the Earnout Period.

     1.05 Purchase Price Adjustment. The Cash Consideration may be subject to
adjustment after Closing as set forth in this Section 1.05.

          1.05-1 As soon as reasonably possible after Closing, the amount of the
"Net Current Assets" (as defined in Section 1.05-3) shall be determined as
provided in Section 1.05-4. If the amount of Net Current Assets is $50,000 more
or less than the Target Amount (as defined below), the Cash Consideration shall
be adjusted by the full amount of the difference (the "Purchase Price
Adjustment"). If the difference between Net Current Assets and the Target Amount
does not exceed $50,000, there shall be no Purchase Price Adjustment. The
"Target Amount" shall mean $0 plus the amount of the accounts receivable of TG3
associated with the Dental Practice, net of contractual allowances and bad debt
reserve, at June 30, 1998.

          1.05-2 If the Net Current Assets are greater than $50,000 plus the
Target Amount, the Purchase Price Adjustment shall be paid to TG3 by check
within 10 days after TG3 delivers the certificate described in Section 1.05-4.
If the Net Current Assets are less than the Target Amount minus $50,000, the
Purchase Price Adjustment shall be paid by TG3 to GD Sub by check within 10 days
after TG3 delivers the certificate described in Section 1.05-4.

                                        5
<PAGE>
          1.05-3 "Net Current Assets" means the sum of (a) accounts receivable
of TG3 associated with the Dental Practice, net of contractual allowances and
bad debt reserve, at the Closing Date and (b) any prepaid expenses of TG3
relating to the Dental Practice properly recordable on a balance sheet of TG3 as
of the Closing Date reduced by the sum of (x) the accounts payable of TG3
associated with the Dental Practice at the Closing Date and (y) the accrued
liabilities of TG3 associated with the Dental Practice at the Closing Date,
specifically including an accrual of payroll and payroll-related charges up to
and including the Closing Date, but only to the extent such payables and
liabilities are assumed by GD Sub, all as determined consistently with the
accounting conventions applied in determining the amounts set forth in
paragraphs 1.05-1 and 1.05-2 above.

          1.05-4 At or after the Closing Date, TG3 shall execute and deliver to
GD Sub a certificate detailing the calculation of Net Current Assets and
including as schedules thereto lists of all receivables, prepaid expenses,
payables and accrued liabilities as of the Closing Date included in the
calculation. In this certificate, TG3 shall certify the accuracy and
completeness of the schedules to the certificate and the accuracy of the
calculation of Net Current Assets.

     1.06 Instruments of Conveyance and Transfer. The sale of the Assets, and
the conveyance, assignment, transfer and delivery of all of the Assets shall be
effected by TG3's execution and delivery to GD Sub, on the Closing Date, of a
bill of sale in substantially the form of the Assignment and Bill of Sale
attached hereto as Exhibit B.

     1.07 Further Assurances. TG3 and Partners agree that, at any time and from
time to time on and after the Closing Date, they will, upon the request of GD
Sub and without further consideration, take all steps reasonably necessary to
place GD Sub in possession and operating control of the Assets and will do,
execute, acknowledge and deliver, or will cause to be done, executed,
acknowledged and delivered, all further acts, deeds, assignments, conveyances,
transfers, powers of attorney or assurances as reasonably required to sell,
assign, convey, transfer, grant, assure and confirm to GD Sub, or to aid and
assist in the collection of or reducing to possession by GD Sub of, all of the
Assets, or to vest in GD Sub good, valid and marketable title to the Assets.

     1.08 Closing. The consummation of the transactions contemplated by this
Agreement (the "Closing") shall take place at the offices of Stoel Rives LLP,
900 SW Fifth Avenue, Suite 2300, Portland, Oregon, at 10:00 a.m., Pacific time,
on October 31, 1998 or at another date, time and place agreed upon in writing by
the parties (the "Closing Date").


     1.09 Sales Tax. TG3 shall pay any sales tax owing in respect of the
purchase of the Assets. TG3 shall promptly file all necessary sales tax returns,
if any, and pay all sales taxes due, if any, following the Closing Date.

     1.10 Allocation of Purchase Price. The Purchase Price shall be allocated
among the Assets in accordance with Schedule 1.10, and GDSC and TG3 shall be
bound by that allocation in reporting the transactions contemplated by this
Agreement to any governmental authority (including without limitation the
Internal Revenue Service).

                                       6
<PAGE>
                                   ARTICLE II

                Representations and Warranties of GD Sub and GDSC

     GD Sub and GDSC, jointly and severally, represent and warrant to TG3 as
follows:

     2.01 Authorization. Each of GD Sub and GDSC is a corporation duly
organized, validly existing and in good standing under the laws of the state of
its incorporation, with all requisite corporate power and authority to own and
operate its properties and to carry on its business as now conducted. Each of GD
Sub and GDSC has taken all corporate action necessary to authorize its
execution, delivery and performance of this Agreement. Each of GD Sub and GDSC
has full corporate power and authority to enter into this Agreement and carry
out the terms hereof. This Agreement has been duly executed and delivered by GD
Sub and GDSC and is binding upon and enforceable against each of them in
accordance with its terms, except as enforceability may be limited or affected
by applicable bankruptcy, insolvency, reorganization, or other laws of general
application relating to or affecting creditors' rights generally and except as
enforceability may be limited by rules of law governing specific performance,
injunctive relief or other equitable remedies.

     2.02 Capitalization. The authorized capital stock of GDSC consists of
50,000,000 shares of Common Stock, of which 7,994,213 shares are issued and
outstanding, and 30,000,000 shares of Preferred Stock, of which 1,628,863 shares
are issued and outstanding. All issued and outstanding shares of GDSC capital
stock are validly issued, fully paid and nonassessable, and have been issued
without violation of any preemptive rights. There is no subscription, option,
warrant, call, right, agreement or commitment (including any right of conversion
or exchange under any outstanding security or other instrument) relating to the
issuance by GDSC of GDSC capital stock other than outstanding options under the
GDSC 1993 Stock Incentive Plan, outstanding purchase rights under the GDSC
Employee Stock Purchase Plan and the GDSC Professional Corporation Employee
Stock Purchase Plan, other options and warrants described in GDSC's Registration
Statement on Form SB-2, Registration No. 333-44037 (the "Registration
Statement"), the proposed public offering of Common Stock described in the
Registration Statement, the issuance of convertible debt and preferred stock
announced by GDSC on May 12, 1998, and outstanding offers and/or agreements to
acquire other dental practices or dental practice management companies in
exchange for Common Stock. The GDSC Common Stock to be issued under this
Agreement will, when issued, be duly and validly authorized and issued, fully
paid and nonassessable.

     2.03 Compliance. The execution, delivery and performance of this Agreement
by GD Sub and GDSC, the compliance by GD Sub and GDSC with the provisions of
this Agreement and the consummation of the transactions described in this
Agreement will not conflict with or result in the breach of any of the terms or
provisions of or constitute a default under:

          2.03-1 the respective articles of incorporation or bylaws of GD Sub
and GDSC;

          2.03-2 any note, indenture, mortgage, deed of trust, loan agreement,
lease or other agreement or instrument to which GD Sub or GDSC is a party or by
which GD Sub or GDSC is bound; or

                                       7
<PAGE>
          2.03-3 any statute or any order, rule, regulation or decision of any
court or regulatory authority or governmental body applicable to GD Sub or GDSC.

     2.04 Consents. No consent, approval, authorization, order, designation or
declaration of any court or regulatory authority or governmental body, federal
or other, or third person is required to be obtained by GD Sub or GDSC for the
consummation of the transactions described in this Agreement.

     2.05 Accuracy of Representations & Warranties. None of the representations
or warranties of GD Sub or GDSC contains or will contain any untrue statement of
any material fact or omits or misstates a material fact necessary to make the
statements contained in this Agreement not misleading. Neither GD Sub nor GDSC
knows of any fact that has resulted or that, in the reasonable judgement of GD
Sub or GDSC will result, in any material adverse change in the business, results
of operation, financial condition or prospects of GD Sub or GDSC that has not
been set forth in this Agreement or in GDSC's filings with the Securities and
Exchange Commission.

     2.06 Rule 144. With a view to making available to TG3 the benefits of Rule
144 promulgated under the Securities Act of 1933 (the "1933 Act"), GDSC agrees,
during the one-year period starting on the first anniversary of the Closing Date
or such longer period as the public resale of the shares of GDSC Common Stock
issued under this Agreement ("Shares") by a nonaffiliate of GDSC is subject to
Rule 144, to file with the Securities and Exchange Commission in a timely manner
all reports and other documents required of GDSC under the Securities Exchange
Act of 1934. GDSC agrees to remove the legend described in the last sentence of
Section 3.27 from the certificates representing the Shares, upon request of the
holder, at any time after the second anniversary of the Closing Date or such
other time as the Shares may be freely sold by the holder without restriction
under Rule 144.

                                   ARTICLE III

               Representations and Warranties of TG3 and Partners

     As used in this Agreement, "Material Adverse Effect" means a material
adverse effect on the business, results of operations, financial position,
assets or prospects of TG3, the Dental Practice or any of them which shall in
any event include any adverse effect on the assets, revenue or net income of TG3
in excess of $15,000; and "Material Adverse Change" means any change that has
resulted, will result or is likely to result in a Material Adverse Effect. TG3
and Partners represent and warrant to GD Sub as follows:

     3.01 Corporate Existence; Authority.

          3.01-1 The Partners have full power and authority to enter into this
Agreement and carry out its terms. This Agreement has been duly and validly
executed and delivered by the Partners and is binding upon and enforceable
against each Partner in accordance with its terms, except as enforceability may
be limited or affected by applicable bankruptcy, insolvency, reorganization or
other laws of general application relating to or affecting the rights of
creditors and except as enforceability

                                       8
<PAGE>
may be limited by rules of law governing specific performance, injunctive relief
or other equitable remedies. The Professional Corporation is a professional
corporation duly organized, validly existing and in good standing under the laws
of the State of California, and the Professional Corporation has all necessary
corporate power and authority to own, lease and operate its properties and
assets and to carry on its business as now conducted and as proposed to be
conducted.

          3.01-2 TG3 is a partnership duly organized and validly existing under
the laws of California and has the power to own and lease its properties and
carry on its business as now being conducted. The Partners hold all of the
partnership interests of TG3 and no person has any right to become a partner of
TG3 or to acquire any interest in TG3. TG3 has full power and authority to enter
into this Agreement and to carry out its terms. This Agreement has been duly and
validly executed and delivered by TG3 and is binding upon and enforceable
against TG3 in accordance with its terms, except as enforceability may be
limited or affected by applicable bankruptcy, insolvency, reorganization or
other laws of general application relating to or affecting the rights of
creditors and except as enforceability may be limited by rules of law governing
specific performance, injunctive relief or other equitable remedies.

     3.02 No Adverse Consequences. Neither the execution and delivery of this
Agreement by TG3 or Partners nor the consummation of the transactions
contemplated by this Agreement will

          3.02-1 result in the creation or imposition of any lien, charge or
encumbrance on any of TG3's or the Professional Corporation's assets or
properties,

          3.02-2 violate or conflict with any provision of TG3's organizational
documents,

          3.02-3 violate any law, judgment, order, injunction, decree, rule,
regulation or ruling of any governmental authority applicable to TG3, Partners,
the Professional Corporation or any of them, assuming that the agreements to be
entered into between GD Sub and the Professional Corporation do not violate
applicable laws, or

          3.02-4 either alone or with the giving of notice or the passage of
time or both, conflict with, constitute grounds for termination or acceleration
of, result in the breach of the terms, conditions or provisions of, result in
the loss of any benefit to TG3 or the Professional Corporation under or
constitute a default under any agreement, instrument, license or permit to which
TG3, any Partner or any Professional Corporation is a party or by which any of
them is bound, assuming that the agreements to be entered into between GD Sub
and the Professional Corporation do not violate applicable laws.

     3.03 Brokers and Finders. Neither TG3 nor any Partner has employed any
broker, finder or agent or dealt with anyone purporting to act in such capacity
or agreed to pay any brokerage fee, finder's fee or commission with respect to
the transaction contemplated by this Agreement.

     3.04 Litigation. Except as set forth on Schedule 3.04, there is no claim,
litigation, proceeding or investigation of any kind pending or threatened by or
against TG3, or the Professional

                                       9
<PAGE>
Corporation and, to the best knowledge of TG3, there is no basis for any such
claim, litigation, proceeding or investigation.

     3.05 Compliance with Laws. Except as set forth on Schedule 3.22, TG3 and
the Professional Corporation have at all relevant times conducted their
businesses in compliance with their respective organizational documents and all
applicable laws and regulations. Except as set forth on Schedule 3.22, TG3 and
the Professional Corporation are not in violation of any applicable laws or
regulations, other than violations which singly or in the aggregate do not, and,
with the passage of time will not, have a Material Adverse Effect. Neither TG3
nor the Professional Corporation is subject to any outstanding order, writ,
injunction or decree, and neither TG3 nor the Professional Corporation has been
charged with, or threatened with a charge of, a violation of any provision of
federal, state or local law or regulation.

     3.06 Employment Matters.

          3.06-1 Labor Matters

               (a) Neither TG3 nor the Professional Corporation is a party or
otherwise subject to any collective bargaining or other agreement governing the
wages, hours or terms of employment of its employees. TG3 and the Professional
Corporation are and have been in compliance with all applicable laws regarding
employment and employment practices, terms and conditions of employment, wages
and hours and are not and have not been engaged in any unfair labor practice.

               (b) There is no (1) unfair labor practice complaint against TG3
or the Professional Corporation pending before the National Labor Relations
Board or any other governmental authority, (2) labor strike, slowdown or work
stoppage actually occurring or, to the best of the knowledge of TG3 threatened
against either of them, (3) representation petition respecting any of their
employees pending before the National Labor Relations Board, or (4) grievance or
any arbitration proceeding pending arising out of or under collective bargaining
agreements applicable to any of them.

               (c) Neither TG3 nor the Professional Corporation has experienced
any primary work stoppage or other organized work stoppage involving its
employees in the past two years.

          3.06-2 Employee Benefits. Schedule 3.06-2 lists all pension,
retirement, profit sharing, deferred compensation, bonus, commission, incentive,
life insurance, health and disability insurance, hospitalization and all other
employee benefit plans or arrangements (including, without limitation, any
contracts or agreements with trustees, insurance companies or others relating to
any such employee benefit plans or arrangements) established or maintained by
TG3 and complete and accurate copies of all those plans or arrangements have
been provided to GD Sub. The employee pension benefit plans (within the meaning
of Section 3(2) of the Employee Retirement Income Security Act of 1974, as
amended ("ERISA")) established and maintained by TG3 that are subject to ERISA
are listed separately as ERISA Plans on Schedule 3.06-2 (the "ERISA Plans"). The
ERISA Plans comply with the applicable requirements of ERISA. TG3 has received
from the Internal Revenue Service a favorable determination for each of the
ERISA

                                       10
<PAGE>
Plans and their related trusts that each of the ERISA Plans is qualified under
Section 401(a) of the Internal Revenue Code of 1986, as amended (the "Code") and
the related trust is tax-exempt under Section 501(a) of the Code. There has been
no event subsequent to that determination that has adversely affected the tax
qualified status of the ERISA Plans or the exemption of the related trusts other
than changes in the Code that are not effective as of the Closing Date. No
"accumulated funding deficiency" as defined in Section 302(a)(2) of ERISA or
Section 412(a) of the Code exists, or has existed, with respect to any of the
ERISA Plans. The present value of all accrued benefits under each of the ERISA
Plans does not exceed the value of such plan's assets, less all liabilities
other than those attributable to accrued benefits. TG3 has no "potential
withdrawal liability," as defined in Section 4201 of ERISA. None of the ERISA
Plans, its related trusts or any trustee, investment manager or administrator
thereof has engaged in a nonexempt "prohibited transaction," as such term is
defined in Section 406 of ERISA and Section 4975 of the Code. There are not and
have not been any excess deferrals or excess contributions under any ERISA Plan.
Each ERISA Plan is and has been operated and administered in conformance with
the requirements of all applicable laws and regulations, whether or not the
ERISA Plan documents have been amended to reflect such requirements. TG3 has no
obligation of any kind (whether under the terms of the ERISA Plans or under any
understanding with employees) to make payments under, or to pay contributions to
or in respect of, any plan or arrangement listed on Schedule 3.06-2, or any
other plan, agreement or other arrangement for deferred compensation of
employees, whether or not tax qualified, including, without limitation, a single
employer tax qualified plan, a tax qualified plan of a controlled group of
corporations, a multi-employer pension plan, a nonqualified deferred
compensation plan, an individual employment or compensation agreement or a
commitment to provide medical benefits to retirees.

          3.06-3 Employment Agreements. Each of the employees of TG3 and the
Professional Corporation is an "at-will" employee and, except as listed on
Schedule 3.06-3, there are no written employment, commission or compensation
agreements of any kind between TG3 or the Professional Corporation and any of
their respective employees. Schedule 3.06-3 lists and includes all of TG3's
employment or supervisory manuals, employment or supervisory policies, and
written information generally provided to employees (such as applications or
notices), and true and complete copies of those manuals, policies and written
information have been provided to GD Sub. TG3 does not have any agreements or
understandings with TG3's employees except as reflected in the items listed in
Schedules 3.06-2 and 3.06-3.

          3.06-4 Compensation. Schedule 3.06-4 contains a complete and accurate
list of all employees of TG3, as of June 29, 1998, specifying their names, hire
dates, the total amount paid or payable as compensation to each such person, and
the basis of such compensation.

     3.07 Financial Statements.

          3.07-1 Schedule 3.07 contains unaudited balance sheets of TG3 as of
March 31, 1998 (the "Current Balance Sheet") and December 31, 1997 and 1996, and
the related statements of income for the years then ended (all such balance
sheets and statements collectively, the "Financial Statements").

                                       11
<PAGE>
          3.07-2 The Financial Statements present fairly

               (a) the financial position of TG3 as of the dates indicated and

               (b) the results of operations for the periods then ended.

     3.08 Receivables. Schedule 3.08 separately lists all receivables of TG3
from the Dental Practice or otherwise (including management fees receivable,
accounts receivable, loans receivable and advances) as of March 31, 1998. Each
of the receivables listed on Schedule 3.08, and each of the receivables that has
arisen since March 31, 1998 has arisen only from bona fide transactions in the
ordinary course of business and is not subject to any offset or counterclaim.

     3.09 Prepaid Expenses and Other. Schedule 3.09 lists all prepaid expenses
and deferred charges of TG3 and of the Dental Practice, reflected on the Current
Balance Sheet as well as the items included in the Other Assets line, if any, on
the Current Balance Sheet.

     3.10 Personal Property. Section 1.01-1 and Schedule 3.10 together generally
describe all the tangible personal property owned or leased by TG3 and used in
the Dental Practice, other than excluded assets listed in Schedule 1.02-2
("Tangible Personal Property"). Schedule 3.10 lists the book value of the
Tangible Personal Property as of March 31, 1998.

     3.11 Payables. Schedule 3.11 lists all accounts payable and other accrued
liabilities of TG3 as of March 31, 1998, other than payables for brokers' and
attorneys' fees and other expenses of this transaction and accrued liabilities
for taxes based on income or revenues of TG3.

     3.12 Indebtedness. Schedule 3.12 lists all indebtedness of TG3 and the
Professional Corporation as of June 30, 1998 incurred in connection with the
business, operations or assets of the Dental Practice or the repayment of which
is secured by the assets of the Dental Practice. For each item of indebtedness,
Schedule 3.12 shows the name of lender and the principal balance.

     3.13 Other Liabilities. Except as listed on Schedule 3.13, neither TG3 nor
the Professional Corporation has any liability or obligation (whether absolute,
accrued, contingent or other, and whether due or to become due), which is not
accrued, reserved against or disclosed in the Current Balance Sheet, other than
liabilities incurred in the ordinary course of business consistent with past
practice, which individually or in the aggregate would not have a Material
Adverse Effect.

     3.14 Absence of Certain Changes or Events. Since the date of the Current
Balance Sheet, there has not been with respect to TG3 or the Dental Practice:

          3.14-1 Any Material Adverse Change or any event, occurrence,
development or state of circumstances or facts which could reasonably be
expected to result in a Material Adverse Change;

          3.14-2 Any damage, destruction or casualty loss, whether insured
against or not, to any assets or properties associated with the Dental Practice;

                                       12
<PAGE>
          3.14-3 Any increase in the rate or terms of compensation payable or to
become payable by TG3 to its key employees; any increase in the rate or terms of
any bonus, insurance, pension or other employee benefit plan, payment or
arrangement made to, for or with any such key employees; any special bonus or
remuneration paid; or any written employment contract executed or amended;

          3.14-4 Any entry into any agreement, commitment or transaction
(including, without limitation, any borrowing, capital expenditure or capital
financing or any amendment, modification or termination of any existing
agreement, commitment or transaction) by TG3 or the Professional Corporation,
except agreements, commitments or transactions in the ordinary course of
business and consistent with past practices or as expressly contemplated in this
Agreement;

          3.14-5 Any conduct of business which is outside the ordinary course of
business or not substantially in the manner that TG3 previously provided
management services to the Dental Practice;

          3.14-6 Any purchase or other acquisition of property, any sale, lease
or other disposition of property, or any expenditure, except in the ordinary
course of business;

          3.14-7 Any incurrence of any noncontract liability which, either
singly or in the aggregate is material to the business, results of operations,
financial condition or prospects of the Dental Practice;

          3.14-8 Any encumbrance or consent to encumbrance of any property or
assets of TG3 except in the ordinary course of business; or

          3.14-9 Any change in the assets, liabilities, licenses, permits or
franchises of TG3, or in any agreement to which TG3 is a party or is bound,
which has had or reasonably could be expected to have a Material Adverse Effect.

     3.15 Leases. Schedule 3.15 contains a complete and accurate list of all
Leases of real property used or useful in the business of TG3, including the
lease at the Dental Practice location, a description of the real property
covered thereby (the "Real Property"), the term of each Lease and the monthly
payments under the Lease. Complete and accurate copies of all Leases have been
delivered to GD Sub.

     3.16 Certain Contracts and Arrangements. Schedule 3.16, which is organized
by type of agreement, contains a complete and accurate list of all Contracts of
the following types to which TG3 or the Professional Corporation is a party or
by which TG3 or the Professional Corporation is bound which relate to or are
associated with the Dental Practice:

          3.16-1 any mortgage, note or other instrument or agreement relating to
the borrowing of money or the incurrence of indebtedness by TG3 or the
Professional Corporation or TG3's guaranty of any obligation for the borrowing
of money;

                                       13
<PAGE>
          3.16-2 contracts, agreements, purchase orders or acknowledgment forms
for the purchase, sale, lease or other disposition of capital assets or more
than $20,000 of other equipment or materials;

          3.16-3 contracts or agreements for the performance of services,
including but not limited to the TG3 Management Agreement;

          3.16-4 contracts or agreements for the joint performance of work or
services and all other partnership or joint venture agreements;

          3.16-5 contracts or agreements with agents, brokers, consignees, sales
representatives or distributors relating to the sale of the services of TG3; and

          3.16-6 any other contract, instrument, agreement or obligation not
described on any other Schedule to which TG3 or the Professional Corporation is
a party or by which either of them is bound and which contains material
unfulfilled obligations of TG3, including but not limited to the TG3 Assignable
Option Agreement.

Complete and accurate copies of all Contracts have been delivered to GD Sub.

     3.17 Status of Contracts and Leases.

          3.17-1 Each of the Contracts and Leases listed on Schedules 3.10, 3.15
and 3.16 is valid, binding and enforceable by TG3 in accordance with its terms
and is in full force and effect. There is no existing default or violation by
TG3 under any Contract or Lease and no event has occurred which (whether with or
without notice, lapse of time or both) would constitute a default of TG3 under
any Contract or Lease. There is no pending or threatened proceeding which would
interfere with the quiet enjoyment of any Real Property of which TG3 is lessee
or sublessee which is used by the Dental Practice.

          3.17-2 All other parties to the Contracts and Leases have consented or
prior to the Closing will have consented (where such consent is necessary) to
the consummation of the transaction contemplated by this Agreement without
requiring modification of TG3's rights or obligations under any Contract or
Lease.

          3.17-3 TG3 is not aware of any default by any other party to any
Contract or Lease or of any event which (whether with or without notice, lapse
of time or both) would constitute a default by any other party with respect to
obligations of that party under any Contract or Lease, and, to the knowledge of
TG3, there are no facts that exist indicating that any of the Contracts or
Leases may be totally or partially terminated or suspended by the other parties.

          3.17-4 Neither TG3 nor the Professional Corporation is a party to, nor
is it bound by, any contract or agreement that TG3 can reasonably foresee will
result in any material loss to TG3 or the Dental Practice upon the performance
thereof (including any material liability for penalties or damages, whether
liquidated, direct, indirect, incidental or consequential), unless such contract
or

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<PAGE>
agreement is terminable by TG3 or the Professional Corporation on 60 or fewer
days notice at any time without penalty.

     3.18 Title and Condition of Tangible Assets.

          3.18-1 TG3 owns all of the Tangible Personal Property except the
leased property free and clear of all mortgages, pledges, security interests,
claims, charges or other encumbrances or restrictions of any kind, except

               (a) liens disclosed on the Current Balance Sheet,

               (b) security interests or liens securing payment of Assumed
Liabilities or

               (c) liens for taxes not yet due or being contested in good faith
(and for which adequate accruals or reserves have been established on the
Current Balance Sheet).

          3.18-2 TG3 has good and absolute title to the Tangible Personal
Property except the leased property. No Partner, Professional Corporation or
shareholder thereof, nor any other person or entity has any interest in any
property, real or personal, tangible or intangible, used in or pertaining to the
Dental Practice, other than indirectly as a partner of TG3. The immediately
preceding sentence shall not apply to patient charts, files and patient records
and contracts for the provision of dentistry services that may be owned or held
by the Professional Corporation.

          3.18-3 All Tangible Personal Property has been maintained and operated
in accordance with manufacturer's specifications and prudent industry practices,
is in a good state of maintenance and repair, ordinary wear and tear excepted,
and is adequate for the conduct of TG3's business.

          3.18-4 There are no developments affecting any of the Real Property or
Tangible Personal Property pending or, to the knowledge of TG3, threatened which
might materially detract from the value of such property or assets, materially
interfere with any present or intended use of any such property or assets or
materially adversely affect the marketability of such properties or assets.

          3.18-5 At the Closing, GD Sub will acquire good title to all the
Assets, free and clear of all mortgages, pledges, security interests, claims,
charges or other encumbrances or restrictions of any kind, except for security
interests or liens securing payment of Assumed Liabilities.

     3.19 Insurance. Schedule 3.19 contains a complete and accurate list of all
policies (other than the malpractice insurance policy in effect for the
Professional Corporation) of liability, fire, worker's compensation and other
forms of insurance insuring TG3, the Professional Corporation, their respective
employees, and assets or operations of the Dental Practice, setting forth the
applicable deductible amounts (the foregoing policies including the malpractice
insurance policy of the Professional Corporation are hereinafter collectively
referred to as the "Policies"). All the Policies are valid, enforceable and in
full force and effect, all premiums with respect to the Policies covering all
periods up to and including the date as of which this representation is being
made have been paid and no notice of cancellation or termination has been
received with respect to any Policy. The Policies are

                                       15
<PAGE>
sufficient for compliance with all requirements of law and of agreements to
which TG3 and the Professional Corporation are parties and provide insurance for
the risks and in the amounts and types of coverage usually obtained by persons
using or holding similar properties in similar businesses. There are no
unresolved claims for insurance payment under any of the Policies. True and
complete copies of the Policies and all endorsements thereto have been delivered
to GD Sub.

     3.20 Taxes.

          3.20-1 Returns. TG3 has filed all federal, state and other returns,
reports and information returns required to be filed by it with respect to Taxes
(as defined below) (collectively, the "Returns") and has timely paid all Taxes
shown to be due on the Returns. All Returns filed are complete and accurate in
all material respects, and no additional Taxes are owed by TG3 with respect to
the periods covered by the Returns. TG3 has provided GD Sub with complete and
accurate copies of TG3's Returns for 1995 and 1996.

          3.20-2 Taxes Paid or Reserved. All deficiencies in Taxes asserted or
assessments made by any taxing authority have been fully paid or finally
settled, excluding property taxes that are not yet due. All Taxes which TG3 or
the Professional Corporation has been required to collect or withhold have been
withheld or collected and, to the extent required, have been paid to the proper
taxing authority.

          3.20-3 Definition. "Taxes" means all taxes, charges, fees, levies or
other assessments including, without limitation, income, excise, property,
sales, use and franchise taxes, imposed by the United States or any state,
county, local or foreign government or subdivision or agency thereof, and
including any interest, penalties or additions.

     3.21 No Restrictions. No contract or agreement to which TG3 is a party or
is bound or to which any of its properties or assets is subject limits the
freedom of TG3 to compete in any line of business or with any person.

     3.22 Permits and Licenses. Except as set forth on Schedule 3.22, TG3, the
Professional Corporation and Ghazal hold and at all times have held, all
licenses, permits, franchises, easements and authorizations (collectively,
"Permits") necessary for the lawful conduct of the Dental Practice pursuant to
all applicable statutes, laws, ordinances, rules and regulations of all
governmental bodies, agencies and other authorities having jurisdiction over it
or any part of its operations, except where the failure to hold any Permit,
singly or in the aggregate, either alone or with the giving of notice or the
passage of time or both, would not have a Material Adverse Effect. TG3, the
Professional Corporation and Ghazal are in compliance with all the terms of each
Permit, and there are no claims of violation by any such party of any Permit.

     3.23 Certain Payments. Neither TG3 nor the Professional Corporation or any
Partner, directly or indirectly, on behalf of or with respect to the Dental
Practice or its operations made or received any payment that was not legal to
make or receive under federal, state or local laws of the United States or any
other country or territory.

                                       16
<PAGE>
     3.24 Environmental Conditions.

          3.24-1 Compliance. TG3 has operated the Dental Practice and maintained
the Assets, including without limitation the Real Property, in compliance with
all Environmental Laws. All wastes generated in connection with the Dental
Practice are and have been transported and disposed of off site in compliance
with all Environmental Laws. Except as otherwise required for the normal
operation of the Dental Practice, no Hazardous Substance is or has been
generated, manufactured, treated, stored, transported, used or otherwise handled
on the Real Property or in connection with the Dental Practice.

          3.24-2 Definitions. As used in this Agreement,

               (a) "Environmental Law" means any federal, state or local
statute, ordinance or regulation pertaining to the protection of human health or
the environment and any applicable orders, judgments, decrees, permits, licenses
or other authorizations or mandates under such statutes, ordinances or
regulations, and

               (b) "Hazardous Substance" means any hazardous, toxic, radioactive
or infectious substance, material or waste as defined, listed or regulated under
any Environmental Law, and includes without limitation petroleum oil and its
fractions.

     3.25 Consents and Approvals. Except as set forth on Schedule 3.25, no
consent, approval or authorization of any court, regulatory authority,
governmental body, or any other entity or person not a party to this Agreement
is required for the consummation of the transactions described in this Agreement
by TG3 or Partners. TG3 and Partners have obtained, or shall have obtained prior
to the Closing, all consents, authorizations or approvals of any third parties
required in connection with the execution, delivery or performance of this
Agreement by TG3 or Partners or the consummation of the transaction contemplated
by this Agreement. TG3 has made all registrations or filings with any
governmental authority required for the execution or delivery of this Agreement
or the consummation of the transaction contemplated hereby.

     3.26 Records. The books of account of TG3 and the Professional Corporation
are complete and accurate in all material respects, and there have been no
transactions involving the business of TG3 and the Professional Corporation
which properly should have been set forth therein and which have not been
accurately so set forth. Complete and accurate copies of such books have been
made available to GD Sub.

     3.27 Investment Representations. TG3 is acquiring the Shares and each
Partner is acquiring beneficial ownership of the Shares for investment for its,
his or her own account, and not with a view to, or for resale in connection
with, any distribution of the Shares, other than a possible distribution of the
Shares from TG3 to Partners. Neither TG3 nor any Partner is a party to any
contract, undertaking, agreement or arrangement with any person to sell,
transfer or grant participation to any such person or any third party with
respect to the Shares. TG3 and Partners acknowledge and understand that the
Shares are being offered and sold without registration under the 1933 Act or any
state securities law based on exemptions provided under such laws, and that the
representations

                                       17
<PAGE>
contained in this Agreement are being relied upon by GD Sub and GDSC in
connection with those exemptions. TG3 and Partners further acknowledge and agree
that the Shares are "restricted securities" under federal securities laws and as
such may not be sold or disposed of unless they are registered under the 1933
Act and all applicable state securities laws or unless, in the opinion of
counsel acceptable to GD Sub and GDSC, exemptions from the registration
requirements of the 1933 Act and all applicable state securities laws are
available. In this regard, TG3 and Partners acknowledge that GDSC is under no
obligation to register the Shares, that the Shares will not be eligible for
resale in the public market pursuant to Rule 144 under the 1933 Act until one
year after the Closing Date, and that TG3 and Partners will bear the economic
risk of ownership of the Shares at least until that time. TG3 and Partners
consent to having appropriate legends placed on the certificates representing
the Shares relating to this restriction on transfer.

     3.28 Access to Information. Each Partner has received and carefully
reviewed GDSC's Annual Report on Form 10-KSB for the year ended December 31,
1997, GDSC's Quarterly Report on Form 10-QSB for the quarter ended March 31,
1998, and the Registration Statement. Each Partner believes it or she has
received all of the information it or she considers necessary or appropriate for
deciding whether to acquire shares of GDSC Common Stock. Each Partner further
represents that he or she has had an opportunity to ask questions and receive
answers from GDSC regarding GDSC, its business and financial condition, and the
terms and conditions of the Agreement.

     3.29 Sophistication. Partners, and each of them, together with their
purchaser representative, if any, have such knowledge and experience in
financial and business matters that they are capable of evaluating the merits
and risks of an investment in the Shares and have the capacity to protect their
own interests in connection with the transaction.

     3.30 Accredited Investor. Ghazal and Thorne either (a) have an individual
net worth, or joint net worth with his or her spouse, of in excess of $1
million, or (b) had an individual income in excess of $200,000 in each of the
two most recent years or joint income with his or her spouse in excess of
$300,000 in each of those years and has a reasonable expectation of reaching the
same income level in the current year and in the next year, and therefore is an
"accredited investor" within the meaning of Rule 501 of Regulation D under the
1933 Act. Partners are the sole equity owners of TG3, and therefore TG3 is also
an "accredited investor" within the meaning of Rule 501 of Regulation D under
the 1933 Act.

     3.31 Reliance. TG3 and Partners recognize and agree that, notwithstanding
any investigation by GD Sub, GD Sub is relying upon the representations and
warranties made by TG3 and Partners in this Agreement.

     3.32 Accuracy of Representations and Warranties. None of the
representations or warranties of TG3 and Partners contains or will contain any
untrue statement of any material fact or omits or misstates a material fact
necessary to make the statements contained in this Agreement not misleading. TG3
and Partners do not know of any fact that has resulted or that, in the
reasonable judgment of TG3 or Partners will result, in any material adverse
change in TG3's business, results of operation, financial condition or prospects
that has not been set forth in this Agreement.

                                       18
<PAGE>
                                   ARTICLE IV

                          Covenants of TG3 and Partners

     4.01 Access to Properties, Books and Records. Prior to the Closing Date,
TG3 shall, at GD Sub's request, afford or cause to be afforded to the agents,
attorneys, accountants and other authorized representatives of GD Sub reasonable
access during normal business hours to all employees, properties, books and
records of TG3 and the Professional Corporation and shall permit such persons,
at GD Sub's expense, to make copies of such books and records. TG3 shall deliver
to GD Sub monthly financial statements of TG3 promptly after they become
available. GDSC and GD Sub shall treat, and shall cause all of their agents,
attorneys, accountants and other authorized representatives to treat, all
information obtained pursuant to this Section 4.01 as confidential in accordance
with Section 10.01 hereof. No investigation by GDSC or GD Sub or any of their
authorized representatives pursuant to this Section 4.01 shall affect any
representation, warranty or closing condition of any party hereto or GD Sub's
rights to indemnification pursuant to Section 9.02 hereof.

     4.02 Negative Covenants. Except as otherwise permitted by this Agreement or
with the prior written consent of GD Sub, prior to the Closing Date, TG3 shall
not, in connection with the Dental Practice:

          4.02-1 Incur additional debt for borrowed money (including without
limitation obligations under leases for real or personal property whether or not
required to be capitalized under generally accepted accounting principles),
incur or increase any obligation or liability (fixed, contingent or other,
including without limitation liabilities as a guarantor or otherwise with
respect to obligations of others) except in the ordinary and usual course of
business and consistent with past practices, forgive or release any debt or
claim, give any waiver of any right of material value or voluntarily suffer any
extraordinary loss;

          4.02-2 Make any payment to discharge or satisfy any lien or
encumbrance or pay any obligation or liability (fixed or contingent) other than
(a) current liabilities (including the current portion of any long-term
liabilities) included in the Financial Statements and (b) current liabilities
incurred or maturing since the date of the Current Balance Sheet in the ordinary
course of business;

          4.02-3 Admit any new or additional partner or declare, pay or make any
distribution of money or property to the Partners other than ordinary
distributions consistent with past practices;

          4.02-4 Mortgage, pledge, otherwise encumber or subject to lien any of
its assets or properties, tangible or intangible, or commit itself to do any of
the foregoing;

          4.02-5 Except in the ordinary and usual course of its business and in
each case for fair consideration, dispose of, or agree to dispose of, any of its
assets or lease or license to others, or agree so to lease or license, any of
its assets;

          4.02-6 Acquire any assets which would be material to the Dental
Practice other than assets acquired in the ordinary and usual course of business
and consistent with past practices;

                                       19
<PAGE>
          4.02-7 Enter into any transaction or contract or make any commitment
to do the same, except in the ordinary and usual course of business and not
requiring the payment in any case of an amount in excess of $15,000 annually;

          4.02-8 Increase the wages, salaries, compensation, pension or other
benefits payable, or to become payable by it, to any of its employees or agents,
including without limitation any bonus payments or severance or termination pay,
other than increases in wages and salaries required by employment arrangements
existing on the date hereof or otherwise in the ordinary and usual course of its
business;

          4.02-9 Implement or agree to any implementation of or amendment or
supplement to any employee profit sharing, pension, bonus, commission,
incentive, retirement, medical reimbursement, life insurance, deferred
compensation or any other employee benefit plan or arrangement;

          4.02-10 Change its accounting methods, policies or practices; or

          4.02-11 Agree or commit to do any of the foregoing.

     4.03 Affirmative Covenants. Except as otherwise permitted by this Agreement
or with the prior written consent of GD Sub, prior to the Closing Date, TG3
shall:

          4.03-1 Operate the Dental Practice, including collecting receivables
and paying payables, as presently operated and only in the ordinary course and
consistent with past practices;

          4.03-2 Advise GD Sub in writing of any litigation or administrative
proceeding that challenges or otherwise materially affects the transactions
contemplated hereby and of any Material Adverse Change or any event, occurrence
or circumstance which is likely to cause a Material Adverse Change;

          4.03-3 When the consent of any third party to the transactions
contemplated by this Agreement is required under the terms of any contract or
agreement material to the Dental Practice to which TG3 is a party or by which
TG3 is bound, use its best efforts to obtain such consent on terms and
conditions not materially less favorable than those in effect on the date
hereof;

          4.03-4 Use its best efforts to maintain all of the Tangible Personal
Property in good operating condition, reasonable wear and tear excepted,
consistent with past practices, and take all steps reasonably necessary to
maintain its intangible assets;

          4.03-5 Not cancel or change any policy of insurance (including
self-insurance) or fidelity bond or any policy or bond providing substantially
the same coverage;

          4.03-6 Maintain, consistent with past practices, all inventories,
spare parts, office supplies and other expendable items;

                                       20
<PAGE>
          4.03-7 Use its best efforts to retain all employees;

          4.03-8 Maintain its books and records in accordance with past
practices;

          4.03-9 Pay and discharge all taxes, assessments, governmental charges
and levies imposed upon it, its income or profits or upon any property belonging
to it, in all cases prior to the date on which penalties attach thereto; and

          4.03-10 Comply with all laws, rules and regulations applicable to it
and to the Dental Practice.

     4.04 No Negotiations With Others. Except as otherwise permitted by this
Agreement or with the prior written consent of GD Sub, TG3 and Partners shall
refrain, and shall cause TG3's employees and any investment banker, attorney,
accountant or other agent retained by either of them to refrain, from initiating
or soliciting any inquiries or making any proposals with respect to, or engaging
in negotiations concerning, or providing any confidential information or data to
or having any discussions with any person relating to, any acquisition, business
combination or purchase of all or any significant portion of the assets of, or
any equity interest in, TG3. TG3 and Partners will immediately cease and cause
to be terminated any existing activities, discussions or negotiations with any
parties conducted heretofore with respect to any of the foregoing.

     4.05 Employees. Effective as of the close of business on the Closing Date,
TG3 shall terminate all of its employees at the Dental Practice. Except as
expressly assumed by GD Sub under this Agreement, TG3 shall be responsible for
and shall pay and discharge all obligations to such employees arising out of or
in connection with their employment prior to Closing.

                                    ARTICLE V

                                 Joint Covenants

     GD Sub, TG3 and Partners covenant and agree that they will act in
accordance with the following:

     5.01 Governmental Consents. Promptly following the execution of this
Agreement, the parties will proceed to prepare and file with the appropriate
governmental authorities any requests for approval or waiver, if any, that are
required from governmental authorities in connection with the transactions
contemplated hereby, and the parties shall diligently and expeditiously
prosecute and cooperate fully in the prosecution of such requests for approval
or waiver and all proceedings necessary to secure such approvals and waivers.

     5.02 Best Efforts; No Inconsistent Action. Each party will use its best
efforts to effect the transactions contemplated by this Agreement and to fulfill
the conditions to the obligations of the other parties set forth in Article 6 or
7 of this Agreement. No party will take any action inconsistent with its
obligations under this Agreement or that could hinder or delay the consummation
of the transactions

                                       21
<PAGE>
contemplated by this Agreement, except that nothing in this Section 5.02 shall
limit the rights of the parties under Articles 6, 7 and 8.

                                   ARTICLE VI

                       Conditions to Obligations of GD Sub

     The obligations of GD Sub under Article 1 are, at its option, subject to
satisfaction, at or prior to the Closing, of each of the following conditions:

     6.01 Governmental Approvals. All authorizations, consents and approvals of
all governmental agencies and authorities required to be obtained in order to
permit consummation of the transactions contemplated by this Agreement shall
have been obtained and be satisfactory in form and content to GD Sub.

     6.02 Consents. TG3 shall have obtained the third-party consents required
under the terms of the Contracts and Leases, except for those Contracts and
Leases for which the necessity of obtaining consent to assignment is waived by
GD Sub as indicated on Schedule 3.25, and such consents shall not have required
any change to the terms and conditions of the Contracts and Leases other than
changes consented to in writing by GD Sub.

     6.03 Representations, Warranties and Covenants.

          6.03-1 All representations and warranties of TG3 and Partners made in
this Agreement, or in any certificate delivered pursuant hereto, shall in all
material respects be true and complete on and as of the Closing Date with the
same force and effect as if made on and as of that date.

          6.03-2 All of the terms, covenants and conditions to be complied with
and performed by TG3 and Partners at or prior to the Closing shall in all
material respects have been complied with or performed thereby.

          6.03-3 GD Sub shall have received a certificate of Partners, dated as
of the Closing Date, to the effect that the representations and warranties of
TG3 and Partners contained in this Agreement are in all material respects true
and complete on and as of the Closing Date as though made on and as of the
Closing Date and that TG3 and Partners have in all material respects complied
with or performed all terms, covenants and conditions to be complied with or
performed by him at or prior to the Closing.

     6.04 Adverse Proceedings. No suit, action, claim or governmental proceeding
shall have been instituted or threatened against, and no order, decree or
judgment of any court, agency or other governmental authority shall have been
rendered against, GDSC, GD Sub, TG3 or either Partner to restrain or prohibit,
or obtain damages in respect of, this Agreement or the transactions contemplated
by this Agreement.

                                       22
<PAGE>
     6.05 No Adverse Change. There shall not have been any Material Adverse
Change.

     6.06 Management Agreement. The TG3 Management Agreement assigned by TG3 to
GD Sub pursuant to Section 1.01-6 shall have been amended and restated as a
Management Agreement with GD Sub in the form attached hereto as Exhibit C, and
the Professional Corporation shall have executed and delivered such a Management
Agreement.

     6.07 Shares Acquisition Agreement. The TG3 Assignable Option Agreement
assigned by TG3 to GD Sub pursuant to Section 1.01-6 shall have been amended and
restated as a Shares Acquisition Agreement relating to the stock of the
Professional Corporation in the form attached hereto as Exhibit D, and the
Professional Corporation and Ghazal shall have executed and delivered such
Shares Acquisition Agreement.

     6.08 Dentist Employment Agreements. Ghazal shall have executed and
delivered a Dentist Employment Agreement with the Professional Corporation in
the form attached hereto as Exhibit E.

     6.09 Closing of Related Transactions. The transactions contemplated by the
following agreements shall have closed prior to the Closing: Asset Purchase
Agreement dated June 30, 1998 by and among GDSC, GD Sub, PDS and the
shareholders of PDS; Asset Purchase Agreement dated June 30, 1998 by and among
GDSC, GD Sub, Orange Dental Services and the partners of Orange Dental Services;
and Asset Purchase Agreement dated June 30, 1998 by and among GDSC, GD Sub and
Bryan Watanabe D.D.S., Inc.

     6.10 Actions Satisfactory to GD Sub's Counsel. All actions, proceedings,
instruments and documents required to be carried out by this Agreement, or
incidental hereto, and all other relevant legal matters shall be reasonably
satisfactory to counsel for GD Sub.

                                   ARTICLE VII

                        Conditions to Obligations of TG3

     The obligations of TG3 under Article I are, at its option, subject to
satisfaction, at or prior to the Closing, of each of the following conditions:

     7.01 Representations, Warranties and Covenants.

          7.01-1 All representations and warranties of GDSC and GD Sub made in
this Agreement and in any certificate delivered pursuant hereto shall in all
material respects be true and complete on and as of the Closing Date with the
same force and effect as if made on and as of that date.

          7.01-2 All of the terms, covenants and conditions to be complied with
and performed by GDSC and GD Sub on or prior to the Closing shall in all
material respects have been complied with or performed by GDSC and GD Sub.

                                       23
<PAGE>
          7.01-3 TG3 shall have received a Certificate of GDSC and GD Sub, dated
as of the Closing Date, executed by the President or other authorized officer of
GDSC and GD Sub, to the effect that the representations and warranties of GDSC
and GD Sub contained in this Agreement are in all material respects true and
complete on and as of the Closing Date as though made on and as of the Closing
Date and that GDSC and GD Sub have in all material respects complied with or
performed all terms, covenants and conditions to be complied with or performed
by them at or prior to the Closing.

     7.02 Adverse Proceedings. No suit, action, claim or governmental proceeding
shall have been instituted or threatened against, and no order, decree or
judgment of any court, agency or other governmental authority shall have been
rendered against, GDSC, GD Sub, TG3 or any Partner to restrain or prohibit this
Agreement or the transactions contemplated by this Agreement.

     7.03 Stock Price. The Stock Price shall not be less than $4.00 per share of
GDSC Common Stock.

                                  ARTICLE VIII

                                   Termination

     8.01 Right of Parties to Terminate. This Agreement may be terminated:

          8.01-1 by GD Sub, if any of the authorizations, consents, approvals,
filings or registrations described in Section 6.01 hereof, other than as may
pertain to those Contracts and Leases for which the necessity of obtaining
consent to assignment is waived by GD Sub as indicated on Schedule 3.25, shall
have been denied, not permitted to go into effect or obtained on terms not
reasonably satisfactory to GD Sub and all reasonable final appeals shall have
been exhausted;

          8.01-2 by GD Sub, if TG3 or Partners shall have breached any of their
obligations hereunder in any material respect;

          8.01-3 by TG3, if GD Sub shall have breached any of its obligations
hereunder in any material respect; or

          8.01-4 by either TG3 or GD Sub, by written notice to the other party,
if the Closing shall not have occurred on or prior to March 31, 1999; provided,
however, that the right to terminate this Agreement under this Section 8.01-4
shall not be available to any party whose failure to fulfill or perform any
obligation under this Agreement has been the cause of, or resulted in, the
failure of the Closing to occur on or before such date.

     8.02 Effect of Termination. If either GD Sub or TG3 decides to terminate
this Agreement pursuant to Section 8.01, such party shall promptly give written
notice to the other party to this Agreement of such decision. In the event of a
termination pursuant to Section 8.01, the parties hereto shall be released from
all liabilities and obligations arising under this Agreement (other than those
described in Article 10 hereof) with respect to the matters contemplated by this
Agreement, other than for damages arising from a breach of this Agreement.

                                       24
<PAGE>
                                   ARTICLE IX

                            Survival; Indemnification

     9.01 Survival. All representations, warranties, covenants and agreements
made in this Agreement or in any schedule, certificate or assignment delivered
in accordance with this Agreement (collectively, the "Related Documents") shall
survive any investigation by or on behalf of any party, the execution and
delivery of this Agreement, the consummation of the transactions contemplated
hereby and any termination or expiration of this Agreement for a period of three
and one-half years following the Closing Date and after such period shall be
terminated and extinguished, except insofar as the damaged party shall have
asserted in writing a claim setting forth with reasonable specificity facts and
circumstances relating thereto prior to the expiration of such period in which
event the party liable shall remain liable with respect to such claim.

     9.02 Indemnification by TG3 and Partners.

          9.02-1 Notwithstanding any investigation by GDSC or GD Sub, from and
after the Closing, TG3 and Partners shall indemnify, hold harmless and, to the
extent provided in Section 9.04-1, defend GDSC, GD Sub, and their respective
subsidiaries, shareholders, affiliates, officers, directors, employees, agents,
successors and assigns (collectively, "GD Sub's Indemnified Persons") from and
against, and reimburse each of GD Sub's Indemnified Persons with respect to, any
and all losses, damages, liabilities, costs and expenses, including interest
from the date of such loss to the time of payment, penalties and reasonable
attorneys' fees (collectively, "Damages") incurred by any of GD Sub's
Indemnified Persons by reason of or arising out of or in connection with:

               (a) any material breach or inaccuracy of any representation or
warranty of TG3 or Partners made in this Agreement or any Related Document;

               (b) any failure by TG3 or Partners to perform any covenant
required to be performed by them pursuant to this Agreement or any Related
Document after reasonable opportunity to cure; or

               (c) any liability or obligation of TG3 or Partners arising out of
or in connection with the ownership, use, condition, maintenance or operation of
the Dental Practice or the Assets by TG3 on or prior to the Closing, in either
case not expressly assumed by GD Sub in accordance with the terms of this
Agreement, and specifically including any liability to pay cash to a terminated
employee on account of accrued vacation time.

          9.02-2 This indemnification extends to any Damages suffered by any of
GD Sub's Indemnified Persons, whether or not a claim is made against any of GD
Sub's Indemnified Persons by any third party.

                                       25
<PAGE>
     9.03 Indemnification by GD Sub.

          9.03-1 Notwithstanding any investigation by TG3 or Partners, from and
after the Closing, GDSC and GD Sub shall indemnify, hold harmless and, to the
extent provided in Section 9.04-1, defend TG3, Partners, and their respective
partners, affiliates, officers, employees, agents, successors and assigns
(collectively, "TG3's Indemnified Persons") from and against, and reimburse each
of TG3's Indemnified Persons with respect to, any and all Damages incurred by
any of TG3's Indemnified Persons by reason of or arising out of or in connection
with:

               (a) any material breach or inaccuracy of any representation or
warranty of GDSC or GD Sub made in this Agreement or any Related Document;

               (b) any failure by GDSC or GD Sub to perform any covenant
required to be performed by them pursuant to this Agreement or any Related
Document after reasonable opportunity to cure; or

               (c) any liability or obligation of TG3 to any third party
expressly assumed by GD Sub in accordance with the terms of this Agreement.

          9.03-2 This indemnification extends to any Damages suffered by any of
TG3's Indemnified Persons whether or not a claim is made against any of TG3's
Indemnified Persons by any third party.

     9.04 Indemnification Procedure.

          9.04-1 Third Party Claims.

               (a) Each indemnified party shall, with reasonable promptness
after obtaining knowledge thereof, provide any indemnifying party against whom a
claim for indemnification is to be made under this Article 9 with written notice
of all third party actions, suits, proceedings, claims, demands or assessments
that may be subject to the indemnification provisions of this Article 9
(collectively, "Third Party Claims"), including, in reasonable detail, the basis
for the claim, the nature of Damages and a good faith estimate of the amount of
Damages.

               (b) Each indemnifying party shall have 15 days after its receipt
of the claim notice to notify the indemnified party in writing whether the
indemnifying party agrees that the claim is subject to this Article 9 and, if
so, whether the indemnifying party elects, jointly with any other indemnifying
party notified under Section 9.04-1(a), to undertake, conduct and control,
through counsel of its or their choosing (subject to the consent of the
indemnified party, such consent not to be withheld unreasonably) and at its or
their sole risk and expense, the good faith settlement or defense of the Third
Party Claim.

               (c) If within 15 days after its receipt of the claim notice an
indemnifying party notifies the indemnified party that it elects to undertake
the good faith settlement or defense of the Third Party Claim, the indemnified
party shall cooperate reasonably with the indemnifying party

                                       26
<PAGE>
in connection therewith including, without limitation, by making available to
the indemnifying party all relevant information material to the defense of the
Third Party Claim. The indemnified party shall be entitled to participate in the
settlement or defense of the Third Party Claim through counsel chosen by the
indemnified party, at its expense, and to approve any proposed settlement that
would impose any obligation or duty on the indemnified party, which approval
may, in the sole discretion of the indemnified party, be withheld. So long as an
indemnifying party is contesting the Third Party Claim in good faith and with
reasonable diligence, the indemnified party shall not pay or settle the Third
Party Claim. Notwithstanding the foregoing, the indemnified party shall have the
right to pay or settle any Third Party Claim at any time, provided that in such
event it waives any right to indemnification therefor by the indemnifying party.

               (d) If an indemnifying party does not provide notice that it
elects to undertake the good faith settlement or defense of the Third Party
Claim, or if an indemnifying party fails to contest the Third Party Claim or
undertake or approve settlement, in good faith and with reasonable diligence,
the indemnified party shall thereafter have the right to contest, settle or
compromise the Third Party Claim at its exclusive discretion, at the risk and
expense of the indemnifying party, and the indemnifying party will thereby waive
any claim, defense or argument that the indemnified party's settlement or
defense of such Third Party Claim is in any respect inadequate or unreasonable.

               (e) A party's failure to give timely notice will not constitute a
defense, in part or in whole, to any claim for indemnification by such party,
except if, and only to the extent that, such failure results in any material
prejudice to the indemnifying party.

          9.04-2 Non-Third Party Claims.

               (a) Each indemnified party shall, with reasonable promptness,
deliver to any indemnifying party against whom a claim for indemnification is to
be made under this Article 9 written notice of all claims for indemnification
under this Article 9, other than Third Party Claims, including, in reasonable
detail, the basis for the claim, the nature of Damages and a good faith estimate
of the amount of Damages.

               (b) Each indemnifying party shall have 30 days after its receipt
of the claim notice to notify the indemnified party in writing whether or not
the indemnifying party accepts liability for all or any part of the Damages
described in the claim notice. If the indemnifying party does not so notify the
indemnified party, the indemnifying party shall be deemed to accept liability
for all the Damages described in the claim notice.

               (c) A party's failure to give timely notice will not constitute a
defense, in part or in whole, to any claim for indemnification by such party,
except if, and only to the extent that, such failure results in any material
prejudice to the indemnifying party.

     9.05 Right of Offset. At the election of GD Sub, any liability of TG3 or
any Partner under Section 9.02 which has been established by agreement,
litigation or in accordance with the procedure set forth in Section 9.04 may be
satisfied by offsetting such liability against any Earnout Consideration

                                       27
<PAGE>
then due or that subsequently becomes due. For this purpose, a liability shall
not be deemed to have been established in accordance with the procedure set
forth in Section 9.04 if TG3 or the Partner has asserted under Section 9.04-1(b)
that the liability is not subject to this Article 9 and the question has not
been resolved by agreement or litigation.

     9.06 Rights Not Exclusive. An indemnified party's rights to indemnification
under this Article 9 are in addition to, and not in lieu of, any other rights to
which the indemnified party may be entitled at law or in equity.

                                    ARTICLE X

                         Confidentiality; Press Releases

     10.01 Confidentiality.

          10.01-1 No information concerning TG3 not previously disclosed to the
public or in the public domain that has been furnished to or obtained by GDSC or
GD Sub under this Agreement or in connection with the transactions contemplated
hereby shall be disclosed to any person other than in confidence to employees,
legal counsel, financial advisers or independent public accountants of GDSC or
GD Sub or used for any purpose other than as contemplated herein. If the
transactions contemplated by this Agreement are not consummated, GDSC and GD Sub
shall hold such information in confidence for a period of four years from the
date of any termination of this Agreement, and all such information that is in
writing or embodied on a diskette, tape or other tangible medium shall be
promptly returned to TG3.

          10.01-2 No information concerning GDSC or GD Sub not previously
disclosed to the public or in the public domain that has been furnished to or
obtained by TG3 or Partners under this Agreement or in connection with the
transactions contemplated hereby shall be disclosed to any person other than in
confidence to the employees, legal counsel, financial advisers or independent
public accountants of TG3 or used for any purpose other than as contemplated
herein. If the transactions contemplated by this Agreement are not consummated,
TG3 and Partners shall hold such information in confidence for a period of four
years from the date of any termination of this Agreement, and all such
information that is in writing or embodied on a diskette, tape or other tangible
medium shall be promptly returned to GD Sub.

          10.01-3 Notwithstanding the foregoing, such obligations of GD Sub and
of TG3 shall not apply to information

               (a) that is, or becomes, publicly available from a source other
than GD Sub or TG3, as the case may be;

               (b) that was known and can be shown to have been known by GD Sub
at the time of its receipt from TG3, or by TG3 at the time of its receipt from
GD Sub, as the case may be;

                                       28
<PAGE>
               (c) that is received by GD Sub from a third party without breach
of this Agreement by GD Sub, or is received by TG3 from a third party without
breach of this Agreement by TG3, as the case may be;

               (d) that is required by law to be disclosed; or

               (e) that is disclosed in accordance with the written consent of
GD Sub or of TG3, as the case may be.

     10.02 Press Releases. No press releases or other public announcements
concerning the transactions contemplated by this Agreement shall be made by TG3
without the prior written consent of GD Sub; provided, however, that nothing
herein shall prevent a party from supplying such information or making
statements as required by governmental authority or in order for a party to
satisfy its legal obligations (prompt notice of which shall in any such case be
given to the other party or parties).

                                   ARTICLE XI

                                Other Provisions

     11.01 Benefit and Assignment. This Agreement shall be binding upon and
shall inure to the benefit of the parties hereto and their respective successors
and assigns. No party hereto may voluntarily or involuntarily assign such
party's interest under this Agreement without the prior written consent of the
other parties.

     11.02 Entire Agreement. This Agreement and the Schedules and Exhibits
referred to herein embody the entire agreement and understanding of the parties
and supersede any and all prior agreements, arrangements and understandings
relating to matters provided for herein.

     11.03 Fees and Expenses. GDSC and GD Sub shall be solely responsible for
all costs and expenses incurred by them, and TG3 shall be solely responsible for
all costs and expenses incurred by TG3, in connection with the negotiation,
preparation and performance of and compliance with the terms of this Agreement.

     11.04 Amendment, Waiver, etc. The provisions of this Agreement may be
amended or waived only by an instrument in writing signed by the party against
which enforcement of such amendment or waiver is sought. Any waiver of any term
or condition of this Agreement or any breach hereof shall not operate as a
waiver of any other such term, condition or breach, and no failure to enforce
any provision hereof shall operate as a waiver of such provision or of any other
provision hereof.

     11.05 Headings. The headings are for convenience only and will not control
or affect the meaning or construction of the provisions of this Agreement.

                                       29
<PAGE>
     11.06 Governing Law. The construction and performance of this Agreement
will be governed by the laws of the State of Washington (except for the choice
of law provisions thereof).

     11.07 Notices. Any notice, demand or request required or permitted to be
given under the provisions of this Agreement shall be in writing; shall be
delivered personally, including by means of telecopy, or mailed by registered or
certified mail, postage prepaid and return receipt requested; shall be deemed
given on the date of personal delivery or on the date set forth on the return
receipt; and shall be delivered or mailed to the addresses or telecopy numbers
set forth on the first page of this Agreement or to such other address as any
party may from time to time direct, with copies to:

           In the case of GDSC or GD Sub:

                Stoel Rives LLP
                900 SW Fifth Avenue, Suite 2300
                Portland, OR  97204
                Telecopy No.:  (503) 220-2480

                Attention:  Edward L. Epstein

                In the case of TG3 or Partners:

                Miller & Holguin
                1801 Century Park East, 7th Floor
                Los Angeles, CA  90067
                Telecopy No.:  (310) 557-2205

                Attention:  Henry Holguin

     11.08 Breach; Equitable Relief. The parties acknowledge that the Dental
Practice and rights of the parties described in this Agreement are unique and
that money damages alone for breach of this Agreement would be inadequate. Any
party aggrieved by a breach of the provisions hereof may bring an action at law
or suit in equity to obtain redress, including specific performance, injunctive
relief or any other available equitable remedy. Time and strict performance are
of the essence in this Agreement.

     11.09 Attorneys' Fees. If suit or action is filed by any party to enforce
the provisions of this Agreement or otherwise with respect to the subject matter
of this Agreement, the prevailing party shall be entitled to recover reasonable
attorneys' fees as fixed by the trial court and, if any appeal is taken from the
decision of the trial court, reasonable attorneys' fees as fixed by the
appellate court. For purposes of this Agreement, the term "prevailing party"
shall be deemed to include a party that successfully opposes a petition for
review filed with an appellate court.

     11.10 Guarantee. GDSC irrevocably and unconditionally guarantees that GD
Sub will perform each and every obligation of GD Sub under this Agreement and
waives and agrees not to assert or take advantage of any of the following to the
extent they might apply: (a) any right to require

                                       30
<PAGE>
TG3 or Partners to proceed against GD Sub, it being understood and agreed that
TG3 and Partners may proceed against GDSC without first proceeding against GD
Sub or any other person or entity; (b) TG3's or Partners' failure to file or
enforce any claim in any bankruptcy or insolvency proceedings against GD Sub;
(c) any presentment, demand, protest or notice of any kind to GDSC, including
without limitation, notice of the acceptance of this guarantee, or of any action
or nonaction on the part of GD Sub under this Agreement; or (d) any right to
prior notice and approval of any extension of the time for payment of any
amounts or performance of any obligations due under this Agreement or any other
modification, alteration or change of this Agreement.

     11.11 Counterparts. This Agreement may be executed in one or more
counterparts, each of which will be deemed an original but all of which together
will constitute one and the same instrument.

     IN WITNESS WHEREOF, the parties have executed this Agreement as of the day
and year first written above.


     GDSC:                             GENTLE DENTAL SERVICE CORPORATION


                                       By: L. T. VAN EERDEN
                                           -------------------------------------
                                       Title:  Executive Vice President


     GD SUB:                           GENTLE DENTAL MANAGEMENT, INC.


                                       By: L. T. VAN EERDEN
                                           -------------------------------------
                                       Title:  Executive Vice President


     TG3:                              TG3 DENTAL SERVICES


                                       By: STEPHEN THORNE
                                           -------------------------------------
                                       Title:  President of the Managing Partner


     PARTNERS:                         STEPHEN THORNE IV
                                       -----------------------------------------
                                       Stephen  E. Thorne IV


                                       CAROLYN G. GHAZAL
                                       -----------------------------------------
                                       Carolyn G. Ghazal, D.D.s.

                                       31

                            ASSET PURCHASE AGREEMENT

                                     between

                       GENTLE DENTAL SERVICE CORPORATION,

                         GENTLE DENTAL MANAGEMENT, INC.

                                       and

                          BRYAN WATANABE, D.D.S., INC.


                               Dated June 30, 1998
<PAGE>
                                TABLE OF CONTENTS

                                                                           Page
                                                                           ----

ARTICLE I - Purchase and Sale of Asset.............................          2

         1.01     Purchase and Sale................................          2
         1.02     Purchase Price...................................          2
         1.03     Instruments of Conveyance and Transfer...........          2
         1.04     Further Assurances...............................          2
         1.05     Closing  ........................................          3

ARTICLE II - Representations and Warranties of GD Sub and GDSC.....          3

         2.01     Authorization....................................          3
         2.02     Capitalization...................................          3
         2.03     Compliance.......................................          3
         2.04     Consents.........................................          4
         2.05     Accuracy of Representations & Warranties.........          4
         2.06     Rule 144.........................................          4

ARTICLE III - Representations and Warranties of Watanabe PC and
              Shareholder..........................................          4

         3.01     Corporate Existence; Authority...................          4
         3.02     No Adverse Consequences..........................          5
         3.03     Brokers and Finders..............................          5
         3.04     Investments Representations......................          5
         3.05     Access to Information............................          6
         3.06     Sophistication...................................          6
         3.07     Accuracy of Representations and Warranties.......          6

ARTICLE IV - Joint Covenants.......................................          6

         4.01     Best Efforts; No Inconsistent Action.............          6

ARTICLE V - Conditions to Obligations of GD Sub....................          7

         5.01     Representations, Warranties and Covenants........          7
         5.02     Adverse Proceedings..............................          7
         5.03     Management Agreement.............................          7
         5.04     Shares Acquisition Agreement.....................          7
         5.05     Dentist Employment Agreement.....................          7
         5.06     Closing of PDS Transaction.......................          7
         5.07     Actions Satisfactory to GD Sub's Counsel.........          7

                                       i
<PAGE>
ARTICLE VI - Conditions to Obligations of Watanabe PC..............          8

         6.01     Representations, Warranties and Covenants........          8
         6.02     Adverse Proceedings..............................          8
         6.03     Stock Price......................................          8

ARTICLE VII - Termination..........................................          8

         7.01     Right of Parties to Terminate....................          8
         7.02     Effect of Termination............................          9

ARTICLE VIII - Survival; Indemnification...........................          9

         8.01     Survival.........................................          9
         8.02     Indemnification by Watanabe PC and Shareholder...          9
         8.03     Indemnification by GD Sub........................         10
         8.04     Indemnification Procedure........................         10
         8.05     Right of Offset..................................         11
         8.06     Rights Not Exclusive.............................         12

ARTICLE IX - Confidentiality; Press Releases.......................         12

         9.1      Confidentiality..................................         12
         9.2      Press Releases...................................         13

ARTICLE X - Other Provisions.......................................         13

         10.01    Benefit and Assignment...........................         13
         10.02    Entire Agreement.................................         13
         10.03    Fees and Expenses................................         13
         10.04    Amendment, Waiver, etc...........................         13
         10.05    Headings.........................................         13
         10.06    Governing Law....................................         13
         10.07    Notices  ........................................         13
         10.08    Breach; Equitable Relief.........................         14
         10.09    Attorneys' Fees..................................         14
         10.10    Guarantee........................................         14
         10.11    Counterparts.....................................         15

                                       ii
<PAGE>
                             INDEX OF DEFINED TERMS

Term                                                     Location of Definition
- ----                                                     ----------------------

1933 Act.............................................    2.06
Asset................................................    1.01
Cash Consideration...................................    1.02-1
Closing..............................................    1.05
Closing Date.........................................    1.05
Damages..............................................    8.02-1
Dental Practice......................................    Introduction
Earnout Consideration................................    1.02-4
GD Sub...............................................    Introduction
GD Sub's Indemnified Persons.........................    8.02-1
GDSC.................................................    Introduction
GDSC Common Stock....................................    1.02-2
PDS..................................................    Introduction
PDS Management Agreement.............................    Introduction
Purchase Price.......................................    1.02
Registration Statement...............................    2.02
Related Documents....................................    8.01
Shares...............................................    2.06
Shareholder..........................................    Introduction
Stock Consideration Amount...........................    1.02-2
Stock Price..........................................    1.02-2
Third Party Claims...................................    8.04-1(a)
Watanabe PC..........................................    Introduction
Watanabe PC's Indemnified Persons....................    8.03-1


                                LIST OF EXHIBITS

Exhibit                          Item                            First Reference
- -------                          ----                            ---------------

   A                      Assignment and Bill of Sale                1.03
   B                      Management Agreement                       5.03
   C                      Shares Acquisition Agreement               5.04
   D                      Dentist Employment Agreement               5.05

                                       iii
<PAGE>
                            ASSET PURCHASE AGREEMENT


DATED:            June 30, 1998


BETWEEN:          GENTLE DENTAL SERVICE CORPORATION,
                    a Washington corporation
                  900 Washington Street, Suite 1100
                  Vancouver, WA  98660
                  Telecopy No.:  (360) 750-8667                           "GDSC"


                  GENTLE DENTAL MANAGEMENT, INC.
                    a Delaware corporation
                  900 Washington Street, Suite 1100
                  Vancouver, WA 98660
                  Telecopy No.:  (360) 750-8667                         "GD Sub"


AND:              BRYAN WATANABE, D.D.S., INC.
                  10286 Indiana Ave.
                  Riverside, CA 92503
                  Telecopy No.: (714) 646-1659                     "Watanabe PC"


AND:              Bryan Watanabe                                   "Shareholder"


     Shareholder is the owner of all of the issued and outstanding capital stock
of Watanabe PC. Watanabe PC operates a dental practice at the addresses listed
above (the "Dental Practice"). Watanabe PC is party to a management services
agreement (the "PDS Management Agreement") with Pacific Dental Services, Inc.
("PDS"), and Watanabe PC and Shareholder are parties to a merger option
agreement with PDS (the "Merger Option Agreement"). GDSC, GD Sub and PDS are
consurrently signing an agreement (the "PDS Asset Agreement") pursuant to which
PDS will sell certain assets to GD Sub, including all assets of PDS associated
with the Dental Practice which assets include PDS's rights under the PDS
Management Agreement and the Merger Option Agreement. Watanabe PC desires to
sell, and GD Sub desires to purchase, the rights of Watanabe PC under the PDS
Management Agreement on the terms and conditions set forth in this Agreement,
and to replace the PDS Management Agreement with a new management agreement
between GD Sub and Watanabe PC (the "GD Management Agreement").

     In consideration of the mutual promises and covenants contained in this
Agreement, the parties agree as follows:

<PAGE>
                                    ARTICLE I

                           Purchase and Sale of Asset

     1.01 Purchase and Sale. Subject to all the terms and conditions of this
Agreement and for the consideration herein stated, on the "Closing Date," as
that term is defined in Section 1.05, Watanabe PC agrees to sell, convey,
assign, transfer and deliver to GD Sub, and GD Sub agrees to purchase and accept
from PDS, the rights of Watanabe PC under the PDS Management Agreement (the
"Asset"). Effective as of the Closing Date, the PDS Management Agreement and the
Merger Option Agreement shall be terminated and shall have no further force or
effect.

     1.02 Purchase Price. The purchase price for the Asset (the "Purchase
Price") shall be the following:

          1.02-1 $240,000, payable by check on the Closing Date (the "Cash
Consideration").

          1.02-2 A number of shares of GDSC's Common Stock ("GDSC Common Stock")
determined by dividing $65,000 (the "Stock Consideration Amount") by a number
(the "Stock Price") equal to the average of the closing prices of GDSC Common
Stock reported by NASDAQ for the five trading days prior to the date of this
Agreement. The shares of GDSC Common Stock to be delivered under this Agreement
shall be issued by GDSC to GD Sub for transfer by GD Sub to Watanabe PC.

          1.02-3 An amount equal to 25% of the excess of (a) the sum of the Cash
Consideration and the Stock Consideration Amount over (b) $250,000, payable by
check on the Closing Date.

          1.02-4 An additional payment (the "Earnout Consideration") equal to
1.25 times the excess of (a) 2.746 times the average monthly revenue of the
Dental Practice for the 6 month period ending February 28, 2000 over (b) the sum
of the Cash Consideration and the Stock Consideration Amount. The Earnout
Consideration shall be paid by check. The calculation and payment of the Earnout
Consideration shall be completed by May 31, 2000.

     1.03 Instruments of Conveyance and Transfer. The sale of the Asset, and the
conveyance, assignment, transfer and delivery of all of the Asset shall be
effected by Watanabe PC's execution and delivery to GD Sub, on the Closing Date,
of a bill of sale in substantially the form of the Assignment and Bill of Sale
attached hereto as Exhibit A.

     1.04 Further Assurances. Watanabe PC and Shareholder agree that, at any
time and from time to time on and after the Closing Date, they will, upon the
request of GD Sub and without further consideration, take all steps reasonably
necessary to place GD Sub in possession and operating control of the Asset and
will do, execute, acknowledge and deliver, or will cause to be done, executed,
acknowledged and delivered, all further acts, deeds, assignments, conveyances,
transfers, powers of attorney or assurances as reasonably required to sell,
assign, convey, transfer, grant, assure and confirm to GD Sub, or to aid and
assist in the collection of or reducing to possession by GD Sub of, the Asset,
or to vest in GD Sub good, valid and marketable title to the Asset.

                                       2
<PAGE>
     1.05 Closing. The consummation of the transactions contemplated by this
Agreement (the "Closing") shall take place at the offices of Stoel Rives LLP,
900 SW Fifth Avenue, Suite 2300, Portland, Oregon, at 10:00 a.m., Pacific time,
on June 30, 1998 or at another date, time and place agreed upon in writing by
the parties (the "Closing Date").

                                   ARTICLE II

                Representations and Warranties of GD Sub and GDSC

     GD Sub and GDSC, jointly and severally, represent and warrant to Watanabe
PC as follows:

     2.01 Authorization. Each of GD Sub and GDSC is a corporation duly
organized, validly existing and in good standing under the laws of the state of
its incorporation, with all requisite corporate power and authority to own and
operate its properties and to carry on its business as now conducted. Each of GD
Sub and GDSC has taken all corporate action necessary to authorize its
execution, delivery and performance of this Agreement. Each of GD Sub and GDSC
has full corporate power and authority to enter into this Agreement and carry
out the terms hereof. This Agreement has been duly executed and delivered by GD
Sub and GDSC and is binding upon and enforceable against each of them in
accordance with its terms, except as enforceability may be limited or affected
by applicable bankruptcy, insolvency, reorganization, or other laws of general
application relating to or affecting creditors' rights generally and except as
enforceability may be limited by rules of law governing specific performance,
injunctive relief or other equitable remedies.

     2.02 Capitalization. The authorized capital stock of GDSC consists of
50,000,000 shares of Common Stock, of which 7,994,213 shares are issued and
outstanding, and 30,000,000 shares of Preferred Stock, of which 1,628,863 shares
are issued and outstanding. All issued and outstanding shares of GDSC capital
stock are validly issued, fully paid and nonassessable, and have been issued
without violation of any preemptive rights. There is no subscription, option,
warrant, call, right, agreement or commitment (including any right of conversion
or exchange under any outstanding security or other instrument) relating to the
issuance by GDSC of GDSC capital stock other than outstanding options under the
GDSC 1993 Stock Incentive Plan, outstanding purchase rights under the GDSC
Employee Stock Purchase Plan and the GDSC Professional Corporation Employee
Stock Purchase Plan, other options and warrants described in GDSC's Registration
Statement on Form SB-2, Registration No. 333-44037 (the "Registration
Statement"), the issuance of convertible debt and preferred stock announced by
GDSC on May 12, 1998, and outstanding offers and/or agreements to acquire other
dental practices or dental practice management companies in exchange for Common
Stock. The GDSC Common Stock to be issued under this Agreement will, when
issued, be duly and validly authorized and issued, fully paid and nonassessable.

     2.03 Compliance. The execution, delivery and performance of this Agreement
by GD Sub and GDSC, the compliance by GD Sub and GDSC with the provisions of
this Agreement and the consummation of the transactions described in this
Agreement will not conflict with or result in the breach of any of the terms or
provisions of or constitute a default under:

          2.03-1 the respective articles of incorporation or bylaws of GD Sub
and GDSC;

                                       3
<PAGE>
          2.03-2 any note, indenture, mortgage, deed of trust, loan agreement,
lease or other agreement or instrument to which GD Sub or GDSC is a party or by
which GD Sub or GDSC is bound; or

          2.03-3 any statute or any order, rule, regulation or decision of any
court or regulatory authority or governmental body applicable to GD Sub or GDSC.

     2.04 Consents. No consent, approval, authorization, order, designation or
declaration of any court or regulatory authority or governmental body, federal
or other, or third person is required to be obtained by GD Sub or GDSC for the
consummation of the transactions described in this Agreement.

     2.05 Accuracy of Representations & Warranties. None of the representations
or warranties of GD Sub or GDSC contains or will contain any untrue statement of
any material fact or omits or misstates a material fact necessary to make the
statements contained in this Agreement not misleading. Neither GD Sub nor GDSC
knows of any fact that has resulted or that, in the reasonable judgement of GD
Sub or GDSC will result, in any material adverse change in the business, results
of operation, financial condition or prospects of GD Sub or GDSC that has not
been set forth in this Agreement or in GDSC's filings with the Securities and
Exchange Commission.

     2.06 Rule 144. With a view to making available to Watanabe PC the benefits
of Rule 144 promulgated under the Securities Act of 1933 (the "1933 Act"), GDSC
agrees, during the one-year period starting on the first anniversary of the
Closing Date or such longer period as the public resale of the shares of GDSC
Common Stock issued under this Agreement ("Shares") by a nonaffiliate of GDSC is
subject to Rule 144, to file with the Securities and Exchange Commission in a
timely manner all reports and other documents required of GDSC under the
Securities Exchange Act of 1934. GDSC agrees to remove the legend described in
the last sentence of Section 3.04 from the certificates representing the Shares,
upon request of the holder, at any time after the second anniversary of the
Closing Date or such other time as the Shares may be freely sold by the holder
without restriction under Rule 144.

                                   ARTICLE III

          Representations and Warranties of Watanabe PC and Shareholder

     Watanabe PC and Shareholder represent and warrant to GD Sub as follows:

     3.01 Corporate Existence; Authority. Watanabe PC is a corporation duly
organized, validly existing and in good standing under the laws of the State of
California, and Watanabe PC has all necessary corporate power and authority to
own, lease and operate its properties and assets and to carry on its business as
now conducted and as proposed to be conducted. Shareholder owns all of the
issued and outstanding stock of Watanabe PC. Watanabe PC has full power and
authority to enter into this Agreement and to carry out its terms. Upon
execution of this Agreement by all Shareholder,Watanabe PC will have taken all
corporate action necessary to authorize the execution, delivery and performance
of this Agreement. This Agreement has been duly and validly executed and
delivered by Watanabe PC and Shareholder and is binding upon and enforceable
against

                                       4
<PAGE>
Watanabe PC and Shareholder in accordance with its terms, except as
enforceability may be limited or affected by applicable bankruptcy, insolvency,
reorganization or other laws of general application relating to or affecting the
rights of creditors and except as enforceability may be limited by rules of law
governing specific performance, injunctive relief or other equitable remedies.

     3.02 No Adverse Consequences. Neither the execution and delivery of this
Agreement by Watanabe PC or Shareholder nor the consummation of the transactions
contemplated by this Agreement will

          3.02-1 result in the creation or imposition of any lien, charge or
encumbrance on any of Watanabe PC's assets or properties,

          3.02-2 violate or conflict with any provision of Watanabe PC's
articles of incorporation or bylaws,

          3.02-3 violate any law, judgment, order, injunction, decree, rule,
regulation or ruling of any governmental authority applicable to Watanabe PC,
Shareholder, or either of them, assuming that the agreements to be entered into
between GD Sub and Watanabe PC do not violate applicable laws, or

          3.02-4 either alone or with the giving of notice or the passage of
time or both, conflict with, constitute grounds for termination or acceleration
of, result in the breach of the terms, conditions or provisions of, result in
the loss of any benefit to Watanabe PC under or constitute a default under any
agreement, instrument, license or permit to which Watanabe PC or Shareholder is
a party or by which either of them is bound, assuming that the agreements to be
entered into between GD Sub and Watanabe PC do not violate applicable laws.

     3.03 Brokers and Finders. Neither Watanabe PC nor Shareholder has employed
any broker, finder or agent or dealt with anyone purporting to act in such
capacity or agreed to pay any brokerage fee, finder's fee or commission with
respect to the transaction contemplated by this Agreement.

     3.04 Investment Representations. Watanabe PC is acquiring the Shares and
Shareholder is acquiring beneficial ownership of the Shares for investment for
its or his own account, and not with a view to, or for resale in connection
with, any distribution of the Shares, other than a possible distribution of the
Shares from Watanabe PC to Shareholder. Neither Watanabe PC nor Shareholder is a
party to any contract, undertaking, agreement or arrangement with any person to
sell, transfer or grant participation to any such person or any third party with
respect to the Shares. Watanabe PC and Shareholder acknowledge and understand
that the Shares are being offered and sold without registration under the 1933
Act or any state securities law based on exemptions provided under such laws,
and that the representations contained in this Agreement are being relied upon
by GD Sub and GDSC in connection with those exemptions. Watanabe PC and
Shareholder further acknowledge and agree that the Shares are "restricted
securities" under federal securities laws and as such may not be sold or
disposed of unless they are registered under the 1933 Act and all applicable
state securities laws or unless, in the opinion of counsel acceptable to GD Sub
and GDSC, exemptions from the registration requirements of the 1933 Act and all
applicable state securities laws are available. In this regard,Watanabe PC and
Shareholder acknowledge that GDSC is under no obligation to register

                                       5
<PAGE>
the Shares, that the Shares will not be eligible for resale in the public market
pursuant to Rule 144 under the 1933 Act until one year after the Closing Date,
and that Watanabe PC and Shareholder will bear the economic risk of ownership of
the Shares at least until that time. Watanabe PC and Shareholder consent to
having appropriate legends placed on the certificates representing the Shares
relating to this restriction on transfer.

     3.05 Access to Information. Shareholder has received and carefully reviewed
GDSC's Annual Report on Form 10-KSB for the year ended December 31, 1997, GDSC's
Quarterly Report on Form 10-QSB for the quarter ended March 31, 1998, and the
Registration Statement. Shareholder believes he has received all of the
information he considers necessary or appropriate for deciding whether to
acquire shares of GDSC Common Stock. Shareholder further represents that he has
had an opportunity to ask questions and receive answers from GDSC regarding
GDSC, its business and financial condition, and the terms and conditions of the
Agreement.

     3.06 Sophistication. Shareholder, together with his purchaser
representative, if any, has such knowledge and experience in financial and
business matters that he is capable of evaluating the merits and risks of an
investment in the Shares and has the capacity to protect his own interests in
connection with the transaction.

     3.07 Accuracy of Representations and Warranties. None of the
representations or warranties of Watanabe PC and Shareholder contains or will
contain any untrue statement of any material fact or omits or misstates a
material fact necessary to make the statements contained in this Agreement not
misleading. Watanabe PC and Shareholder do not know of any fact that has
resulted or that, in the reasonable judgment of Watanabe PC or Shareholder will
result, in any material adverse change in Watanabe PC's business, results of
operation, financial condition or prospects that has not been set forth in this
Agreement.

                                   ARTICLE IV

                                 Joint Covenants

     GD Sub,Watanabe PC and Shareholder covenant and agree that they will act in
accordance with the following:

     4.01 Best Efforts; No Inconsistent Action. Each party will use its best
efforts to effect the transactions contemplated by this Agreement and to fulfill
the conditions to the obligations of the other parties set forth in Article 5 or
6 of this Agreement. No party will take any action inconsistent with its
obligations under this Agreement or that could hinder or delay the consummation
of the transactions contemplated by this Agreement, except that nothing in this
Section 4.01 shall limit the rights of the parties under Articles 5, 6 and 7.

                                        6
<PAGE>
                                    ARTICLE V

                       Conditions to Obligations of GD Sub

     The obligations of GD Sub under Article 1 are, at its option, subject to
satisfaction, at or prior to the Closing, of each of the following conditions:

     5.01 Representations, Warranties and Covenants.

          5.01-1 All representations and warranties of Watanabe PC and
Shareholder made in this Agreement, or in any certificate delivered pursuant
hereto, shall in all material respects be true and complete on and as of the
Closing Date with the same force and effect as if made on and as of that date.

          5.01-2 All of the terms, covenants and conditions to be complied with
and performed by Watanabe PC and Shareholder at or prior to the Closing shall in
all material respects have been complied with or performed thereby.

     5.02 Adverse Proceedings. No suit, action, claim or governmental proceeding
shall have been instituted or threatened against, and no order, decree or
judgment of any court, agency or other governmental authority shall have been
rendered against, GDSC, GD Sub,Watanabe PC or Shareholder to restrain or
prohibit, or obtain damages in respect of, this Agreement or the transactions
contemplated by this Agreement.

     5.03 Management Agreement. The PDS Management Agreement shall have been
amended and restated as a Management Agreement with GD Sub in the form attached
hereto as Exhibit B, and Watanabe PC shall have executed and delivered such
Management Agreement.

     5.04 Shares Acquisition Agreement. Watanabe PC and Shareholder shall have
executed and delivered a Shares Acquisition Agreement in the form attached
hereto as Exhibit C.

     5.05 Dentist Employment Agreement. Shareholder shall have executed and
delivered a Dentist Employment Agreement with Watanabe PC shall have executed
and delivered in the form attached hereto as Exhibit D.

     5.06 Closing of PDS Transaction. The transactions contemplated by the PDS
Asset Agreement shall close simultaneously with the Closing.

     5.07 Actions Satisfactory to GD Sub's Counsel. All actions, proceedings,
instruments and documents required to be carried out by this Agreement, or
incidental hereto, and all other relevant legal matters shall be reasonably
satisfactory to counsel for GD Sub.


                                        7
<PAGE>
                                   ARTICLE VI

                    Conditions to Obligations of Watanabe PC

     The obligations of Watanabe PC under Article I are, at its option, subject
to satisfaction, at or prior to the Closing, of each of the following
conditions:

     6.01 Representations, Warranties and Covenants.

          6.01-1 All representations and warranties of GDSC and GD Sub made in
this Agreement and in any certificate delivered pursuant hereto shall in all
material respects be true and complete on and as of the Closing Date with the
same force and effect as if made on and as of that date.

          6.01-2 All of the terms, covenants and conditions to be complied with
and performed by GDSC and GD Sub on or prior to the Closing shall in all
material respects have been complied with or performed by GDSC and GD Sub.

     6.02 Adverse Proceedings. No suit, action, claim or governmental proceeding
shall have been instituted or threatened against, and no order, decree or
judgment of any court, agency or other governmental authority shall have been
rendered against, GDSC, GD Sub, PDS or any Shareholder to restrain or prohibit
this Agreement or the transactions contemplated by this Agreement.

     6.03 Stock Price. The Stock Price shall not be less than $4.00 per share of
GDSC Common Stock.


                                   ARTICLE VII

                                   Termination

     7.01 Right of Parties to Terminate. This Agreement may be terminated:

          7.01-1 by GD Sub, if Watanabe PC or Shareholder or any of them shall
have breached any of their obligations hereunder in any material respect;

          7.01-2 by Watanabe PC, if GD Sub shall have breached any of its
obligations hereunder in any material respect or if the Stock Price falls below
$4.00; or

          7.01-3 by either Watanabe PC or GD Sub, by written notice to the other
party, if the Closing shall not have occurred on or prior to March 31, 1999;
provided, however, that the right to terminate this Agreement under this Section
7.01-3 shall not be available to any party whose failure to fulfill or perform
any obligation under this Agreement has been the cause of, or resulted in, the
failure of the Closing to occur on or before such date.

                                        8
<PAGE>
     7.02 Effect of Termination. If either GD Sub or Watanabe PC decides to
terminate this Agreement pursuant to Section 7.01, such party shall promptly
give written notice to the other party to this Agreement of such decision. In
the event of a termination pursuant to Section 7.01, the parties hereto shall be
released from all liabilities and obligations arising under this Agreement
(other than those described in Article 9 hereof) with respect to the matters
contemplated by this Agreement, other than for damages arising from a breach of
this Agreement.

                                  ARTICLE VIII

                            Survival; Indemnification

     8.01 Survival. All representations, warranties, covenants and agreements
made in this Agreement or in any schedule, certificate or assignment delivered
in accordance with this Agreement (collectively, the "Related Documents") shall
survive any investigation by or on behalf of any party, the execution and
delivery of this Agreement, the consummation of the transactions contemplated
hereby and any termination or expiration of this Agreement for a period of three
and one-half years following the Closing Date and after such period shall be
terminated and extinguished, except insofar as the damaged party shall have
asserted in writing a claim setting forth with reasonable specificity facts and
circumstances relating thereto prior to the expiration of such period in which
event the party liable shall remain liable with respect to such claim.

     8.02 Indemnification by Watanabe PC and Shareholder.

          8.02-1 Notwithstanding any investigation by GDSC or GD Sub, from and
after the Closing, Watanabe PC and Shareholder shall indemnify, hold harmless
and, to the extent provided in Section 8.04-1, defend GDSC, GD Sub, and their
respective subsidiaries, shareholders, affiliates, officers, directors,
employees, agents, successors and assigns (collectively, "GD Sub's Indemnified
Persons") from and against, and reimburse each of GD Sub's Indemnified Persons
with respect to, any and all losses, damages, liabilities, costs and expenses,
including interest from the date of such loss to the time of payment, penalties
and reasonable attorneys' fees (collectively, "Damages") incurred by any of GD
Sub's Indemnified Persons by reason of or arising out of or in connection with:

               (a) any material breach or inaccuracy of any representation or
warranty of Watanabe PC or Shareholder, or any of them, made in this Agreement
or any Related Document; or

               (b) any failure by Watanabe PC or Shareholder, or any of them, to
perform any covenant required to be performed by them pursuant to this Agreement
or any Related Document after reasonable opportunity to cure.

          8.02-2 This indemnification extends to any Damages suffered by any of
GD Sub's Indemnified Persons, whether or not a claim is made against any of GD
Sub's Indemnified Persons by any third party.

                                       9
<PAGE>
     8.03 Indemnification by GD Sub.

          8.03-1 Notwithstanding any investigation by Watanabe PC or
Shareholder, from and after the Closing, GDSC and GD Sub shall indemnify, hold
harmless and, to the extent provided in Section 8.04-1, defend Watanabe PC,
Shareholder, and their respective partners, affiliates, officers, employees,
agents, successors and assigns (collectively, "Watanabe PC's Indemnified
Persons") from and against, and reimburse each of Watanabe PC's Indemnified
Persons with respect to, any and all Damages incurred by any of Watanabe PC's
Indemnified Persons by reason of or arising out of or in connection with:

               (a) any material breach or inaccuracy of any representation or
warranty of GDSC or GD Sub made in this Agreement or any Related Document; or

               (b) any failure by GDSC or GD Sub to perform any covenant
required to be performed by them pursuant to this Agreement or any Related
Document after reasonable opportunity to cure.

          8.03-2 This indemnification extends to any Damages suffered by any of
Watanabe PC's Indemnified Persons whether or not a claim is made against any of
Watanabe PC's Indemnified Persons by any third party.

     8.04 Indemnification Procedure.

          8.04-1 Third Party Claims.

               (a) Each indemnified party shall, with reasonable promptness
after obtaining knowledge thereof, provide any indemnifying party against whom a
claim for indemnification is to be made under this Article 8 with written notice
of all third party actions, suits, proceedings, claims, demands or assessments
that may be subject to the indemnification provisions of this Article 8
(collectively, "Third Party Claims"), including, in reasonable detail, the basis
for the claim, the nature of Damages and a good faith estimate of the amount of
Damages.

               (b) Each indemnifying party shall have 15 days after its receipt
of the claim notice to notify the indemnified party in writing whether the
indemnifying party agrees that the claim is subject to this Article 8 and, if
so, whether the indemnifying party elects, jointly with any other indemnifying
party notified under Section 8.04-1(a), to undertake, conduct and control,
through counsel of its or their choosing (subject to the consent of the
indemnified party, such consent not to be withheld unreasonably) and at its or
their sole risk and expense, the good faith settlement or defense of the Third
Party Claim.

               (c) If within 15 days after its receipt of the claim notice an
indemnifying party notifies the indemnified party that it elects to undertake
the good faith settlement or defense of the Third Party Claim, the indemnified
party shall cooperate reasonably with the indemnifying party in connection
therewith including, without limitation, by making available to the indemnifying
party all relevant information material to the defense of the Third Party Claim.
The indemnified party shall be entitled to participate in the settlement or
defense of the Third Party Claim through counsel chosen by the indemnified
party, at its expense, and to approve any proposed settlement that

                                       10
<PAGE>
would impose any obligation or duty on the indemnified party, which approval
may, in the sole discretion of the indemnified party, be withheld. So long as an
indemnifying party is contesting the Third Party Claim in good faith and with
reasonable diligence, the indemnified party shall not pay or settle the Third
Party Claim. Notwithstanding the foregoing, the indemnified party shall have the
right to pay or settle any Third Party Claim at any time, provided that in such
event it waives any right to indemnification therefor by the indemnifying party.

               (d) If an indemnifying party does not provide notice that it
elects to undertake the good faith settlement or defense of the Third Party
Claim, or if an indemnifying party fails to contest the Third Party Claim or
undertake or approve settlement, in good faith and with reasonable diligence,
the indemnified party shall thereafter have the right to contest, settle or
compromise the Third Party Claim at its exclusive discretion, at the risk and
expense of the indemnifying party, and the indemnifying party will thereby waive
any claim, defense or argument that the indemnified party's settlement or
defense of such Third Party Claim is in any respect inadequate or unreasonable.

               (e) A party's failure to give timely notice will not constitute a
defense, in part or in whole, to any claim for indemnification by such party,
except if, and only to the extent that, such failure results in any material
prejudice to the indemnifying party.

          8.04-2 Non-Third Party Claims.

               (a) Each indemnified party shall, with reasonable promptness,
deliver to any indemnifying party against whom a claim for indemnification is to
be made under this Article 8 written notice of all claims for indemnification
under this Article 8, other than Third Party Claims, including, in reasonable
detail, the basis for the claim, the nature of Damages and a good faith estimate
of the amount of Damages.

               (b) Each indemnifying party shall have 30 days after its receipt
of the claim notice to notify the indemnified party in writing whether or not
the indemnifying party accepts liability for all or any part of the Damages
described in the claim notice. If the indemnifying party does not so notify the
indemnified party, the indemnifying party shall be deemed to accept liability
for all the Damages described in the claim notice.

               (c) A party's failure to give timely notice will not constitute a
defense, in part or in whole, to any claim for indemnification by such party,
except if, and only to the extent that, such failure results in any material
prejudice to the indemnifying party.

     8.05 Right of Offset. At the election of GD Sub, any liability of Watanabe
PC or any Shareholder under Section 8.02 which has been established by
agreement, litigation or in accordance with the procedure set forth in Section
8.04 may be satisfied by offsetting such liability against any Earnout
Consideration then due or that subsequently becomes due. For this purpose, a
liability shall not be deemed to have been established in accordance with the
procedure set forth in Section 8.04 if Watanabe PC or the Shareholder has
asserted under Section 8.04-1(b) that the liability is not subject to this
Article 8 and the question has not been resolved by agreement or litigation.

                                       11
<PAGE>
     8.06 Rights Not Exclusive. An indemnified party's rights to indemnification
under this Article 8 are in addition to, and not in lieu of, any other rights to
which the indemnified party may be entitled at law or in equity.

                                   ARTICLE IX

                         Confidentiality; Press Releases

     9.01 Confidentiality.

          9.01-1 No information concerning Watanabe PC not previously disclosed
to the public or in the public domain that has been furnished to or obtained by
GDSC or GD Sub under this Agreement or in connection with the transactions
contemplated hereby shall be disclosed to any person other than in confidence to
employees, legal counsel, financial advisers or independent public accountants
of GDSC or GD Sub or used for any purpose other than as contemplated herein. If
the transactions contemplated by this Agreement are not consummated, GDSC and GD
Sub shall hold such information in confidence for a period of four years from
the date of any termination of this Agreement, and all such information that is
in writing or embodied on a diskette, tape or other tangible medium shall be
promptly returned to Watanabe PC.

          9.01-2 No information concerning GDSC or GD Sub not previously
disclosed to the public or in the public domain that has been furnished to or
obtained by Watanabe PC or Shareholder under this Agreement or in connection
with the transactions contemplated hereby shall be disclosed to any person other
than in confidence to the employees, legal counsel, financial advisers or
independent public accountants of Watanabe PC or used for any purpose other than
as contemplated herein. If the transactions contemplated by this Agreement are
not consummated, Watanabe PC and Shareholder shall hold such information in
confidence for a period of four years from the date of any termination of this
Agreement, and all such information that is in writing or embodied on a
diskette, tape or other tangible medium shall be promptly returned to GD Sub.

          9.01-3 Notwithstanding the foregoing, such obligations of GD Sub and
of Watanabe PC shall not apply to information

               (a) that is, or becomes, publicly available from a source other
than GD Sub or Watanabe PC, as the case may be;

               (b) that was known and can be shown to have been known by GD Sub
at the time of its receipt from Watanabe PC, or by Watanabe PC at the time of
its receipt from GD Sub, as the case may be;

               (c) that is received by GD Sub from a third party without breach
of this Agreement by GD Sub, or is received by Watanabe PC from a third party
without breach of this Agreement by Watanabe PC, as the case may be;

               (d) that is required by law to be disclosed; or

                                       12
<PAGE>
               (e) that is disclosed in accordance with the written consent of
GD Sub or of Watanabe PC, as the case may be.

     9.02 Press Releases. No press releases or other public announcements
concerning the transactions contemplated by this Agreement shall be made by
Watanabe PC without the prior written consent of GD Sub; provided, however, that
nothing herein shall prevent a party from supplying such information or making
statements as required by governmental authority or in order for a party to
satisfy its legal obligations (prompt notice of which shall in any such case be
given to the other party or parties).

                                    ARTICLE X

                                Other Provisions

     10.01 Benefit and Assignment. This Agreement shall be binding upon and
shall inure to the benefit of the parties hereto and their respective successors
and assigns. No party hereto may voluntarily or involuntarily assign such
party's interest under this Agreement without the prior written consent of the
other parties.

     10.02 Entire Agreement. This Agreement and the Schedules and Exhibits
referred to herein embody the entire agreement and understanding of the parties
and supersede any and all prior agreements, arrangements and understandings
relating to matters provided for herein.

     10.03 Fees and Expenses. GDSC and GD Sub shall be solely responsible for
all costs and expenses incurred by them, and Watanabe PC shall be solely
responsible for all costs and expenses incurred by Watanabe PC, in connection
with the negotiation, preparation and performance of and compliance with the
terms of this Agreement.

     10.04 Amendment, Waiver, etc. The provisions of this Agreement may be
amended or waived only by an instrument in writing signed by the party against
which enforcement of such amendment or waiver is sought. Any waiver of any term
or condition of this Agreement or any breach hereof shall not operate as a
waiver of any other such term, condition or breach, and no failure to enforce
any provision hereof shall operate as a waiver of such provision or of any other
provision hereof.

     10.05 Headings. The headings are for convenience only and will not control
or affect the meaning or construction of the provisions of this Agreement.

     10.06 Governing Law. The construction and performance of this Agreement
will be governed by the laws of the State of Washington (except for the choice
of law provisions thereof).

     10.07 Notices. Any notice, demand or request required or permitted to be
given under the provisions of this Agreement shall be in writing; shall be
delivered personally, including by means of telecopy, or mailed by registered or
certified mail, postage prepaid and return receipt requested; shall be deemed
given on the date of personal delivery or on the date set forth on the return
receipt; and shall be delivered or mailed to the addresses or telecopy numbers
set forth on the first page of this Agreement or to such other address as any
party may from time to time direct, with copies to:

                                       13
<PAGE>
           In the case of GDSC or GD Sub:

                Stoel Rives LLP
                900 SW Fifth Avenue, Suite 2300
                Portland, OR  97204
                Telecopy No.:  (503) 220-2480

                Attention:  Edward L. Epstein

           In the case of Watanabe PC or Shareholder:

                Miller & Holguin
                1801 Century Park East, 7th Floor
                Los Angeles, CA 90067
                Telecopy No.:  (310) 557-2205

                Attention:   Henry Holquin

     10.08 Breach; Equitable Relief. The parties acknowledge that the Dental
Practices and rights of the parties described in this Agreement are unique and
that money damages alone for breach of this Agreement would be inadequate. Any
party aggrieved by a breach of the provisions hereof may bring an action at law
or suit in equity to obtain redress, including specific performance, injunctive
relief or any other available equitable remedy. Time and strict performance are
of the essence in this Agreement.

     10.09 Attorneys' Fees. If suit or action is filed by any party to enforce
the provisions of this Agreement or otherwise with respect to the subject matter
of this Agreement, the prevailing party shall be entitled to recover reasonable
attorneys' fees as fixed by the trial court and, if any appeal is taken from the
decision of the trial court, reasonable attorneys' fees as fixed by the
appellate court. For purposes of this Agreement, the term "prevailing party"
shall be deemed to include a party that successfully opposes a petition for
review filed with an appellate court.

     10.10 Guarantee. GDSC irrevocably and unconditionally guarantees that GD
Sub will perform each and every obligation of GD Sub under this Agreement and
waives and agrees not to assert or take advantage of any of the following to the
extent they might apply: (a) any right to require Watanabe PC or Shareholder to
proceed against GD Sub, it being understood and agreed that Watanabe PC and
Shareholder may proceed against GDSC without first proceeding against GD Sub or
any other person or entity; (b) Watanabe PC's or Shareholder's failure to file
or enforce any claim in any bankruptcy or insolvency proceedings against GD Sub;
(c) any presentment, demand, protest or notice of any kind to GDSC, including
without limitation, notice of the acceptance of this guarantee, or of any action
or nonaction on the part of GD Sub under this Agreement; or (d) any right to
prior notice and approval of any extension of the time for payment of any
amounts or performance of any obligations due under this Agreement or any other
modification, alteration or change of this Agreement.

                                       14
<PAGE>
     10.11 Counterparts. This Agreement may be executed in one or more
counterparts, each of which will be deemed an original but all of which together
will constitute one and the same instrument.

     IN WITNESS WHEREOF, the parties have executed this Agreement as of the day
and year first written above.


     GDSC:                             GENTLE DENTAL SERVICE CORPORATION


                                       By: L.T. VAN EERDEN
                                           -------------------------------------
                                       Title:  Executive Vice President


     GD SUB:                           GENTLE DENTAL MANAGEMENT, INC.


                                       By: L.T. VAN EERDEN
                                           -------------------------------------
                                       Title:  Executive Vice President


     Watanabe PC:                      BRYAN WATANABE, D.D.S., INC.


                                       By: BRYAN WATANABE, D.D.S.
                                           -------------------------------------
                                       Title: Pres.
                                              ----------------------------------


     Shareholder:                      BRYAN WATANABE, D.D.S.
                                       -----------------------------------------
                                       Bryan Watanabe, D.D.S.

                                       15


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