EZ EM INC
8-K/A, 1996-05-10
IN VITRO & IN VIVO DIAGNOSTIC SUBSTANCES
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                       SECURITIES AND EXCHANGE COMMISSION

                             WASHINGTON, D.C. 20549

                             -----------------------

                                   FORM 8-K/A

                                 CURRENT REPORT

                     PURSUANT TO SECTION 13 OR 15(D) OF THE
                         SECURITIES EXCHANGE ACT OF 1934

Date of Report (Date of earliest event reported): NOVEMBER 22, 1995
                                                  ------------------
                                  E-Z-EM, INC.
- --------------------------------------------------------------------------------
               (Exact Name of Registrant as Specified in Charter)

       NEW YORK                     1-11479             11-1999504
- --------------------------------------------------------------------------------
(State or Other Jurisdiction     (Commission         (IRS Employer
     of Incorporation)           File Number)      Identification No.)

                 717 MAIN STREET, WESTBURY, NEW YORK            11590
- --------------------------------------------------------------------------------
               (Address of Principal Executive Offices)      (Zip Code)

Registrant's telephone number, including area code: (516) 333-8230
                                                    --------------------------

                                       N/A
- --------------------------------------------------------------------------------
         (Former Name or Former Address, if Changed Since Last Report.)


<PAGE>



ITEM 7.       FINANCIAL STATEMENTS, PRO FORMA FINANCIAL INFORMATION AND EXHIBITS

         (c)  Exhibits:

         Agreement and Plan of Merger dated November 7, 1995 among United States
         Surgical Corporation, USSC Acquisition Corporation, Surgical Dynamics
         Inc., and E-Z-EM, Inc. and Calmed Laboratories, Inc. and E-Z-SUB, Inc.

         [Portions of this Exhibit are subject to a Request for Confidential
         Treatment filed with the Commission.]

EXHIBIT INDEX                                                         PAGE NO.

         (10)     Agreement and Plan of Merger dated November 7, 1995
                  among United States Surgical Corporation, USSC
                  Acquisition Corporation, Surgical Dynamics Inc., and
                  E-Z-EM, Inc. and Calmed Laboratories, Inc. and
                  E-Z-SUB, Inc............................................4

                  [Portions of this Exhibit are subject to a Request for
                  Confidential Treatment filed with the Commission.]


                                  -2-


<PAGE>

                                    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.

                                               E-Z-EM, INC.

Dated: May 8, 1996                         By: /S/ DENNIS J. CURTIN
                                               --------------------
                                               Name: Dennis J. Curtin
                                               Title: Vice President -- Finance
                                               (Chief Accounting and Finance
                                               Officer)


                                       -3-


<PAGE>
                          AGREEMENT AND PLAN OF MERGER

                             DATED NOVEMBER 7, 1995

                                      AMONG

                       UNITED STATES SURGICAL CORPORATION

                          USSC ACQUISITION CORPORATION

                             SURGICAL DYNAMICS INC.

                                       AND

                 E-Z-EM, INC. AND CALMED LABORATORIES, INC. AND
                                  E-Z-SUB, INC.





<PAGE>

         This  Agreement  and Plan of Merger  ("Agreement")  is made and entered
into  November  7, 1995 by and  among  United  States  Surgical  Corporation,  a
Delaware  corporation  ("USSC"),  USSC  Acquisition   Corporation,   a  Delaware
corporation  ("USSC  Transitory  Sub"),   Surgical  Dynamics  Inc.,  a  Delaware
corporation ("SDI"), and E-Z-EM, INC., a Delaware corporation ("E-Z-M"),  CalMed
Laboratories,  Inc.,  a Nevada  corporation  ("CalMed")  and  E-Z-SUB,  Inc.,  a
Delaware corporation ("E- Z-SUB").

         Whereas,  it is the  intention of the parties that USSC should  acquire
SDI in a  transaction  qualifying  for U.S.  Federal  income tax  purposes  as a
taxable purchase by USSC of the Shares (as defined herein).

         Now Therefore,  intending to be legally bound,  and in consideration of
the premises and mutual covenants  contained herein, the parties hereto agree as
follows:

                                    ARTICLE I
                                   DEFINITIONS

         Section 1.01 DEFINED TERMS.  As used in this  Agreement,  the following
terms have the  meanings  set forth in this  Article I. All  references  to "it"
shall also refer to "him" or "her" as  appropriate  to refer to  individuals  as
well as entities.

         "Acquisition  Proposal"  means any  proposal by any  Person(s)  for the
acquisition of, or merger or other business  combination  involving,  SDI or the
sale of any  securities  or a  substantial  portion of the assets of SDI, or any
right,  title or  interest  in the Two  Products  other  than  the  transactions
contemplated by this Agreement.

         "Action" means any court action,  suit or proceeding,  whether civil or
criminal or in law or in equity.

         "Affiliate"  means, with respect to any Person,  any Person directly or
indirectly controlling,  controlled by, or under common control with, such other
Person.  The term "control"  (including,  with  correlative  meaning,  the terms
"controlled  by" and "under common control  with"),  as used with respect to any
Person, means the possession, directly or indirectly, of t he power to direct or
cause the  direction of the  management  and  policies of such  Person,  whether
through ownership of voting securities, by contract or otherwise.

         "Bankruptcy  Event" means any of the following:  (i) filing by SDI of a
petition in bankruptcy, or of reorganization,  or for an arrangement pursuant to
the U.S.  Bankruptcy Code, or any similar federal or state or foreign law, or an
adjudication  by a court  or  tribunal  of  competent  jurisdiction  that SDI is
bankrupt or insolvent,  or an assignment by SDI for the benefit of creditors, or
an  admission in writing by SDI of its  inability to pay its debts  generally as
they

                                       -2-

<PAGE>
become due, or the dissolution of SDI,  whether  voluntary or otherwise,  or the
suspension  by SDI of the payment of any of its  obligations,  or any  corporate
action take by SDI in furtherance  of any of the  foregoing;  (ii) a petition or
answer  proposing the adjudication of SDI as a bankrupt,  or its  reorganization
under the U.S.  Bankruptcy Code, or any similar federal or state or foreign law,
is filed in any court,  and (aa) SDI shall consent to such filing,  or (bb) such
petition or answer is not discharged or denied within sixty (60) days after such
filing;  or (iii) a receiver,  trustee or liquidator (or other similar official)
is appointed for or takes  possession or charge of SDI or  substantially  all of
SDI's assets.

         "Bonus  Payment"  means the amount set forth in Section  3.04(b) of the
SDI Disclosure Schedule payable to each Person listed in such Section.

         "Business   Condition"   means  with   respect  to  a  Person  and  its
subsidiaries,  taken as a whole,  their  business  or  properties  or  financial
condition including, in the case of SDI, the Two Products.

         "Business Day" means any day other than  Saturday,  Sunday or a federal
legal holiday.

         "CalMed Merger Consideration" means $27,021,519.00.

         "CalMed  Shares" means 215,600  shares of SDI Series A Common Stock and
1,548,400 shares of SDI Class B Stock.

         "Closing" means the consummation of the Merger.

         "Code" means the Internal Revenue Code of 1986, as amended.

         "Damages"  means  any and all  claims,  damages,  losses,  liabilities,
payments,  costs or expenses of any nature  whatsoever  and expenses  including,
without  limitation,  reasonable  out of pocket  expenses of  investigation  and
outside counsel fees and expenses.

         "Deposit Escrow  Agreement" means the escrow agreement by and among the
Escrow Agent,  USSC, USSC Transitory Sub and the  Shareholders  substantially in
the form of EXHIBIT A.

         "ERISA" means the Employee  Retirement  Income Security Act of 1974, as
amended.

         "Escrow Agent" means Chase Manhattan Bank N.A. and it successors.

         "E-Z-SUB Merger Consideration" means $28,124,438.00.

         "E-Z-SUB  Shares" means 224,400 shares of SDI Series A Common Stock and
1,611,600 shares of SDI Class B Stock.


                                       -3-

<PAGE>
                        [CONFIDENTIAL MATERIAL OMITTED.]

         "FDA" means the U.S.  Food and Drug  Administration  and any  successor
Governmental Body performing its functions.

         "FDA  Approvals"  means  approvals  obtained  from the  FDA,  including
without limitation,  510(k)s,  NDAs and PMAs,  necessary to the operation of the
business of SDI as it relates to the Two Products.

         "Fusion  Cage"  means SDI's  proprietary  threaded  spinal  fusion cage
technology for interbody fusion and the treatment of lower back pain.

         "Governmental   Approvals"   means   permits,    licenses,    consents,
authorizations,  approvals and registrations from Governmental Bodies including,
without  limitation,  the FDA and the U.S.  Environmental  Protection Agency and
foreign Governmental Bodies with equivalent or similar authority.

         "Governmental  Body"  means  any  agency,  bureau,  commission,  court,
department,  political  subdivision,  tribunal,  or other instrumentality of any
government, whether federal, state, or local, domestic or foreign.

         "HSR Act" means the  Hart-Scott-Rodino  Antitrust  Improvements  Act of
1976, as amended.

         "Interim Balance Sheet" means the interim consolidated balance sheet of
SDI as of the last day of the month  immediately  preceding  the  Closing  Date,
delivered to USSC pursuant to Section 5.02.

         "Laws"  means   statutes,   laws,   regulations,   rules,   ordinances,
guidelines,  judgments, orders, decisions or interpretations of any Governmental
Body.

         "Lien"  means,  with  respect to any asset or property,  any  mortgage,
lien,  (voluntary or involuntary)  pledge,  hypothecation,  charge,  preference,
priority,  security interest, claim, right or encumbrance of any kind in respect
of such asset or property, and for the purposes of this Agreement,  SDI shall be
deemed to own subject to a Lien any asset which it has acquired or holds subject
to the interest of another Person under any conditional sale agreement,  capital
lease or any financing  lease having  substantially  the same economic effect as
the foregoing or other title retention agreement relating to such asset.

         "Material Adverse Effect" means a material adverse effect on a Person's
Business Condition. [CONFIDENTIAL MATERIAL OMITTED]

         "Merger"  means the merger  whereby USSC  Transitory Sub is merged with
and into SDI and SDI is the surviving corporation. It is understood and intended
by the parties that USSC Transitory Sub is a newly-formed transitory subsidiary,
the sole function of which is to


                                       -4-
<PAGE>
facilitate the acquisition by USSC of the Shares in a transaction qualifying for
U.S. Federal income tax purposes as a taxable purchase of the Shares by USSC.

         "Nucleotome" means SDI's proprietary technology for open and endoscopic
lumbar discectomy.

         "Optionee"  means a Person  holding  an SDI  Option  who is  listed  in
Section 3.02 of the SDI Disclosure Schedule.

         "Option  Share  Payment"  means  $13.42  for each share of SDI Series A
Common Stock with respect to which an Optionee holds an SDI Option.

         "Outside Date" means the date which is four (4) months from the date of
this Agreement.

         "Person" means any individual, corporation,  partnership,  association,
trust or other entity or organization, including a governmental or political sub
division or any agency or instrumentality thereof.

         "SDI Capital Stock" means all of the capital stock of SDI including all
SDI Series A Common Stock and SDI Class B Stock.

         "SDI  Options"  means  options or  warrants  to  acquire  shares of SDI
Capital  Stock  granted  prior to the date hereof which are set forth in the SDI
Disclosure Schedule.

         "SDI  Series A Common  Stock"  means all of the issued and  outstanding
shares of Series A Common Stock, par value $.01, of SDI.

         "SDI Class B Stock" means all of the issued and  outstanding  shares of
Class B Stock, par value $.01, of SDI

         "SDI's  Knowledge" means only and is limited to the actual knowledge of
Henry J. Klyce, SDI's chief executive officer, of the relevant particular facts,
without further inquiry or investigation on his part.

         "Securities Act" means the Securities Act of 1933, as amended.

         "Shareholders" means E-Z-SUB and CalMed.

         "Shares" means all of the E-Z-SUB Shares and CalMed shares.

         "Subsidiary" means, with respect to an entity, any corporation or other
organization (a) of which securities or other ownership interest having ordinary
voting  power to elect a majority  of the board of  directors  or other  Persons
performing  similar  functions are directly or indirectly  owned by such entity,
(b) of which  such  entity is a  partner  or is,  directly  or  indirectly,  the
beneficial  owner  of  fifty  percent  (50%)  or more  of any  class  of  equity
securities or

                                       -5-
<PAGE>

equivalent  profit  participation  interest,  or (c) with  respect to which such
entity  possesses  the ability to  substantially  influence  the  management  or
policies of any other corporation or other organization by means of a management
contract or otherwise.

         "Surviving Corporation" means SDI, after consummation of the Merger.

         "Tax"  along  with  the  correlative  "Taxes"  and  "Taxable"  has  the
following  meaning (i) any net income,  alternative or add-on minimum tax, gross
income, gross receipts, sales, use, ad valorem,  transfer,  franchise,  profits,
license,   withholding,   payroll,  employment,   excise,  severance,   escheat,
abandonment,  stamp, occupation,  premium,  property,  environmental or windfall
profit tax, custom, duty or other tax, governmental fee or other like assessment
or charge of any kind  whatsoever,  together  with any  interest or any penalty,
addition to tax or additional amount imposed by any Taxing Authority responsible
for the imposition of any such tax (domestic or foreign), and (ii) any liability
for the payment of any amounts of the type described in (i) as a result of being
a member of an  affiliated,  consolidated,  combined  or  unitary  group for any
Taxable period prior to the Closing Date.

         "Taxing Authority" means any Governmental Body responsible for imposing
any Tax.

         "Total Bonus  Amount"  means  $571,658.00,  the  aggregate of all Bonus
Payments to all Persons.

         "Total  Option  Payments"  means  $3,982,385.00,  the  aggregate of all
Option Share Payments to all Optionees.

         "Total Merger Consideration" means $59,700,000.

         "Two Products" means the Fusion Cage and the Nucleotome.

         Section 1.02 OTHER TERMS.  In addition to the foregoing  defined terms,
the  following  terms  shall  have the  meanings  set  forth  in the  referenced
Articles,  Sections and Schedules of this  Agreement.  All Article,  Section and
Schedule  numbers used herein  refer to Articles and Sections of this  Agreement
and Exhibits and Schedules attached hereto or delivered simultaneously herewith,
unless otherwise specifically described.

         TERM                                          SECTION
         ----                                          -------
         Accredited Investor                            4.04
         Audited Balance Sheet                          3.10
         Benefit Arrangement                            3.23
         By-Laws                                        3.01
         CERCLA                                         3.09
         Certificate of Incorporation                   3.01
         Certificate of Merger                          2.01
         Claim                                          9.02


                                       -6-


<PAGE>
         Closing Date                                   2.03
         COBRA                                          3.24
         Contracts                                      3.19
         Deposit                                        2.05
         Distributorship Agreements                     3.26
         Effective Time                                 2.01
         Employee Plans                                 3.23
         Environmental Laws                             3.09
         Equipment                                      3.14
         GAAP                                           3.10
         GCLD                                           2.01
         Harbor Bay Lease Claim                         5.03
         Hazardous substances                           3.09
         Escrow Fund                                    2.04
         Hold Back Claim Period                        10.02
         Hold Back Funds                                2.04
         Hold Back Period                              10.01
         Indemnified Party                              9.02
         Indemnitees                                    9.02
         Intellectual Property                          3.17
         Inventories                                    3.14
         JAMS                                          13.03
         Notified Party                                 5.12
         Notifying Party                                5.12
         Professionals                                  3.15
         Qualified Plan                                 3.23
         Release                                        3.09
         Reserve                                        5.03
         Rules                                         13.03
         Scheduled Closing Date                         2.03
         SDI Claims                                     9.02
         SDI Disclosure Schedule        Article III Preamble
         SDI Indemnitees                                9.02
         SDI Post-Closing Returns                       5.15
         SDI Returns                                    3.27
         SDI Subsidiary Securities                      3.02
         Shareholders' Financial Basket                 9.02
         Shareholders' Non Financial Basket             9.02
         Surviving Corporation Shares                   2.02
         Termination                                    8.03
         Underground Storage Tank                       3.09
         USSC Basket                                    9.02
         USSC Claims                                    9.02
         USSC Indemnitees                               9.02
         Vendors                                        3.26

                                   ARTICLE II
                   THE MERGER AND SHAREHOLDER LOAN FORGIVENESS

         Section 2.01 THE MERGER.
                  (a) Subject  to  the  provisions  of  this  Agreement,  at the
Effective Time (as hereinafter defined) and in accordance with


                                       -7-

<PAGE>
the  General  Corporation  Law of the  State  of  Delaware  (the  "GCLD"),  USSC
Transitory Sub shall be merged with and into SDI, the separate existence of USSC
Transitory Sub shall cease, and SDI shall continue as the Surviving  Corporation
under the laws of the State of Delaware as a wholly-owned subsidiary of USSC; it
being understood,  agreed and intended by the parties that the Merger be treated
for U.S. Federal income tax purposes as a taxable purchase of the Shares by USSC
pursuant to the principles enunciated in Revenue Ruling 73-427.

                  (b) The Merger shall become effective at the time of filing of
a Certificate of Merger in  substantially  the form attached hereto as EXHIBIT B
(the  "Certificate  of  Merger")  with the  Secretary  of State of the  State of
Delaware in  accordance  with the  provisions  of Section  251 of the GCLD.  The
Certificate  of Merger shall be filed at the time of the  Closing.  The date and
time when the Merger shall become  effective is  hereinafter  referred to as the
"Effective Time".

                  (c) At the Effective Time, (i) the separate  existence of USSC
Transitory Sub shall cease and USSC Transitory Sub shall be merged with and into
SDI, (ii) the Certificate of Incorporation of the Surviving Corporation shall be
amended as set forth on Annex A to the Certificate of Merger,  (iii) the By-laws
of USSC  Transitory  Sub as in effect  immediately  prior to the Effective  Time
shall be the By-laws of the  Surviving  Corporation,  (iv) the  officers of USSC
Transitory  Sub holding such positions  immediately  prior to the Effective Time
shall be the officers of the Surviving Corporation and (v) the directors of USSC
Transitory Sub immediately prior to the Effective Time shall be the directors of
the Surviving Corporation.

                  (d) From and after the Effective  Time,  the Merger shall have
all the effects provided by applicable Law.

         Section 2.02 CONVERSION OF SECURITIES. At the Effective Time, by virtue
of the Merger and without any action on the part of SDI or USSC  Transitory  Sub
or the holder of any of the following securities:

                  (a) The E-Z-SUB  Shares shall be converted  into and represent
the right to receive,  and be  exchangeable  for,  as  provided in Section  2.03
hereof, the E-Z-SUB Merger Consideration, in cash, without any interest thereon.

                  (b) The CalMed  Shares shall be converted  into and  represent
the right to receive, and shall be exchangeable for, as provided in Section 2.03
hereof, the CalMed Merger Consideration, in cash, without any interest thereon.

                  (c) Each share of common stock,  $.01 par value per share,  of
USSC Transitory Sub then issued and outstanding shall be


                                       -8-


<PAGE>

converted  into,  and become one fully  paid and  nonassessable  share of common
stock par value $.01 per share, of the Surviving  Corporation  (all such shares,
the "Surviving Corporation Shares").

                  (d) Each  outstanding  SDI Option set forth in Section 3.02 of
the SDI Disclosure Schedule,  which Section 3.02 also sets forth the name of the
Optionee  thereof,  shall be canceled and converted into and represent the right
to receive, and shall be exchangeable for, cash in an amount equal to the Option
Share  Payment  multiplied  by the  number  of  shares  of SDI  Series  A Common
underlying such SDI Option, without any interest thereon.

         Section 2.03 CLOSING DATE AND EFFECTIVE TIME.

                  (a) The Closing  shall occur within  three (3)  Business  Days
after the  applicable  period of time  necessary  under the HSR Act before  such
transaction  can be  consummated  has expired (the  "Scheduled  Closing  Date"),
PROVIDED  that the other  conditions to Closing set forth in Article VII of this
Agreement shall have been satisfied or waived ; and PROVIDED,  FURTHER,  that if
all such conditions  have been so satisfied or waived,  but the Closing does not
occur on the  Scheduled  Closing  Date other than as the result of any action or
inaction of SDI or the  Shareholders,  then the  condition  set forth in Section
7.01(g)  shall be deemed  satisfied  at all times  thereafter  and USSC and USSC
Transitory Subsidiary shall not be entitled to terminate this Agreement pursuant
to Section 8.01(ii). The day on which the Closing occurs is the "Closing Date".

                  (b) At the Closing:

                  (i) the E-Z-SUB  Merger  Consideration  and the CalMed  Merger
Consideration  shall be paid by USSC to E-Z-SUB  and  CalMed,  respectively,  in
accordance  with payment  instructions  received from each prior to the Closing,
after  the  Deposit  is  applied  thereto  as  provided  in the  Deposit  Escrow
Agreement;

                 (ii) an  Option  Share  Payment  due  each  Optionee,   net  of
applicable  withholding  taxes,  shall  be paid by  USSC  to such  Optionee,  in
accordance  with payment  instructions  received from such Optionee at least two
(2) Business Days prior to the Closing, failing which such payment shall be made
by check to such Optionee's last known address on SDI's records; and

                (iii) a Bonus  Payment,  net of  applicable  withholding  taxes,
shall  be paid by USSC to each  Person  entitled  thereto,  in  accordance  with
payment  instructions  received  from such person at least two (2) Business Days
prior to the Closing,  failing  which such payment shall be made by check to the
last known address of such Person on SDI's records.

                 (iv) SDI will pay One Hundred  Thousand  Dollars  ($100,000) to
each of the Shareholders in full satisfaction and


                                       -9-


<PAGE>
liquidation of all outstanding unpaid principal and interest on all loans due or
to become due by SDI or any SDI Subsidiary to the  Shareholders or any Affiliate
of  the  Shareholders  existing  on  the  Closing  Date.   Simultaneously,   the
Shareholders will deliver to USSC any promissory notes respecting such loans and
mark them canceled.  USSC shall make such payments to the Shareholders on behalf
of SDI at the Closing.

         Section 2.04 HOLDBACK FUNDS.  Notwithstanding the provisions of Section
2.03(b)(i),  Five Hundred Ten Thousand Dollars  ($510,000) of the E-Z-SUB Merger
Consideration and Four Hundred Ninety Thousand Dollars  ($490,000) of the CalMed
Merger Consideration  (collectively,  the "Holdback Funds") shall not be paid to
the Shareholders at Closing, but instead shall be withheld by USSC in accordance
with Article X of this Agreement.

         Section 2.05 DEPOSIT.  Upon execution of this Agreement by all parties,
USSC shall deposit Four Million Seven Hundred Thousand  Dollars  ($4,700,000.00)
(the "Deposit") with the Escrow Agent, pursuant to the Deposit Escrow Agreement.
The Deposit  shall be held by the Escrow  Agent and  invested in a money  market
account or other investment in accordance with the Deposit Escrow Agreement. The
regular fees and expenses of the Escrow Agent shall be borne equally by USSC, on
the one hand,  and by the  Shareholders,  on the other hand. The Deposit will be
held and applied by the Escrow Agent as follows:

         (a) If there is a Closing, the Deposit (with accrued interest) shall be
applied to the payments due from USSC to the Shareholders on Closing.

         (b) The Deposit  shall be paid to USSC in  accordance  with the Deposit
Escrow  Agreement  (1) if USSC  terminates  this  Agreement  pursuant to Section
8.01(ii),  (iii) or  (iv),  (2) if the  Shareholders  terminate  this  Agreement
pursuant to Section 8.01(iii), or (3) if (i) the conditions to Closing set forth
in  Section  7.02 are  satisfied  in all  material  respects  on or  before  the
Scheduled Closing Date, (ii) the conditions to Closing set forth in Section 7.03
are satisfied on or before the Scheduled Closing Date, and (iii) any one or more
of SDI and either Shareholder fails to proceed with the Closing on the Scheduled
Closing Date.

         (c) The Deposit shall be paid to the  Shareholders  in accordance  with
the Deposit Escrow  Agreement (1) if the  Shareholders  terminate this Agreement
pursuant to Section 8.01(v) or (2) if (i) the conditions to Closing set forth in
Section 7.01 are  satisfied in all material  respects on or before the Scheduled
Closing  Date,  (ii) the  conditions  to Closing  set forth in Section  7.03 are
satisfied  on or before  the  Scheduled  Closing  Date , and (iii)  USSC or USSC
Transitory  Sub  fails  to  proceed  with  the  Closing.  Such  payments  to the
Shareholders shall be deemed

                                      -10-


<PAGE>
liquidated  damages  sustained  by the  Shareholders  and  shall not be deemed a
penalty or  forfeiture,  the  parties  having  agreed  that the exact  amount of
damages sustained by the Shareholders are difficult, impractical and speculative
to determine. The Shareholders acknowledge and agree that the provisions of this
Section   2.05(c)  shall  provide  the  sole  and  exclusive   recourse  of  the
Shareholders with respect to any claims or rights against USSC because of USSC's
or USSC Transitory Sub's failure or inability for any reason to proceed with the
Closing on or before the Outside  Date.  USSC  acknowledges  and agrees that the
liquidated  damages  amount is  reasonably  proportionate  to the damages to the
Shareholders  which would be caused by a failure to consummate the  transactions
contemplated  hereby  due to  such  termination  or  failure  by  USSC  or  USSC
Transitory Sub to proceed and are reasonable under the circumstances existing as
of the date of this Agreement.

         (d) If this Agreement is terminated  pursuant to Section  8.01(i),  the
Deposit  (with  accrued  interest)  shall  be  refunded  to  USSC or paid to the
Shareholders, or in part to each, as USSC and the Shareholders determine.

                                   ARTICLE III
                  REPRESENTATIONS AND WARRANTIES OF SDI AND THE
                                  SHAREHOLDERS

         SDI and each Shareholder hereby severally and not jointly represent and
warrant to USSC and USSC  Transitory  Sub,  except (i) with  respect to Sections
3.03 and 3.05 and (ii) as disclosed in the Disclosure  Schedule  attached hereto
(the "SDI Disclosure Schedule") as an exception to a representation and warranty
in this  Agreement  (any matter or  information  described in the SDI Disclosure
Schedule with respect to any  representation or warranty in any Section shall be
deemed an exception with respect to all  representations  and warranties in this
Article III), as follows:

         Section 3.01 ORGANIZATION; AUTHORITY AND APPROVAL.

         (a) SDI is a corporation  duly  incorporated,  validly  existing and in
good  standing  under the laws of the State of Delaware.  SDI has the  corporate
power to execute,  deliver and perform  this  Agreement  and to  consummate  the
transactions  contemplated  hereby.  This  Agreement  constitutes  the valid and
binding agreement of SDI,  enforceable  against it in accordance with its terms,
subject to bankruptcy,  insolvency  and other similar laws affecting  creditors'
rights generally and to general equitable  principles,  including the discretion
of a court to grant equitable relief.  SDI has the corporate power and authority
to own and lease the  properties  and assets it now owns and leases and to carry
on its business as and where such  properties and assets are now owned or leased
and such business is now conducted.  SDI has heretofore  delivered to USSC true,
correct and complete  copies of its restated  certificate of  incorporation  and
by-laws or equivalent governing instruments,  each as amended to the date hereof
(respectively, the "Certificate of

                                      -11-


<PAGE>

Incorporation" and "By-Laws").  SDI is duly licensed or qualified to do business
as a foreign  corporation and is in good standing in all  jurisdictions in which
the character of the property and assets now owned or leased by it or the nature
of the business now  conducted by it requires it to be so licensed or qualified,
except  where  the  failure  to be so  licensed  or  qualified  or to be in good
standing, would not have a Material Adverse Effect on SDI's Business Condition.

         (b) The SDI  Disclosure  Schedule  sets  forth the name and  respective
jurisdiction of incorporation or organization of all SDI  Subsidiaries.  Each of
SDI's  Subsidiaries  is a  corporation  or other  entity  duly  incorporated  or
otherwise  organized,  validly  existing  and in good  standing  (or  local  law
equivalent)  under the Laws of its jurisdiction of  organization.  Each of SDI's
Subsidiaries  has  the  corporate  power  and  authority  to  own or  lease  its
properties  and  assets to carry on its  business  in the  manner in which  such
business is now conducted.  SDI has heretofore  delivered to USSC true,  correct
and complete copies of the certificate of incorporation,  by-laws, or equivalent
governing  instruments,  each as  amended  to the  date  hereof  for  each  such
Subsidiary.  Each of SDI's  Subsidiaries  is duly  licensed or  qualified  to do
business as a foreign  corporation and is in good standing in all  jurisdictions
in which the  character  of the property and assets now owned or leased by it or
the nature of the business now  conducted by it requires it to be so licensed or
qualified,  except  where the failure to be so licensed or qualified or to be in
good  standing,  would not have a  Material  Adverse  Effect  on SDI's  Business
Condition.

         Section 3.02 CAPITALIZATION.

         (a) The authorized  capital stock of SDI consists of 16,000,000  shares
of COMMON  STOCK,  divided  into two  classes,  12,840,000  shares of SDI Common
Stock,  par value $0.01,  of which  4,000,000  shares of "Series A Common Stock"
have been  designated,  and  3,160,000  shares  of SDI Class B Stock,  par value
$0.01.  As of the date hereof,  there are 440,000  shares of SDI Series A Common
Stock outstanding and 3,160,000 shares of SDI Class B Stock  outstanding.  As of
the date hereof, no SDI Capital Stock is held by SDI in its treasury. All of the
issued and outstanding shares of SDI Capital Stock have been duly authorized and
are validly issued and outstanding,  fully paid and  non-assessable.  All of the
outstanding  capital stock of, or other ownership interests (the "SDI Subsidiary
Securities")  in each SDI  Subsidiary is owned by SDI,  directly or  indirectly,
free and  clear of any Lien and  free of any  other  limitation  or  restriction
(including any  restriction on the right to vote,  sell or otherwise  dispose of
such capital  stock or other  ownership  interests).  There are  outstanding  no
subscriptions, options, warrants or other agreements, or conversion, exchange or
other  rights of any kind  other  than this  Agreement  entitling  any Person to
purchase or otherwise acquire any


                                      -12-


<PAGE>

SDI Capital Stock or any SDI  Subsidiary  Securities and no SDI Capital Stock or
any SDI  Subsidiary  Securities is reserved for issuance for any purpose.  There
are no agreements,  commitments or restrictions  relating to ownership or voting
of  SDI  Capital  Stock  or  other  securities  of SDI  or  any  SDI  Subsidiary
Securities, other than any shareholders' agreements which shall be terminated in
accordance  with Section 5.09 hereof.  The SDI  Disclosure  Schedule  contains a
complete  and  correct  list of the  name,  address  and  shareholdings  of each
Shareholder.

         Section 3.03 CONTROL SHARES. Each Shareholder severally and not jointly
represents and warrants to USSC that (a) it is the record and  beneficial  owner
of the SDI  Capital  Stock set forth in the SDI  Disclosure  Schedule,  free and
clear of any Liens,  other than any  shareholders'  agreements  to be terminated
prior to the Closing Date in  accordance  with Section 5.09 hereof;  (b) it will
have  on the  Closing  Date  full  legal  power,  right  and  authority  and all
authorizations  and  approvals  required  to execute,  deliver and perform  this
Agreement  and  to  consummate  the  transactions  contemplated  hereby  and  to
surrender the  certificates to its Shares free and clear of all Liens;  (c) this
Agreement has been duly and validly  executed and delivered by such  Shareholder
and,  this  Agreement   constitutes  a  valid  and  binding  agreement  of  such
Shareholder  enforceable  against such Shareholder in accordance with its terms,
subject to bankruptcy,  insolvency  and other similar laws affecting  creditors'
rights generally and to general equitable  principles,  including the discretion
of a  court  to  grant  equitable  relief;  (d)  upon  the  consummation  of the
transactions  contemplated hereby in accordance with the terms hereof, USSC will
own one hundred  percent (100%) of the issued and  outstanding  capital stock of
the  Surviving  Corporation  and, (e) such  Shareholder  is duly  organized  and
validly  existing  in  good  standing  under  the  laws  of  the  state  of  its
incorporation.

         Section 3.04 CERTAIN INTERESTS.

         (a) Except for liabilities  arising under this  Agreement,  neither SDI
nor any SDI Subsidiary owns any note, bond,  debenture or other indebtedness and
is not a creditor,  of any Shareholder or any Affiliate of any Shareholder,  and
no Shareholder or any Affiliate of any  Shareholder or any employee of SDI or an
SDI  Subsidiary  is holder of any note,  bond,  debenture  or other  evidence of
indebtedness, or is otherwise a creditor, of SDI or any SDI Subsidiary.

         (b) No  officer  or  director  of  either  SDI or any  SDI  Subsidiary,
Shareholder,  or  any  immediate  relative  of any  such  officer,  director  or
Shareholder  residing  at  the  same  address  as  such  officer,   director  or
Shareholder,  is a party to or has any  interest  with  respect to any  material
contract,  agreement or arrangement  which relates to or affects in any material
respect the business of SDI or any SDI Subsidiary or has any material interest


                                      -13-


<PAGE>

in any  property,  real or  personal,  tangible or  intangible,  material to the
business of SDI or any SDI Subsidiary as currently conducted.

         Section 3.05 NO CONFLICT OR RESTRICTIONS.  Each  Shareholder  severally
and not jointly represents and warrants to USSC that the execution, delivery and
performance of this Agreement by such Shareholder does not, and the consummation
by such  Shareholder  of the  transactions  contemplated  hereby  will not:  (i)
violate  or  conflict  with its  articles  of  incorporation  or  by-laws or the
articles of incorporation or by-laws of SDI or any SDI Subsidiary; (ii) assuming
satisfaction  of the matters  referred to in clause (iii) of this Section  3.05,
violate or conflict with any Law currently  applicable to such Shareholder,  SDI
or  any  SDI   Subsidiary;   (iii)  require  any  filing,   approval,   consent,
authorization  or other action with respect to SDI, any SDI  Subsidiary  or such
Shareholder  other than pursuant to the HSR Act; (iv) violate or conflict  with,
result in a breach of,  constitute a default  under  (whether with notice or the
lapse of time or both),  or give rise to a right of termination or to accelerate
or permit the  acceleration of the  performance  required by, any material Lien,
loan  arrangement,  lease or other agreement or instrument to which SDI, any SDI
Subsidiary or such Shareholder is a party or by which SDI, any SDI Subsidiary or
such  Shareholder or any of their  respective  assets is bound; or (v) result in
the creation of any Lien upon the assets of SDI or any SDI Subsidiary  under any
such Lien, loan arrangement,  lease,  agreement or instrument,  which violation,
conflict,  failure to take action or obtain consent,  approval or authorization,
breach,  termination,  acceleration,  default or Lien specified in the foregoing
clauses (ii) through (v) would have a Material  Adverse Effect on SDI's Business
Condition.

         Section  3.06  LITIGATION.  There are no  Actions  pending  (which  for
purposes  of this  Section  require  that SDI or the SDI  Subsidiary  have  been
personally  served with process)  against SDI, any SDI  Subsidiary or any of its
assets, or, in connection with the business of SDI, any SDI Subsidiary or either
Shareholder  relating to the business of SDI or any SDI Subsidiary or any of the
officers, directors or employees of SDI or any SDI Subsidiary which would have a
Material  Adverse  Effect on SDI's Business  Condition.  Neither SDI nor any SDI
Subsidiary has been charged in writing by any Governmental Body with a violation
of any Laws  which  would  have a  Material  Adverse  Effect  on SDI's  Business
Condition.

         Section  3.07 NO  DEFAULT.  Neither  SDI nor any SDI  Subsidiary  is in
default under, and no condition exists that with notice or lapse of time or both
would constitute a default under, (i) any material Lien, loan arrangement, lease
or agreement or instrument of any nature to which SDI or any SDI Subsidiary is a
party or by which any of the assets of SDI or any SDI  Subsidiary is bound which
would have a Material  Adverse Effect on SDI's Business  Condition,  or (ii) any
judgment, order, or injunction of any Governmental Body

                                      -14-


<PAGE>

which would have a Material Adverse Effect on SDI's Business Condition.

         Section 3.08 COMPLIANCE.

         (a) Except where failure to be in compliance  would not have a Material
Adverse Effect on SDI's Business Condition, to SDI's knowledge, SDI and each SDI
Subsidiary is in material  compliance with all Laws of any  Governmental  Bodies
applicable  to the  business  and  operations  of SDI and each  SDI  Subsidiary,
PROVIDED THAT, no  representation  or warranty is made in this Section 3.08 with
respect  to any matter  with  respect  to which a  specific  representation  and
warranty is made by SDI or a Shareholder in this Agreement.

         (b) All of the issued and  outstanding  shares of SDI Capital Stock and
the SDI Options were issued in compliance  with, and SDI and each SDI Subsidiary
is in material compliance with, and has filed all reports or notices required to
be filed under,  all applicable  Laws of any  Governmental  Bodies  involving or
relating to the registration and issuance by them of securities.

         Section 3.09 ENVIRONMENTAL MATTERS.

         (a) Neither SDI nor any SDI  Subsidiary  has (i)  transported,  stored,
treated  or  disposed,  nor has any of them  allowed or  arranged  for any third
parties to transport,  store, treat or dispose of Hazardous  substances or other
waste to or at any location other than a site lawfully permitted to receive such
Hazardous  substances  or other  waste  for such  purposes,  nor has any of them
performed,   arranged   for  or  allowed  by  any  method  or   procedure   such
transportation,  storage, treatment or disposal in contravention of any Laws; or
(ii)  disposed,  or  allowed  or  arranged  for any third  parties to dispose of
Hazardous  substances or other waste upon real property  currently or previously
owned or leased by any of them during the period of occupation by SDI or any SDI
Subsidiary,  except as permitted by Law. For purposes of this Section 3.09,  (x)
"Hazardous  substance"  or  "Hazardous  substances"  shall mean any substance or
substances that are hazardous, and shall include, without limitation:  (A) those
substances included within the definitions of "Hazardous substances," "Hazardous
materials",  "toxic  substances,"  or "solid waste" in any of the  Environmental
Laws, or so designated in accordance  with any  Environmental  Laws; and (B) any
material,  waste or  substance  which  contains  (1) any  asbestos  (friable  or
non-friable),  (2) any polychlorinated  biphenyls in any concentration,  (3) any
petroleum  or  petroleum  product,  (4)  any  explosives,  (5)  any  radioactive
materials,  (6) any infectious wastes, or (7) any material which must be removed
from real  property  currently or  previously  owned or leased by SDI or any SDI
Subsidiary during the period of occupation by SDI or any SDI Subsidiary pursuant
to any administrative  order or enforcement  proceeding,  and (y) "Environmental
Laws" shall mean

                                      -15-


<PAGE>

all Federal, state and local environmental statutes and ordinances, and any rule
or  regulation  promulgated  thereunder,   and  any  order,  standard,   interim
regulations,  moratorium,  policy or guideline of any Governmental Body, and all
state and local counterparts of related statutes, laws, regulations,  and orders
and treaties of the United States (with any reference to any such  Environmental
Law or provision thereof, either in this Section or elsewhere in this Agreement,
being deemed to include any amendment, extension or successor thereof).

         (b) Neither  SDI nor any SDI  Subsidiary  has  Released  any  Hazardous
substance  on,  into or  beneath  the  surface  of any  parcel of real  property
currently or previously owned or leased by SDI or any SDI Subsidiary  during the
period of occupation by SDI or any SDI Subsidiary.  For purposes of this Section
3.09, the term  "Release"  shall mean  releasing,  spilling,  pumping,  pouring,
emitting,  emptying,  discharging,  injecting,  escaping, leaching, disposing or
dumping.

         (c) Neither SDI nor any SDI  Subsidiary has received any written notice
that SDI or any SDI Subsidiary is a potentially  responsible party for a Federal
or  state  environmental  cleanup  site  or  for  corrective  action  under  the
Comprehensive  Environmental Response Compensation and Liability Act of 1980, as
amended  ("CERCLA")  or any  other  applicable  Law.  Neither  SDI  nor  any SDI
Subsidiary  has submitted nor has any of them been required to submit any notice
pursuant to Section 103(c) of CERCLA with respect to real property  currently or
previously owned or leased by SDI or any SDI Subsidiary. Neither SDI nor any SDI
Subsidiary has received any written  request for  information in connection with
any  Federal  or  state  environmental  cleanup  site.  Neither  SDI nor any SDI
Subsidiary has been  requested in writing to nor has any of them  undertaken any
response  or  remedial  actions or  clean-up  actions of any kind at the written
request of any Governmental Body, or at the request of any other Person.

         (d) Neither SDI nor any SDI Subsidiary uses, and none of them have ever
used, any Underground  Storage Tank. There have not been any Underground Storage
Tanks  installed  by SDI or any SDI  Subsidiary  on real  property  currently or
previously  owned or leased by SDI or any SDI  Subsidiary . For purposes of this
Section 3.09, the term  "Underground  Storage Tank" shall have the meaning given
it in the Resource Conservation and Recovery Act, as amended.

         (e) There are no laws, regulations,  ordinances,  licenses,  permits or
orders relating to  environmental  or worker safety matters  requiring any work,
repairs,  construction  or capital  expenditures  with  respect to the assets or
properties  owned or leased by SDI and any SDI  Subsidiary.  The SDI  Disclosure
Schedule  identifies  for the period  SDI or any SDI  Subsidiary  occupied  real
property  leased  or  owned  (i)  all  environmental   audits,   assessments  or
occupational health studies undertaken by governmental agencies


                                      -16-


<PAGE>
or SDI, any SDI Subsidiary or any agents of any of them; (ii) the results of any
ground,  water, soil, air or asbestos monitoring  undertaken;  (iii) all written
communications  between SDI or any SDI  Subsidiary  and  environmental  agencies
within the past five  years;  and (iv) all written  citations  to SDI or any SDI
Subsidiary   issued   within  the  past  five  years  under  the  United  States
Occupational Safety and Health Act, as amended.

         Section 3.10 FINANCIAL INFORMATION.

         (a) SDI has  delivered  to USSC prior to the date  hereof a copy of the
consolidated  balance sheet of SDI as of May 31, 1993, as of May 31, 1994 and as
of May 31, 1995 (the  consolidated  balance sheet as of May 31, 1995, herein the
"Audited Balance Sheet") and the related consolidated  statements of operations,
shareholders'  equity and cash flows for the fiscal years then ended,  including
the notes  thereto,  the 1995  financial  statements  being  certified  by Grant
Thornton L. L. P. and the 1994 and 1993 financial  statements being certified by
Price Waterhouse.

         (b) The Audited Balance Sheet is complete and correct  according to the
books and records of SDI and  prepared in  accordance  with  generally  accepted
accounting  principles  ("GAAP")  consistently  applied and fairly  presents the
financial position of SDI as of May 31, 1995.

         Section 3.11  UNDISCLOSED  LIABILITIES.  Except for (i) liabilities set
forth,  reflected  in or reserved  against in the Interim  Balance  Sheet,  (ii)
professional  fees  which  are  incurred  by SDI  subsequent  to the date of the
Interim  Balance  Sheet,  (iii)  liabilities  and  obligations  incurred  in the
ordinary course of business consistent with past practice,  (iv) liabilities and
loss contingencies  disclosed on the SDI Disclosure Schedule, and (v) Taxes with
respect to the period from the date of the Interim  Balance Sheet to the Closing
Date that are accrued or reflected on SDI's financial  records as of the Closing
Date,  SDI has  and  will  have  on the  Closing  Date  no  liabilities  or loss
contingencies  (whether accrued,  unmatured,  contingent or otherwise or whether
due or to become due).

         Section 3.12 TITLE TO PROPERTIES. Subject to Section 3.17, SDI and each
SDI  Subsidiary  has good  title to or, in the case of leases,  valid  leasehold
interests in, all its tangible  properties and assets (real,  personal or mixed)
set forth in the Audited  Balance  Sheet  (other than those  tangible  assets or
properties disposed of in the ordinary course of business).

         Section 3.13 REAL PROPERTY. Neither SDI nor any SDI Subsidiary has ever
owned any real property. No SDI Subsidiary has ever leased any real property has
any liability in respect of any real property lease. SDI currently occupies only
the  real  property  pursuant  to the  lease  set  forth  in the SDI  Disclosure
Schedule.


                                      -17-

<PAGE>


         Section 3.14 INVENTORIES AND EQUIPMENT.

         (a) The raw  materials,  work in  process  and  finished  goods  in the
inventories  (the  "Inventories")  of SDI and each SDI  Subsidiary  shown on the
Audited Balance Sheet were valued at the lower of cost or market determined on a
first-in  first-out basis with proper allowance for obsolescence,  in accordance
with GAAP.

         (b) The machinery,  equipment,  tools, dies and fixtures (collectively,
"Equipment") used in the conduct of SDI's business is in operating condition.

         Section 3.15 PROFESSIONAL FEES. The SDI Disclosure  Schedule sets forth
a complete and correct  list  containing  the names of all current  providers of
financial,  legal  and  accounting  services  to SDI  and  each  SDI  Subsidiary
(hereinafter "Professionals"), which SDI Disclosure Schedule shall be updated by
SDI for additional  Professionals,  if any, between the period commencing on the
date hereof and ending immediately prior to the Closing.

         Section 3.16 RECEIVABLES. On or prior to the Closing Date, SDI and each
SDI Subsidiary will have collected all amounts, if any, loaned or advanced to or
otherwise  receivable from  consultants,  directors,  officers,  employees,  the
Shareholders and their  Affiliates,  including the amounts thereof,  if any, set
forth in the SDI Disclosure Schedule.

   
         Section 3.17  INTELLECTUAL  PROPERTY.  (a) The SDI Disclosure  Schedule
sets  forth  a list  complete  and  correct  in all  material  respects  of each
trademark  (whether  or not  registered),  trademark  application,  trade  name,
service mark,  copyright  registration,  patent, and patent application owned by
SDI or any  SDI  Subsidiary  with  respect  to the Two  Products  (collectively,
"Intellectual  Property").  With respect to each item of Intellectual  Property,
all of the right,  title and interest  therein is owned by, or subject to a duty
of assignment to, SDI or an SDI Subsidiary free and clear of any Lien,  license,
sublicense,  assignment or option.  To SDI's Knowledge,  neither SDI nor any SDI
Subsidiary with respect to any item of Intellectual Property has infringed,  has
received  written  notice  asserting  that  it  has  infringed  or is  currently
infringing  any  trademark,  trademark  application,  trade name,  service mark,
copyright,  patent,  patent application or any other intellectual property right
belonging to any other Person.

         (b) After the date  hereof and prior to the Closing  Date,  neither SDI
nor any SDI Subsidiary  shall,  without USSC's prior  approval,  in its sole and
absolute  discretion,  sell,  transfer  or  otherwise  dispose  of any of  their
respective rights, title and interests in and to (or enter into any agreement to
do  any  of  the  foregoing)  any  Intellectual  Property  or  other  intangible
proprietary  rights  (including  licenses,  shop rights and contract  rights and
arrangements) involving or related to the Two Products
    


                                      -18-


<PAGE>
   
and in which it had any right, title or interest in at any time on or subsequent
to the date hereof and prior to the Closing  Date  relating to the Two  Products
(including  technology,  know-how,  techniques and improvements or modifications
relating thereto) owned, acquired or developed by SDI or any SDI Subsidiary.

         (c) To SDI's  Knowledge,  there  are no  existing,  nor has any  Person
asserted any intellectual  property rights in the Intellectual  Property adverse
to the rights of SDI and each SDI Subsidiary in the Intellectual Property.

         (d) To SDI's  Knowledge,  there are no facts which would  render any of
SDI's  or SDI  Subsidiary's  rights  in the  Intellectual  Property  invalid  or
inadequate to protect the rights of SDI and each SDI Subsidiary therein.

         (e) Notwithstanding anything above to the contrary, to SDI's Knowledge,
(i) SDI owns all right, title and interest in and to the Two Products;  and (ii)
there has been no authorization and SDI has not authorized any disclosure of SDI
or SDI Subsidiary trade secrets or confidential  information with respect to the
Two Products  without  legally  enforceable  restrictions  on  disclosure by the
recipients thereof.

Notwithstanding  anything  set  forth in this  Agreement  or the SDI  Disclosure
Schedule to the  contrary,  in the event there is an  inconsistency  between the
representations   and  warranties  set  forth  in  this  Section  3.17  and  the
disclaimers  set  forth  in the  first  paragraph  of  Section  3.17  of the SDI
Disclosure  Schedule,  the representations and warranties set forth herein shall
govern and to that extent such disclaimers (but not the disclosures) shall be of
no force and effect.
    

         Section 3.18 ABSENCE OF CERTAIN CHANGES.  Except as expressly permitted
by the terms of this Agreement, since May 31, 1995, there has not been:

         (a) any Material Adverse Effect on SDI's Business Condition;

         (b) any material and adverse  change in the nature of the businesses or
in the manner of conducting the businesses of SDI or any SDI Subsidiary;

         (c) any change in the  accounting  methods or  principles of SDI or any
SDI Subsidiary;

         (d) any  declaration,  setting  aside or payment of dividend on, or any
other  distribution  with  respect to, any SDI Capital  Stock or SDI  Subsidiary
Securities or any repurchase, redemption or other acquisition of any SDI Capital
Stock or any SDI Subsidiary Securities;

                                      -19-


<PAGE>

         (e) other than in the ordinary  course of business,  any payment by SDI
to either  Shareholder  or an Affiliate of either  Shareholder,  any services or
charges by either Shareholder, or any Affiliate of either Shareholder, to SDI or
any SDI  Subsidiary or any other  transaction  (in any such case,  not of a type
described in subsection (d) of this Section 3.18) between either  Shareholder or
an  Affiliate  of  either  Shareholder  and  any  one or more of SDI and any SDI
Subsidiary;

         (f) any subscription,  option or warrant to purchase, or other right to
purchase  or  otherwise  acquire,  SDI  capital  stock,  any  security  or other
instrument convertible into any class of SDI Capital Stock or any SDI Subsidiary
Security, granted to any Person;

         (g) any  issuance of shares of SDI Capital  Stock  (including,  without
limitation,  treasury  shares) or SDI Subsidiary  Securities other than upon the
exercise of the SDI Options;

         (h) any transaction  made by SDI or any SDI Subsidiary  relating to any
of their  respective  assets or business  (including,  without  limitation,  the
acquisition  or  disposition  of assets)  other than in the  ordinary  course of
business,  as set  forth  or as  otherwise  permitted  or  contemplated  by this
Agreement;

         (i) except in the ordinary  course of business or to the  Shareholders,
any  incurrence,  assumption  or guarantee by SDI or any SDI  Subsidiary  of any
indebtedness  or liability for or in respect of borrowed money or any commitment
to do the same;

         (j) except in the  ordinary  course of  business,  any Lien  created or
assumed by SDI or any SDI Subsidiary on any of their respective assets to secure
indebtedness for borrowed money;

         (k)  except  in the  ordinary  course  of  business,  any  grant of any
severance or  termination  pay to any present or former  employee or director of
SDI or any SDI Subsidiary or any  compensation or benefits payable by SDI or any
SDI Subsidiary  under any employment  agreements or severance or termination pay
policies to any of their respective present or former employees;

         (l)  except in the  ordinary  course  of  business,  any  hiring of any
employee or any employment,  bonus or deferred  compensation  agreement  entered
into between either SDI or any SDI Subsidiary, on the one hand, and any of their
directors, officers, employees or former employees, on the other hand;

         (m) any material labor disputes or labor negotiations  involving SDI or
any SDI Subsidiary; or


                                      -20-


<PAGE>

         (n) any amendment of the Certificate of Incorporation or By-laws or the
articles of incorporation or by-laws of any SDI Subsidiary.

         Section 3.19 CONTRACTS. (a) The SDI Disclosure Schedule contains a list
complete and correct in all material  respects of all of the  following to which
SDI or any SDI  Subsidiary  is a party or by which any of them or any  amount of
any of their  respective  assets is bound,  whether written or oral involving or
which may involve in any one case any amount in excess of Fifty Thousand Dollars
($50,000) per annum (the "Contracts"):

              (i) any  management or employment  contract or other  contract for
personal services with any officer, consultant,  director, employee or any other
Person;

              (ii) any plan,  contract or  arrangement  providing  for  bonuses,
pensions,  deferred  compensation,  retirement  plan payments,  profit  sharing,
incentive pay, or for any other uninsured employee benefit plans;

              (iii) any plan,  contract or  arrangement  providing for insurance
(other  than  group  insurance  or which is  described  in clause  (ii)) for any
officer,  consultant,  director,  or  employee of SDI or any SDI  Subsidiary  or
members  of  their  families  (other  than  directors  and  officers   liability
policies);

              (iv) any labor  contracts or employment  agreements  providing for
liability for severance pay;

              (v) any lease,  option, or agreement  relating to real property to
which SDI or any SDI Subsidiary is a party;

              (vi) any secrecy,  non-competition  or other  agreement that could
have a Material Adverse Effect on SDI's Business Condition;

              (vii) any license,  sublicense or other  agreement to which SDI or
any SDI  Subsidiary  is a party  (whether as licensor or licensee)  involving or
relating to the Intellectual Property;

              (viii) any contract not in the  ordinary  course of business  that
involves or relates to (A) capital expenditures by SDI or any SDI Subsidiary, or
(B) disposition of any amount of assets of SDI or any SDI Subsidiary;

              (ix) any  non-recurring  contract  between any  Shareholder or any
Affiliate of any Shareholder, on the one hand, and SDI or any SDI Subsidiary, on
the other hand, that is not cancelable without cause on thirty (30) days or less
notice;


                                      -21-

<PAGE>

              (x) any contract relating to the rental or use of equipment, other
than  personal  property  or  fixtures  by SDI or any SDI  Subsidiary  involving
payment of fixed or contingent annual rentals;

              (xi) any license or franchise  agreement  involving SDI or any SDI
Subsidiary, either as licensor or licensee or as franchiser or franchisee;

              (xii)  any  loan  agreements,  guaranties,  bonding  arrangements,
repurchase   agreements,   agency  agreements,   manufacturers'   representative
agreements, commission agreements, financing agreements, and security agreements
that are material to SDI's Business Condition;

              (xiii) any joint venture contract, including those currently under
negotiation;

              (xiv) any  contract or agreement  for the  purchase of  materials,
supplies  or  services,  including  individual  purchase  orders not made in the
ordinary course of business; and

              (xv) any other  contract not of a type covered by or  specifically
excluded  from the  coverage of any of the other items of this  Section 3.19 and
not  cancelable  on thirty  (30) days or less  notice  without  penalty or other
financial obligation or, if not so cancelable, involving future payment by or to
SDI or any SDI Subsidiary.

         (b) SDI has delivered to USSC true and correct  copies of all Contracts
described  in this  Section  3.19 or listed on any  other  schedule  that are in
writing, and complete and correct (in all material respects) descriptions of all
contracts  that are not in writing.  Each of such Contracts is valid and in full
force and effect and  neither  SDI nor any SDI  Subsidiary  is in default in any
material respect under the terms thereof.

         Section  3.20 POWERS OF ATTORNEY.  Other than powers of attorney  given
its counsel and those given in the ordinary course of business,  neither SDI nor
any SDI  Subsidiary  has any powers of attorney  or  comparable  delegations  of
authority  outstanding  in  connection  with  its  business,  and  none  of such
delegations  of authority  would not be  revocable by SDI or any SDI  Subsidiary
following the Closing Date.

         Section  3.21  BANK  ACCOUNTS;   DEPOSITS.  Neither  SDI  nor  any  SDI
Subsidiary  has any bank accounts or safe deposit boxes or credit  arrangements,
and as of the  date  specified  in the SDI  Disclosure  Schedule,  there  are no
Persons  presently  authorized  to draw  thereon,  to have access  thereto or to
obtain credit therewith.

         Section 3.22 PRODUCT LIABILITY; INSURANCE.


                                      -22-


<PAGE>

         (a) The SDI Disclosure  Schedule sets forth all known claims (which for
purposes  of this  Section  requires  that SDI shall  have  received  either (i)
written  notification  thereof  or (ii) if other than in  writing,  notification
thereof,  to SDI's  Knowledge,  within the period of twelve (12) months prior to
the date hereof), involving or relating to, or involving one or more allegations
of, product  liability for injury,  death or damage to persons or property which
are pending  against SDI or any SDI Subsidiary  with respect to products sold or
otherwise  transferred  by SDI or any SDI  Subsidiary.  Neither  SDI nor any SDI
Subsidiary  has  extended  to its  customers  any  written  non-uniform  product
warranties, indemnifications or guarantees.

         (b) The SDI Disclosure  Schedule sets forth a list complete and correct
in  all  material  respects  of  all  insurance  policies  (including,   without
limitation,   policies  of  life,  fire,  theft,  casualty,  product  liability,
workmen's  compensation,  business  interruption,  employee  fidelity  and other
casualty  and  liability  insurance)  and  fidelity  bonds  covering the assets,
business  or  employees  of SDI and each SDI  Subsidiary  (complete  and correct
copies of those  requested by USSC have been made  available  to USSC)  together
with the annual  premiums  payable  with  respect  thereto.  There are no claims
pending under any of said policies or bonds that are material to SDI's  Business
Condition or disputed with  underwriters,  and all premiums due and payable have
been  paid.  There  are no  pending  terminations  with  respect  to any of such
policies  and  bonds and SDI and each SDI  Subsidiary  is in  compliance  in all
material respects with all conditions  contained therein.  All such policies and
bonds  that are  material  to SDI's  Business  Condition  are in full  force and
effect.

         Section 3.23 EMPLOYEE BENEFIT PLANS.

         (a) The SDI Disclosure  Schedule sets forth a complete and correct list
of each  Employee  Pension  Benefit  Plan,  as defined in Section 3(2) of ERISA,
which  (i) is  subject  to any  provision  of  ERISA,  and  (ii) was at any time
maintained,  administered or contributed to by SDI or any SDI  Subsidiaries  and
covered any employee or former employee of SDI or any SDI  Subsidiaries or under
which SDI or any SDI Subsidiaries has any liability. Complete and correct copies
of such plans (and, if applicable,  related trust agreements) and all amendments
thereto and written interpretations thereof have been furnished to USSC together
with the three most recent annual reports (Form 5500  including,  if applicable,
Schedule B thereto)  prepared in connection  with any such plan.  Such plans are
hereinafter referred to collectively as the "Employee Plans."

         (b)  Neither SDI nor any SDI  Subsidiary  contributes  to or  otherwise
participates  in and has never  contributed to or otherwise  participated in any
Employee Plan that is or has been subject to Title IV of ERISA.  Neither SDI nor
any SDI Subsidiary  has engaged in any  "prohibited  transaction"  as defined in
Section 406 of ERISA

                                      -23-


<PAGE>

or Section 4975 of the Code,  nor has a "prohibited  transaction"  occurred with
respect to any Employee Plan or any other  employee  benefit plan or arrangement
contributed  to by SDI or any SDI  Subsidiary  which  is  covered  by Title I of
ERISA. Neither SDI nor any SDI Subsidiary has incurred any liability under Title
IV of ERISA which could become a liability of USSC after the Effective Date.

         (c) Each of the Employee Plans which is intended to be qualified  under
Section 401(a) of the Code (a "Qualified  Plan") is so qualified and has been so
qualified  during the period from its adoption to date, and each trust forming a
part thereof is exempt from tax pursuant to Section 501(a) of the Code. USSC has
been furnished with copies of Internal  Revenue  Service  determination  letters
with respect to each such Employee Plan.  Such  determination  letters cover the
requirements  of all federal  income tax laws,  including  the Tax Reform Act of
1986,  the  Unemployment  Compensation  Amendments  Act of 1992, and the Omnibus
Budget  Reconciliation  Act  of  1993.  Each  of the  Employee  Plans  has  been
maintained in compliance with its terms and with the requirements  prescribed by
any and all statutes,  orders, rules and regulations,  including but not limited
to ERISA and the Code,  which are  applicable to such Employee Plans and nothing
has occurred since the adoption of the Qualified  Plans which resulted or, after
due inquiry,  could result in the  imposition of any penalties on such Qualified
Plans or the sponsors,  fiduciaries  or  administrators  thereof,  including any
actions taken pursuant to this Agreement.

         (d) There is no contract,  agreement,  plan or arrangement covering any
employee or former employee of SDI or any SDI Subsidiary  that,  individually or
collectively,  could give rise to the  payment  of any amount  that would not be
deductible by reason of Section 280G or Section 162(a)(1) of the Code.

         (e) The SDI Disclosure  Schedule sets forth a complete and correct list
of each employment,  severance or other similar contract,  arrangement or policy
and each written plan or binding  arrangement  providing for insurance  coverage
(including any self-insured  arrangements),  workers'  compensation,  disability
benefits, supplemental unemployment benefits, medical benefits, dental benefits,
vacation  benefits,  retirement  benefits or for deferred  compensation,  profit
sharing,  bonuses, stock options, stock appreciation or other forms of incentive
compensation or post-retirement insurance, compensation or benefits which (i) is
not an Employee Plan, (ii) is entered into, maintained or contributed to, as the
case may be, by SDI,  or any SDI  Subsidiary  and (iii)  covers any  employee or
former  employee of SDI, any SDI  Subsidiary or any  predecessor of any of them.
Such contracts,  plans and arrangements are hereinafter referred to collectively
as the  "Benefit  Arrangements."  Each  of the  Benefit  Arrangements  has  been
maintained in material compliance with its terms and comply in


                                      -24-


<PAGE>
all material respects with the requirements prescribed by any and all Laws which
are applicable to such Benefit Arrangements.

         (f) There is no  liability  in  respect of  post-retirement  health and
medical benefits for any retired employees of SDI or any SDI Subsidiary.

         (g) (i) SDI and any SDI Subsidiaries  have made or accrued all payments
required by each Employee Plan and Benefit Arrangement,  any related trusts, any
collective  bargaining  agreement or by Law to be made to each Employee Plan and
Benefit  Arrangement  (including all insurance premiums or intercompany  charges
with respect to each Employee Plan and Benefit  Arrangement) with respect to all
periods through the Effective Date, including, without limitation,  payments for
a pro rata share with respect to any period  including the Effective Date, based
on the  number of days in such  period  to the total  number of days in the plan
year,  and all amounts  properly  accrued to date as liabilities of SDI, and any
SDI  Subsidiaries  under  or with  respect  to  each  Employee  Plan or  Benefit
Arrangement  for the current plan years have been  recorded on the books of SDI,
and any SDI  Subsidiaries;  (ii) there are no  Actions,  arbitrations  or claims
pending  (other than routine  claims for  benefits) or  threatened,  against any
Employee  Plan or Benefit  Arrangement,  its  administrators,  trustees or other
fiduciaries, or against the Shareholder,  SDI or any SDI Subsidiaries or against
the assets of any Employee Plan or Benefit  Arrangement;  (iii) no Employee Plan
providing  retirement  benefits for employees or former employees of SDI and any
SDI  Subsidiary  has been  terminated;  (iv) no Employee  Plan is under audit by
either the Internal  Revenue  Service or the U.S.  Department of Labor;  and (v)
consummation  of the  transactions  contemplated by this Agreement will not give
rise  to any  liability  of  SDI or any  SDI  Subsidiary  for  severance  pay or
termination pay solely by reason of such transactions.

         (h) There has not been,  and prior to or on the Closing Date there will
not be, any amendment to, written interpretation or announcement (whether or not
written)  by SDI or any SDI  Subsidiaries  relating  to, or  change in  employee
participation  or coverage  under,  any Employee  Plans or Benefit  Arrangements
which would increase  materially the expense of maintaining  such Employee Plans
or  Benefit  Arrangements  above the level of the  expense  incurred  in respect
thereof for the period ending on the date hereof.

         Section 3.24 EMPLOYEES.

         (a) The SDI Disclosure  Schedule lists each salaried employee and sales
representative  of SDI and each SDI  Subsidiary,  his or her  current  position,
current salary,  commission and any other compensation  arrangement.  Except for
agreements,  complete and accurate  copies of which have been delivered to USSC,
neither SDI nor any SDI Subsidiary is a party to any consulting or employment


                                      -25-


<PAGE>

agreement  (other than at will  employment  agreements  or  agreements  with the
principal  purpose of providing  for the  confidentiality  of SDI's and each SDI
Subsidiary's  proprietary  information and  prosecution of patent claims),  with
individual consultants or employees (including officers and directors).

         (b) There are no compensation, pension or benefit arrangements, whether
written or oral,  between SDI or any SDI  Subsidiary,  on the one hand,  and any
former  employees of any of them, on the other hand.  Prior to the Closing Date,
USSC  shall  have  received  a list of the names and  addresses  of each  former
employee of SDI and every SDI Subsidiary and each other person currently covered
with respect to any of them under any Benefit Arrangement under the Consolidated
Omnibus Budget Reconciliation Act ("COBRA") together with the expiration date of
all COBRA rights for each such covered person.

         Section 3.25 LABOR MATTERS.  There is no union or collective bargaining
agreement  to  which  SDI or any SDI  Subsidiary  is a  party.  SDI and each SDI
Subsidiary is not engaged in any unfair labor practice.

         Section 3.26 DISTRIBUTORS AND VENDORS.

         (a) SDI has  delivered  to USSC prior to the date of this  Agreement  a
true  and  correct  copy  (if in  SDI's  possession  or  control),  and  the SDI
Disclosure  Schedule  contains a true and correct list of each  distributorship,
agency or similar  agreement  currently in force and effect involving or related
to past,  present  or  future  products  of SDI or to which SDI is a party or by
which it is  otherwise  bound  ("Distributorship  Agreements").  Other  than the
Distributorship  Agreements,  there is no  agreement,  option,  right or binding
understanding  under which any person has an option or other right to enter into
a distribution,  agency or similar agreement with SDI or involving or related to
any of SDI's  past,  present or future  products or to extend the term of any of
the Distributorship Agreements.

         (b) SDI has  heretofore  delivered  to USSC a list true and complete in
all material  respects of the names and  addresses of vendors who have  supplied
SDI with material products, parts, components and subassemblies in the three (3)
years preceding the date hereof (collectively, the "Vendors").

         Section 3.27 TAXES.

         (a) All Tax returns, statements, reports and forms (including estimated
Tax  returns and reports and  information  returns and  reports)  required to be
filed with any Taxing  Authority on or prior to the Closing Date with respect to
any Taxable  period  ending  before the Closing Date, by or on behalf of SDI and
any SDI Subsidiary (collectively, the "SDI Returns"), have been filed when


                                      -26-

<PAGE>

due (including  any  extensions of such due date),  and all amounts shown as due
thereon on or before the Closing Date have been paid on or before such date. The
Interim  Balance Sheet will reflect all actual and  contingent  liabilities  for
Taxes with respect to all periods through the date thereof,  and neither SDI nor
any SDI  Subsidiary  has and none of them will incur any Tax liability in excess
of the amount  reflected on the Interim Balance Sheet with respect to the period
ended the date thereof.

         (b)  Adequate  provision  has been and will be made on SDI's  financial
records for all Tax  liabilities  existing  on or before the  Closing  Date with
respect to any taxable  period ending before the Closing Date.  SDI and each SDI
Subsidiary  has  withheld  and  paid  when  due  to  the  applicable   financial
institution  or Taxing  Authority  all amounts  required to be withheld.  No SDI
federal income tax returns have been examined. SDI has not granted any extension
or waiver of the limitation period applicable to any SDI Returns.

         (c) There is no claim,  audit or Action  now  pending,  against or with
respect to SDI or any SDI  Subsidiary  in respect of any Tax or  assessment.  No
notice of  deficiency  or  similar  document  of any Taxing  Authority  has been
received by SDI or any SDI  Subsidiary.  Neither SDI, any SDI Subsidiary nor any
other  Person on behalf of SDI or any SDI  Subsidiary  has entered into nor will
any of them enter into any  agreement or consent  pursuant to Section  341(f) of
the  Code.  There  are no Liens  for  Taxes  upon the  assets  of SDI or any SDI
Subsidiary  except liens for current Taxes not yet due.  Neither SDI nor any SDI
Subsidiary  is  subject to  withholding  of any  "United  States  real  property
interest" with respect to any  transaction  contemplated  hereby and neither SDI
nor any SDI Subsidiary owns any interest in real property except as disclosed.

         (d) Other than  pursuant  to this  Agreement,  neither  SDI nor any SDI
Subsidiary is a party to or bound by (or will prior to the Closing Date become a
party to or bound by) any Tax sharing agreement.

         (e) It is  understood,  agreed and  intended  by the  parties  that the
Merger  will be  treated  for U.S.  Federal  income  tax  purposes  as a taxable
purchase of the Shares by USSC, pursuant to the principles enunciated in Revenue
Ruling 73-427, and the parties agree to take no positions, inconsistent with the
treatment  of the Merger as a taxable  stock  purchase by USSC of the Shares for
Federal income tax purposes.

         Section 3.28 PERMITS AND  LICENSES.  SDI has delivered to USSC prior to
the date of this  Agreement  a true and  correct  copy,  and the SDI  Disclosure
Schedule contains a list of (i) each pending application or registration for FDA
Approval with respect to the Two Products and each FDA Approval held by SDI with
respect to the Two Products to import, export and sell the Two Products and any

                                      -27-


<PAGE>

similar  applications or registrations  with any foreign  Governmental  Body and
(ii) the most recent report by or on behalf of the FDA or any other Governmental
Body involving or relating to any FDA, OSHA or EPA related  facility  inspection
of SDI  facilities.  SDI and  each  SDI  Subsidiary  possess  such  Governmental
Approvals from all Governmental Bodies including,  without  limitation,  all FDA
Approvals,  that are material to (aa) the  operation of their  businesses in the
manner as the same are  currently  conducted,  and (bb)  operate or occupy their
respective  properties.  There have been no product  recalls,  field  corrective
activity,  medical  device  reports or  warning  letters by the FDA or any other
Governmental  Body  relating to the Two Products,  and (iii) to SDI's  Knowledge
there is no  administrative  action  pending for the  revocation of any such FDA
Approval.

         Section 3.29 MINUTE BOOKS.  The minute book of SDI delivered to USSC at
Closing,  is, in all material  respects,  a complete and accurate  record of all
meetings and  accurately  reflects all other  material  corporate  action of the
shareholders and board of directors of SDI.

         Section 3.30 BROKERS.  Except for Eckvest Equity, Inc., neither SDI nor
any SDI  Subsidiary nor either of the  Shareholders  has employed any investment
banker,  broker or finder which might be entitled to a fee or other remuneration
upon consummation of the transactions contemplated hereby.

                                   ARTICLE IV
               REPRESENTATIONS AND WARRANTIES OF USSC and USSC SUB

         USSC and USSC Transitory Sub hereby jointly and severally represent and
warrant  to each  of SDI  and  the  Shareholders,  except  as  disclosed  in the
Disclosure  Schedule  attached  hereto (the "USSC  Disclosure  Schedule")  as an
exception  to a  representation  and warranty in this  Agreement  (any matter or
information  described  in the USSC  Disclosure  Schedule  with  respect  to any
representation  or  warranty in any Section  shall be deemed an  exception  with
respect to all representations and warranties in this Article IV) as follows:

         Section  4.01  ORGANIZATION;  AUTHORITY  AND  APPROVAL.  USSC  and USSC
Transitory SUB are  corporations  duly organized,  validly  existing and in good
standing under the laws of the State of Delaware.  USSC and USSC  Transitory Sub
each have the corporate power to execute, deliver and perform this Agreement and
to consummate the transactions  contemplated hereby. This Agreement  constitutes
the valid and binding  agreement of USSC and USSC  Transitory  Sub,  enforceable
against  each of them in  accordance  with  its  terms  subject  to  bankruptcy,
insolvency and other similar laws affecting  creditors'  rights generally and to
general  equitable  principles  including  the  discretion  of a court  to grant
equitable relief.


                                      -28-

<PAGE>

         Section 4.02 NO CONFLICT.  The execution,  delivery and  performance of
this Agreement by USSC and USSC Transitory Sub does not, and the consummation by
USSC and USSC Transitory Sub of the transactions  contemplated  hereby will not,
(i) violate or conflict with their  respective  certificates of incorporation or
by-laws,  (ii) assuming satisfaction of the matters referred to in the following
clause (iii) of this Section  4.02,  violate or conflict  with any Law currently
applicable to USSC or USSC  Transitory  Sub or any agreement or  instrument,  or
currently applicable award, judgment or decree, to which USSC or USSC Transitory
Sub is a party or by which either is bound,  or (iii) require any filing by USSC
or USSC Transitory Sub with, or authorization, approval, consent or other action
by any Governmental Body other than in accordance with the HSR Act, (iv) violate
or conflict  with,  result in a breach of,  constitute a default under  (whether
with  notice  or the  lapse  of  time or  both),  or  give  rise  to a right  of
termination  or to  accelerate  or permit the  acceleration  of the  performance
required by, any indenture,  mortgage,  Lien, loan  arrangement,  lease or other
agreement or  instrument to which USSC or USSC  Transitory  Sub is a party or by
which USSC or USSC Transitory Sub or any of their  respective  assets are bound;
or (v)  result  in the  creation  of any Lien  upon the  assets  of USSC or USSC
Transitory  Sub under any such  indenture,  mortgage,  Lien,  loan  arrangement,
lease,  agreement or  instrument,  which  violation,  conflict,  failure to take
action  or obtain  consent,  approval  or  authorization,  breach,  termination,
acceleration,  default or Lien  specified in the foregoing  clauses (ii) through
(v) could have a Material Adverse Effect on USSC's Business Condition.

         Section 4.03 BROKERS. Neither USSC nor USSC Transitory Sub has employed
any  investment  banker,  broker or finder  which  might be entitled to a fee or
other remuneration upon consummation of the transactions contemplated hereby.

         Section  4.04  SECURITIES   REPRESENTATION.   USSC  is  an  "Accredited
Investor" as defined in Rule 501 promulgated  pursuant to the Securities Act and
is capable of evaluating  the risks and merits of the  acquisition of the Shares
and the  Surviving  Corporation  Shares  and is  acquiring  the  Shares  and the
Surviving  Corporation  Shares for  investment  and not with a view or intent to
distribute or resell them. The foregoing  representation  shall not be deemed to
limit any of SDI's or the Shareholders'  representations or warranties set forth
in this Agreement.

                                    ARTICLE V
                      COVENANTS OF SDI AND THE SHAREHOLDERS

         Section 5.01 CONDUCT OF BUSINESS.

         (a) Except (i) as may be necessary or  appropriate  to  consummate  the
transactions contemplated by this Agreement from the


                                      -29-


<PAGE>

date hereof until and including  the Closing Date,  (ii) to conduct its business
in the ordinary course,  (iii) as disclosed in the SDI Disclosure  Schedule,  or
(iv) as consented to (which consent shall not be unreasonably withheld) by USSC,
SDI will not, and will cause each of SDI's Subsidiaries not to:

         (1)  commence  any  litigation  or other  proceeding  in which SDI is a
party;

         (2) enter into or amend in any  respect  any plan,  contract,  license,
lease  or  agreement  of a  type  required  to be  disclosed  pursuant  to  this
Agreement;

         (3) issue any of its capital stock,  declare or pay any dividend on, or
make any other  distribution  with respect to, its capital stock, or repurchase,
redeem or otherwise acquire any of its capital stock;

         (4) merge or  consolidate  with any other  corporation  or acquire  the
business of any Person;

         (5) other than an amendment to the By-laws relating to  indemnification
described  in Section  3.18 of the SDI  Disclosure  Schedule,  make any material
change in its Restated Certificate of Incorporation or Bylaws;

         (6) sell,  lease or  otherwise  dispose  of any  assets,  inventory  or
property relating to the Intellectual Property technology;

         (7) incur, or perform,  pay or otherwise  discharge,  any obligation or
liability (absolute or contingent);

         (8) hire any employee or pay any fees to any director or officer;

         (9) take any other  action  which  would  result in a Material  Adverse
Effect on SDI's Business Condition including,  without limitation,  a Bankruptcy
Event;

         (10) conduct any clinical trials,  protocols or tests,  animal or other
pre clinical trials,  protocols or tests or any other type of testing  involving
any  Fusion  Cage  prototype,  PROVIDED  THAT (a) SDI  shall  have the  right to
continue existing testing and in-house research and development, and (b) SDI may
conduct new tests  which USSC may permit or agree to fund in a separate  written
agreement; or

         (11) commit itself to do any of the foregoing.

Notwithstanding  anything  set forth above in Section  5.01 or otherwise in this
Agreement,  neither SDI nor any SDI  Subsidiary  shall prior to the Closing Date
(i) enter into any financing, or


                                      -30-

<PAGE>
                        [CONFIDENTIAL MATERIAL OMITTED.]

commit itself to enter into any  financing,  with any Person other than with the
Shareholders  and their  Affiliates,  except as consented to by USSC in its sole
and absolute  discretion,  (ii) incur any liability  for borrowed  moneys to any
Shareholder or any Affiliate of any  Shareholder  which shall not be canceled on
the Closing Date without  cost or expense to SDI, any SDI  Subsidiary,  USSC and
USSC Transitory Sub; (iii) other than in the ordinary course of business, effect
any other  transaction with any Shareholder or any Affiliate of any Shareholder,
(iv) make any payment to the Shareholders,  directly or indirectly,  or (v) make
any payment to Eckvest Equities, Inc. with respect to any fees or expenses.

         Section 5.02. FINANCIAL  STATEMENTS.  Within fifteen (15) Business Days
after the last day of each  month  during the  period  commencing  with the date
hereof and ending on the last day of the month  preceding  the Closing Date (but
not later than the Closing Date), SDI shall deliver to USSC monthly an unaudited
consolidated balance sheet of SDI, the related consolidated statements of income
and changes in shareholders'  equity and cash flows for each monthly period from
October 1, 1995,  through the month end immediately  preceding the Closing Date,
in the form as previously prepared by SDI for its own internal use.

         Section 5.03 [CONFIDENTIAL MATERIAL OMMITTED.]

         Section  5.04  ACCESS.  SDI will (a)  afford  promptly  to USSC and its
authorized  representatives  full access from the date hereof  until the Closing
Date,  during normal  business  hours,  to its  properties,  books,  records and
auditors  (and  their work  papers),  (b) cause  each SDI  Subsidiary  to afford
promptly to USSC and its  authorized  representatives  full access from the date
hereof  until the  Closing  Date,  during  normal  business  hours,  to each SDI
Subsidiary's respective properties,  books, records and auditors (and their work
papers),  and (c) furnish to USSC such  additional  financial and data and other
information  relating to SDI and any SDI Subsidiary as it may reasonably request
that SDI or any SDI Subsidiary has in its possession.

         Section  5.05 NO LIENS.  To the Closing  Date,  except in the  ordinary
course of  business,  and other than with  respect to the Two  Products  and any
Intellectual  Property  involving  or related  thereto,  neither SDI nor any SDI
Subsidiary will encumber or grant or permit to be taken any Lien on any asset or
property of SDI or any SDI Subsidiary or enter into any  transaction or make any
commitment to do so.

         Section 5.06 CONSENTS;  REGULATORY  APPROVAL.  To the Closing Date, SDI
will take all such commercially reasonable actions as may be necessary to obtain
all approvals or consents from third parties


                                      -31-
<PAGE>

or regulatory or governmental agencies necessary or advisable in order to permit
the  consummation of the  transactions  contemplated  in this Agreement  without
impairing the validity or  effectiveness of any lease or other contract to which
SDI or any SDI Subsidiary is a party or by which any of their respective  assets
are bound.  Without  limiting the  foregoing,  SDI will  cooperate  with USSC in
connection with any filing required by the HSR Act.

         Section 5.07 COMMERCIALLY REASONABLE EFFORTS. SDI will use commercially
reasonable  efforts  to cause the  conditions  set forth in  Section  7.01 to be
satisfied as soon as practicable after the date hereof.

         Section  5.08  CONFIDENTIALITY.  The  Shareholders  will  not  use,  or
disclose to third parties,  any  confidential  information  concerning  SDI. The
Shareholders  will hold, and cause SDI to hold, all information  provided to SDI
or the  Shareholders  by or on  behalf  of USSC  (and  any  information  derived
therefrom,  or reflecting any such information,  prepared by or on behalf of the
Shareholders)  relating to USSC in  confidence  and will not  disclose  any such
information  other  than to  directors,  officers,  employees  and agents of the
Shareholders or SDI who need to know such  information.  Upon any termination of
this Agreement,  the  Shareholders  shall promptly return and shall cause SDI to
promptly  return  to USSC  all  such  information  and  will  destroy  any  such
information prepared by any of them or on their behalf,  including any copies of
such  information.  This Section 5.08 shall not apply to: (i) information now or
hereafter in the public domain through no fault of SDI or the Shareholders, (ii)
information  which the  Shareholders or any Affiliate of the  Shareholders  knew
(and was not restricted  from  disclosing or using) and was in documentary  form
before USSC first  contacted  the  Shareholders  or SDI in  connection  with the
transactions contemplated herein, (iii) information obtained from a source other
than  USSC,  provided  such  source  was  not  at the  time  it  furnished  such
information bound by confidentiality obligations for the benefit of USSC and had
authorization  to disclose same, and (iv)  compliance with any applicable Law by
the  Shareholders,  SDI or any SDI  Subsidiary,  providing  that  USSC is  given
reasonable time and opportunity to contest such disclosure.

         Section 5.09 SHAREHOLDERS' AGREEMENTS. On or prior to the Closing Date,
any shareholder agreement to which SDI, any SDI Subsidiary or either Shareholder
is a party  governing the voting or  acquisition of any SDI Capital Stock or any
SDI Subsidiary  Securities or the making of corporate  policy  decisions will be
terminated and become null and void.

         Section 5.10 INCONSISTENT ACTIVITIES.

         Unless and until this  Agreement  has been  terminated  pursuant to the
terms hereof,  (i) the Shareholders will not entertain any Acquisition  Proposal
and will not dispose of or agree to dispose of


                                      -32-


<PAGE>

any of the  Shares  and  (ii)  each of SDI and the  Shareholders  will  not (aa)
directly or indirectly take any action to seek,  initiate or encourage any offer
from, or negotiate or enter into any agreement or understanding with, any Person
to acquire  all or any portion of the  business or any SDI Capital  Stock or any
right,  title or  interest  in the Two  Products  whether by  merger,  purchase,
purchase  of assets,  license or other  similar  transaction,  or (bb)  disclose
(other than to USSC or its agents) any information not customarily  disclosed in
the ordinary course of business or legally  required to be disclosed  concerning
the business, properties or assets of SDI.

         Section 5.11 STOCK TRANSFER TAX;  TRANSFER TAXES.  Prior to the Closing
Date,  SDI shall  cause each Person to pay, or  reimburse  SDI for,  any and all
stock  transfer  taxes and any other transfer taxes imposed upon SDI as a result
of  the  transactions  contemplated  hereby  and  due  in  connection  with  the
transactions contemplated by this Agreement.

         Section 5.12 ADVICE OF CHANGES. Between the date hereof and the Closing
Date, SDI and the Shareholders,  on the one hand, and USSC, on the other hand (a
"Notifying  Party")  will  notify  the  other  parties  to this  Agreement  (the
"Notified  Party")  promptly in writing of the  occurrence  of any  condition or
event that would cause any  representation  or warranty of the  Notifying  Party
contained  herein to be untrue in any  material  respect at any time between the
date hereof and the Closing  Date.  The  Notified  Party shall have the right to
terminate  this  Agreement to the extent  permitted  under  Section 8.01. In the
event  that  the   transactions   contemplated   hereby  are   consummated   the
representations  and warranties of the Notifying Party contained  herein and the
Notifying  Party's  Disclosure  Schedule shall be deemed to have been amended by
such notification as of the date of the Notifying Party's notice.

         Section 5.13  PROFESSIONAL  FEES.  Without  limiting the  generality of
Section  12.02,  the  Shareholders  shall pay and discharge all fees,  costs and
expenses for legal,  accounting and financial  services  rendered by all Persons
(A) to the Shareholders, and (B) to SDI (i) in the preparation,  negotiation and
consummation  of this Agreement,  any other agreement to be executed  between or
among  USSC,  USSC  Transitory  Sub,  SDI and the  Shareholders  relating to the
transactions  contemplated  hereby  and  (ii)  in  the  preparation,   updating,
completion or finalization of their respective corporate books and records (i.e.
"housekeeping" work) so that such books and records would be reasonably complete
and up to  date  during  the  past  six (6)  months  to  enable  SDI and the SDI
Subsidiaries  to commence or proceed with  preparation  and  negotiation of this
Agreement.

         Section 5.14  DISSOLUTION  OF  SUBSIDIARIES.  SDI shall use  reasonable
efforts to dissolve, prior to the Closing Date, Surgical


                                      -33-


<PAGE>

Dynamics  Ltd.,  Inc., a United States Virgin Islands  corporation  and Surgical
Dynamics Puerto Rico, Inc., a Delaware corporation.

         Section 5.15 TAX RETURNS.
Prior to the Closing,  the  Shareholders  shall engage Grant Thornton  L.L.P. to
prepare  promptly  following  the Closing all income Tax returns  required to be
filed with any  Taxing  Authority  after the  Closing  Date with  respect to any
Taxable  period  ending on or prior to the Closing  Date, by or on behalf of SDI
and any SDI  Subsidiary  (collectively,  the "SDI Post  Closing  Returns").  The
Shareholders  shall cause the SDI Post Closing Returns to be signed on behalf of
SDI and the SDI  Subsidiaries  by Henry Klyce (or if he is unable to act for any
reason,  another individual designated by the Shareholders),  PROVIDED that USSC
shall have appointed  Henry Klyce or such other  individual an officer of SDI or
the applicable SDI  Subsidiary for this purpose and,  thereafter,  SDI will file
the SDI Post Closing Returns;  provided further and on condition that USSC shall
cause SDI to provide  reasonable  cooperation to the  Shareholders in connection
therewith.  To the extent that no accrual,  reserve or other  provision has been
made for the Taxes due  thereon  on SDI's or such SDI's  Subsidiary's  financial
records as of the Closing Date or on the Interim  Balance Sheet,  the deficiency
shall  be  paid  by the  Shareholders  and  the  Shareholders  hereby  agree  to
indemnify,  defend  and hold USSC  harmless  from and  against  any and all such
deficiencies.  USSC, or at its discretion,  SDI shall reimburse the Shareholders
for the amount of Grant  Thornton  L.L.P.'s fees and expenses to prepare the SDI
Post Closing  Returns up to an aggregate of Twenty Thousand  Dollars  ($20,000),
provided (i) the SDI Post  Closing  Returns  shall have been  signed,  as herein
provided, and (ii) USSC shall have been provided with appropriate  documentation
concerning  such  fees  and  expenses.  Otherwise,  the  Shareholders  shall  be
responsible for such fees and expenses.

                                   ARTICLE VI
                                COVENANTS OF USSC

         USSC agrees as follows:

         Section 6.01  CONFIDENTIALITY.  USSC and USSC  Transitory Sub will each
hold  in  confidence  all  information  provided  to it by or on  behalf  of the
Shareholders or SDI relating to SDI or any SDI Subsidiaries (and any information
derived therefrom, or reflecting any such information,  prepared by or on behalf
of USSC or USSC Transitory Sub) in confidence and will not (a) disclose any such
information other than to directors,  officers,  employees and agents of USSC or
USSC  Transitory Sub who need to know such  information  for the purposes of the
transactions  contemplated  by this Agreement and as required in connection with
making any regulatory application or complying with any other applicable Law; or
(b) use such information for any purpose other than to evaluate the transactions
contemplated by this Agreement. Upon any termination of this Agreement, USSC and
USSC Transitory Sub will promptly

                                      -34-


<PAGE>
                        [CONFIDENTIAL MATERIAL OMITTED.]

return to SDI and the  Shareholders  all such  information  and will destroy any
such  information  prepared  by USSC or USSC  Transitory  Sub or on its  behalf,
including any copies of such information.  This Section 6.01 shall not apply to:
(i)  information  now or hereafter in the public domain through no fault of USSC
or USSC Transitory Sub; (ii) information which USSC and USSC Transitory Sub knew
(and was not restricted  from  disclosing or using) and was in documentary  form
before USSC or USSC Transitory Sub first contacted SDI or the  Shareholders,  or
their  representatives in connection with the transactions  contemplated herein;
(iii)  information  obtained from a source other than SDI or the Shareholders or
their  accountants,  provided  that such source was not at the time it furnished
such information bound by confidentiality  obligations for the benefit of SDI or
the Shareholders in respect thereof and had  authorization to disclose same; and
(iv)  compliance  with any applicable Law or the regulation or rule of any stock
exchange, by USSC, USSC Transitory Sub or any of their Affiliates, provided that
the  Shareholders  are given  reasonable  time and  opportunity  to contest such
disclosure.

         Section   6.02   COMMERCIALLY   REASONABLE   EFFORTS.   USSC  will  use
commercially  reasonable  efforts to cause the  conditions  set forth in Section
7.02 to be satisfied as soon as practicable after the date hereof.

         Section 6.03 [CONFIDENTIAL MATERIAL OMMITTED.]

         Section 6.04  CONSENTS;  REGULATORY  APPROVAL.  USSC will take all such
commercially  reasonable  actions as may be necessary to obtain all approvals or
consents from third parties or regulatory or governmental  agencies necessary or
advisable in order to permit the consummation of the  transactions  contemplated
in this Agreement.  Without limiting the foregoing, USSC will cooperate with SDI
or either  Shareholder in connection with the preparation of any filing required
by the HSR Act.

         Section 6.05  SECURITIES  COVENANT.  USSC and USSC  Transitory Sub each
hereby  confirms its  understanding  and agreement that the Shares and Surviving
Corporation  Shares  have not  been,  nor will  they be,  registered  under  the
Securities Act or any state  securities  law. USSC and USSC  Transitory Sub each
further  acknowledges  that it has been  afforded  the  opportunity  to ask such
questions  as it has  deemed  necessary  of, and to receive  answers  from,  the
Shareholders concerning the Shares and Surviving Corporation Shares and SDI. The
foregoing shall not be deemed to limit the representations and warranties of SDI
and the Shareholders in this Agreement.

         Section 6.06 OTHER POST-CLOSING ACTIONS. USSC shall not cause or permit
(a) any distribution on the Closing Date or for a


                                      -35-

<PAGE>
                        [CONFIDENTIAL MATERIAL OMITTED.]

period of two (2) years  after the  Closing by the  Surviving  Corporation  with
respect to the stock of the Surviving Corporation, including without limitation,
a dividend distribution and a distribution in partial or complete liquidation of
the Surviving  Corporation or (b) the filing of an election  pursuant to Section
338 of the Code with respect to the Merger.

         Section 6.07 [CONFIDENTIAL MATERIAL OMITTED.]

                                   ARTICLE VII
                              CONDITIONS TO CLOSING

         Section 7.01  CONDITIONS TO THE OBLIGATIONS OF USSC. The obligations of
USSC and USSC Transitory Sub to proceed with the Closing contemplated hereby are
subject  to the  satisfaction  at or  prior  to the  Closing  Date of all of the
following  conditions in all material respects,  any one or more of which may be
waived, in whole or in part, by USSC:

         (a)  COMPLIANCE.  SDI and the  Shareholders  shall have complied in all
material  respects  with  each of  their  respective  covenants  and  agreements
contained  herein  and,  except as  affected  by any action  contemplated  by or
permitted under this  Agreement,  or as consented to in writing by USSC, each of
the representations and warranties of the Shareholders contained herein shall be
true and correct in all  material  respects at and as of the Closing  Date as if
made as of the Closing Date,  except (i) those  representations  and  warranties
that  relate  to  a  date  prior  to  the  Closing   Date  or  (ii)  where  such
non-compliance  or  failure  to be true and  correct  does  not have a  Material
Adverse Effect on SDI's Business Condition.

         (b) OFFICER'S CERTIFICATE.  USSC shall have received a certificate from
the President of SDI that, to his knowledge and belief, the conditions set forth
in Section 7.01 have been fulfilled and accomplished.

         (c) LEGAL  OPINIONS.  USSC  shall  have  received  opinions  of Greene,
Radovsky,  Maloney & Share, counsel to SDI; Goodman Phillips & Vineberg, counsel
to E-Z-SUB and E-Z-M and Bogatin P. L. C.,  counsel to CalMed  dated the Closing
Date, respectively, substantially in the form(s) of EXHIBITS C, D AND E attached
hereto.

         (d) CONSENTS,  APPROVALS,  ETC. OBTAINED.  SDI shall have given any and
all required  notices of the  transactions  contemplated by this Agreement,  and
shall have obtained any and all written  consents  required for the transactions
contemplated by this Agreement, pursuant to its Certificate of Incorporation and
Bylaws


                                      -36-


<PAGE>
and pursuant to each material contract, loan, or agreement, plan, policy, lease,
permit,  license and other  document or  instrument  specified in any Exhibit or
Schedule  hereto as requiring  such notice or consent,  except (i) to the extent
the consent or approval is covered by Section 7.03, or (ii) where the failure to
do so would not have a Material Adverse Effect on SDI's Business  Condition.  No
terminations or defaults shall have occurred, by reason of this Agreement or the
transactions  contemplated  hereby,  pursuant to any  material  contract,  loan,
agreement,  plan,  policy,  lease,  permit,  license  or any other  document  or
instrument  specified in any Exhibit or Schedule attached hereto that would have
a Material Adverse Effect on SDI's Business Condition.

         (e)  PROFESSIONALS.  On or  prior to the  Closing  Date,  all  existing
agreements  between  SDI and any SDI  Subsidiary,  on the one hand,  and  Green,
Radovsky,  Malone & Share  and  Goodman  Phillips  &  Vineberg  shall  have been
terminated.  The Shareholders shall provide to USSC on the Closing Date evidence
of same  (reasonably  satisfactory  to  USSC),  including,  without  limitation,
invoices from all  Professionals  as of the month end immediately  preceding the
Closing  Date to the  extent  SDI can  obtain  them with  reasonable  commercial
efforts,  and releases  signed by Greene,  Radovsky,  Malone & Share and Goodman
Phillips & Vineberg.

         (f) INTERIM BALANCE SHEET AND OTHER DOCUMENTS. USSC shall have received
(i) the Interim Balance Sheet with a certificate from the President of SDI that,
to his knowledge and belief and except for footnote  disclosures  and period end
adjustments,  the Interim  Balance  Sheet was prepared in  accordance  with GAAP
consistently applied and fairly presents the financial position of SDI as of the
date thereof, and (ii) SDI's corporate minute and stock record books.

         (g) CHANGE IN  CONDITION.  There  shall have been no  Material  Adverse
Effect on SDI's Business Condition since the date of this Agreement.

         (h) ECKVEST  RELEASE.  USSC shall have received a written  release from
Eckvest  Equity,  Inc.  with  respect to any fees or expenses  due from SDI as a
result of the  transactions  contemplated  hereunder,  or any other claim of any
kind or amount.

         (i)  RESIGNATIONS.  SDI shall have  delivered to USSC the  resignations
(including  a waiver  of any claim as a  director  for  directors  fees or other
claims  against SDI)  effective  as of the Closing  Date,  of each  director and
officer of SDI.

         Section 7.02  CONDITIONS TO THE  OBLIGATIONS OF THE  SHAREHOLDERS.  The
obligations  of SDI  and the  Shareholders  to  proceed  with  the  transactions
contemplated  hereby are subject to the  satisfaction at or prior to the Closing
Date of all of the following conditions in all material respects any one or more
of


                                      -37-


<PAGE>

which may be waived, in whole or in part, by SDI and the Shareholders:

         (a)  COMPLIANCE.  USSC and USSC Transitory Sub shall each have complied
in all material  respects with each of its covenants  and  agreements  contained
herein  (including,   without  limitation,   the  payment  provided  in  Section
2.03(b)(iv)) and, except as affected by any action  contemplated by or permitted
under this Agreement, or as consented to in writing by the Shareholders, each of
the  representations and warranties of USSC and USSC Transitory Sub contained in
Article IV hereof shall be true and correct in all  material  respects at and as
of the  Closing  Date as if made at and as of the  Closing  Date,  except  those
representations and warranties that relate to a date prior to the Closing Date.

         (b)  OFFICER'S  CERTIFICATE.  The  Shareholders  shall have  received a
certificate,  dated the Closing Date,  signed by a Senior Vice President of USSC
certifying that, to the best of his knowledge and belief,  all of the conditions
set forth in Section 7.02 have been fulfilled and accomplished.

         (c) LEGAL OPINION.  The Shareholders  shall have received an opinion of
Thomas R. Bremer, Esq., Senior Vice President and General Counsel to USSC, dated
the Closing Date, substantially in the form of EXHIBIT F attached hereto.

         (d) CONSENTS,  APPROVALS,  ETC. OBTAINED.  USSC and USSC Transitory Sub
shall have given any and all required notices of the  transactions  contemplated
by this Agreement, and shall have obtained any and all written consents required
for the transactions contemplated by this Agreement, pursuant to its certificate
of incorporation  and by-laws and pursuant to each material  contract,  loan, or
agreement, plan, policy, lease, permit, license and other document or instrument
specified in any Exhibit or Schedule  hereto as requiring such notice or consent
except (i) to the extent the consent or approval is covered by Section  7.03, or
(ii)  where the  failure to do so would not have a  Material  Adverse  Effect on
USSC's Business Condition.  No terminations or defaults shall have occurred,  by
reason of this Agreement or the transactions  contemplated  hereby,  pursuant to
any material contract, loan, agreement,  plan, policy, lease, permit, license or
any other document or instrument  specified in any Exhibit or Schedule  attached
hereto.

         Section 7.03  CONDITIONS TO EACH PARTY'S  OBLIGATIONS.  The  respective
obligations  of each  party to  proceed  with the  Closing  are  subject  to the
condition that on or prior to the Closing Date (a) any Governmental  Body having
jurisdiction, to the extent required by Law, shall have consented to or approved
the  consummation  of the  transactions  contemplated  by this Agreement and the
applicable  period of time necessary  under the HSR Act before such  transaction
can be consummated shall have expired, and (b)


                                      -38-


<PAGE>
there shall not be in effect (i) any Action,  judgment,  decree or order  issued
by, or pending  before any  Federal or state court or  Governmental  Body having
jurisdiction or (ii) any Law,  enacted or promulgated by any  Governmental  Body
having jurisdiction, that in either case of (i) or (ii) restrains, prohibits the
consummation  of the  transactions  contemplated by this Agreement or makes such
consummation illegal, provided, that, any party hereto may contest or appeal any
such judgment,  decree,  order or the  applicability of any such Law, at its own
expense, and upon notice from such party to the other parties of such contest or
appeal, the Outside Date shall be automatically  extended from day-to-day (for a
period  not to exceed  sixty  (60)  days)  until the final  disposition  of such
contest or appeal.

                                  ARTICLE VIII
                                   TERMINATION

         Section 8.01 GROUNDS FOR TERMINATION.  This Agreement may be terminated
at any time prior to the Closing Date:

              (i) by the mutual written agreement of all of the parties hereto;

              (ii)  by USSC if a  Material  Adverse  Effect  on  SDI's  Business
Condition has occurred.

              (iii) by any party,  if the  conditions  set forth in Section 7.03
are not  satisfied  on or before the Outside  Date or as extended in  accordance
with such Section;

              (iv) by USSC if the  conditions  in Section 7.01 are not satisfied
or waived on or before the Scheduled Closing Date;

              (v) by the Shareholders, if the conditions in Section 7.02 are not
satisfied or waived on or before the Scheduled Closing Date;

Termination  of this  Agreement  pursuant to any of the  foregoing  clauses (ii)
through (v) shall be effective  upon notice of such  termination  from the party
terminating this Agreement to each of the other parties.

         Section 8.02 TERMINATION  CIRCUMSTANCES.  If any party becomes aware of
facts or circumstances that would entitle such party to terminate this Agreement
pursuant to Section 8.01,  such party shall give immediate  notice of such facts
or circumstances to the other party or parties,  who,  notwithstanding any other
provision in this Agreement (including, without limitation, the requirement that
the Closing occur on or before the Outside  Date),  shall have ten (10) Business
Days in which to rectify such facts or  circumstances  and the  notifying  party
shall not be entitled to terminate this


                                      -39-


<PAGE>
                        [CONFIDENTIAL MATERIAL OMITTED.]

Agreement,  if such facts or circumstances  are so rectified.  In the event that
such notice is given less than ten (10) Business Days prior to the Outside Date,
the Outside  Date shall be extended  to a date which is fourteen  (14)  Business
Days after the date of such notice.

         Section 8.03 EFFECT OF TERMINATION

              (a) If this  Agreement is  terminated as permitted by Section 8.01
(a "Termination"), except as provided in Section 2.05, such Termination shall be
without  liability  of  any  party  (or  any  shareholders,  director,  officer,
employee, agent, consultant or representative of any party) to the other parties
to  this  Agreement;  PROVIDED  THAT  if  such  Termination  shall  result  from
deliberate and intentional  failure of a party to (i) fulfill a condition to the
performance  of the  obligations  of one of the other parties or (ii) to perform
any  covenants  of such party  under this  Agreement,  such party shall be fully
liable for any and all costs and  expenses  sustained  or  incurred by the other
party or  parties  as a result  of such  failure.  For  greater  certainty,  the
inaccuracy of any  representation or breach of any warranty by a party shall not
result in such party being liable for any damages,  costs or expenses  sustained
or incurred by any other parties as a result thereof.

              (b)  Notwithstanding  any other  provision  hereof,  if there is a
Termination  neither SDI, nor any Affiliate of SDI, nor either  Shareholder  nor
any  such  Shareholder's  Affiliate  shall  have any  liability  to USSC or USSC
Transitory Sub and neither USSC  Transitory Sub nor USSC shall pursue any remedy
against SDI, such  Shareholder or any Affiliate  thereof,  for any breach of any
representations,  warranties or covenants, or the failure to perform a condition
by or of SDI or any Shareholder  hereunder  except (i) to the extent provided in
this Section (a) of this Section 8.03 or (ii) any breach of Section 5.08 hereof.
Nothing  hereinabove  in this  Section  8.03 is intended to limit USSC's or USSC
Transitory Sub's rights under this Agreement to the return of the Deposit.

                                   ARTICLE IX
               EXTENT AND SURVIVAL OF REPRESENTATIONS, WARRANTIES,
                    COVENANTS AND AGREEMENTS; INDEMNIFICATION

         Section 9.01 [CONFIDENTIAL MATERIAL OMMITTED.]

         Section 9.02 INDEMNIFICATIONS.

         (a) [CONFIDENTIAL MATERIAL OMMITTED.]


                                      -40-


<PAGE>

                        [CONFIDENTIAL MATERIAL OMITTED.]

         (b) [CONFIDENTIAL MATERIAL OMMITTED.]

         (c) Each party shall give prompt  notice (the  "Indemnified  Party") to
the other  party(ies)  from whom  indemnification  is sought (the  "Indemnifying
Parties") of the assertion of any USSC Claim or SDI Claim  (either,  a "Claim"),
as the case may be,  and if the  Claim  arises  out of the  commencement  of any
Action against the Indemnified  Party, of which the Indemnified Party has actual
notice  of  and  will  give  such   information  with  respect  thereto  as  the
Indemnifying   Parties  may  reasonably   request;   HOWEVER,   the  failure  of
Indemnifying  Parties to give  notice as required  herein  shall not relieve the
Indemnifying Parties of their  indemnification  obligations hereunder unless and
to the extent the  Indemnifying  Parties are  prejudiced by such failure to give
prompt notice. The Indemnified Parties may, at their own expense, participate in
the defense of any such Claim or Action,  PROVIDED THAT the Indemnifying Parties
shall have the right to conduct  the  defense of and  settle  such  Action  with
counsel  reasonably  satisfactory to the Indemnified  Party.  All of the parties
hereto shall cooperate in the defense or prosecution  thereof.  No investigation
by or on  behalf  of USSC at or prior to the  Closing  Date  shall  relieve  the
Shareholders  of any  liability  hereunder,  except to the  extent  provided  in
Section 9.02(f).

         (d)  The  Shareholders  shall  have  no  right  of  indemnification  or
contribution against SDI with respect to their indemnification obligations under
this Section 9.02 after the Closing Date.

         (e) The  provisions  of this  Article  IX  shall  provide  the sole and
exclusive recourse and remedy of the USSC Indemnitees with respect to any claims
or rights against either or both of the Shareholders  and/or SDI with respect to
any breach by either  Shareholder  or SDI of any provision of this  Agreement or
any untrue  representation  or warranty and the USSC  Indemnitees  shall have no
claims or rights of any kind with respect to any breach of any provision of this
Agreement  or any untrue  representation  or warranty,  except as expressly  set
forth in this Article IX.

         (f) If on or before the  Closing  Date,  USSC has actual  knowledge  of
facts  or  circumstances  constituting  a  breach  by  either  or  both  of  the
Shareholders and/or SDI of any of the representations,  warranties, covenants or
agreements made or to be performed by either or both of the Shareholders  and/or
SDI,  but  USSC   determines   nevertheless   to  consummate  the   transactions
contemplated  by  this  Agreement  and  the  Closing  occurs,   neither  of  the
Shareholders shall have any indemnification  obligation pursuant to this Section
9.02 or otherwise  with respect to any matter  resulting from or related to such
facts or circumstances.


                                      -41-


<PAGE>

         (g) Neither of the Shareholders nor USSC shall have any indemnification
obligation  pursuant to this Section 9.02 or otherwise  with respect to a breach
of a representation  or warranty if the Damages result from an order,  directive
or other action by a Governmental Body and USSC and/or SDI brought the matter to
the attention of the Governmental Body.

         (h)  Notwithstanding any breach or default by any of the parties of any
of  their  respective  representations,   warranties,  covenants  or  agreements
hereunder,  if  the  transactions   contemplated  by  this  Agreement  shall  be
consummated at the Closing, each of the parties hereby waives any rights that it
or  they  may  have  to  rescind  this  Agreement  or  transactions  consummated
hereunder;  PROVIDED,  THAT,  this waiver  shall not affect any other  rights or
remedies available to the parties to the extent provided under this Agreement.

                                    ARTICLE X
   
                                  HOLDBACK FUND

         Section 10.01 HOLDBACK PERIOD. USSC shall retain the Holdback Funds for
a period  of two  years  from the  Closing  Date (the  "Holdback  Period").  The
Holdback Funds shall be invested in a money market account with Bank of New York
(with  interest  earned thereon to be for the benefit of the  Shareholders)  and
shall be used to pay USSC Claims in accordance  with Article IX and this Article
X.

         Section 10.02 THIRD PARTY CLAIMS.  If during the Holdback Period,  USSC
believes that it is entitled to indemnification with respect to a USSC Claim and
such USSC Claim  involves  an amount  claimed by a third  party in excess of the
Shareholders' Financial Basket or the Shareholders' Non-Financial Basket, as the
case may be, USSC shall give the Shareholders  notice of the particulars of such
USSC Claim in reasonable  detail, to the extent it has actual knowledge thereof.
The Shareholders shall have thirty (30) days from the receipt of such notice, by
notice  to USSC,  to (i)  acknowledge  that such USSC  Claim is  covered  by the
indemnification  provisions  of Article  IX and that the amount  claimed by such
third party is correct, in which case USSC shall have the right to pay such USSC
Claim from the  Holdback  Funds,  or (ii) deny that the  amount  claimed by such
third party is correct,  in which case the Shareholders shall indemnify,  defend
and hold the USSC Indemnitees harmless with respect to such USSC Claim and shall
have the right to conduct the defense of and to settle such USSC Claim, or (iii)
deny  that such USSC  Claim is  covered  by the  indemnification  provisions  of
Article  IX,  in which  case USSC  shall  have the sole and  exclusive  right to
determine whether to pay or contest such amount claimed by such third party (and
may use the Holdback  Funds for such payment) and the provisions of Article XIII
(Arbitration of Certain Claims) shall be applicable only as to whether such USSC
    


                                      -42-


<PAGE>

   
Claim is subject to the indemnification  provisions, but the amount of such USSC
Claim shall not be contestable by the Shareholders. If in such arbitration it is
determined that the USSC Claim is covered by the  indemnification  provisions of
Article IX, then USSC shall be deemed to have properly  used the Holdback  Funds
to satisfy such USSC Claim.  If in such  arbitration  it is determined  that the
USSC Claim is not covered by the indemnification  provisions of Article IX then,
in such event, USSC shall add to the Holdback Funds with interest earned thereon
the amount of the Holdback  Funds which was used by USSC to pay such USSC Claim.
The failure by the  Shareholders to give such notice within such thirty (30) day
period shall be deemed to be an  acknowledgment  that such USSC Claim is covered
by the  indemnification  provisions of Article IX and that the amount claimed by
such third party is correct.

         Section 10.03 NON-THIRD PARTY CLAIMS.  If, during the Holdback  Period,
USSC  believes  that it is entitled to  indemnification  with  respect to a USSC
Claim and wishes to utilize the Holdback  Funds for such purpose,  and such USSC
Claim does not involve an amount  claimed by a third party,  USSC shall give the
Shareholders  notice of the particulars of such USSC Claim in reasonable detail,
to the extent it has  actual  knowledge  thereof.  The  Shareholders  shall have
thirty (30) days from the receipt of such notice,  by notice to USSC,  to either
(i) acknowledge that the USSC Claim is covered by the indemnification provisions
of Article IX and that the amount of such USSC Claim is  correct,  in which case
USSC shall pay such USSC Claim from the  Holdback  Funds to the extent that such
USSC Claim  exceeds  the  Shareholders'  Financial  Basket or the  Shareholders'
Non-Financial Basket, as may be applicable, or (ii) deny that such USSC Claim is
covered by the  indemnification  provisions of Article IX and/or that the amount
of USSC  Claim  is  correct,  in which  case  the  provisions  of  Article  XIII
(Arbitration of Certain Claims) shall be applicable.  If in such  arbitration it
is determined that the USSC Claim is covered by the indemnifications  provisions
of Article IX, then USSC shall have the right to use the  Holdback  Funds to pay
or reimburse USSC for such USSC Claim as determined in such arbitration,  to the
extent in excess of the  amount  of the  Shareholders'  Financial  Basket or the
Shareholders'  Non-Financial  Basket, as the case may be. If in such arbitration
it is  determined  that the USSC  Claim is not  covered  by the  indemnification
provisions  of Article IX then,  in such event,  USSC shall have no right to use
any such  Holdback  Funds to pay or  reimburse  USSC for such  USSC  Claim.  The
failure by the  Shareholders  to give such  notice  within  such thirty (30) day
period shall be deemed an acknowledgment  that such USSC Claim is covered by the
indemnification  provisions of Article IX and that the amount of such USSC Claim
is correct.

         Section  10.04  RETURN OF HOLDBACK  FUNDS.  At the end of the  Holdback
Period,  USSC shall deliver the Holdback Funds  (including all accrued  interest
thereon)  LESS  the  aggregate  amount  with  respect  to  USSC  Claims  paid in
accordance with this Article X to
    


                                      -43-


<PAGE>

   
the  Shareholders  in the proportion 51% to E-Z-SUB and 49% to CalMed  (provided
that in the  case of any  USSC  Claim  with  respect  to  which  it is the  sole
responsibility  of only one of the  Shareholders  to indemnify,  such USSC Claim
shall be paid out of such Shareholder's  portion of the Holdback Funds, provided
both Shareholders give their consent thereto and hold USSC harmless with respect
to such  apportionment of the Holdback  Funds).  If there is any USSC Claim with
respect to which USSC has given notice to the  Shareholders  prior to the end of
the  Holdback  Period and which is not yet  resolved,  USSC may retain an amount
from the Holdback  Funds  sufficient  to pay such  unresolved  USSC Claim (after
giving consideration to the Shareholders'  Financial Basket or the Shareholders'
Non-Financial  Basket,  as may be  applicable)  and shall  deliver any remaining
Holdback Funds (including all accrued  interest  thereon) to the Shareholders as
provided above upon resolution of such unresolved USSC Claim.
    

                                   ARTICLE XI
                             Non-Compete/Tax Matters

         Section 11.01 NON COMPETE.

         (a) Each of the  Shareholders  hereby  covenants  and agrees that for a
period of two (2) years from the Closing  Date,  or if  shorter,  for as long as
will legally be allowed from the Closing Date,  not to,  directly or indirectly,
become engaged, or render services,  or have any interest (whether as a partner,
stockholder,  joint  venturer  or owner)  directly or  indirectly,  to or in any
Person other than USSC, engaged, or about to become engaged, to the knowledge of
such  Shareholder,  anywhere in the world,  or, if less, in any parts thereof as
will be  legally  enforceable,  in the  business  of  development,  manufacture,
marketing or sale of (i) spinal fusion cages or for interlocking  fusions or the
treatment  of  lower  back  pain,  or  (ii)  devices  for or  endoscopic  lumbar
discectomy.

         (b) If any covenant set forth in Section  11.01 is construed by a court
of competent  jurisdiction to be unenforceable because of its scope or duration,
the affected  parties  agree that such court shall have the power to modify such
scope or duration and, as so modified,  said covenant  shall be given full force
and effect. If any of such covenant or a portion thereof is otherwise  construed
to be invalid or unenforceable, the same shall not affect the remaining covenant
or remaining portion,  which shall be given full force and effect without regard
to the invalid  covenant or portion,  and without regard to the invalid covenant
or portion.

         (c) Each  Shareholder  acknowledges  and agrees that any breach of this
Section 11.01 by such Shareholder would likely cause irreparable  injury to USSC
and  that  USSC's  remedy  at law for  any  such  breach  would  be  inadequate.
Accordingly, each Shareholder


                                      -44-


<PAGE>

agrees that in addition to any other remedies  provided for herein temporary and
permanent  injunctive  relief  may be  granted  in any  proceeding  which may be
brought  by  USSC  to  enforce  any  violation  of this  Section  11.01  by such
Shareholder from its willful misconduct.

         (d) The parties  acknowledge and agree that the covenants  contained in
this Section 11.01 are materially  significant and essential to the transactions
contemplated by this Agreement.

         11.02 TAXABLE PURCHASES.  It is understood,  agreed and intended by the
parties that the Merger will be treated for U.S.  Federal income tax purposes as
taxable purchase of the Shares by USSC, pursuant to the principles enunciated in
revenue ruling 73- 427, and the parties agree to take no positions  inconsistent
with the  treatment  of the Merger as a taxable  stock  purchase  by USSC of the
Shares for Federal income tax purposes.

                                   ARTICLE XII
                                  MISCELLANEOUS

         Section 12.01 NOTICES.  All notices,  consents,  waivers,  approvals or
other  communications  required or permitted  hereunder  shall be in writing and
shall be  sufficiently  given if  delivered  by  messenger,  sent by  recognized
overnight  courier service,  prepaid,  or by registered or certified mail return
receipt requested, postage paid as follows, and any such notice or communication
shall be deemed to have been given:  (a) if delivered by messenger on the day of
delivery, if a Business Day and if not, on the first Business Day thereafter (b)
if sent via courier on the next  Business  Day,  or (c) if sent by mail,  on the
third Business Day after mailing:

To USSC and USSC Transitory Sub:   United States Surgical
                                   Corporation

                                   150 Glover Avenue
                                   Norwalk, CT 06856
                                   Attention: Thomas R. Bremer
                                   Senior Vice President and
                                   General Counsel

To E-Z-M AND E-Z-SUB:

                                   E-Z-EM, Inc.
                                   717 Main
                                   Westbury, NY 11590-5021
                                   Attention: Mr. Daniel R. Martin
                                              President & CEO

Copy to:                           Steven H. Levin, Esq.
                                   Goodman Phillips & Vineberg
                                   430 Park Avenue,  10th Floor


                                      -45-


<PAGE>



                                   New York, New York  10022

To CalMed:                         CalMed Laboratories, Inc.
                                   c/o Henry Klyce
                                   231 Sandringham
                                   Piedmont, California 94611

Copy to:                           Allen Grossman, Esq.
                                   Greene, Radovsky, Maloney & Share
                                   One Market Plaza, 42nd Floor
                                   San Francisco, CA 94105

To Surgical Dynamics:              2575 Stanwell Drive
                                   Concord, CA 94520
                                   Attention: Henry Klyce,
                                   Attention: Chief Executive Officer

         Section 12.02 CERTAIN  EXPENSES AND COSTS. All legal and other expenses
incurred in connection  with the  transactions  contemplated  by this Agreement,
shall be paid by the party incurring such expenses.

         Section 12.03 BINDING  EFFECT;  SUCCESSORS AND ASSIGNS;  NO THIRD PARTY
BENEFIT.  This Agreement shall be binding upon and shall inure to the benefit of
the parties and their respective successors and assigns; provided, however, that
neither  this  Agreement  nor any right  hereunder  may be assigned by any party
without the consent of the other parties.  Except as otherwise set forth herein,
nothing in this  Agreement,  expressed or implied,  is intended to confer on any
person other than the parties  hereto or their  respective  successors and valid
assigns any rights, remedies,  obligations, or liabilities under or by reason of
this Agreement.

         Section 12.04 ENTIRE AGREEMENT;  AMENDMENT.  This Agreement,  including
the Schedules and Exhibits hereto,  embodies the entire agreement of the parties
hereto  with  respect to the  subject  matter  hereof and  supersedes  all prior
agreements and understandings, oral or written, with respect thereto, except for
the  Confidential  Disclosure  Agreement  dated April 3, 1995 and the Evaluation
Agreement  dated  August 3, 1995 which shall  continue in full force and effect.
This  Agreement may be amended,  and any provision  hereof  waived,  but only in
writing  signed by all the parties  hereto.  In  addition,  the  inclusion in an
Exhibit,  Schedule,  certificate or other  document of information  that is not,
pursuant to this Agreement,  required to be included therein, shall not have the
effect of changing any threshold or otherwise  modifying any  requirement(s)  of
disclosure.

         Section 12.05 FURTHER  ASSURANCES.  SDI, the Shareholders and USSC each
agree,  prior to and after the Closing Date, to cooperate  with the other and to
execute and deliver such other documents,

                                      -46-


<PAGE>

certificates,  agreements  and other  writings and to take such other actions as
may  be  necessary  or  desirable  in  order  to  implement   expeditiously  the
transactions contemplated by this Agreement.

         Section 12.06  GOVERNING LAW. This  Agreement  shall be governed by and
construed  under and in  accordance  with the internal  laws of the State of New
York without giving effect to its principle of conflict of law.

         Section 12.07 CONSENT TO JURISDICTION.  USSC, USSC Transitory Sub , SDI
and each of the Shareholders  hereby  irrevocably  agree that any Action arising
out of this Agreement may be brought against all or any of them in any competent
court of the State of New York or in any  competent  court of the United  States
located  within the State of New York.  Service of process  with  respect to any
such Action may be made upon it by certified first class mail, postage pre-paid,
sent to the  addressees  set forth in  Section  12.01  above,  and that any such
service  of  process  shall be taken as  valid  personal  service  upon it being
effective  five (5) Business  Days after  mailing as  aforesaid,  whether or not
USSC, USSC Transitory Sub, SDI or such  Shareholder  shall then be doing, or any
time shall have done, business within New York.

         Section 12.08 SPECIFIC PERFORMANCE.  The Shareholders  acknowledge that
because  the  Shares  are  unique,  USSC and USSC  Transitory  Sub will  have no
adequate  remedy  at  law if the  Shareholders  fail  to  perform  any of  their
obligations hereunder, and that in such event, USSC and USSC Transitory Sub will
have the right,  in  addition  to any other  remedies  it may have,  to specific
performance of this Agreement.

         Section  12.09 PUBLIC  ANNOUNCEMENTS.  SDI and the  Shareholders  shall
cooperate with USSC in the  preparation  and the timing of the release of a USSC
press release concerning this transaction. Neither SDI or the Shareholders shall
issue a press  release,  or make any public  announcement,  comment or statement
concerning  this  transaction  or any aspects of this  Agreement  without  first
advising and  receiving  the written  consent of USSC in advance;  provided that
E-Z-M may make any public announcement or statement it deems appropriate, in its
sole  discretion,  to comply with applicable Law or the rules of any exchange on
which its shares are listed,  PROVIDED THAT E-Z-M provide a copy of the proposed
public announcement or statement as far in advance as is reasonably possible.

         Section 12.10 WAIVER. No waiver by either party, express or implied, of
any breach of any term,  condition,  or  obligation of this  Agreement  shall be
construed  as a waiver  of any  subsequent  breach of any  term,  condition,  or
obligation of this Agreement, whether of the same or different nature.


                                      -47-


<PAGE>

         Section 12.11  COUNTERPARTS.  This  Agreement may be executed in one or
more  counterparts,  all of which shall be considered one and the same agreement
and shall become  effective  when one or more  counterparts  have been signed by
each of the parties and delivered to the other parties.

         Section  12.12  CAPTIONS.  The captions and headings used herein and in
the  Exhibits  and  Schedules  hereto are intended and shall for all purposes be
deemed  to be for  convenience  of  reference  only and  shall be of no force or
effect whatsoever in the construction or interpretation of this Agreement.

         Section  12.13  PRIORITY.  Where  the same  matter  falls  within  both
specific  as  well  as  general  provisions  of  this  Agreement,  the  specific
provisions shall be controlling and take priority over the general provisions.

         Section 12.14 ATTORNEYS' FEES. If any Action (other than an arbitration
proceeding) is brought for the enforcement of this  Agreement,  or because of an
alleged dispute,  breach, default or misrepresentation in connection with any of
the provisions  hereof,  the successful or prevailing  party or parties shall be
entitled  to recover  reasonable  attorneys'  fees and other  costs  incurred in
connection with that Action, in addition to any other relief to which it or they
may be entitled.

         Section  12.15  E-Z-M/E-Z-SUB.  E-Z-M and  E-Z-SUB  hereby  jointly and
severally  represent  and  warrant  to  USSC  that  E-Z-SUB  is  a  wholly-owned
subsidiary of E-Z-M.  E-Z-M and E-Z-SUB jointly and severally covenant and agree
with  USSC that (a)  representations  and  warranties  made by  E-Z-SUB  in this
Agreement  and any  documents  executed in  connection  with this  Agreement are
hereby adopted as and shall be deemed  representations  and  warranties  made by
E-Z-M, which shall be jointly and severally liable in all respects with E- Z-SUB
with respect  thereto and that (b) all covenants  and  agreements on the part of
E-Z-SUB to be performed,  observed and complied  with  hereunder are adopted and
are  covenants  and  agreements  of  E-Z-M as if it were the  party  obliged  to
perform,  observe and comply with such  covenants and  agreements,  it being the
intent hereof that E-Z-M shall be jointly and  severally  liable to USSC for the
performance, observance and compliance by E-Z-SUB for all of E-Z-SUB's covenants
and agreement hereunder and for the correctness of all E-Z-SUB's representations
and warranties hereunder.

         Section 12.16  USSC/USSC  TRANSITORY  SUB. USSC and USSC Transitory Sub
hereby jointly and severally  represent and warrant to SDI and the  Shareholders
that USSC  Transitory  Sub is a wholly-owned  subsidiary of USSC.  USSC and USSC
Transitory  Sub  jointly  and  severally  covenant  and  agree  with SDI and the
Shareholders that (a) representations and warranties made by USSC Transitory Sub
in this Agreement and any documents executed in connection with this


                                      -48-


<PAGE>
Agreement  are  hereby  adopted  as and  shall  be  deemed  representations  and
warranties  made by USSC,  which  shall be jointly and  severally  liable in all
respects  with  USSC  Transitory  Sub  with  respect  thereto  and  that (b) all
covenants  and  agreements on the part of USSC  Transitory  Sub to be performed,
observed  and  complied  with  hereunder  are  adopted  and  are  covenants  and
agreements  of USSC as if it were the party  obliged  to  perform,  observe  and
comply with such covenants and agreements,  it being the intent hereof that USSC
shall be  jointly  and  severally  liable  to SDI and the  Shareholders  for the
performance,  observance and  compliance by USSC  Transitory Sub for all of USSC
Transitory  Sub's covenants and agreements  hereunder and for the correctness of
all USSC Transitory Sub's representations and warranties hereunder.

                                  ARTICLE XIII
                          ARBITRATION OF CERTAIN CLAIMS

         Section 13.01 ARBITRATION OF CERTAIN CLAIMS.

         (a) With respect to disputes between the parties (i) as to which of the
parties has the right to receive the Deposit under Section 2.05, or (ii) arising
under Section  10.02 or 10.03 , either USSC or a  Shareholder  may, by notice to
the other,  demand arbitration of the matter which shall be settled by final and
binding  arbitration  conducted by a panel of three arbitrators.  Within fifteen
(15) days after such notice is sent, USSC and the Shareholder  shall each select
one  arbitrator,  and the two  arbitrators  so  selected  shall  select  a third
arbitrator. The decision of the arbitrators as to the validity and amount of any
claim shall be binding and conclusive upon the affected parties, and the parties
shall be entitled to act in  accordance  with such  decision.  Judgment upon any
award  rendered  by  the   arbitrators  may  be  entered  in  any  court  having
jurisdiction.

         (b) Any such arbitration  shall be held in New York, New York under the
Rules of  Practice  and  Procedure  (the  "Rules")  of  Judicial  Arbitration  &
Mediation  Services,  Inc.  ("JAMS").  The parties shall have the same discovery
rights as parties to a civil action in the Supreme Court of New York would have.
Such arbitration  shall be governed by the laws of the State of New York, In any
such arbitration hereunder, each party shall pay its own expenses, including the
expenses of the arbitrator it selects PLUS one-half of the expenses of the third
arbitrator,  unless the award made by the arbitrator provides for a party to pay
such expenses.


                                      -49-


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

                                        UNITED STATES SURGICAL CORPORATION

                                        By: /S/ THOMAS R. BREMER
                                            ------------------------------
                                        Name:   Thomas R.  Bremer
                                        Title:  Senior Vice President and
                                                General Counsel

                                        USSC ACQUISITION CORPORATION



                                        By: /S/ THOMAS R. BREMER
                                            --------------------------------
                                        Name:  Thomas R. Bremer
                                        Title: President

                                        SURGICAL DYNAMICS INC.


                                        By: /S/ HENRY KLYCE
                                            --------------------------------
                                        Name:  Henry Klyce
                                        Title: President


                                        E-Z-EM INC.


                                        By: /S/ DANIEL R. MARTIN
                                            --------------------------------
                                        Name: Daniel R. Martin
                                        Title: President

                                      -50-


<PAGE>


                                        CALMED LABORATORIES, INC.


                                        By: /S/ HENRY KLYCE
                                            --------------------------------
                                        Name: Henry Klyce
                                        Title: President


                                        E-Z-SUB, INC.



                                        By: /S/ DENNIS CURTIN
                                            --------------------------------
                                            Name: Dennis Curtin
                                            Title: Treasurer and Secretary


                                      -51-




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