MEDICAL DYNAMICS INC
8-K, 1997-11-07
PHOTOGRAPHIC EQUIPMENT & SUPPLIES
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                       SECURITIES AND EXCHANGE COMMISSION
                                Washington, D.C.

                                    FORM 8-K

                 CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d)
                     OF THE SECURITIES EXCHANGE ACT OF 1934

                        Date of Report: October 23, 1997


                             MEDICAL DYNAMICS, INC.
              --------------------------------------------------
             (Exact name of Registrant as specified in its charter)

                         Commission file number: 0-8632

          Colorado                                              84-0631765
          --------                                              ----------
(State or other jurisdiction of                                (IRS Employer
incorporation or organization)                            Identification Number)


         99 Inverness Drive East
           Englewood, Colorado                          80112
           -------------------                          -----
(Address of principal executive offices)              (Zip Code)


               Registrant's telephone number, including area code:
                                 (303) 790-2990

                                 not applicable
                  former name or former address, if applicable



<PAGE>



Item 2: Acquisition or Disposition of Assets

     On October 23,  1997,  effective as of October 1, 1997,  Medical  Dynamics,
Inc.  ("MEDY")  acquired all of the  outstanding  capital  stock of Computer Age
Dentist, Inc. ("CADI"), a California corporation, which is based in Los Angeles,
California  and is engaged in the  business of  development  and sales of dental
practice management software and related electronic services.

     The acquisition was accomplished pursuant to a reverse triangular merger by
which MEDY paid to the two former shareholders of CADI:  1,295,520 shares of its
restricted common stock,  promissory notes aggregating $300,000, and $254,697 in
cash. In addition, MEDY assumed certain existing obligations of CADI to a former
shareholder  and satisfied  such  obligations  by paying the former  shareholder
304,480 shares of restricted MEDY common stock,  $45,303 in cash, and a $100,000
promissory  note. The  promissory  notes are due, in full, no later than October
23,  1998.  MEDY  used  its  working  capital  to pay the  cash  portion  of the
acquisition price. There was no prior relationship  between MEDY and either CADI
or its  shareholders.  As a  result  of the  acquisition,  the two  former  CADI
shareholders,  Daniel L.  Richmond and Chae U. Kim, were named to the MEDY Board
of Directors.  MEDY's president and Chief Executive Officer, Van Horsley, became
a director and vice  president  of CADI.  MEDY agreed to use its best efforts to
register for resale  240,000  shares of the stock issued in the  transaction  at
some time during the first year  following the  completion  of the  transaction.
MEDY has not yet commenced this registration.

     In acquiring CADI, MEDY also acquired cash, trade receivables, inventories,
and personal property and equipment owned by CADI. CADI employs approximately 40
people, including its two principals, Daniel L. Richmond and Chae U. Kim. In the
opinion of MEDY's  management,  the  fundamental  source of value  obtained  was
CADI's software  technology which includes source code,  development  costs, and
the potential for future sales of the dental practice  management  software,  as
well as CADI's current technical support contracts with its customers.  CADI has
a base of more than 2,200 customer  installations  throughout the United States,
serving in excess of 3,500 dental professionals.

     Daniel L. Richmond,  one of the two principals of CADI and Chief  Executive
Officer of CADI since its  inception  in June 1987,  holds a Bachelor of Science
degree in mathematics and computer  science from the University of California at
Los Angeles.  Chae U. Kim, the other  principal of CADI,  has been  president of
CADI since its inception in June 1987 and holds a Bachelor of Science  degree in
biology from the University of California at Los Angeles.  Messrs.  Richmond and
Kim also continued as employees of CADI under five year employment contracts. As
partial  consideration  for their  continuing  employment,  they  each  accepted
options to acquire a total of 600,000 shares of MEDY common stock. These options
vest on the  occurrence  of  certain  revenue  and profit  goals.  If not vested
earlier,  the options  will all vest on March 31, 2004,  and they expire  unless
exercised by September 30, 2004.


<PAGE>




Item 5.  Other Events.

     On October 31,  1997,  MEDY sold a  convertible  debenture in the amount of
$1,100,000  to Tail Wind Fund,  Ltd.  pursuant to  Regulation  D. The  following
provides the information required by Item 701 of Regulation S-B.

     (A)  The  title  of the  securities  sold  is:  8%  convertible  debenture,
          convertible  into shares of MEDY common stock at the rate equal to the
          Market Price (as defined in the  debenture) but not greater than $3.45
          per share. Interest on the principal amount is payable quarterly,  and
          the  principal  amount of the  debenture is payable in full on October
          31,  2000.  MEDY is entitled to make  payment of interest in shares of
          its common stock valued at the Market Price (as defined).

     (B)  Rochon Capital Ltd., San Rafael, California,  acted as placement agent
          for the transaction.

     (C)  The total  offering  price was  $1,100,000.  A commission of 8.75% was
          paid to the  placement  agent,  and legal fees and expenses of $17,500
          were reimbursed to the placement agent and the purchaser.

     (D)  The transaction was exempt from registration  pursuant to Section 4(2)
          of the Securities Act of 1933, as amended, and Rule 506 thereunder.

     (E)  The  debenture  is  convertible  into shares of MEDY  common  stock as
          described  in  paragraph  (A),  above.  In  addition,  MEDY  issued  a
          five-year  warrant to the  purchaser to acquire  84,615 shares of MEDY
          common stock,  exercisable at 120% of Market Price (as defined) at the
          time of the Closing of the  private  placement,  but not greater  than
          $3.375.  One-third  of  the  principal  amount  of  the  debenture  is
          convertible  from and after January 29, 1998, an additional  one-third
          from and after  February 28, 1998;  and the entire  debenture from and
          after March 30, 1998.

     (F)  MEDY  undertook  to file a  registration  on Form S-3 and  (subject to
          certain  conditions)  obtain its  effectiveness  within 90 days of the
          completion of the transaction.  The registration  statement will allow
          resale of the MEDY  shares  only  after  conversion,  if the  investor
          actually  elects to  convert.  If the  registration  statement  is not
          effective as required under the Registration  Rights  Agreement,  MEDY
          will be obligated to pay  liquidated  damages to the investor equal to
          2% of the aggregate  principal  amount of the debenture for each month
          during which the Registration Statement is not effective.




<PAGE>



Item 7.  Financial Statements and Exhibits

     (A)  Financial  statements  of Computer Age  Dentist,  Inc. (to be filed by
          amendment).

     (B)  Pro forma financial statements of Medical Dynamics,  Inc. (to be filed
          by amendment)

     (C)  Exhibits

          1.   Agreement  and Plan of Merger by and  between  Medical  Dynamics,
               Inc., CADI  Acquisition  Corp.,  and Computer Age Dentist,  Inc.,
               dated as of October 1, 1997.

          2.   Form of Registration  Rights Agreement  between Medical Dynamics,
               Inc., Daniel L. Richmond, Chae U. Kim and James DeVico, Jr.

          3.   Purchase  Agreement  between Medical  Dynamics, Inc and The Tail
               Wind Fund, Ltd.

          4.   Form of Convertible Debenture

          5.   Registration Rights Agreement between Medical Dynamics,  Inc. and
               The Tail Wind Fund, Ltd.

          6.   Common Stock Purchase Warrant issued to The Tail Wind Fund, Ltd.




<PAGE>



                                   SIGNATURES

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

                                         MEDICAL DYNAMICS, INC.



November 6, 1997                          By: /s/  VAN A. HORSLEY
                                              ---------------------------------
                                              Van A. Horsley, President








                          AGREEMENT AND PLAN OF MERGER

                                      AMONG

                 MEDICAL DYNAMICS, INC. (A COLORADO CORPORATION)

                CADI ACQUISITION CORP. (A CALIFORNIA CORPORATION)

                                       AND

              COMPUTER AGE DENTIST, INC. (A CALIFORNIA CORPORATION)

                              AS OF OCTOBER 1, 1997





<PAGE>


     This Agreement and Plan of Merger (the  "Agreement")  is made as of the 1st
day of October,  1997,  among  Medical  Dynamics,  Inc., a Colorado  corporation
("MEDY");   CADI  Acquisition  Corp.,  a  California  corporation  (the  "Merger
Subsidiary"),  which is wholly owned by MEDY; and Computer Age Dentist,  Inc., a
California corporation ("CADI").


                                    RECITALS
                                    --------

     WHEREAS,  the respective Boards of Directors of MEDY, the Merger Subsidiary
and  CADI  each  have  determined  that it is in the  best  interests  of  their
respective  stockholders  for MEDY to  acquire  CADI  through  the merger of the
Merger  Subsidiary  with and into CADI upon the terms and  conditions  set forth
herein;

     NOW,  THEREFORE,  in  consideration  of the mutual covenants and agreements
contained herein, and certain other good and valuable consideration, the receipt
and sufficiency of which is hereby acknowledged, the parties hereto covenant and
agree as follows:

                                   ARTICLE 1.

                                   The Merger
                                   ----------

     1.1 Merger and the Merger Consideration.  In accordance with the provisions
of the  California  Corporations  Code  (the  "CCC") at the  Effective  Date (as
hereinafter defined),  the Merger Subsidiary shall be merged (the "Merger") into
CADI,  as  soon  as  practicable   following  the  satisfaction  or  waiver,  if
permissible,  of the conditions set forth in Articles 6 and 7. The consideration
to be paid to the  shareholders  of CADI as a result of the Merger (the  "Merger
Consideration") consists of:

     1,295,520  shares of MEDY Common Stock (which  shares will be restricted as
     that term is  defined  in Rule 144 under  the  Securities  Act of 1933 (the
     "1933 Act");

     $254,697 in cash; and

     Two  promissory  notes,  each in the  amount  of  $150,000  in the  form of
     Schedule 1.1 hereto.

Following  the Merger,  CADI shall  continue as the surviving  corporation  (the
"Surviving  Corporation")  and shall  continue to be governed by the laws of the
State of California.





                                       -1-

<PAGE>



     1.2 Continuing of Corporate Existence. Except as may otherwise be set forth
herein,  the corporate  existence  and identity of CADI,  with all its purposes,
powers, franchises, privileges, rights and immunities, shall continue unaffected
and  unimpaired by the Merger,  and the corporate  existence and identity of the
Merger Subsidiary, with all its purposes, powers, franchises, privileges, rights
and  immunities,  at the  Effective  Date shall be merged  with and into that of
CADI,  and the  Surviving  Corporation  shall be vested fully  therewith and the
separate corporate  existence and identity of Merger Subsidiary shall thereafter
cease except to the extent continued by statute.

     1.3 Effective  Date.  The Merger shall become  effective upon the filing of
the Articles of Merger with the Secretary of State of California pursuant to the
provisions of the CCC. The date and time when the Merger shall become  effective
is hereinafter referred to as the "Effective Date".

     1.4 Corporate Government of the Surviving Corporation.

          (a) The  Articles  of  Incorporation  of  CADI,  as in  effect  on the
Effective  Date,  shall  continue  in full  force  and  effect  and shall be the
Articles of Incorporation of the Surviving Corporation.

          (b) The Bylaws of CADI, as in effect as of the Effective  Date,  shall
continue  in full  force and  effect  and shall be the  Bylaws of the  Surviving
Corporation.

          (c) The members of the Board of Directors of the Surviving Corporation
shall be the  persons  holding  such office in the Merger  Subsidiary  as of the
Effective Date. Immediately following the Effective Date, the Board of Directors
of the  Surviving  Corporation  shall be  reconstituted  to  consist  of  Daniel
Richmond, Chae Uk Kim, and Van Horsley.

          (d) The  officers of the  Surviving  Corporation  shall be the persons
holding such offices in CADI as of the Effective Date.

     1.5 Rights and  Liabilities  of the  Surviving  Corporation.  The Surviving
Corporation shall have the following rights and obligations:

          (a) The Surviving  Corporation shall have all the rights,  privileges,
immunities and powers and shall be subject to all the duties and  liabilities of
a corporation organized under the laws of the State of California.

          (b) The title to all real estate and other  property  owned by each of
CADI and the Merger  Subsidiary shall be, at the Effective Date,  transferred to
and vested in the Surviving  Corporation  without  reversion or impairment;  and
such transfer to and vesting in the Surviving  Corporation  shall be  deemed  to




                                       -2-

<PAGE>



to occur by  operation  of law,  and no consent or approval of any other  person
shall be required in connection  with any such  transfer or vesting  unless such
consent or approval is specifically required in the event of merger by law or by
express provision in any contract, agreement, decree, order, or other instrument
to which CADI or the Merger Subsidiary is a party or by which it is bound.

          (c) At the Effective Date, the Surviving Corporation shall thenceforth
have all  liabilities  of CADI and the  Merger  Subsidiary,  and any  proceeding
pending against CADI or the Merger  Subsidiary may be continued as if the Merger
did not occur or the Surviving  Corporation may be substituted in the proceeding
for the Merger Subsidiary.

     1.6 Closing.  Completion of the transactions contemplated by this Agreement
(the  "Closing")  shall take place at the  executive  offices of MEDY in Denver,
Colorado, commencing at 10:00 a.m., local time, as soon as practicable after the
last to be fulfilled or waived of the  conditions  set forth in Articles 6 and 7
or at such  other  place,  time and date as shall be fixed by  mutual  agreement
between MEDY and CADI.  The day on which the Closing  shall occur is referred to
herein as the "Closing Date." Each party will cause to be prepared, executed and
delivered  the  Articles  of Merger to be filed with the  Secretary  of State of
California and all other appropriate and customary documents as any party or its
counsel may reasonably  request for the purpose of completing  the  transactions
contemplated by this Agreement. All actions taken at the Closing shall be deemed
to have been taken  simultaneously  at the time the last of any such  actions is
taken or completed.

     1.7 Tax  Consequences.  It is intended  that the Merger shall  constitute a
reorganization  within  the  meaning  of Section  368(a)(2)(E)  of the  Internal
Revenue Code of 1986, as amended (the  "Code"),  and that this  Agreement  shall
constitute  a "plan of  reorganization"  for the  purposes of Section 368 of the
Code.

                                    ARTICLE 2
                   Conversion of Shares; Treatment of Options
                   ------------------------------------------

     2.1  Conversion  of Shares;  Payment of the  Merger  Consideration.  At the
Effective  Date,  by virtue of the Merger and  without any action on the part of
the holder thereof:

          (a) Each share of common stock of CADI ("CADI  Common  Stock"),  which
shall be outstanding  immediately  prior to the Effective  Date (the  "Converted
Shares")  shall at the  Effective  Date, by virtue of the Merger and without any
action on the part of the holder  thereof,  be converted  into and represent the
right to receive:

     43.184 shares of Common Stock of MEDY (the "MEDY Common Stock"); and





                                       -3-

<PAGE>


     A proportionate amount of the Merger Consideration  represented by the cash
     and note payable.

          (b) Each share of Common Stock of the Merger Subsidiary which shall be
outstanding immediately prior to the Effective Date shall at the Effective Date,
by  virtue of the  Merger  and  without  any  action  on the part of the  holder
thereof, be converted into one share of newly issued CADI Common Stock.

          (c) No CADI shareholders will dissent from the transaction.

     2.2 Fractional  Shares.  No scrip or fractional shares of MEDY Common Stock
shall be issued in the Merger.  All  fractional  shares of MEDY Common  Stock to
which a holder of CADI Common  Stock  immediately  prior to the  Effective  Date
would  otherwise be entitled at the  Effective  Date shall be  aggregated.  If a
fractional share results from such aggregation,  the fraction will be rounded to
one and such  stockholder  shall be entitled to receive an  additional  share of
MEDY Common Stock.

     2.3  Stock  Options  and  Warrants.  There  are  no  options,  warrants  or
convertible securities outstanding entitling the holder thereof to purchase CADI
Common Stock.

     2.4 Adjustment. If, between the date of this Agreement and the Closing Date
or the Effective Date, as the case may be, the outstanding shares of CADI Common
Stock or MEDY Common Stock shall have been  changed  into a different  number of
shares or a different class by reason of any  classification,  recapitalization,
split-up,  combination,  exchange of shares, or readjustment or a stock dividend
thereon shall be declared with a record date within such period, then the Merger
Consideration shall be adjusted to accurately reflect such change.

                                    ARTICLE 3

                     Representations and Warranties of CADI
                     --------------------------------------

     CADI  represents  and warrants to MEDY and the Merger  Subsidiary  that the
statements  contained in Article 3 are true and correct in all material respects
and will be true and  correct as of the  Closing  Date and the  Effective  Date,
except as set forth in the schedules  attached hereto. As used in this Article 3
and elsewhere in this Agreement, the phrases "to CADI's knowledge" or "to CADI's
actual knowledge" shall mean to the actual knowledge of Dan Richmond and Chae Uk
Kim, executive officers of CADI.

     3.1  Organization  and Good Standing of CADI.  CADI is a  corporation  duly
organized, validly existing and in good standing under the laws of California.





                                       -4-

<PAGE>



     3.2 No Subsidiaries or Investments. CADI owns no equity or debt interest in
any subsidiary  corporation,  limited liability company,  partnership,  or other
business  entity  except as  described  in  Schedule  3.2 of the CADI  financial
statements.

     3.3  Foreign  Qualification.  CADI  is duly  qualified  or  licensed  to do
business and is in good standing as a foreign  corporation in every jurisdiction
where the failure so to qualify  would have a material  adverse  effect (a "CADI
Material Adverse Effect") on (a) the business,  operations,  assets or financial
condition of CADI taken as a whole or (b) the validity or enforceability  of, or
the ability of CADI to perform  its  obligations  under,  this  Agreement.  CADI
affirmatively  represents  that it is  qualified  to do business in no state but
California.

     3.4 Company Power and Authority. CADI has the corporate power and authority
to own, lease and operate its properties and assets and to carry on its business
as currently  being  conducted.  CADI has the  corporate  power and authority to
execute  and  deliver  this  Agreement  and,  subject  to the  approval  of this
Agreement and the Merger by its  stockholders,  to perform its obligations under
this  Agreement  and  to  complete  the  Merger.  The  execution,  delivery  and
performance by CADI of this Agreement has been duly  authorized by all necessary
corporate action.

     3.5 Binding Effect.  This Agreement has been duly executed and delivered by
CADI and is the legal,  valid and  binding  obligation  of CADI  enforceable  in
accordance with its terms except that:

          (a) enforceability  may be limited by bankruptcy,  insolvency or other
similar laws affecting creditors' rights;

          (b) the availability of equitable remedies may be limited by equitable
principles of general applicability; and

          (c) rights to  indemnification  may be limited  by  considerations  of
public policy.

     3.6 Absence of  Restrictions  and Conflicts.  The  execution,  delivery and
performance  of  this  Agreement  and  the  completion  of the  Merger  and  the
fulfillment of and compliance with the terms and conditions of this Agreement do
not and will  not,  with the  passing  of time or the  giving of notice or both,
violate or conflict with, constitute a breach of or default under, result in the
loss of any material benefit under, or permit the acceleration of any obligation
under,  (i) any term or provision of the articles of  Incorporation or bylaws of
CADI,  (ii) any  "Material  Contract"  (as defined in Section  3.13),  (iii) any
judgment,  decree or order of any court or  governmental  authority or agency to
which CADI is a party or by which  CADI or any of its  properties  is bound,  or
(iv) any statute,  law,  regulation  or rule  applicable to CADI other than such
violations, conflicts, breaches or defaults which would not have a CADI Material


                                       -5-

<PAGE>



Adverse  Effect.  Except  for the  filing of the  Articles  of  Merger  with the
Secretary of State of California,  the  Securities Act of 1933 (the  "Securities
Act"),  Securities  Exchange Act of 1934, as amended (the "Exchange  Act"),  and
applicable state securities laws, no consent,  approval,  order or authorization
of, or  registration,  declaration  or filing with, any  governmental  agency or
public or regulatory  unit,  agency,  body or authority  with respect to CADI is
required in  connection  with the  execution,  delivery or  performance  of this
Agreement by CADI or the completion of the transactions contemplated hereby.

     3.7 Capitalization of CADI.

          (a) The authorized capital stock of CADI consists of 100,000 shares of
common  stock.  As of the date hereof,  there were 30,000  shares of CADI Common
Stock issued and  outstanding  and no shares of CADI Common  Stock  reserved for
issuance upon the exercise of any Options.

          (b) All of the issued and outstanding shares of CADI Common Stock have
been duly  authorized and validly issued and are fully paid,  nonassessable  and
free of preemptive rights.

          (c) There are no voting trusts, stockholder agreements or other voting
arrangements  by the  stockholders  of CADI  except that  certain  shareholders'
agreement which will be cancelled on or prior to the Effective Date.

          (d) There is no  outstanding  subscription,  contract,  convertible or
exchangeable security,  option,  warrant, call or other right obligating CADI to
issue,  sell,  exchange,  or  otherwise  dispose of, or to  purchase,  redeem or
otherwise  acquire,  shares of, or securities  convertible  into or exchangeable
for, capital stock of CADI.

     3.8 CADI Information.  CADI has made or will make available to MEDY and the
Merger  Subsidiary all  information  that CADI has available  (including all tax
returns,  financial  statements  given to any other person,  contracts,  payroll
schedules,  financial  books and records,  and all other  information  regarding
CADI, its business, its customers,  its management,  and its financial condition
which MEDY may have requested (all such information  being referred to herein as
the "CADI Information").  As of their respective dates, the CADI Information did
not contain any untrue  statement of a material fact or omit to state a material
fact required to be stated therein or necessary to make the statements  therein,
in light of the circumstances under which they were made, not misleading.

     3.9 Financial  Statements  and Records of CADI.  CADI has made available to
MEDY  and the  Merger  Subsidiary  true,  correct  and  complete  copies  of the
following financial statements (the "CADI Financial Statements"):




                                       -6-

<PAGE>




     Audited  Financial  Statements  as of September  30, 1996 and the year then
ended; and

     Unaudited Financial Statements as of June 30, 1997 and the nine months then
ended.

     The  CADI  Financial  Statements  have  been  prepared  from,  and  are  in
accordance  with, the books and records of CADI and its subsidiaries and present
fairly, in all material respects, the consolidated financial position of CADI as
of the dates  thereof and the results of  operations  and cash flows thereof for
the periods  then ended,  in each case in  conformity  with  generally  accepted
accounting principles,  consistently applied, except as noted therein.  Adequate
reserves are set forth on the CADI  Financial  Statements and the amount of such
reserves are reasonable.  Since September 30, 1996,  there has been no change in
accounting  principles applicable to, or methods of accounting utilized by, CADI
except as noted in the CADI Financial Statements.  The books and records of CADI
have been and are being  maintained in accordance  with good business  practice,
reflect  only valid  transactions,  are  complete  and  correct in all  material
respects and present fairly in all material respects the basis for the financial
position and results of  operations  of CADI as set forth on the CADI  Financial
Statements.

     3.10 Absence of Certain  Changes.  Since  September 30, 1996, CADI has not,
except as  otherwise  set forth in the CADI  Information  or the CADI  Financial
Statements:

          (a) suffered any adverse change in the business,  operations,  assets,
or financial condition,  except for such changes that would not result in a CADI
Material Adverse Effect;

          (b)  suffered  any material  damage or  destruction  to or loss of the
assets of CADI,  whether or not covered by insurance,  which  property or assets
are material to the operations or business of CADI;

          (c) settled,  forgiven,  compromised,  canceled,  released,  waived or
permitted  to lapse any  material  rights or claims  other than in the  ordinary
course of business;

          (d) entered into or terminated any material  agreement,  commitment or
transaction,  or agreed or made any  changes in material  leases or  agreements,
other than renewals or extensions thereof and leases,  agreements,  transactions
and commitments entered into or terminated in the ordinary course of business;

          (e)  written  up,  written  down or written  off the book value of any
material amount of assets other than in the ordinary course of business;

          (f)  declared,   paid  or  set  aside  for  payment  any  dividend  or
distribution with respect to CADI's capital stock;





                                       -7-

<PAGE>



          (g) redeemed,  purchased or otherwise  acquired,  or sold,  granted or
otherwise  disposed of,  directly or indirectly,  any of CADI's capital stock or
securities or any rights to acquire such capital stock or securities,  or agreed
to changes in the terms and conditions of any such rights  outstanding as of the
date of this  Agreement  except  for the  transaction  between  CADI,  the  CADI
shareholders, and James DeVico, Jr.;

          (h) increased the compensation of or paid any bonuses to any employees
or  contributed  to any employee  benefit plan,  other than in  accordance  with
established  policies,  practices or requirements and as provided in Section 5.1
hereof;

          (i) entered into any employment,  consulting or compensation agreement
with any person or group;

          (j) entered into any collective  bargaining  agreement with any person
or group;

          (k) entered into, adopted or amended any employee benefit plan; or

          (l) entered into any agreement to do any of the foregoing.

     3.11 No Material Undisclosed Liabilities. There are no material liabilities
or obligations of CADI of any nature, whether absolute, accrued,  contingent, or
otherwise, other than:

          (a) the  liabilities and  obligations  that are reflected,  accrued or
reserved  against  on the  CADI  Financial  Statements,  or  referred  to in the
footnotes to the CADI Financial Statements or incurred in the ordinary course of
business and consistent with past practices since September 30, 1996; or

          (b)  liabilities  and  obligations  which in the  aggregate  would not
result in a CADI Material Adverse Effect.

     3.12 Tax Returns;  Taxes. CADI has duly filed all U.S. federal and material
state, county, local and foreign tax returns and reports required to be filed by
it,  including  those with respect to income,  payroll,  property,  withholding,
social security,  unemployment,  franchise,  excise and sales taxes and all such
returns and reports are  correct in all  material  respects;  has either paid in
full all taxes that have become due as reflected on any return or report and any
interest and penalties with respect thereto or has fully accrued on its books or
have  established  adequate  reserves for all taxes payable but not yet due; and
has made cash deposits with appropriate  governmental  authorities  representing
estimated payments of taxes, including income taxes and employee withholding tax
obligations. No extension or waiver of any statute of limitations or time within
which to file any return has been  granted to or  requested by CADI with respect
to any tax.  No  unsatisfied  deficiency,  delinquency  or default  for any tax,





                                       -8-

<PAGE>



assessment or governmental charge has been claimed, proposed or assessed against
CADI,  nor has CADI  received  notice  of any such  deficiency,  delinquency  or
default.  CADI has no material tax liabilities other than those reflected on the
CADI Financial  Statements and those arising in the ordinary  course of business
since the date  thereof.  CADI will make  available  to MEDY true,  complete and
correct  copies of CADI's  consolidated  U.S.  federal  tax returns for the last
three years and make available such other tax returns  requested by MEDY.  There
is no  dispute  or  claim  concerning  any tax  liability  of CADI or any of its
subsidiaries  either:  (a) raised by any taxing authority in writing;  (b) as to
which CADI has received notice  concerning a potential audit of any return filed
by CADI;  and (c)  there is no  outstanding  audit or  pending  audit of any tax
return filed by CADI.

     3.13  Material  Contracts.  CADI has  furnished  or made  available to MEDY
accurate  and  complete  copies of the Material  Contracts  (as defined  herein)
applicable to CADI. Except as set forth on Schedule 3.13, there is not under any
of the Material  Contracts any existing  breach,  default or event of default by
CADI nor event  that with  notice or lapse of time or both  would  constitute  a
breach,  default or event of default by CADI other than  breaches,  defaults  or
events of default which would not have a CADI Material  Adverse  Effect nor does
CADI know of, and CADI has not received  notice of, or made a claim with respect
to, any breach or default by any other party thereto  which would,  severally or
in the aggregate,  have a CADI Material Adverse Effect. As used herein, the term
"Material  Contracts"  shall mean all  contracts  and  agreements  providing for
expenditures or commitments by CADI in excess of $10,000 over not more than a 12
month period.

     3.14  Litigation  and  Government  Claims.  Except as disclosed in the CADI
Information,  there  is  no  pending  suit,  claim,  action  or  litigation,  or
administrative, arbitration or other proceeding or governmental investigation or
inquiry  against CADI to which its businesses or assets are subject which would,
severally  or in the  aggregate,  reasonably  be  expected  to  result in a CADI
Material  Adverse  Effect.  To the knowledge of CADI, and except as disclosed in
the CADI Information,  there are no such proceedings  threatened or contemplated
which would, severally or in the aggregate, have a CADI Material Adverse Effect.
CADI is not subject to any judgment,  decree,  injunction,  rule or order of any
court, or, to the knowledge of CADI, any governmental  restriction applicable to
CADI which is reasonably  likely (i) to have a CADI Material  Adverse  Effect or
(ii) to cause a material limitation on MEDY's ability to operate the business of
CADI (as it is currently operated) after the Closing.

     3.15 Compliance With Laws. CADI has all material authorizations, approvals,
licenses  and orders to carry on its business as it is now being  conducted,  to
own or hold under lease the  properties  and assets it owns or holds under lease
and to perform all of its  obligations  under the  agreements  to which its is a
party, except for instances which would not have a CADI Material Adverse Effect.
CADI  has  been  and is,  to the  knowledge  of  CADI,  in  compliance  with all





                                       -9-

<PAGE>



applicable  laws  (including   those   referenced  in  the  CADI   Information),
regulations and administrative  orders of any country,  state or municipality or
of any  subdivision  of any thereof to which its business and its  employment of
labor or its use or occupancy of properties or any part hereof are subject,  the
violation of which would have a CADI Material Adverse Effect.

     3.16 Employee  Benefit Plans.  Each employee  benefit plan, as such term is
defined in Section 3(3) of the Employee  Retirement Income Security Act of 1974,
as amended  ("ERISA"),  of CADI  (collectively the "Employee Plans") complies in
all material respects with all applicable requirements of ERISA and the Internal
Revenue Code of 1986, as amended (the "Code"),  and other  applicable laws. None
of the Employee  Plans is an employee  pension  benefit plan or a  multiemployer
plan, as such terms are defined in ERISA. Neither CADI nor any of its directors,
officers, employees or agents has, with respect to any Employee Plan, engaged in
any "prohibited  transaction," as such term is defined in the Code or ERISA, nor
has any Employee Plan engaged in such prohibited  transaction which could result
in any  taxes  or  penalties  or  other  prohibited  transactions,  which in the
aggregate  could have a CADI Material  Adverse  Effect.  All Employee  Plans are
described in Schedule 3.17.

     3.17 Employment Agreements; Labor Relations.

          (a)  Schedule  3.17 sets forth a  complete  and  accurate  list of all
material employee benefit or compensation plans,  agreements and arrangements to
which  CADI  is  a  party,  including  without  limitation  (i)  all  severance,
employment,  consulting or similar contracts,  (ii) all material  agreements and
contracts  with "change of control"  provisions or similar  provisions and (iii)
all indemnification agreements or arrangements with directors or officers.

          (b)  CADI is in  compliance  in all  material  respects  with all laws
(including  Federal  and  state  laws)  respecting   employment  and  employment
practices,  terms and  conditions  of  employment,  wages and hours,  and is not
engaged  in  any  unfair  labor  or  unlawful  employment  practice.  To  CADI's
knowledge,  there  is no  unlawful  employment  practice  discrimination  charge
pending before the EEOC or EEOC recognized  state  "referral  agency." Except as
would not have a CADI Material Adverse Effect, there is no unfair labor practice
charge or complaint against CADI pending before the National Labor Review Board.
There is no labor strike, dispute,  slowdown or stoppage actually pending or, to
the knowledge of CADI,  threatened against or involving or affecting CADI and no
National Labor Review Board  representation  question  exists  respecting  their
respective  employees.  Except as would not have a CADI Material Adverse Effect,
no grievances or arbitration proceeding is pending and no written claim therefor
exists. There is no collective bargaining agreement that is binding on CADI.





                                      -10-

<PAGE>



     3.18 Intellectual Property. CADI owns or has valid, binding and enforceable
rights to use all material  patents,  trademarks,  trade names,  service  marks,
service names, copyrights, applications therefor and licenses or other rights in
respect  thereof  ("Intellectual  Property")  used or held for use in connection
with the business of CADI, without any known conflict with the rights of others,
except for such conflicts as do not have a CADI Material  Adverse  Effect.  CADI
has not received any notice from any other person  pertaining to or  challenging
the  right  of CADI to use  any  Intellectual  Property  or any  trade  secrets,
proprietary information, inventions, know-how, processes and procedures owned or
used or  licensed  to CADI,  except  with  respect  to rights the loss of which,
individually or in the aggregate, would not have a CADI Material Adverse Effect.

     3.19 Title to Properties and Related Matters.

          (a) CADI has good and marketable title to or valid leasehold interests
in  their  respective  properties  (the  "Real  Estate")  reflected  on the CADI
Financial  Statements  or acquired  after the date thereof  (other than personal
properties  sold or otherwise  disposed of in the ordinary  course of business),
and all of such  properties  and all assets  purchased by CADI since the date of
the most recent CADI Financial  Statements are free and clear of any lien, claim
or  encumbrance,  except as reflected in the CADI Financial  Statements or notes
thereto and except for:

             (i) liens for taxes,  assessments or other governmental charges not
yet due and payable or the  validity of which are being  contested in good faith
by appropriate proceedings;

             (ii) statutory  liens  incurred in the ordinary  course of business
that are not yet due and payable or the validity of which are being contested in
good faith by appropriate proceedings;

             (iii)  landlord  liens  contained in leases entered in the ordinary
course of business; and

             (iv) other liens, claims or encumbrances that, in the aggregate, do
not  materially  subtract from the value of, or materially  interfere  with, the
present use of, the Real Estate.

Except  for  those  assets  acquired  since  the  date of the most  recent  CADI
Financial  Statements,  all  properties  and  assets  material  to  the  present
operations  of CADI are owned or leased  by CADI and are  reflected  on the CADI
Financial  Statements and notes thereto in the manner and to the extent required
by generally accepted accounting principles.





                                      -11-

<PAGE>



          (b)(i)  Applicable  zoning  ordinances  permit the operation of CADI's
business at the Real Estate;  (ii) CADI has all easements and rights,  including
easements for all utilities,  services,  roadways and other means of ingress and
egress,  necessary  to operate  CADI's  business at the Real  Estate;  and (iii)
neither  the  whole  nor any  portion  of the Real  Estate  has been  condemned,
requisitioned or otherwise taken by any public  authority,  and no notice of any
such condemnation,  requisition or taking has been received; except in each case
where the failure of such  provisions  to be true and  correct  would not have a
CADI Material  Adverse Effect.  No such  condemnation,  requisition or taking is
threatened or contemplated to CADI's knowledge,  and there are no pending public
improvements  which  may  result in  special  assessments  against  or which may
otherwise  materially and adversely affect the Real Estate.  To the knowledge of
CADI,  the Real Estate has not been used for  deposit or  disposal of  hazardous
wastes or  substances  in  violation  of any past or current law in any material
respect  and there is no  material  liability  under  past or  current  law with
respect to any  hazardous  wastes or  substances  which have been  deposited  or
disposed of on or in the Real Estate.

          (c) CADI has  received no notice of, and has no actual  knowledge  of,
any  material  violation of any zoning,  building,  health,  fire,  water use or
similar statute,  ordinance, law, regulation or code in connection with the Real
Estate.

          (d)  To  CADI's   knowledge,   no  hazardous  or  toxic  material  (as
hereinafter  defined) exists in any structure  located on, or exists on or under
the surface of, the Real Estate which is, in any case, in material  violation of
applicable  environmental  law. For purposes of this  Agreement,  "hazardous  or
toxic  material"  shall  mean  waste,  substance,   materials,   smoke,  gas  or
particulate  matter  designated  as  hazardous,  toxic or  dangerous  under  any
applicable  environmental  law. For purposes of this  Agreement,  "environmental
law" shall include the  Comprehensive  Environmental  Response  Compensation and
Liability  Act, the Clean Air Act, the Clean Water Act and any other  applicable
federal, state or local environmental,  health or safety law, rule or regulation
relating to or imposing liability or standards  concerning or in connection with
hazardous,  toxic  or  dangerous  waste,  substance,  materials,  smoke,  gas or
particulate matter.

     3.20 Tax Representations.

          (a)  The  fair  market  value  of the  MEDY  Common  Stock  and  other
consideration  received by each CADI shareholder will be approximately  equal to
the fair market value of the CADI Common Stock surrendered in the Merger.

          (b) There is no plan or intention by any of the  shareholders  of CADI
to sell,  exchange,  or  otherwise  dispose of a number of shares of MEDY Common
Stock  received  in the  transaction  that would  reduce the CADI  shareholders'
ownership of MEDY Common Stock to a number of shares  having a value,  as of the




                                      -12-

<PAGE>



date of the  transaction,  of less than 50% of the value of all of the  formerly
outstanding stock of CADI as of the same date.

          (c) Following the transaction, CADI will hold at least 90% of the fair
market  value of its net assets and at least 70% of the fair market value of its
gross  assets and at least 90% of the fair market  value of Merger  Subsidiary's
net  assets  and at least 70% of the fair  market  value of Merger  Subsidiary's
gross assets held immediately prior to the transaction.

          (d) CADI has no plan or  intention to issue  additional  shares of its
stock that would  result in MEDY  losing  control of CADI  within the meaning of
ss.368(c) of the Code.

          (e)  Following  the  transaction,  CADI  will  continue  its  historic
business  or use a  significant  portion of its  historic  business  assets in a
business.

          (f) MEDY, Merger  Subsidiary,  CADI, and the shareholders of CADI will
pay  their  respective  expenses,  if  any,  incurred  in  connection  with  the
transaction.

          (g) There is no intercorporate  indebtedness existing between MEDY and
CADI or between Merger Subsidiary and CADI that was issued, acquired, or will be
settled at a discount.

          (h) In the  transaction,  shares  of CADI  Common  Stock  representing
control of CADI, as defined in ss.368(c) of the Code,  will be exchanged  solely
for voting stock of MEDY and the other consideration described herein.

          (i) At the time of the transaction, CADI will not have outstanding any
warrants,  options,  convertible securities, or any other type of right pursuant
to which any person could acquire stock in CADI that, if exercised or converted,
would affect MEDY's  acquisition  or retention of control of CADI, as defined in
ss.368(c) of the Code.

          (j) Neither MEDY nor Merger  Subsidiary  is an  investment  company as
defined in ss.368(a)(2)(f)(iii) and (iv) of the Code

          (k) On the  date of the  transaction,  the  fair  market  value of the
assets  of CADI  will  exceed  the sum of its  liabilities,  plus the  amount of
liabilities, if any, to which the assets are subject.

          (l) CADI is not  under  the  jurisdiction  of a court in a title 11 or
similar case within the meaning of ss.368(a)(3)(A) of the Code.





                                      -13-

<PAGE>



     3.21 No Brokers and Finders.  None of CADI or, to CADI's knowledge,  any of
its  officers,  directors  and  employees  has  employed  any broker,  finder or
investment  bank or incurred any  liability  for any  investment  banking  fees,
financial advisory fees,  brokerage fees or finders' fees in connection with the
transactions  contemplated hereby. CADI is not aware of any claim for payment of
any finder's  fees,  brokerage or agent's  commissions or other like payments in
connection with the negotiations  leading to this Agreement or the completion of
the transactions contemplated hereby.

                                    ARTICLE 4

                     Representations and Warranties of MEDY
                            and the Merger Subsidiary
                            -------------------------

     MEDY and the  Merger  Subsidiary  represent  and  warrant  to CADI that the
statements  contained in Article 4 are true and correct in all material respects
and will be true and  correct as of the  Closing  Date and the  Effective  Date,
except as set forth in the schedules  attached hereto. As used in this Article 4
and  elsewhere  in  this  Agreement,   the  phrase  "to  MEDY's  or  the  Merger
Subsidiary's  knowledge"  or  "to  MEDY's  or  the  Merger  Subsidiary's  actual
knowledge" shall mean to the actual knowledge of Van A. Horsley.

     4.1 Organization and Good Standing.  Each of MEDY and the Merger Subsidiary
is duly organized,  validly  existing and in good standing under the laws of the
jurisdiction of its  incorporation or organization.  All shares of capital stock
or other equity  interests of each of the Merger  Subsidiary  are owned by MEDY,
free and clear of all material liens, encumbrances, equities or claims.

     4.2  Foreign  Qualification.  MEDY  and  the  Merger  Subsidiary  are  duly
qualified  or  licensed  to do  business  and are in good  standing as a foreign
corporation in every  jurisdiction  where the failure so to qualify would have a
material  adverse effect (a "MEDY Material Adverse Effect") on (a) the business,
operations,  assets or  financial  condition  of MEDY and the Merger  Subsidiary
taken as a whole or (b) the  validity  or  enforceability  of, or the ability of
MEDY to perform its obligations under, this Agreement.

     4.3 Corporate Power and Authority.  MEDY and the Merger Subsidiary have the
corporate  power and  authority  and all  material  licenses and permits to own,
lease and operate their  respective  properties and assets and to carry on their
respective businesses as currently being conducted.  Each of MEDY and the Merger
Subsidiary  has the  corporate  power and  authority to execute and deliver this
Agreement and to perform its  obligations  under this  Agreement and to complete
the Merger.  The  execution,  delivery  and  performance  by MEDY and the Merger
Subsidiary of this Agreement has been duly authorized by all necessary corporate
action.





                                      -14-

<PAGE>



     4.4 Binding Effect.  This Agreement has been duly executed and delivered by
MEDY and the Merger Subsidiary and is the legal,  valid and binding  obligations
of MEDY and the Merger  Subsidiary,  enforceable  in  accordance  with its terms
except that:

          (a) enforceability  may be limited by bankruptcy,  insolvency or other
similar laws affecting creditors' rights;

          (b) the availability of equitable remedies may be limited by equitable
principles of general applicability; and

          (c) rights to  indemnification  may be limited  by  considerations  of
public policy.

     4.5 Absence of  Restrictions  and Conflicts.  The  execution,  delivery and
performance  of  this  Agreement  and  the  completion  of the  Merger  and  the
fulfillment of and compliance with the terms and conditions of this Agreement do
not and will  not,  with the  passing  of time or the  giving of notice or both,
violate or conflict with, constitute a breach of or default under, result in the
loss of any material benefit under, or permit the acceleration of any obligation
under,  (i) any term or provision of the Articles of  Incorporation or Bylaws of
MEDY or the Merger Subsidiary,  (ii) any "MEDY Material Contract" (as defined in
Section 4.12), (iii) any judgment,  decree or order of any court or governmental
authority  or agency to which  MEDY or the  Merger  Subsidiary  is a party or by
which MEDY or the Merger  Subsidiary  or any of their  respective  properties is
bound,  or (iv) any statute,  law,  regulation or rule applicable to MEDY or the
Merger Subsidiary other than such violations, conflicts, breaches or defaults as
would not have a MEDY  Material  Adverse  Effect.  Except  for the filing of the
Articles of Merger with the Secretary of State of  California,  compliance  with
the  applicable  requirements  of the  Securities  Act,  the  Exchange  Act  and
applicable state securities laws, no consent,  approval,  order or authorization
of, or  registration,  declaration  or filing with, any  governmental  agency or
public or regulatory unit, agency, body or authority with respect to MEDY or the
Merger  Subsidiary is required in  connection  with the  execution,  delivery or
performance  of this  Agreement by MEDY or the  completion  of the  transactions
contemplated hereby.

     4.6 Capitalization of MEDY.

          (a) The authorized capital stock of MEDY consists of 15,000,000 shares
of MEDY Common Stock,  and 5,000,000  shares of preferred  stock. As of the date
hereof,  there  are (i)  approximately  7,643,233  shares of MEDY  Common  Stock
outstanding,  and no shares of preferred stock outstanding; and (ii) at June 30,
1997,  1,420,537  shares  were  reserved  for  issuance  upon  the  exercise  of
outstanding  options  under MEDY's  Stock  Option Plans (the "MEDY  Options" and
"MEDY Option Plans," respectively).  All of the issued and outstanding shares of
MEDY Common  Stock have been duly  authorized  and validly  issued and are fully
paid and nonassessable.




                                      -15-

<PAGE>




          (b) All of the issued and outstanding shares of MEDY Common Stock have
been duly  authorized and validly issued and are fully paid,  nonassessable  and
free of preemptive rights.

          (c) The shares of MEDY Common Stock to be issued in the Merger will be
duly authorized and validly issued and will be fully paid,  nonassessable shares
of MEDY Common Stock free of preemptive rights.

          (d) To  MEDY's  knowledge,  there are no  voting  trusts,  stockholder
agreements or other voting arrangements by the stockholders of MEDY.

          (e)  Except  as  set  forth  in  subsection  (a)  above,  there  is no
outstanding  subscription,   contract,  convertible  or  exchangeable  security,
option,  warrant,  call or other right  obligating  MEDY or its  subsidiaries to
issue,  sell,  exchange,  or  otherwise  dispose of, or to  purchase,  redeem or
otherwise  acquire,  shares of, or securities  convertible  into or exchangeable
for, capital stock of MEDY.

     4.7 MEDY SEC Reports.  MEDY has made  available  to CADI (i) MEDY's  Annual
Reports on Form 10-KSB for the year ended  September  30,  1996,  including  all
exhibits filed thereto and items incorporated therein by reference,  (ii) MEDY's
Quarterly  Reports on Form 10-QSB for the quarters  ended  December 31, 1996 and
March  31  and  June  30,  1997,   including  all  exhibits  thereto  and  items
incorporated  therein by reference,  (iii) and all other reports or registration
statements (as amended or supplemented prior to the date hereof),  filed by MEDY
with the SEC since  October 1, 1996,  including  all exhibits  thereto and items
incorporated  therein by reference  (items (i) through (iv) being referred to as
the "MEDY SEC Reports").  As of their respective dates, MEDY SEC Reports did not
contain any untrue statement of a material fact or omit to state a material fact
required to be stated  therein or necessary to make the statements  therein,  in
light of the  circumstances  under which they were made, not  misleading.  Since
October 1, 1994,  MEDY has filed all material forms (and necessary  amendments),
reports and  documents  with the SEC  required to be filed by it pursuant to the
federal  securities laws and the SEC rules and regulations  thereunder,  each of
which complied as to form, at the time such form,  report or document was filed,
in all material respects with the applicable  requirements of the Securities Act
and the Exchange Act and the applicable rules and regulations thereunder.

     4.8 Financial  Statements  and Records of MEDY.  MEDY has made available to
CADI true,  correct and complete  copies of the following  financial  statements
(the "MEDY Financial Statements"):

          (a) the  consolidated  balance  sheets  of MEDY  and its  consolidated
subsidiaries  as of  September  30, 1996,  and the  consolidated  statements  of
income,  stockholders'  equity and cash flows for the fiscal  years then  ended,
including the notes  thereto,  in each case examined by and  accompanied  by the
report of MEDY's independent certified public accountants as of the date of such
financial statements; and




                                      -16-

<PAGE>


          (b) the unaudited balance sheet of MEDY as of June 30, 1997 (the "MEDY
Balance Sheet"),  with any notes thereto, and the related unaudited statement of
income for the fiscal  quarter  then ended  (collectively,  the "MEDY  Quarterly
Statements").

     The MEDY Financial Statements present fairly, in all material respects, the
financial position of MEDY as of the dates thereof and the results of operations
and changes in financial  position  thereof for the periods then ended,  in each
case in conformity with generally accepted accounting  principles,  consistently
applied,  except as noted therein.  Since September 30, 1996,  there has been no
change in accounting principles applicable to, or methods of accounting utilized
by,  MEDY,  except  as noted in the MEDY  Financial  Statements.  The  books and
records  of MEDY have  been and are being  maintained  in  accordance  with good
business practice, reflect only valid transactions,  are complete and correct in
all material respects, and present fairly in all material respects the basis for
the  financial  position and results of operations of MEDY set forth in the MEDY
Financial Statements.

     4.9 Absence of Certain  Changes.  Since the date of the MEDY Balance Sheet,
MEDY has not,  except  as  otherwise  set  forth in the MEDY SEC  Reports  or on
Schedule 4.9:

          (a) suffered any adverse change in the business,  operations,  assets,
or  financial  condition  except  for such  changes  that  would not have a MEDY
Material Adverse Effect;

          (b)  suffered  any material  damage or  destruction  to or loss of the
assets of MEDY or the Merger  Subsidiary,  whether or not covered by  insurance,
which  property or assets are material to the operations or business of MEDY and
its subsidiaries taken as a whole;

          (c) settled,  forgiven,  compromised,  canceled,  released,  waived or
permitted  to lapse any  material  rights or claims  other than in the  ordinary
course of business;

          (d) entered into or terminated any material  agreement,  commitment or
transaction,  or agreed or made any  changes in material  leases or  agreements,
other than renewals or extensions thereof and leases,  agreements,  transactions
and commitments entered into or terminated in the ordinary course of business;

          (e)  written  up,  written  down or written  off the book value of any
material amount of assets other than in the ordinary course of business;





                                      -17-

<PAGE>



          (f)  declared,   paid  or  set  aside  for  payment  any  dividend  or
distribution with respect to MEDY's capital stock;

          (g) redeemed,  purchased or otherwise  acquired,  or sold,  granted or
otherwise  disposed of,  directly or indirectly,  any of MEDY's capital stock or
securities  (other than shares  issued upon exercise of the MEDY Options) or any
rights to acquire such capital stock or securities,  or agreed to changes in the
terms  and  conditions  of any such  rights  outstanding  as of the date of this
Agreement  provided,  however,  nothing herein is intended or shall prevent MEDY
from  issuing MEDY  Options to its  employees or in lieu of royalty  payments or
license fees substantially in accordance with MEDY's past practices or which are
currently under contract;

          (h) increased the compensation of or paid any bonuses to any employees
or  contributed  to any employee  benefit plan,  other than in  accordance  with
established  policies,  practices or requirements and as provided in Section 5.2
hereof;

          (i) entered into any employment,  consulting or compensation agreement
with any person or group,  except  for  agreements  which  would not have a MEDY
Material Adverse Effect;

          (j) entered into any collective  bargaining  agreement with any person
or group;

          (k) entered into, adopted or amended any employee benefit plan; or

          (l) entered into any agreement to do any of the foregoing.

     4.10 No Material Undisclosed Liabilities. There are no material liabilities
or obligations of MEDY and its consolidated  subsidiaries of any nature, whether
absolute, accrued, contingent, or otherwise, other than:

          (a)  liabilities  and  obligations  that  are  reflected,  accrued  or
reserved  against on the MEDY Balance  Sheet or referred to in the  footnotes to
the MEDY  Balance  Sheet,  or incurred in the  ordinary  course of business  and
consistent with past practices since the date of the MEDY Balance Sheet; or

          (b)  liabilities  and  obligations  which in the  aggregate  would not
result in a MEDY Material Effect.

     4.11 Tax Returns;  Taxes.  Each of MEDY and the Merger Subsidiary have duly
filed all U.S. federal and material state, county, local and foreign tax returns
and reports  required to be filed by it, including those with respect to income,
payroll, property, withholding, social security, unemployment, franchise, excise
and sales taxes and all such  returns  and  reports are correct in all  material





                                      -18-

<PAGE>



respects;  have either paid in full all taxes that have become due as  reflected
on any return or report and any interest and penalties  with respect  thereto or
have fully accrued on its books or have  established  adequate  reserves for all
taxes  payable but not yet due;  and have made cash  deposits  with  appropriate
governmental  authorities  representing  estimated payments of taxes,  including
income taxes and employee withholding tax obligations. No extension or waiver of
any  statute of  limitations  or time  within  which to file any return has been
granted to or  requested  by MEDY or the Merger  Subsidiary  with respect to any
tax. No unsatisfied  deficiency,  delinquency or default for any tax, assessment
or governmental  charge has been claimed,  proposed or assessed  against MEDY or
the Merger Subsidiary,  nor has MEDY or the Merger Subsidiary received notice of
any such deficiency, delinquency or default. MEDY and the Merger Subsidiary have
no material tax liabilities other than those reflected on the MEDY Balance Sheet
and those  arising in the ordinary  course of business  since the date  thereof.
MEDY will make  available to CADI true,  complete  and correct  copies of MEDY's
consolidated U.S. federal tax returns for the last five years and make available
such  other  tax  returns  requested  by  CADI.  There  is no  dispute  or claim
concerning any material tax liability of MEDY or any of its subsidiaries either:
(a) raised by any taxing  authority  in writing;  (b) as to which MEDY or any of
its subsidiaries has received notice  concerning a potential audit of any return
filed by MEDY; and (c) there is no outstanding audit or pending audit of any tax
return filed by MEDY.

     4.12  Material  Contracts.  MEDY has  furnished  or made  available to CADI
accurate and complete copies of the MEDY Material  Contracts (as defined herein)
applicable to MEDY or the Merger Subsidiary.  There is not under any of the MEDY
Material  Contracts any existing breach,  default or event of default by MEDY or
the Merger  Subsidiary nor event that with notice or lapse of time or both would
constitute  a  breach,  default  or  event  of  default  by MEDY  or the  Merger
Subsidiary  other than  breaches,  defaults or events of default which would not
have a MEDY  Material  Adverse  Effect  nor does MEDY know of,  and MEDY has not
received  notice of, or made a claim with  respect  to, any breach or default by
any other party thereto which would, severally or in the aggregate,  have a MEDY
Material  Adverse  Effect.  As used herein,  the term "MEDY Material  Contracts"
shall mean all  contracts  and  agreements  filed,  or required to be filed,  as
exhibits to MEDY's Annual Report on Form 10-KSB for the year ended September 30,
1996 and any  contracts  and  agreements  entered into since  September 30, 1996
which would be required to be filed or incorporated  by reference  therein as an
exhibit to MEDY's Annual Report on Form 10-KSB for the year ending September 30,
1997,  and  all  contracts  entered  into in the  ordinary  course  of  business
providing for financial obligations of MEDY of more than $10,000 over a 12 month
period  (excluding  purchase  orders  entered  into in the  ordinary  course  of
business).

     4.13 Litigation and Government Claims.  Except as disclosed in the MEDY SEC
Reports,   there  is  no  pending  suit,   claim,   action  or  litigation,   or
administrative, arbitration or other proceeding or governmental investigation or
inquiry  against  MEDY or the Merger  Subsidiary  to which their  businesses  or
assets are subject  which would,  severally or in the  aggregate,  reasonably be





                                      -19-

<PAGE>



expected to result in a MEDY Material Adverse Effect.  To the knowledge of MEDY,
there are no such proceedings  threatened or contemplated which would, severally
or in the aggregate,  have a MEDY Material Adverse Effect.  Neither MEDY nor the
Merger Subsidiary is subject to any judgment, decree, injunction,  rule or order
of any  court,  or,  to the  knowledge  of MEDY,  any  governmental  restriction
applicable to MEDY or the Merger Subsidiary which is reasonably likely to have a
MEDY Material Adverse Effect.

     4.14  Compliance  with Laws.  MEDY and the Merger  Subsidiary each have all
material  authorizations,  approvals,  licenses  and  orders  to  carry on their
respective  businesses  as they are now being  conducted,  to own or hold  under
lease the  properties  or assets they own or hold under lease and to perform all
of their obligations under the agreements to which they are a party,  except for
instances  which would not have a MEDY  Material  Adverse  Effect.  MEDY and the
Merger  Subsidiary  have been and are, to the  knowledge of MEDY,  in compliance
with all applicable laws (including  those  referenced in the MEDY SEC Reports),
regulations and administrative  orders of any country,  state or municipality or
any  subdivision of any thereof to which their  respective  businesses and their
employment  of labor or their use or occupancy of  properties or any part hereof
are subject, the violation of which would have a MEDY Material Adverse Effect.

     4.15 MEDY Employee Benefit Plans.  Each employee benefit plan, as such term
is  defined  in  Section  3(3) of  ERISA,  of MEDY  and  the  Merger  Subsidiary
(collectively  the "MEDY Employee Plans") complies in all material respects with
all applicable  requirements of ERISA,  the Code and other applicable laws. None
of  the  MEDY  Employee  Plans  is  an  employee   pension  benefit  plan  or  a
multiemployer  plan,  as such terms are defined in ERISA.  Neither  MEDY nor the
Merger Subsidiary nor any of their respective directors,  officers, employees or
agents has, with respect to any MEDY Employee Plan,  engaged in any  "prohibited
transaction,"  as such term is  defined  in the Code or ERISA,  nor has any MEDY
Employee Plan engaged in such prohibited  transaction  which could result in any
taxes or  penalties or other  prohibited  transactions,  which in the  aggregate
could have a MEDY Material Adverse Effect.

     4.16 Employment  Agreements;  Labor Relations.  Each of MEDY and the Merger
Subsidiary is in compliance  in all material  respects with all laws  (including
Federal and state laws) respecting  employment and employment  practices,  terms
and conditions of employment,  wages and hours, and is not engaged in any unfair
labor or unlawful employment practice.  There is no unlawful employment practice
discrimination charge pending before the EEOC or EEOC recognized state "referral
agency." Except as would not have a MEDY Material  Adverse  Effect,  there is no
unfair labor practice charge or complaint  against MEDY or the Merger Subsidiary
pending  before the  National  Labor  Review  Board.  There is no labor  strike,
dispute,  slowdown or stoppage  actually  pending or, to the  knowledge of MEDY,
threatened  against or involving or affecting MEDY or the Merger  Subsidiary and





                                      -20-

<PAGE>



no National Labor Review Board  representation  question exists respecting their
respective  employees.  Except as would not have a MEDY Material Adverse Effect,
no grievances or arbitration proceeding is pending and no written claim therefor
exists.  There is no collective  bargaining agreement that is binding on MEDY or
the Merger Subsidiary.

     4.17  Intellectual  Property.  MEDY and the Merger  Subsidiary  own or have
valid,  binding and enforceable rights to use all material patents,  trademarks,
trade names, service marks, service names, copyrights, applications therefor and
licenses or other rights in respect thereof ("MEDY Intellectual  Property") used
or  held  for  use in  connection  with  the  business  of  MEDY  or the  Merger
Subsidiary,  without any known  conflict  with the rights of others,  except for
such conflicts as do not have a MEDY Material  Adverse Effect.  Neither MEDY nor
the Merger  Subsidiary has received any notice from any other person  pertaining
to or  challenging  the right of MEDY or the Merger  Subsidiary  to use any MEDY
Intellectual Property or any trade secrets, proprietary information, inventions,
know-how,  processes  and  procedures  owned or used or  licensed to MEDY or the
Merger Subsidiary, except with respect to rights the loss of which, individually
or in the aggregate, would not have a MEDY Material Adverse Effect.

     4.18  Nasdaq  Fees.  MEDY has paid all fees due and  owing to  Nasdaq  with
respect to MEDY Common Stock on the SmallCap Market,  and MEDY will pay all such
fees  arising  out of the  issuance  of any  shares  of  MEDY  common  stock  in
connection with transactions contemplated hereby.

     4.19 Tax Representations.

          (a) Following the transaction, CADI will hold at least 90% of the fair
market  value of its net assets and at least 70% of the fair market value of its
gross  assets and at least 90% of the fair market  value of Merger  Subsidiary's
net  assets  and at least 70% of the fair  market  value of Merger  Subsidiary's
gross assets held immediately prior to the transaction.

          (b)  Prior to the  transaction,  MEDY  will be in  control  of  Merger
Subsidiary within the meaning of ss.368(c) of the Code.

          (c) MEDY has no plan or intention to reacquire any of its stock issued
in the transaction.

          (d) MEDY has no plan or  intention to  liquidate  CADI;  to merge CADI
with or into another  corporation;  to sell or otherwise dispose of the stock of
CADI except for  transfers of stock to  corporations  controlled  by MEDY; or to
cause  CADI to sell or  otherwise  dispose of any of its assets or of any of the
assets  acquired from Merger  Subsidiary,  except for  dispositions  made in the
ordinary  course of business or transfers of assets to a corporation  controlled
by CADI.



                                      -21-

<PAGE>


          (e) Merger  Subsidiary  will have no liabilities  assumed by CADI, and
will not transfer to CADI any assets subject to liabilities, in the transaction.

          (f)  Following  the  transaction,  CADI  will  continue  its  historic
business  or use a  significant  portion of its  historic  business  assets in a
business.

          (g) MEDY, Merger  Subsidiary,  CADI, and the shareholders of CADI will
pay  their  respective  expenses,  if  any,  incurred  in  connection  with  the
transaction.

          (h) There is no intercorporate  indebtedness existing between MEDY and
CADI or between Merger Subsidiary and CADI that was issued, acquired, or will be
settled at a discount.

          (i) In the  transaction,  shares  of CADI  Common  Stock  representing
control of CADI, as defined in ss.368(c) of the Code,  will be exchanged  solely
for voting stock of MEDY except as otherwise described herein.

          (j) MEDY does not own,  nor has it owned  during the past five  years,
any shares of the stock of CADI.

          (k) Neither MEDY nor Merger  Subsidiary  is an  investment  company as
defined in ss.368(a)(2)(f)(iii) and (iv) of the Code.

     4.20 Title to Properties and Related Matters.

          (a) MEDY has good and marketable title to or valid leasehold interests
in  their  respective  properties  (the  "Real  Estate")  reflected  on the MEDY
Financial  Statements  or acquired  after the date thereof  (other than personal
properties  sold or otherwise  disposed of in the ordinary  course of business),
and all of such  properties  and all assets  purchased by MEDY since the date of
the most recent MEDY Financial  Statements are free and clear of any lien, claim
or  encumbrance,  except as reflected in the MEDY Financial  Statements or notes
thereto and except for:

             (i) liens for taxes,  assessments or other governmental charges not
yet due and payable or the  validity of which are being  contested in good faith
by appropriate proceedings;





                                      -22-

<PAGE>



             (ii) statutory  liens  incurred in the ordinary  course of business
that are not yet due and payable or the validity of which are being contested in
good faith by appropriate proceedings;

             (iii)  landlord  liens  contained in leases entered in the ordinary
course of business; and

             (iv) other liens, claims or encumbrances that, in the aggregate, do
not  materially  subtract from the value of, or materially  interfere  with, the
present use of, the Real Estate.

Except for those assets  acquired since the date of the MEDY Balance Sheet,  all
properties  and assets  material to the present  operations of MEDY are owned or
leased by MEDY and are  reflected  on the MEDY  Financial  Statements  and notes
thereto  in  the  manner  and to  the  extent  required  by  generally  accepted
accounting principles.

          (b) (i) Applicable  zoning  ordinances  permit the operation of MEDY's
business at the Real Estate;  (ii) MEDY has all easements and rights,  including
easements for all utilities,  services,  roadways and other means of ingress and
egress,  necessary to operate MEDY's business at the Real Estate; (iii) the Real
Estate is not located within a flood plain or lakeshore erosion hazard area; and
(iv)  neither the whole nor any  portion of the Real Estate has been  condemned,
requisitioned or otherwise taken by any public  authority,  and no notice of any
such condemnation,  requisition or taking has been received; except in each case
where the failure of such  provisions  to be true and  correct  would not have a
MEDY Material  Adverse Effect.  No such  condemnation,  requisition or taking is
threatened or contemplated to MEDY's knowledge,  and there are no pending public
improvements  which  may  result in  special  assessments  against  or which may
otherwise  materially and adversely affect the Real Estate.  To the knowledge of
MEDY,  the Real Estate has not been used for  deposit or  disposal of  hazardous
wastes or  substances  in  violation  of any past or current law in any material
respect  and there is no  material  liability  under  past or  current  law with
respect to any  hazardous  wastes or  substances  which have been  deposited  or
disposed of on or in the Real Estate.

          (c) MEDY has  received no notice of, and has no actual  knowledge  of,
any  material  violation of any zoning,  building,  health,  fire,  water use or
similar statute,  ordinance, law, regulation or code in connection with the Real
Estate.

          (d)  To  MEDY's   knowledge,   no  hazardous  or  toxic  material  (as
hereinafter  defined) exists in any structure  located on, or exists on or under
the surface of, the Real Estate which is, in any case, in material  violation of
applicable  environmental  law. For purposes of this  Agreement,  "hazardous  or
toxic  material"  shall  mean  waste,  substance,   materials,   smoke,  gas  or
particulate  matter  designated  as  hazardous,  toxic or  dangerous  under  any





                                      -23-

<PAGE>



applicable  environmental  law. For purposes of this  Agreement,  "environmental
law" shall include the  Comprehensive  Environmental  Response  Compensation and
Liability  Act, the Clean Air Act, the Clean Water Act and any other  applicable
federal, state or local environmental,  health or safety law, rule or regulation
relating to or imposing liability or standards  concerning or in connection with
hazardous,  toxic  or  dangerous  waste,  substance,  materials,  smoke,  gas or
particulate matter.

     4.21 No Brokers and Finders.  None of MEDY or, to MEDY's knowledge,  any of
its  officers,  directors  and  employees  has  employed  any broker,  finder or
investment  bank or incurred any  liability  for any  investment  banking  fees,
financial advisory fees,  brokerage fees or finders' fees in connection with the
transactions  contemplated hereby. MEDY is not aware of any claim for payment of
any finder's  fees,  brokerage or agent's  commissions or other like payments in
connection with the negotiations  leading to this Agreement or the completion of
the transactions contemplated hereby.

                                    ARTICLE 5

                        Certain Covenants and Agreements
                        --------------------------------

     5.1  Conduct of Business  by CADI.  From the date  hereof to the  Effective
Date, CADI will,  except as required in connection with the Merger and the other
transactions contemplated by this Agreement and except as otherwise disclosed on
the schedules hereto or consented to in writing by MEDY:

          (a)  carry on its  business  in the  ordinary  and  regular  course in
substantially the same manner as heretofore  conducted and not engage in any new
line of business or enter into any material  agreement,  transaction or activity
or make any material  commitment except those in the ordinary and regular course
of business and not otherwise prohibited under this Section 5.1;

          (b) neither change nor amend its Articles of Incorporation or Bylaws;

          (c) not issue or sell shares of capital  stock of CADI or issue,  sell
or grant options,  warrants or rights to purchase or subscribe to, or enter into
any  arrangement  or contract with respect to the issuance or sale of any of the
capital stock of CADI or rights or obligations  convertible into or exchangeable
for any shares of the capital  stock of CADI or make any  changes (by  split-up,
combination, reorganization or otherwise) in the capital structure of CADI;

          (d) not  declare,  pay or set aside for payment any  dividend or other
distribution in respect of the capital stock or other equity  securities of CADI
and not redeem, purchase or otherwise acquire any shares of the capital stock or
other  securities  of  CADI  or  rights  or  obligations   convertible  into  or





                                      -24-

<PAGE>



exchangeable  for any shares of the capital stock or other securities of CADI or
obligations  convertible into such, or any options,  warrants or other rights to
purchase or subscribe to any of the foregoing;

          (e) not acquire or enter into any  agreement  to  acquire,  by merger,
consolidation or purchase of stock or assets, any business or entity;

          (f) use its  reasonable  efforts  to  preserve  intact  the  corporate
existence,  goodwill and business organization of CADI, to keep the officers and
employees of CADI  available to CADI and to preserve the  relationships  of CADI
with suppliers, customers and others having business relations with any of them,
except for such instances which would not have a CADI Material Adverse Effect;

          (g) [intentionally omitted.];

          (h) Not (i) enter  into,  modify or extend in any  manner the terms of
any  employment,  severance or similar  agreements  with officers and directors,
(ii) grant any increase in the  compensation  of officers or directors,  whether
now or hereafter  payable or (iii) grant any increase in the compensation of any
other  employees  except for  compensation  increases in the ordinary  course of
business and consistent  with past practice (it being  understood by the parties
hereto that for the purposes of (ii) and (iii) above  increases in  compensation
shall  include  any  increase  pursuant to any option,  bonus,  stock  purchase,
pension,  profit-sharing,  deferred  compensation,  retirement  or  other  plan,
arrangement, contract or commitment);

          (i) [intentionally omitted];

          (j) except in instances  which would not have a CADI Material  Adverse
Effect,  perform all of its  obligations  under all Material  Contracts  (except
those being  contested  in good  faith) and not enter into,  assume or amend any
contract or commitment that would be a Material Contract other than contracts to
provide services entered into in the ordinary course of business; and

          (k) except in instances  which would not have a CADI Material  Adverse
Effect, prepare and file all federal, state, local and foreign returns for taxes
and other tax reports,  filings and amendments  thereto  required to be filed by
it, and allow MEDY, at its request, to review all such returns, reports, filings
and amendments at CADI's offices prior to the filing thereof, which review shall
not interfere with the timely filing of such returns.

     In connection with the continued  operation of the business of CADI between
the date of this  Agreement  and the Effective  Date,  CADI shall confer in good
faith and on a regular and frequent  basis with one or more  representatives  of
MEDY designated in writing to report operational matters of materiality and the




                                      -25-

<PAGE>



general  status of ongoing  operations.  In addition,  during  regular  business
hours,  CADI will  allow  MEDY  employees  and  agents to be  present  at CADI's
business  locations  to  observe  the  business  and  operations  of CADI.  CADI
acknowledges  that MEDY does not and will not waive any rights it may have under
this Agreement as a result of such  consultations  nor shall MEDY be responsible
for any decisions made by CADI's  officers and directors with respect to matters
which are the subject of such consultation.

     5.2  Conduct of Business  by MEDY.  From the date  hereof to the  Effective
Date,  MEDY will,  and will cause the Merger  Subsidiary  and each of the Merger
Subsidiary  to, except as required in  connection  with the Merger and the other
transactions contemplated by this Agreement and except as otherwise disclosed in
the schedules hereto or consented to in writing by CADI:

          (a) Carry on its  businesses  in the  ordinary  and regular  course in
substantially the same manner as heretofore  conducted and not engage in any new
line of business or enter into any  agreement,  transaction  or activity or make
any  commitment  except in the ordinary  and regular  course of business and not
otherwise prohibited under this Section 5.2;

          (b) Neither change nor amend its Articles of Incorporation or Bylaws;

          (c) Not make any changes (by split-up, combination,  reorganization or
otherwise)  in the capital  structure of MEDY,  Merger  Subsidiary or the Merger
Subsidiary;

          (d) Not  declare,  pay or set aside for payment any  dividend or other
distribution in respect of the capital stock or other equity  securities of MEDY
and not redeem, purchase or otherwise acquire any shares of the capital stock or
other  securities  of MEDY or the Merger  Subsidiary,  or rights or  obligations
convertible  into or  exchangeable  for any shares of the capital stock or other
securities of MEDY,  Merger  Subsidiary or the Merger  Subsidiary or obligations
convertible  into such, or any options,  warrants or other rights to purchase or
subscribe to any of the foregoing;

          (e) Not acquire or enter into any  agreement  to  acquire,  by merger,
consolidation or purchase of stock or assets, any business or entity which would
have a MEDY Material Adverse Effect; and

          (f) Use its  reasonable  efforts  to  preserve  intact  the  corporate
existence, goodwill and business organization of MEDY and the Merger Subsidiary,
to keep the officers and employees of MEDY and the Merger  Subsidiary  available
to MEDY and to preserve the relationships of MEDY and the Merger Subsidiary with
suppliers,  customers and others  having  business  relations  with any of them,
except for such instances which would not have a MEDY Material Adverse Effect;




                                      -26-

<PAGE>




     5.3 Notice of any Material  Change.  Each of CADI and MEDY shall,  promptly
after the first  notice or  occurrence  thereof  but not later than the  Closing
Date,  advise the other in writing of any event or the existence of any state of
facts  that (i) would make any of its  representations  and  warranties  in this
Agreement  untrue in any material  respect,  or (ii) would otherwise  constitute
either a CADI Material Adverse Effect or a MEDY Material Adverse Effect.

     5.4 Inspection and Access to Information.

          (a) Between the date of this  Agreement and the Effective  Date,  CADI
will provide to the Merger  Subsidiary and MEDY and their  accountants,  counsel
and other authorized  representatives  reasonable access, during normal business
hours to its premises, properties,  contracts,  commitments,  books, records and
other  information  (including tax returns filed and those in  preparation)  and
will cause its officers to furnish to MEDY and the Merger  Subsidiary  and their
authorized  representatives  such  financial,  technical and operating  data and
other information  pertaining to its business, as the Merger Subsidiary and MEDY
shall from time to time reasonably request.

          (b) Between the date of this  Agreement and the Effective  Date,  MEDY
will,  and will  cause the  Merger  Subsidiary  to,  provide  to CADI,  the CADI
Shareholders,  and their  respective  accountants,  counsel and other authorized
representatives reasonable access, during normal business hours to its premises,
properties,   contracts,  commitments,  books,  records  and  other  information
(including  tax  returns  filed and  those in  preparation)  and will  cause its
officers  to  furnish  to CADI and the CADI  Shareholders  and their  authorized
representatives   such  financial,   technical  and  operating  data  and  other
information pertaining to its business, as CADI or any CADI Shareholder may from
time to time reasonably request.

          (c) Each of the parties  hereto and their  respective  representatives
shall maintain the  confidentiality  of all information  (other than information
which is generally  available to the public) concerning the other parties hereto
acquired pursuant to the transactions  contemplated hereby in the event that the
Merger is not completed.  Each of the parties  hereto and their  representatives
shall not use such  information  so  obtained.  All files,  records,  documents,
information,  data and similar items relating to the confidential information of
CADI, whether prepared by MEDY or otherwise coming into MEDY's possession, shall
remain the exclusive  property of CADI and shall be promptly  delivered to CADI,
together with all copies thereof, upon termination of this Agreement. All files,
records,  documents,  information,  data  and  similar  items  relating  to  the
confidential  information of MEDY,  whether prepared by CADI or otherwise coming
into CADI's possession, shall remain the exclusive property of MEDY and shall be
promptly delivered to MEDY,  together with all copies thereof,  upon termination
of this Agreement.





                                      -27-

<PAGE>



     5.5 MEDY Exchange Act Reports. CADI acknowledges that MEDY will be required
to reports its  acquisition of CADI promptly  following the Effective Date. CADI
agrees to provide as promptly as practicable to MEDY such information concerning
its business and financial statements and affairs as, in the reasonable judgment
of MEDY, may be required or appropriate for inclusion in the required report, or
in any amendments or supplements  thereto, and to cause its counsel and auditors
to cooperate with MEDY's counsel and auditors in the preparation of such report.

     5.6  Nasdaq  Notification.  MEDY will file a  notification  with the Nasdaq
SmallCap Market for the issuance of the shares of MEDY Common Stock to be issued
in the Merger.

     5.7 Reasonable  Efforts;  Further Assurances;  Cooperation.  Subject to the
other  provisions  of this  Agreement,  the parties  hereby shall each use their
reasonable  efforts to perform their obligations herein and to take, or cause to
be taken or do, or cause to be done, all things reasonably necessary,  proper or
advisable  under  applicable law to obtain all regulatory  approvals and satisfy
all  conditions to the  obligations  of the parties under this  Agreement and to
cause the Merger and the other  transactions  contemplated  herein to be carried
out promptly in accordance with the terms hereof. The parties agree to use their
reasonable best efforts to complete the transactions  contemplated hereby by the
date specified in Section 9.1(b) hereof.  The parties shall cooperate fully with
each other and their respective officers, directors, employees, agents, counsel,
accountants  and other  designees in  connection  with any steps  required to be
taken as a part of their respective obligations under this Agreement,  including
without limitation:

          (a) In the event  any  claim,  action,  suit,  investigation  or other
proceeding by any governmental body or other person is commenced which questions
the  validity  or  legality  of the  Merger  or any  of the  other  transactions
contemplated hereby or seeks damages in connection therewith,  the parties agree
to  cooperate  and use all  reasonable  efforts to defend  against  such  claim,
action,  suit,  investigation or other proceeding and, if an injunction or other
order  is  issued  in any such  action,  suit or  other  proceeding,  to use all
reasonable  efforts  to have  such  injunction  or other  order  lifted,  and to
cooperate  reasonably  regarding any other  impediment to the  completion of the
transactions contemplated by this Agreement.

          (b) Each party  shall give prompt  written  notice to the other of (i)
the occurrence,  or failure to occur,  of any event which  occurrence or failure
would be likely to cause any  representation or warranty of CADI or MEDY, as the
case may be,  contained  in this  Agreement  to be untrue or  inaccurate  in any
material  respect at any time from the date hereof to the Effective Date or that
will or may result in the failure to satisfy the conditions specified in Article
6 or 7 and (ii) any failure of CADI or MEDY,  as the case may be, to comply with
or satisfy any covenant, condition or agreement to be complied with or satisfied
by it hereunder.




                                      -28-

<PAGE>




     5.8  Public  Announcements.  The timing  and  content of all  announcements
regarding any aspect of this Agreement or the Merger to the financial community,
government  agencies,  employees or the general public shall be mutually  agreed
upon in  advance  (unless  MEDY or CADI is  advised  by  counsel  that  any such
announcement or other disclosure not mutually agreed upon in advance is required
to be made by law or applicable  SmallCap Market rule and then only after making
a reasonable attempt to comply with the provisions of this Section).

     5.9 No  Solicitations.  From the date hereof  until the  Effective  Date or
until this  Agreement is terminated or abandoned as provided in this  Agreement,
CADI shall not directly or indirectly (i) solicit or initiate discussion with or
(ii) enter into  negotiations or agreements with, or furnish any information to,
any corporation,  partnership, person or other entity or group (other than MEDY,
an  affiliate  of MEDY or  their  authorized  representatives  pursuant  to this
Agreement)  concerning any proposal for a merger,  sale of  substantial  assets,
sale of shares of stock or securities or other takeover or business  combination
transaction (the "Acquisition  Proposal") involving CADI, and CADI will instruct
its officers,  directors,  advisors and its financial and legal  representatives
and consultants  not to take any action contrary to the foregoing  provisions of
this sentence; provided, however, that CADI, its officers,  directors,  advisors
and  its  financial  and  legal  representatives  and  consultants  will  not be
prohibited  from  taking any action  described  in (ii) above to the extent such
action is taken by, or upon the  authority of, the Board of Directors of CADI in
the  exercise  of  good  faith  judgment  as to  its  fiduciary  duties  to  the
shareholders  of CADI,  which judgment is based upon the advice of  independent,
outside  legal  counsel that a failure of the Board of Directors of CADI to take
such action would be likely to  constitute a breach of its  fiduciary  duties to
such shareholders. CADI will notify MEDY promptly if CADI becomes aware that any
inquiries or proposals are received by, any information is requested from or any
negotiations  or discussions  are sought to be initiated with, CADI with respect
to an Acquisition Proposal,  and CADI shall promptly deliver to MEDY any written
inquiries or proposals received by CADI relating to an Acquisition Proposal.

     5.10 MEDY Board of Directors. MEDY's Board of Directors shall following the
Effective Date take all action necessary to cause the Board of Directors of MEDY
to be  increased  by one  director  and shall take all such action  necessary to
cause Daniel  Richmond and Chae Uk Kim to be elected as a director of MEDY for a
term expiring at the first annual meeting of  stockholders of MEDY following the
Effective Date.





                                      -29-

<PAGE>



                                    ARTICLE 6

                   Conditions Precedent to Obligations of CADI
                   -------------------------------------------

     Except as may be waived by CADI,  the  obligations  of CADI to complete the
transactions contemplated by this Agreement shall be subject to the satisfaction
on or before the Closing Date of each of the following conditions:

     6.1 Compliance.  MEDY shall have, or shall have caused to be,  satisfied or
complied  with and performed in all material  respects all terms,  covenants and
conditions  of this  Agreement  to be complied  with or  performed by MEDY on or
before the Closing Date.

     6.2  Representations  and  Warranties.   All  of  the  representations  and
warranties  made by MEDY in this  Agreement  shall  be true and  correct  in all
material  respects at and as of the Closing  Date with the same force and effect
as if such representations and warranties had been made at and as of the Closing
Date, except for changes permitted or contemplated by this Agreement.

     6.3 Material Adverse Changes. Subsequent to June 30, 1997, there shall have
occurred no MEDY Material Adverse Effect other than any such change that affects
both MEDY and CADI in a substantially similar manner.

     6.4  Certificates.  CADI shall have received a certificate or certificates,
executed on behalf of MEDY by an executive  officer of MEDY,  to the effect that
the  conditions  contained  in  Sections  6.1,  6.2 and  6.3  hereof  have  been
satisfied.

     6.5  Stockholder  Approval.  This  Agreement  shall have been  approved and
adopted by the  affirmative  vote of the  holders  of a  majority  of all of the
outstanding shares of CADI Common Stock.

     6.6  Consents;  Litigation.  Other than the filing of Articles of Merger as
described in Article 1, all authorizations, consents, orders or approvals of, or
declarations  or filings with, or expirations or terminations of waiting periods
imposed by any governmental entity, and all required third-party  consents,  the
failure to obtain which would have a MEDY Material  Adverse  Effect,  shall have
been obtained.  In addition,  no  preliminary  or permanent  injunction or other
order shall have been issued by any court or by any  governmental  or regulatory
agency,  body or authority  which prohibits the completion of the Merger and the
transactions  contemplated  by this  Agreement  and  which is in  effect  at the
Effective Date.





                                      -30-

<PAGE>



     6.7 Employment and Non-Competition  Agreements.  The Employment Agreements,
in the forms of  Schedules  6.7a and 6.7b  hereto,  between CADI and each of Dan
Richmond and Chae Uk Kim shall be executed and delivered by the parties thereto.

     6.8 Stock Option Agreements.  In connection with the Employment  Agreements
described  in Section 6.7 hereof,  MEDY shall issue to each of Messrs.  Richmond
and Kim options to purchase 600,000 shares of MEDY Common Stock, such options to
be represented by Agreements in the form of Schedule 6.8.

     6.9 Employee Stock Options.  Prior to the Effective  Date,  MEDY shall have
approved an employee  stock  option  plan for  employees  of CADI in the form of
Schedule 6.9.

     6.10 Registration Rights Agreement.  The Registration Rights Agreement,  in
the form of Schedule 6.10 hereto,  by and among Dan  Richmond,  Chae Uk Kim, and
MEDY, will be in full force and effect as of the Closing Date.

     6.11 Legal  Opinion.  CADI shall have received a legal opinion from counsel
to MEDY in the form of Schedule 6.11 hereto.

                                    ARTICLE 7

                   Conditions Precedent to Obligations of MEDY
                            and the Merger Subsidiary
                            -------------------------

     Except as may be waived by MEDY and the Merger Subsidiary,  the obligations
of MEDY and the Merger  Subsidiary to complete the transactions  contemplated by
this Agreement  shall be subject to the  satisfaction,  on or before the Closing
Date, of each of the following conditions:

     7.1 Compliance.  CADI shall have, or shall have caused to be,  satisfied or
complied with and performed in all material respects all terms,  covenants,  and
conditions of this Agreement to be complied with or performed by it on or before
the Closing Date.

     7.2  Representations  and  Warranties.   All  of  the  representations  and
warranties  made by CADI in this  Agreement  shall  be true and  correct  in all
material  respects at and as of the Closing  Date with the same force and effect
as if such representations and warranties had been made at and as of the Closing
Date.

     7.3 Material Adverse Changes.  Since June 30, 1997,  except as set forth in
this  Agreement or on the  schedules  hereto,  there shall have occurred no CADI
Material  Adverse  Effect  other than any such change that affects both MEDY and
CADI in a substantially similar manner.





                                      -31-

<PAGE>




     7.4  Certificates.  MEDY shall have received a certificate or certificates,
executed on behalf of CADI by an executive  officer of CADI,  to the effect that
the conditions in Sections 7.1, 7.2 and 7.3 hereof have been satisfied.

     7.5 Consents;  Litigation.  Other than the filing of the Articles of Merger
as described in Article 1, all authorizations, consents, orders or approvals of,
or  declarations  or filings with, or  expirations  or  terminations  of waiting
periods  imposed  by, any  governmental  entity,  and all  required  third-party
consents,  the failure to obtain which would have a CADI Material Adverse Effect
or a MEDY Material Effect, shall have been obtained. In addition, no preliminary
or permanent injunction or other order shall have been issued by any court or by
any  governmental  or regulatory  agency,  body or authority which prohibits the
completion of the Merger and the transactions contemplated by this Agreement and
which is in effect at the Effective Date.

     7.6 Release by James DeVico,  Jr.  Effective the Effective Date and receipt
by Mr. DeVico of the requisite  consideration,  James  DeVico,  Jr.,  formerly a
shareholder of CADI, will execute a mutual general release  satisfactory to MEDY
for the  benefit of CADI,  its  officers,  directors,  employees,  shareholders,
agents,  and  parents in  substantially  the form of  Schedule  7.6  hereto.  In
connection  with obtaining the release from Mr. DeVico,  and provided Mr. DeVico
enters into an the  investment  letter in the form of  Schedule  7.9 here and an
exemption  exists  for  the  transaction  (which  must  be  established  to  the
reasonable satisfaction of MEDY), MEDY will pay Mr. DeVico:

          (a) 304,480 shares of MEDY Common Stock;

          (b) $45,303 in cash; and

          (c) An unsecured  promissory note for $100,000 in the form of Schedule
1.1.

     7.7  Employment  and   Non-Competition   Agreements.   The  Employment  and
Non-Competition  Agreements,  in the form of  Schedules  6.7a  and 6.7b  hereto,
between  CADI and each of Dan  Richmond  and Chae Uk Kim shall be  executed  and
delivered by the parties thereto.

     7.8 Legal Opinion. MEDY shall have received a legal opinion from counsel to
CADI in the form of Schedule 7.8 hereto.

     7.9  Investment  Representations.  Each of the CADI  Shareholders  and each
person entitled to receive MEDY Common Stock or a Promissory Note from MEDY as a




                                      -32-

<PAGE>



part of the Merger  Consideration  shall have conducted such  investigation into
MEDY as such person may have desired and shall, on or before the Effective Date,
execute and  deliver to MEDY an  Investment  Letter in the form of Schedule  7.9
hereto.

                                    ARTICLE 8

     8.1  Indemnification.  In the  event of any  threatened  or  actual  claim,
action,  suit,  proceeding  or  investigation  (including  any claims  regarding
securities law matters),  whether civil, criminal or administrative,  including,
without limitation, any such claim, action, suit, proceeding or investigation in
which any of the present or former  officers or directors  (the  "Managers")  of
CADI is, or is  threatened  to be, made a party by reason of the fact that he or
she is or was a stockholder, director, officer, employee or agent of CADI, or is
or was serving at the request of CADI as a director,  officer, employee or agent
of another corporation,  partnership,  joint venture, trust or other enterprise,
whether before or after the Effective Date,

     CADI shall  indemnify and hold  harmless,  and from and after the Effective
Date each of the Surviving Corporation and

     MEDY shall indemnify and hold harmless, as and to the full extent permitted
by  applicable  law  (including  by advancing  expenses  promptly as  statements
therefor are received),

each such  Manager  against any losses,  claims,  damages,  liabilities,  costs,
expenses  (including  attorneys'  fees),  judgments,  fines and amounts  paid in
settlement  in  connection  with any such claim,  action,  suit,  proceeding  or
investigation,  and in the event of any such claim,  action,  suit proceeding or
investigation (whether arising before or after the Effective Date),

             (i) if CADI (prior to the Effective  Date) or MEDY or the Surviving
Corporation  (after the Effective Date) have not promptly assumed the defense of
such matter, the Managers may retain counsel  satisfactory to them, and CADI, or
the Surviving  Corporation and MEDY after the Effective Date, shall pay all fees
and expenses of such counsel for the Managers promptly,  as statements  therefor
are received, and

             (ii)  CADI,  or  the  Surviving  Corporation  and  MEDY  after  the
Effective Date, will use their respective best efforts to assist in the vigorous
defense  of any such  matter;  provided  that  neither  CADI  nor the  Surviving
Corporation  or MEDY shall be liable for any  settlement  effected  without  its
prior written consent (which consent shall not be unreasonably withheld);

and  provided  further  that the  Surviving  Corporation  and MEDY shall have no
obligation under the foregoing  provisions of this Section 8.1 to any Manager if
(x) the indemnification




                                      -33-

<PAGE>



of such Manager in the manner  contemplated  hereby is  prohibited by applicable
law,  and (y) CADI has  breached a  representation  or warranty  hereunder  with
respect to the same  matters for which  indemnification  is being sought by such
Manager  and such  Manager  fails to  prove  that  such  Manager  had no  actual
knowledge of such breach at the Effective Date.

          (b)   Reimbursement.   Upon  the  determination   that  the  Surviving
Corporation  or MEDY is not  liable  for any such  indemnification  claims,  the
Manager will reimburse MEDY and the Surviving Corporation for any fees, expenses
and costs incurred by MEDY or the Surviving  Corporation in connection  with the
defense of such claims.

          (c) Notification.  Any Manager wishing to claim  indemnification under
this Section 8.1, upon learning of any such claim, action,  suit,  proceeding or
investigation,  shall notify CADI and,  after the Effective  Date, the Surviving
Corporation  and MEDY,  thereof  (provided  that the failure to give such notice
shall not  affect  any  obligations  hereunder,  except to the  extent  that the
indemnifying party is actually and materially prejudiced thereby). MEDY and CADI
agree that all rights to  indemnification  existing in favor of the  Managers as
provided in CADI's  Articles of  Incorporation  or Bylaws as in effect as of the
date hereof,  and in any agreement  between CADI and any Manager with respect to
matters  occurring prior to the Effective Date,  shall survive the Merger.  MEDY
further  covenants  not to amend or repeal any  provisions  of the  Articles  of
Incorporation  or Bylaws of CADI in any manner which would adversely  affect the
indemnification or exculpatory provisions contained therein.

          (d)  Inurement.  The provisions of this Section 8.1 are intended to be
for the benefit of, and shall be enforceable by, each indemnified  party and his
or her heirs and representatives.

                                    ARTICLE 9

                                  Miscellaneous
                                  -------------

     9.1 Termination.  In addition to the provisions  regarding  termination set
forth elsewhere herein, this Agreement and the transactions  contemplated hereby
may be terminated at any time on or before the Closing Date:

          (a) by mutual consent of CADI and MEDY;

          (b) by either MEDY or CADI if the  transactions  contemplated  by this
Agreement  have not been  completed by October 25, 1997,  unless such failure of
completion is due to the failure of the terminating  party to perform or observe
the covenants,  agreements, and conditions hereof to be performed or observed by
it at or before the Closing Date;




                                      -34-

<PAGE>




          (c) by either  CADI or MEDY if the  transactions  contemplated  hereby
violate  any  nonappealable  final  order,  decree,  or judgment of any court or
governmental body or agency having competent jurisdiction; or

          (d) by MEDY if the CADI Board of  Directors  withdraws  or  materially
modifies or changes its  recommendation  to the  stockholders of CADI to approve
this  Agreement  and the  Merger if there  exists  at such  time an  Acquisition
Proposal.

     9.2 Expenses.

          (a) Except as provided in (b) below, if the transactions  contemplated
by this  Agreement  are not  completed,  each  party  hereto  shall  pay its own
expenses  incurred  in  connection  with  this  Agreement  and the  transactions
contemplated hereby.

          (b) If, (i) this  Agreement is  terminated by MEDY pursuant to Section
9.1(d)  hereof on or before the date set forth in Section  9.1(b) and while this
Agreement  remains in effect,  CADI  enters  into a  definitive  agreement  with
respect to an Acquisition Proposal with any corporation,  partnership, person or
other  entity or group  (other  than MEDY or any  affiliate  of MEDY),  and such
transaction  (including  any  revised  transaction  based  upon the  Acquisition
Proposal) is thereafter  completed (whether before or after such date) then CADI
shall  pay to MEDY a fee  equal to the sum of the  documented  fees,  costs  and
expenses,  including  legal and  accounting  fees incurred by MEDY in connection
with the transactions  contemplated by this Agreement,  which such amounts shall
be payable in same day funds to an account specified by MEDY.

     9.3 Entire  Agreement.  This Agreement and the schedules hereto contain the
complete   agreement  among  the  parties  with  respect  to  the   transactions
contemplated hereby and supersede all prior agreements and understandings  among
the parties with respect to such  transactions.  Section and other  headings are
for  reference  purposes  only  and  shall  not  affect  the  interpretation  or
construction  of  this   Agreement.   The  parties  hereto  have  not  made  any
representation or warranty except as expressly set forth in this Agreement or in
any certificate or schedule  delivered  pursuant hereto.  The obligations of any
party  under any  agreement  executed  pursuant to this  Agreement  shall not be
affected by this section.

     9.4 Survival of Representations  and Warranties.  The  representations  and
warranties  of each  party  contained  herein or in any  schedule,  certificate,
document or instrument  delivered  pursuant to this Agreement  shall survive the
Closing for three years following the Effective Date.

     9.5  Counterparts.  This  Agreement  may  be  executed  in  any  number  of
counterparts,  each of which when so executed and  delivered  shall be deemed an
original, and such counterparts together shall constitute only one original.




                                      -35-

<PAGE>




     9.6 Notices. All notices,  demands,  requests, or other communications that
may be or are  required to be given,  served,  or sent by any party to any other
party  pursuant  to this  Agreement  shall be in  writing  and  shall be sent by
facsimile transmission, next-day courier or mailed by first-class, registered or
certified mail,  return receipt  requested,  postage prepaid,  or transmitted by
hand delivery, addressed as follows:

          (i) If to CADI:

         Computer Age Dentist, Inc.
         2525 Ocean Park Blvd., Suite 100
         Santa Monica, CA   90405
         Attention:  Dan Richmond, CEO
         Tel:  310-392-9177
         Fax:  310-392-6198

         with a copy (which shall not constitute notice) to:


         Kessler & Kessler
         2029 Century Park East, Suite 1520
         Los Angeles, CA 90067
         Attn: Warren J. Kessler, Esq.
         Tel: 310-552-9800
         Fax: 310-552-0442




          (ii) If to MEDY or Merger Subsidiary:

         Medical Dynamics, Inc.
         99 Inverness Drive East
         Englewood, Colorado  80112
         Attention:  Van A. Horsley, President
         Tel:  303-790-2990
         Fax:  303-708-8557





                                      -36-

<PAGE>



         with a copy (which shall not constitute notice) to:

         Friedlob Sanderson Raskin Paulson & Tourtillott, LLC
         1400 Glenarm Place
         Third Floor
         Denver, Colorado 80202
         Attention: Herrick K. Lidstone, Jr., Esq.
         Tel:  (303) 571-1400
         Fax:  (303) 595-3159

     Each party may  designate  by notice in writing a new  address to which any
notice, demand, request, or communication may thereafter be so given, served, or
sent. Each notice, demand, request, or communication that is mailed,  delivered,
or transmitted in the manner described above shall be deemed sufficiently given,
served,  sent,  and received for all purposes at such time as it is delivered to
the addressee (with the return receipt, the delivery receipt or the affidavit of
messenger being deemed conclusive  evidence of such delivery) or at such time as
delivery is refused by the addressee upon presentation.

     9.7 Successors;  Assignments. This Agreement and the rights, interests, and
obligations  hereunder  shall be binding  upon and shall inure to the benefit of
the parties hereto and their  respective  successors  and assigns.  Neither this
Agreement nor any of the rights,  interests or  obligations  hereunder  shall be
assigned, by operation of law or otherwise, by any of the parties hereto without
the prior written consent of the other.

     9.8  Governing  Law.  This  Agreement  shall be  construed  and enforced in
accordance  with the laws of the State of  Colorado  (except  the  choice of law
rules thereof).

     9.9 Waiver and Other Action.  This Agreement may be amended,  modified,  or
supplemented only by a written instrument  executed by the parties against which
enforcement of the amendment, modification or supplement is sought.

     9.10  Severability.  If any  provision  of  this  Agreement  is  held to be
illegal, invalid, or unenforceable, such provision shall be fully severable, and
this Agreement shall be construed and enforced as if such illegal,  invalid,  or
unenforceable  provision  were never a part  hereof;  the  remaining  provisions
hereof  shall  remain in full force and effect and shall not be  affected by the
illegal, invalid, or unenforceable provision or by its severance; and in lieu of
such  illegal,  invalid,  or  unenforceable  provision,  there  shall  be  added
automatically as part of this Agreement,  a provision as similar in its terms to
such  illegal,  invalid,  or  unenforceable  provision as may be possible and be
legal, valid, and enforceable.





                                      -37-

<PAGE>



     9.11 No Third Party Beneficiaries. Article 8 is intended for the benefit of
each  "Manager"  (as defined in Article 8) and may be enforced by such  persons,
their  heirs and  representatives.  Other  than as  expressly  set forth in this
Section 9.11,  nothing  expressed or implied in this  Agreement is intended,  or
shall be construed, to confer upon or give any person, firm or corporation other
than  the  parties  hereto  and  their  stockholders,   any  rights,   remedies,
obligations  or  liabilities  under or by reason of this  Agreement or result in
such person,  firm or corporation being deemed a third party beneficiary of this
Agreement, even if such person is specifically named herein.

     9.12 Mutual  Contribution.  The parties to this Agreement and their counsel
have mutually  contributed to its drafting.  Consequently,  no provision of this
Agreement  shall be  construed  against  any party on the ground that such party
drafted the  provision  or caused it to be drafted or the  provision  contains a
covenant of such party.

     9.13  Arbitration.  Any controversy or dispute among the parties arising in
connection  with  this  Agreement  shall  be  submitted  to  a  panel  of  three
arbitrators and finally settled by arbitration in accordance with the commercial
arbitration rules of the American Arbitration Association. Each of the disputing
parties  shall  appoint  one  arbitrator,   and  these  two  arbitrators   shall
independently select a third arbitrator. Arbitration shall take place in Denver,
Colorado.  The  prevailing  party in such  arbitration  shall be entitled to the
award of all costs and attorneys' fees in connection with such action. Any award
for monetary damages  resulting from nonpayment of sums due hereunder shall bear
interest  from the date on which  such sums  were  originally  due and  payable.
Judgment upon the award rendered may be entered in any court having jurisdiction
or  application  may be made to such court for judicial  acceptance of the award
and an order of enforcement, as the case may be.





                                      -38-

<PAGE>



     9.14  Schedules.   The  following  Schedules  constitute  a  part  of,  and
incorporated into, this Agreement.

         Schedule          Description
         --------          -----------

         1.1         Promissory Note
         3.2         CADI Subsidiaries and Investments
         3.13        Material Contracts
         3.17        Employment Agreements and Plans
         4.9         Changes
         6.7a        Employment Agreement - Richmond
         6.7b        Employment Agreement - Kim
         6.8         Form of Stock Option Agreement
         6.9         Employee Stock Option Plan
         6.10        Registration Rights Agreement
         6.11        Opinion of Counsel to MEDY
         7.6         Release of James DeVico, Jr.
         7.8         Opinion of Counsel to CADI
         7.9         Investment Letter





                                      -39-

<PAGE>



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

MEDICAL DYNAMICS, INC.


By:
   ---------------------------------------------------
         Van A. Horsley, President

CADI ACQUISITION CORP.


By:
   ---------------------------------------------------
         Van A. Horsley, President

COMPUTER AGE DENTIST, INC.


By:
   ---------------------------------------------------
         Daniel L. Richmond, Chief Executive Officer




                                      -40-




                          REGISTRATION RIGHTS AGREEMENT
                          -----------------------------

     This Registration Rights Agreement (the "Agreement") is made and entered as
of this 31st day of  October,  1997 by and between  Medical  Dynamics,  Inc.,  a
Colorado  corporation  (the  "Company")  and  The  Tail  Wind  Fund,  Ltd.  (the
"Investor")  pursuant to the  Purchase  Agreement  of even date  herewith by and
between the Company and the Investor (the "Purchase Agreement").

     The parties hereby agree as follows:

     1. Certain Definitions

          As used  in  this  Agreement,  the  following  terms  shall  have  the
following meanings:

          "Common Stock" shall mean the Common Stock, par value $.001 per share,
of the Company.

          "Debenture" means the Debentures in the aggregate  principal amount of
$1,100,000 issued to the Investor pursuant to the Purchase Agreement.

          "Prospectus"  shall mean the prospectus  included in any  Registration
Statement,  as amended or supplemented by any prospectus supplement with respect
to the  terms of the  offering  of any  portion  of the  Registrable  Securities
covered  by  such  Registration  Statement  and  by  all  other  amendments  and
supplements  to the  prospectus,  including  post-effective  amendments  and all
material incorporated by reference in such prospectus.

          "Register,"  "registered" and  "registration"  refer to a registration
made by preparing  and filing a  registration  statement or similar  document in
compliance with the 1933 Act (as defined below), and the declaration or ordering
of effectiveness of such registration statement or document.

          "Registrable Securities" shall mean (i) the Common Stock acquired upon
the  conversion  of the  Debenture,  (ii) the Common  Stock issued as payment of
principal or accrued and unpaid interest on the Debentures (the number of shares
to be estimated for purposes of  registration),  (iii) the Common Stock acquired
upon the  exercise  of the  Warrants,  and (iv) any Common  Stock of the Company
issued as (or issuable upon the conversion or exercise of any warrant,  right or
other security which is issued as) a dividend or other distribution with respect
to, or in exchange for or in replacement of, such Common Stock, excluding in all
cases, however, any Registrable  Securities sold by a person in a transaction in
which its rights under this Agreement are not assigned.

28366_1



<PAGE>




          "Registration  Statement" shall mean any registration statement of the
Company that covers any of the Registrable Securities pursuant to the provisions
of this Agreement, including the Prospectus,  amendments and supplements to such
Registration Statement,  including post-effective  amendments,  all exhibits and
all material incorporated by reference in such Registration Statement.

          "SEC" means the U.S. Securities and Exchange Commission.

          "1933 Act" means the Securities Act of 1933, as amended, and the rules
and regulations promulgated thereunder.

          "1934 Act" means the Securities Exchange Act of 1934, as amended,  and
the rules and regulations promulgated thereunder.

          "Warrant"  means the Warrant to purchase shares of Common Stock issued
to the Investor pursuant to the Purchase Agreement.

     2. Registration.

          (a)  Registration  Statement.  Promptly  following  the closing of the
transactions contemplated by the Purchase Agreement (the "Closing Date") (but no
later than thirty days after the Closing  Date),  the Company  shall prepare and
file with the SEC a  registration  statement on Form S-3 (or, if Form S-3 is not
then available to the Company, on such form of registration statement as is then
available to effect such a registration of the Registrable  Securities,  subject
to the Investor's  consent)  covering the resale of the Registrable  Securities.
Such Registration  Statement, to the extent allowable under the 1933 Act and the
Rules  promulgated  thereunder  (including  rule  416),  shall  state  that such
Registration  Statement  also covers  such  indeterminate  number of  additional
shares of Common Stock as may become  issuable upon conversion of the Debentures
to prevent  dilution  resulting  from stock splits,  stock  dividends or similar
transactions  or by reason of changes in the Conversion  Price of the Debentures
in  accordance  with the terms  thereof.  No securities  other than  Registrable
Securities shall be included in the Registration  Statement  without the consent
of the Investor.  The  Registration  Statement (and each amendment or supplement
thereto,  and each request for acceleration of  effectiveness  thereof) shall be
provided to (and subject to the approval of) the Investor and its counsel  prior
to its filing or other submission.

          (b) Expenses.  The Company will pay all expenses  associated  with the
registration,  excluding discounts,  commissions, fees of underwriters,  selling
brokers,  dealer managers or similar securities industry  professionals relating
to the  distribution  of the  Registrable  Securities,  and reasonable  fees and
expenses of counsel to the Investor.


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          (c) Effectiveness.

             (i)  The  Company   shall  use  its  best  efforts  to  obtain  the
effectiveness of the Registration  Statement as soon as practicable.  If (A) the
Registration  Statement  is not  declared  effective  by the SEC  within 90 days
following the Closing Date (the "Registration Date"), (B) after the Registration
Statement has been declared  effective by the SEC, sales cannot be made pursuant
to the  Registration  Statement  (by reason of a stop  order,  or the  Company's
failure to update the  Registration  Statement),  or (C) the Common Stock is not
listed or included  for  quotation on the Nasdaq  SmallCap  Market  System,  The
Nasdaq National Market System, the New York Stock Exchange or the American Stock
Exchange,  then the Company will make  payments to the  Investor,  as liquidated
damages  and  not as a  penalty,  in an  amount  equal  to 2% of  the  aggregate
principal  amount of the Debenture for each month or portion  thereof  following
the  Registration  Date during which the  registration  is not effective  (which
remedy  shall not be  exclusive  of any other  remedies  available  at law or in
equity); provided, however, that such damages shall not accrue for an additional
period of twenty (20) days if the Registration Statement is reviewed by the SEC.
The Company shall bear all reasonable fees or costs incurred by the Investor for
legal counsel as a result of the filing of any post-effective  amendments to the
Registration  Statement.  The amounts payable as liquidated  damages pursuant to
this paragraph shall be payable in lawful money of the United States on the last
day of  each  month  following  the  Registration  Date or the  date on  which a
post-effective amendment is filed, as applicable.

             (ii) The  Company may  terminate  or suspend  effectiveness  of any
registration contemplated by this Section one time for a period of not more than
30 days if the Company shall deliver to the Investor a certificate signed by the
President of the Company  stating that, in the good faith  judgment of the Board
of  Directors  of the  Company,  it would (A) be  seriously  detrimental  to the
business of the Company for such registration to be effected or remain effective
at such time,  (B)  interfere  with any proposed or pending  material  corporate
transaction  involving the Company or any of its subsidiaries,  or (C) result in
any premature disclosure thereof.

          (d) Underwritten  Offering. If any offering pursuant to a Registration
Statement pursuant to Section 2(a) hereof involves an underwritten offering, the
Investor  shall have the right to select  one legal  counsel  and an  investment
banker and  manager to  administer  the  offering,  which  investment  banker or
manager shall be reasonably satisfactory to the Company.

     3. Company Obligations. The Company will use its best efforts to effect the
registration and the resale of the Registrable Securities in accordance with the
intended method of disposition  thereof,  and pursuant thereto the Company will,
as expeditiously as possible:



28366_1



<PAGE>



          (a) use  its  reasonable  best  efforts  to  cause  such  Registration
Statement to become effective and to remain continuously  effective for a period
which  will  terminate  when  all   Registrable   Securities   covered  by  such
Registration Statement, as amended from time to time, have been sold;

          (b) prepare and file with the SEC such  amendments and post- effective
amendments to the Registration  Statement and the Prospectus as may be necessary
to keep the Registration Statement effective for the period specified in Section
3(a) and to  comply  with the  provisions  of the 1933 Act and the 1934 Act with
respect to the distribution of all Registrable  Securities;  provided that, at a
time reasonably  prior to the filing of a Registration  Statement or Prospectus,
or any  amendments  or  supplements  thereto,  the Company  will  furnish to the
Investor copies of all documents  proposed to be filed,  which documents will be
subject to the comments of the Investor and its counsel;

          (c) permit a single  firm of counsel  designated  by the  Investor  to
review the Registration  Statement and all amendments and supplements  thereto a
reasonable  period of time prior to their  filing with the SEC, and not file any
document in a form to which such counsel reasonably objects;

          (d) furnish to the Investor and its legal  counsel (i) promptly  after
the same is prepared and publicly  distributed,  filed with the SEC, or received
by the  Company,  one  copy of the  Registration  Statement  and  any  amendment
thereto,  each  preliminary  prospectus  and  Prospectus  and each  amendment or
supplement  thereto,  and each letter  written by or on behalf of the Company to
the SEC or the staff of the SEC, and each item of correspondence from the SEC or
the  staff of the SEC,  in each case  relating  to such  Registration  Statement
(other than any portion of any thereof which contains  information for which the
Company has sought confidential treatment),  and (ii) such number of copies of a
Prospectus,   including  a  preliminary  prospectus,   and  all  amendments  and
supplements  thereto and such other  documents as such  Investor may  reasonably
request in order to facilitate  the  disposition of the  Registrable  Securities
owned by such Investor;

          (e) in the event the Investor  selects  underwriters for the offering,
the Company shall enter into and perform its  obligations  under an underwriting
agreement, in usual and customary form, including, without limitation, customary
indemnification  and  contribution  obligations,  with the  underwriters of such
offering;

          (f) at the request of the Investor,  the Company shall furnish, on the
date that  Registrable  Securities are delivered to an underwriter,  if any, for
sale in connection  with the  Registration  Statement or, if such securities are
not being sold by an underwriter,  on the date of  effectiveness  thereof (i) an
opinion,  dated as of such date,  from  counsel  representing  the  Company  for
purposes of such  Registration  Statement,  in form,  scope and  substance as is
customarily  given  in  an  underwritten  public  offering,   addressed  to  the
underwriter,  if any, and the Investor and (ii) a letter,  dated such date, from
the Company's  independent certified public accountants in form and substance as


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<PAGE>



is customarily given by independent certified public accountants to underwriters
in an underwritten public offering,  addressed to the underwriters,  if any, and
the Investors;

          (g) make  reasonable  effort to prevent the issuance of any stop order
or other  suspension of effectiveness  and, if such order is issued,  obtain the
withdrawal of any such order at the earliest possible moment;

          (h) furnish to the  Investor at least five copies of the  Registration
Statement  and  any  post-effective   amendment  thereto,   including  financial
statements and schedules,  all documents  incorporated  therein by reference and
all exhibits (including those incorporated by reference);

          (i)  deliver  to  the  Investor  as  many  copies  of  the  Prospectus
(including each preliminary  prospectus) and any amendment or supplement thereto
as the Investor may reasonably request in order to facilitate the disposition of
the Registrable Securities;

          (j) prior to any public  offering of Registrable  Securities,  use its
reasonable  best efforts to register or qualify or  cooperate  with the Investor
and its counsel in connection  with the  registration or  qualification  of such
Registrable  Securities for offer and sale under the securities or blue sky laws
of such jurisdictions as the Investor  reasonably requests in writing and do any
and all other  reasonable  acts or things  necessary  or advisable to enable the
distribution in such jurisdictions of the Registrable  Securities covered by the
Registration  Statement;  provided  that the  Company  will not be  required  to
qualify  generally  to do business in any  jurisdiction  where it is not then so
qualified  or to take any action  which would  subject it to general  service of
process in any such jurisdiction where it is not then so subject;

          (k) cause  all  Registrable  Securities  covered  by the  Registration
Statement to be listed on each securities exchange, interdealer quotation system
or other  market on which  similar  securities  issued by the  Company  are then
listed;

          (l)  immediately  notify the  Investor  at any time when a  Prospectus
relating  thereto is required to be delivered  under the  Securities  Act,  upon
discovery  that,  or upon the  happening of any event as a result of which,  the
Prospectus included in such Registration  Statement, as then in effect, includes
an untrue  statement  of a  material  fact or omits to state any  material  fact
required to be stated  therein or necessary to make the  statements  therein not
misleading in the light of the circumstances  then existing,  and at the request
of any such  holder,  promptly  prepare and furnish to such holder a  reasonable
number of copies of a supplement to or an amendment of such Prospectus as may be
necessary so that, as thereafter delivered to the purchasers of such Registrable
Securities,  such Prospectus shall not include an untrue statement of a material
fact or omit to state a material fact required to be stated therein or necessary
to make the statements  therein not misleading in the light of the circumstances
then existing; and

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<PAGE>




          (m) otherwise use its best efforts to comply with all applicable rules
and  regulations of the SEC under the 1933 Act and the 1934 Act, take such other
actions as may be reasonably  necessary to facilitate  the  registration  or the
disposition of the Registrable  Securities hereunder;  and make available to its
security  holders,  as soon as  reasonably  practicable,  but not later than the
Availability Date (as defined below), an earnings statement covering a period of
at least twelve  months,  beginning  after the effective  date of the applicable
Registration Statement, which earnings statement shall satisfy the provisions of
subsection  11(a) of the 1933 Act (for  the  purpose  of this  subsection  3(m),
"Availability  Date" means the 45th day  following  the end of the fourth fiscal
quarter that includes the effective date of such Registration Statement,  except
that, if such fourth fiscal quarter is the last quarter of the Company's  fiscal
year, "Availability Date" means the 90th day after the end of such fourth fiscal
quarter).


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<PAGE>



     4. Obligations of the Investor.

          (a) It  shall  be a  condition  precedent  to the  obligations  of the
Company to complete the registration  pursuant to this Agreement with respect to
the  Registrable  Securities that the Investor shall furnish to the Company such
information  regarding  itself,  the  Registrable  Securities held by it and the
intended method of disposition of the Registrable Securities held by it as shall
be reasonably required to effect the registration of such Registrable Securities
and shall execute such  documents in connection  with such  registration  as the
Company may  reasonably  request.  At least three (3) business days prior to the
first anticipated filing date of the Registration  Statement,  the Company shall
notify the Investor of the information the Company requires from the Investor if
the Investor  elects to have any of the Registrable  Securities  included in the
Registration Statement.

          (b) The Investor,  by its  acceptance of the  Registrable  Securities,
agrees to cooperate  with the Company as reasonably  requested by the Company in
connection  with  the  preparation  and  filing  of the  Registration  Statement
hereunder,  unless  the  Investor  has  notified  the  Company in writing of its
election  to exclude all of the  Registrable  Securities  from the  Registration
Statement.

          (c) In the event the Investor  determines to engage the services of an
underwriter, the Investor agrees to enter into and perform its obligations under
an  underwriting  agreement,  in usual and customary  form,  including,  without
limitation,  customary  indemnification and contribution  obligations,  with the
managing  underwriter  of such  offering  and take  such  other  actions  as are
reasonably  required in order to expedite or facilitate the  dispositions of the
Registrable Securities.

          (d) The  Investor  agrees  that,  upon  receipt of any notice from the
Company of the happening of any event  rendering the  Registration  Statement no
longer  effective,  the Investor will  immediately  discontinue  disposition  of
Registrable  Securities  pursuant to the  Registration  Statement  covering such
Registrable  Securities  until  the  Investor's  receipt  of the  copies  of the
supplemented  or amended  prospectus  filed with the SEC and declared  effective
and, if so directed by the Company,  the Investor  shall  deliver to the Company
(at the  expense of the  Company)  or  destroy  (and  deliver  to the  Company a
certificate  of  destruction)  all copies in the  Investor's  possession  of the
prospectus covering the Registrable Securities current at the time of receipt of
such notice.

          (e) The Investor may not participate in any underwritten  registration
hereunder  unless it (i) agrees to sell the Registrable  Securities on the basis
provided in any  underwriting  arrangements  in usual and customary form entered
into by the Company,  (ii) completes and executes all questionnaires,  powers of
attorney,  indemnities,  underwriting  agreements and other documents reasonably
required under the terms of such underwriting arrangements,  and (iii) agrees to
pay its pro rata share of all  underwriting  discounts and  commissions  and any
expenses in excess of those payable by the Company pursuant to the terms of this
Agreement.

28366_1



<PAGE>





     5. Indemnification.

          (a)  Indemnification  by Company.  The Company agrees to indemnify and
hold  harmless,  to the  fullest  extent  permitted  by law  the  Investor,  its
officers,  directors,  partners and  employees  and each person who controls the
Investor  (within  the  meaning of the 1933 Act)  against  all  losses,  claims,
damages,   liabilities,   costs  (including,   without  limitation,   reasonable
attorney's  fees) and  expenses  caused  by (i) any  untrue  or  alleged  untrue
statement of a material fact contained in any Registration Statement, Prospectus
or any  preliminary  prospectus or any  amendment or  supplement  thereto or any
omission or alleged  omission to state  therein a material  fact  required to be
stated  therein or  necessary  to make the  statements  therein not  misleading,
except insofar as the same are based upon any  information  furnished in writing
to the Company by the Investor, expressly for use therein, or (ii) any violation
by the  Company  of any  federal,  state  or  common  law,  rule  or  regulation
applicable  to the  Company  in  connection  with  any  Registration  Statement,
Prospectus  or any  preliminary  prospectus,  or  any  amendment  or  supplement
thereto, and shall reimburse, as incurred, each of the foregoing persons for any
legal  and  any  other   expenses   reasonably   incurred  in  connection   with
investigating  or  defending  any such claims.  The  foregoing is subject to the
condition  that,  insofar  as the  foregoing  indemnities  relate to any  untrue
statement,  alleged untrue  statement,  omission or alleged omission made in any
preliminary  prospectus  or  Prospectus  which is  eliminated or remedied in any
Prospectus or amendment or supplement thereto,  the above indemnity  obligations
of the Company shall not inure to the benefit of any indemnified party if a copy
of such final  Prospectus  or  amendment  or  supplement  thereto  had been made
available  to  such  indemnified  party  and  was  not  sent  or  given  by such
indemnified  party at or  prior to the time  such  action  is  required  of such
indemnified  party  by the  1933  Act  and if  delivery  of such  Prospectus  or
amendment or  supplement  thereto  would have  eliminated  (or been a sufficient
defense  to) any  liability  of such  indemnified  party  with  respect  to such
statement  or omission.  Indemnity  under this Section 5(a) shall remain in full
force and effect  regardless  of any  investigation  made by or on behalf of any
indemnified  party and shall survive the permitted  transfer of the  Registrable
Securities.

          (b) Indemnification by Holder of Registrable Securities. In connection
with any registration pursuant to the terms of this Agreement, the Investor will
furnish to the Company in writing  such  information  as the Company  reasonably
requests  concerning the Investor or the proposed manner of distribution for use
in  connection  with any  Registration  Statement  or  Prospectus  and agrees to
indemnify  and hold  harmless,  to the  fullest  extent  permitted  by law,  the
Company,  its  directors  and  officers and each person who controls the Company
(within  the  meaning of the 1933 Act)  against  any  losses,  claims,  damages,
liabilities and expense  resulting from any untrue  statement of a material fact
or any  omission of a material  fact  required to be stated in the  Registration
Statement  or  Prospectus  or  preliminary  prospectus  or necessary to make the
statements therein not misleading,  to the extent, but only to the extent,  that


28366_1



<PAGE>


such untrue  statement or omission is contained in any information  furnished in
writing by the holder of Registrable  Securities to the Company specifically for
inclusion in such Registration Statement or Prospectus and that such information
was substantially  relied upon by the Company in preparation of the Registration
Statement or  Prospectus or any  amendment or  supplement  thereto.  In no event
shall the  liability of the Investor be greater in amount than the dollar amount
of the  proceeds  (net of all expense  paid by such holder and the amount of any
damages such holder has otherwise  been required to pay by reason of such untrue
statement or omission) received by the Investor upon the sale of the Registrable
Securities giving rise to such indemnification obligation.

          (c) Conduct of  Indemnification  Proceedings.  Any person  entitled to
indemnification hereunder shall (i) give prompt notice to the indemnifying party
of any claim with respect to which it seeks indemnification and (ii) permit such
indemnifying  party to assume the defense of such claim with counsel  reasonably
satisfactory  to the  indemnified  party;  provided that any person  entitled to
indemnification hereunder shall have the right to employ separate counsel and to
participate  in the  defense of such  claim,  but the fees and  expenses of such
counsel shall be at the expense of such person unless (a) the indemnifying party
has agreed to pay such fees or  expenses,  or (b) the  indemnifying  party shall
have  failed to assume the defense of such claim and employ  counsel  reasonably
satisfactory  to such  person  or (c) in the  reasonable  judgment  of any  such
person,  based upon written  advice of its  counsel,  a conflict of interest may
exist between such person and the indemnifying party with respect to such claims
(in which case, if the person  notifies the  indemnifying  party in writing that
such person elects to employ separate counsel at the expense of the indemnifying
party, the indemnifying  party shall not have the right to assume the defense of
such claim on behalf of such person); and provided, further, that the failure of
any  indemnified  party to give notice as provided  herein shall not relieve the
indemnifying party of its obligations hereunder,  except to the extent that such
failure to give notice shall materially  adversely affect the indemnifying party
in the  defense  of any such  claim or  litigation.  It is  understood  that the
indemnifying  party shall not, in  connection  with any  proceeding  in the same
jurisdiction,  be liable for fees or expenses of more than one separate  firm of
attorneys  (in addition to local  counsel) at any time for all such  indemnified
parties.  No indemnifying party will, except with the consent of the indemnified
party,  consent to entry of any judgment or enter into any settlement  that does
not  include as an  unconditional  term  thereof  the giving by the  claimant or
plaintiff to such  indemnified  party of a release from all liability in respect
to such claim or litigation.

          (d) Contribution.  If for any reason the indemnification  provided for
in the preceding  clauses (a) and (b) is unavailable to an indemnified  party or
insufficient  to hold it harmless,  other than as expressly  specified  therein,
then the  indemnifying  party shall  contribute to the amount paid or payable by
the indemnified  party as a result of such loss,  claim,  damage or liability in
such  proportion  as is  appropriate  to  reflect  the  relative  fault  of  the
indemnified  party and the  indemnifying  party,  as well as any other  relevant
equitable  considerations.  No  person  guilty of  fraudulent  misrepresentation


28366_1



<PAGE>


within  the  meaning  of  Section  11(f) of the 1933 Act  shall be  entitled  to
contribution from any person not guilty of such fraudulent misrepresentation. In
no event shall the contribution obligation of a holder of Registrable Securities
be greater in amount than the dollar amount of the proceeds (net of all expenses
paid by such holder and the amount of any damages such holder has otherwise been
required to pay by reason of such untrue or alleged untrue statement or omission
or alleged omission) received by it upon the sale of the Registrable  Securities
giving rise to such contribution obligation.

     6. Miscellaneous.

          (a)  Amendments  and Waivers.  This  Agreement  may be amended and the
Company may take any action herein prohibited, or omit to perform any act herein
required to be  performed  by it, only if the Company  shall have  obtained  the
written consent to such  amendment,  action or omission to act, of the Investor.
Notwithstanding the foregoing,  this Agreement shall automatically be amended in
accordance with the provisions of this Section 6.

          (b)  Notices.  All notices and other  communications  provided  for or
permitted  hereunder  shall be made as set forth in Section 9.4 of the  Purchase
Agreement.

          (c) Assignments and Transfers by Investor.  This Agreement and all the
rights  and  obligations  of the  Investor  hereunder  may  not be  assigned  or
transferred  to any  transferee  or  assignee  except as set forth  herein.  The
Investor may make such  assignment or transfer to any  transferee or assignee of
any Registrable  Securities,  provided, that (i) such transfer is made expressly
subject to this  Agreement and the  transferee  agrees in writing to be bound by
the terms and conditions  hereof,  and (ii) the Company is provided with written
notice of such assignment.

          (d) Assignments  and Transfers by the Company.  This Agreement may not
be assigned by the Company without the prior written consent of Investor, except
that without the prior written  consent of the  Investor,  but after notice duly
given,  the Company shall assign its rights and delegate its duties hereunder to
any  successor-in-interest  corporation,  and such  successor-in-interest  shall
assume such rights and duties,  in the event of a merger or consolidation of the
Company  with or into another  corporation,  or any merger or  consolidation  of
another  corporation  with  or  into  the  Company  which  results  directly  or
indirectly  in an aggregate  change in the ownership or control of more than 50%
of the voting rights of the equity securities of the Company, or the sale of all
or substantially all of the Company's assets.

          (e)  Benefits  of the  Agreement.  The  terms and  conditions  of this
Agreement  shall  inure to the  benefit  of and be binding  upon the  respective
permitted  successors  and assigns of the  parties.  Nothing in this  Agreement,
express or implied,  is intended to confer upon any party other than the parties
hereto  or  their  respective  successors  and  assigns  any  rights,  remedies,
obligations,  or  liabilities  under or by reason of this  Agreement,  except as
expressly provided in this Agreement.

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<PAGE>





          (f)  Counterparts.  This  Agreement  may be  executed  in two or  more
counterparts,  each of  which  shall be  deemed  an  original,  but all of which
together shall constitute one and the same instrument.

          (g)  Titles and  Subtitles.  The  titles  and  subtitles  used in this
Agreement  are  used  for  convenience  only  and  are not to be  considered  in
construing or interpreting this Agreement.

          (h)  Expenses.  If any  action  at law or in equity  is  necessary  to
enforce or interpret the terms of this Agreement,  the prevailing party shall be
entitled to reasonable  attorneys'  fees,  costs and necessary  disbursements in
addition to any other relief to which such party may be entitled.

          (i) Severability. If one or more provisions of this Agreement are held
to be unenforceable  under applicable law, such provision shall be excluded from
this Agreement and the balance of this Agreement shall be interpreted as if such
provision  were so excluded  and shall be  enforceable  in  accordance  with its
terms.

          (j) Further Assurances. The Parties shall execute and deliver all such
further  instruments  and  documents  and  take all such  other  actions  as may
reasonably be required to carry out the transactions  contemplated hereby and to
evidence the fulfillment of the agreements herein contained.

          (k) Entire  Agreement.  This Agreement is intended by the parties as a
final  expression of their agreement and intended to be a complete and exclusive
statement of the agreement and understanding of the parties hereto in respect of
the  subject  matter  contained  herein.  This  Agreement  supersedes  all prior
agreements and  understandings  between the parties with respect to such subject
matter.

          (l) Applicable Law. This Agreement shall be governed by, and construed
in  accordance  with,  the  laws of the  State of  Colorado  without  regard  to
principles of conflicts of law.



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


The Company:                        MEDICAL DYNAMICS, INC.


                                    By:
                                       -----------------------------------------
                                    Name:
                                    Title:



The Investor:                       THE TAIL WIND FUND, LTD.


                                    By:
                                       -----------------------------------------
                                    Name:
                                    Title:


28366_1









                               PURCHASE AGREEMENT


     THIS  PURCHASE  AGREEMENT  ("Agreement")  is  made  as of the  31st  day of
October, 1997 by and between Medical Dynamics, Inc., a Colorado corporation (the
"Company"),  and The Tail Wind Fund,  Ltd.,  a British  Virgin  Islands  limited
liability company (the "Investor").

     In  consideration of the mutual promises made herein and for other good and
valuable  consideration,   the  receipt  and  sufficiency  of  which  is  hereby
acknowledged, the parties hereto agree as follows:

     1.  Definitions.  The following  terms, as used herein,  have the following
meanings:

          1.1 "Affiliate"  means,  with respect to any person,  any other person
which  directly or indirectly  controls,  is  controlled  by, or is under common
control with, such person.

          1.2  "Agreements"  means  this  Agreement,   the  Registration  Rights
Agreement and the Escrow Agreement.

          1.3 "Closing" means the consummation of the transactions  contemplated
by this Agreement, which shall occur simultaneously with the execution hereof.

          1.4 "Common Stock" means the Common Stock,  par value $.001 per share,
of the Company.

          1.5 "Control" means the possession , direct or indirect,  of the power
to direct or cause the  direction  of the  management  and policies of a person,
whether through the ownership of voting securities, by contract or otherwise.

          1.6 "Debenture" means the Convertible Debenture issued to the Investor
in the aggregate  principal amount of $1,100,000,  the form of which is attached
hereto as Exhibit A.

          1.7 "Escrow  Agreement" means the Escrow Agreement dated as of October
1, 1997, as  supplemented  by a letter  agreement dated October 21, 1997, by and
among the Company,  Rochon  Capital Group,  Ltd. and LaSalle  National Bank, the
form of which is attached hereto as Exhibit B.


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          1.8 "Material  Adverse Effect" means a material  adverse effect on the
(i) condition (financial or otherwise),  business, assets, results of operations
or prospects of the Company and its subsidiaries, taken as a whole; (ii) ability
of the Company to perform  any of its  material  obligations  under the terms of
this Agreement;  or (iii) rights and remedies of the Investor under the terms of
this Agreement.

          1.9 "Person" means an  individual,  corporation,  partnership,  trust,
business  trust,   association,   joint  stock  company,  joint  venture,  pool,
syndicate,  sole  proprietorship,   unincorporated  organization,   governmental
authority or any other form of entity not specifically listed herein.

          1.10  "Registration  Rights  Agreement" means the Registration  Rights
Agreement  relating to the Common Stock  issuable  pursuant to the conversion of
the Debentures and the exercise of the Warrants,  in the form attached hereto as
Exhibit C, to be entered into as of the date hereof.

          1.11 "SEC" means the Securities and Exchange Commission.

          1.12 "SEC Filings" has the meaning set forth in Section 4.5.

          1.13 "Securities" means the Debentures, the Common Stock issuable upon
the  conversion  of, or payable  as accrued  interest  on, the  Debentures,  the
Warrants and the Common Stock issuable upon the exercise of Warrants.

          1.14 "1933 Act" means the Securities Act of 1933, as amended,  and the
rules and regulations promulgated thereunder.

          1.15 "1934 Act" means the Securities Exchange Act of 1934, as amended,
and the rules and regulations promulgated thereunder.

          1.16 "Warrant" means the Warrant issued to the Investor to purchase up
to an  aggregate of 84,615  shares of Common Stock at the exercise  price stated
therein, the form of which is attached hereto as Exhibit D.

     2. Purchase and Sale of Debenture  and Issuance of Warrant.  Subject to the
terms and conditions of this Agreement,  and in reliance on the  representations
and warranties  contained herein,  the Investor hereby purchases and the Company
hereby  sells and  issues to the  Investor  (a) the  Debenture  at an  aggregate
purchase  price of  $1,100,000,  issued and delivered  concurrently  herewith to
LaSalle  National Bank (the "Escrow  Agent") in accordance with the terms of the
Escrow Agreement,  in ten equal Debenture forms of $110,000 face amount each and
(b) the Warrant issued and delivered  concurrently  herewith to the Escrow Agent
in accordance with the terms of the Escrow Agreement. The Debentures and Warrant
will be released from escrow pursuant to the terms of the Escrow Agreement.


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     3. Payment of Purchase  Price.  The Investor shall cause the purchase price
to be paid in full by wire transfer to the Escrow Agent in  accordance  with the
terms of the Escrow Agreement.  The purchase price shall be released from escrow
pursuant to the terms of the Escrow Agreement.

     4.  Representations  and  Warranties  of the  Company.  The Company  hereby
represents and warrants to the Investor that:

          4.1 Organization,  Good Standing and  Qualification.  The Company is a
corporation duly  incorporated,  validly existing and in good standing under the
laws of the State of Colorado and has all requisite power and authority to carry
on its business and own its  properties as now conducted and owned.  The Company
and each of its  subsidiaries  is duly qualified or licensed to do business as a
foreign  corporation in good standing in each  jurisdiction in which the conduct
of its business or its ownership or leasing of property makes such qualification
or licensing necessary unless the failure to so qualify or be licensed would not
have a Material Adverse Effect.

          4.2  Authorization.  The Company has full power and  authority and has
taken all requisite action on the part of the Company,  its officers,  directors
and stockholders necessary for (i) the authorization,  execution and delivery of
the Agreements, (ii) the performance of all obligations of the Company hereunder
or  thereunder,  and (iii)  the  authorization,  issuance  (or  reservation  for
issuance) and delivery of the Securities.  The Agreements  constitute the legal,
valid and binding obligations of the Company, enforceable against the Company in
accordance with their terms.

          4.3 Valid Issuance.

             (a) The  Company  has  reserved  a  sufficient  number of shares of
Common Stock for issuance  upon  conversion of the Debenture and exercise of the
Warrant, and such shares, when issued in accordance with the respective terms of
the Debenture and the Warrant,  will be duly authorized,  validly issued,  fully
paid,  non-assessable  and free and clear of all encumbrances and  restrictions,
except for restrictions on transfer imposed by applicable securities laws.

             (b) The authorized capital stock of the Company consists, solely of
15,000,000  shares of Common Stock and 5,000,000  shares of preferred stock. The
Company  currently  has  9,255,736  shares  of  Common  Stock  and no  shares of
preferred stock issued and outstanding and there are no other outstanding shares
of capital stock of the Company. All of the issued and outstanding shares of the
Company's  Common  Stock have been duly  authorized  and validly  issued and are
fully paid,  nonassessable and free of preemptive rights. Except as set forth on
Schedule  4.3,  no one  is  entitled  to  preemptive  or  similar  statutory  or
contractual  rights with respect to any  securities  of the  Company.  Except as
disclosed on Schedule 4.3 to this Agreement,  there are no outstanding warrants,
options,  convertible securities or other rights,  agreements or arrangements of


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any character under which the Company is or may be obligated to issue any equity
securities  of any kind, or to transfer any equity  securities of any kind,  and
the Company and its  subsidiaries  do not have any present  plan or intention to
issue any equity securities of any kind, or to transfer any equity securities of
any kind owned by them.  Except as disclosed  on Schedule  4.3, the Company does
not know of any voting agreements, buy-sell agreements, option or right of first
purchase   agreements  or  other  agreements  of  any  kind  among  any  of  the
securityholders  of the Company relating to the securities held by them.  Except
as disclosed  on Schedule  4.3, the Company has not granted any Person the right
to require the Company to register any  securities of the Company under the 1933
Act,  whether  on a demand  basis or in  connection  with  the  registration  of
securities  of the  Company  for its own account or for the account of any other
Person.

             (c) There are currently  1,443,037  shares of Common Stock issuable
pursuant  to  outstanding  options  granted  by the  Company  to  employees  and
consultants;  1,200,000  shares of Common Stock issuable to Daniel  Richmond and
Chae Uk Kim pursuant to the  exercise of certain  options  contemplated  by that
Agreement  and  Plan of  Merger  dated  as of  October  23,  1997  (the  "Merger
Agreement") relating to the merger with Computer Age Dentist, Inc. ("CADI"); and
up to 250,000  shares of Common  Stock  issuable  upon the  exercise  of certain
options to be issued to certain  employees  of CADI.  The number of  outstanding
shares of Common Stock, as indicated above,  plus the number of shares of Common
Stock issuable pursuant to outstanding  rights and agreements on a fully diluted
basis,  assuming the complete  exercise or  conversion  of all rights to acquire
capital stock of the Company until such rights and subsequent rights incident to
exercise or  conversion  are fully  exercised  or  converted  for Common  Stock,
together  represent  12,148,773  shares of Common Stock immediately prior to the
Closing.

          4.4 Consents.  The execution,  delivery and performance by the Company
of the  Agreements and the offer,  issue and sale of the  Securities  require no
consent of, action by or in respect of, or filing with, any Person, governmental
body,  agency,  or official  other than filings that have been made  pursuant to
applicable  state  securities laws and post-sale  filings pursuant to applicable
state and federal  securities  laws and the  requirements  of Nasdaq,  which the
Company undertakes to file within the applicable time periods.

          4.5 Delivery of SEC Filings;  Business.  The Company has  delivered or
made  available to the Investor  true and correct  copies of (i) its most recent
Annual Report on Form 10-KSB, (ii) its quarterly reports on Form 10-QSB for each
fiscal quarter subsequent to that fiscal year end, and (iii) any other documents
filed with the Securities and Exchange  Commission  (the "SEC") since the filing
of its  most  recent  Annual  Report  on Form  10-KSB  (collectively,  the  "SEC
Filings").  The Company and its  subsidiaries  are engaged  only in the business
described in the SEC Filings and the SEC Filings contain a complete and accurate
description of the business of the Company and its subsidiaries.


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          4.6 Use of  Proceeds.  The  proceeds  of the  sale  of the  Securities
hereunder shall be used by the Company for working  capital,  operating  capital
and, to the extent  available,  costs  associated  with the  acquisition  by the
Company of Computer Age Dentist,  Inc. pursuant to the agreement described fully
on Schedule 4.3 hereto.

          4.7 No Material  Adverse Change.  Except as set forth in Schedule 4.7,
since the filing of the Company's most recent Annual Report on Form 10-KSB or as
otherwise  identified  and described in subsequent  reports filed by the Company
pursuant to the 1934 Act, there has not been:

             (i) any change in the consolidated assets,  liabilities,  financial
condition  or  operating  results  of the  Company  from that  reflected  in the
financial  statements  included in the Company's most recent Quarterly Report on
Form 10-QSB,  except  changes in the ordinary  course of business which have not
had, in the aggregate, a Material Adverse Effect;

             (ii)  any   declaration   or  payment  of  any  dividend,   or  any
authorization or payment of any distribution, on any of the capital stock of the
Company, or any redemption or repurchase of any securities of the Company;

             (iii) any  material  damage,  destruction  or loss,  whether or not
covered by  insurance to any assets or  properties  of the Company or any of its
subsidiaries;

             (iv) any  waiver by the  Company  or any of its  subsidiaries  of a
valuable right or of a material debt owed to it;

             (v) any satisfaction or discharge of any lien, claim or encumbrance
or payment of any obligation by the Company or any of its  subsidiaries,  except
in the  ordinary  course of  business  and which is not  material to the assets,
properties,  financial  condition,  operating results or business of the Company
and its subsidiaries  taken as a whole (as such business is presently  conducted
and as it is proposed to be conducted);

             (vi) any material  change or  amendment  to a material  contract or
arrangement  by which the  Company  or any of their  subsidiaries  or any of its
assets or properties is bound or subject;

             (vii)  any  material  change  in any  compensation  arrangement  or
agreement  with any employee of the Company or any of its  subsidiaries  who now
earns,  or who would earn as a result of such change,  in excess of $100,000 per
annum or any other officer of the Company or any of its subsidiaries;

             (viii) any labor difficulties or labor union organizing  activities
with respect to employees of the Company or any of its subsidiaries;

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             (ix) any  transaction  entered  into by the  Company  or any of its
subsidiaries other than in the ordinary course of business; or

             (x) any other event or condition of any character  which might have
a Material Adverse Effect that is not reflected in the SEC Filings.

          4.8 SEC Filings; Material Contracts.

             (a) As of its filing  date,  each report  filed by the Company with
the SEC pursuant to the 1934 Act,  complied as to form in all material  respects
with the  requirements of the 1934 Act and did not contain any untrue  statement
of a material fact or omit to state any material fact necessary in order to make
the statements made therein,  in the light of the circumstances under which they
were made, not misleading.

             (b) Each registration  statement and any amendment thereto filed by
the Company  pursuant to the 1933 Act and the rules and regulations  thereunder,
as of the date such statement or amendment became effective, complied as to form
in all  material  respects  with  the 1933 Act and did not  contain  any  untrue
statement of a material  fact or omit to state any material  fact required to be
stated therein or necessary to make the statements  therein not misleading;  and
each  prospectus  filed  pursuant to Rule  424(b)  under the 1933 Act, as of its
issue date and as of the closing of any sale or securities  pursuant thereto did
not  contain  any  untrue  statement  of a  material  fact or omit to state  any
material fact  necessary in order to make the  statements  made therein,  in the
light of the circumstances under which they were made, not misleading.

             (c)  Except  as  listed  in  Schedule  4.8  hereto,  there  are  no
agreements  or  instruments  currently  in force and effect  that  constitute  a
"material  contract"  (as such term is defined in Item  601(b)(10) of Regulation
S-K) of the Company or that constitute a warrant,  option,  convertible security
or other  right,  agreement  or  arrangement  of any  character  under which the
Company is or may be obligated to issue any equity  security of any kind,  or to
transfer  any equity  security of any kind.  The Company  has  delivered  to the
Investor  prior  to the  Closing  full and  complete  copies  of all  agreements
indicated in Schedule 4.8 hereto.

          4.9 Disclosures.  No representation or warranty made under any Section
hereof and no information  furnished by the Company pursuant  hereto,  or in any
other  document,  certificate  or  statement  furnished  by the  Company  to the
Investor  or any  authorized  representative  of the  Investor,  pursuant to the
Agreements  or in  connection  therewith,  contains  any untrue  statement  of a
material fact or omits to state a material fact necessary to make the respective
statements  contained  herein or therein,  in light of the  circumstances  under
which the statements were made, not misleading.

          4.10  Registration  Rights.  The  registration  rights  granted to the
Investor pursuant to the Registration Rights Agreement are at least as favorable
to the Investor as those granted to any holder of any  securities of the Company
are to such holder.

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          4.11 No Breach,  Violation  or Default.  The  execution,  delivery and
performance of the  Agreements and the issuance and sale of the Securities  will
not result in a breach or  violation of any of the terms and  provisions  of, or
constitute  a default  under,  any  statute,  rule,  regulation  or order of any
governmental  agency  or  body  or  any  court,  domestic  or  foreign,   having
jurisdiction  over the Company or any  subsidiary of the Company or any of their
properties,  or any  agreement  or  instrument  to which the Company or any such
subsidiary is a party or by which the Company or any such subsidiary is bound or
to which any of the properties of the Company or any such subsidiary is subject,
or the  Certificate  of  Incorporation  or  By-Laws  of the  Company or any such
subsidiary.

          4.12 Tax Returns and Payments.  The Company and its subsidiaries  have
correctly  and timely  prepared and filed all tax returns  required to have been
filed by it with all appropriate federal,  state and local governmental agencies
and timely paid all taxes owed by them.  The  charges,  accruals and reserves on
the books of the Company and its subsidiaries in respect of taxes for all fiscal
periods are adequate in all material respects,  and there are no material unpaid
assessments  of the  Company or any  subsidiary  nor,  to the  knowledge  of the
Company,  any basis for the  assessment of any  additional  taxes,  penalties or
interest for any fiscal period or audits by any federal,  states or local taxing
authority  except such as which are not material.  All material  taxes and other
assessments  and levies  which the  Company or any  subsidiary  is  required  to
withhold or to collect for payment  have been duly  withheld and  collected  and
paid to the proper governmental entity or third party. There are no tax liens or
claims  pending or  threatened  against the Company or any  subsidiary or any of
their  respective  assets or  property.  There are no  outstanding  tax  sharing
agreements or other such arrangements  between the Company or any subsidiary and
any other corporation or entity.

          4.13 Title to Properties.  Except as disclosed in the SEC Filings, the
Company  and its  subsidiaries  have  good  and  marketable  title  to all  real
properties and all other  properties and assets owned by them, in each case free
from liens,  encumbrances  and defects  that would  materially  affect the value
thereof or  materially  interfere  with the use made or currently  planned to be
made thereof by them;  and except as  disclosed in the SEC Filings,  the Company
and its subsidiaries  hold any leased real or personal  property under valid and
enforceable  leases with no exceptions that would materially  interfere with the
use made or currently planned to be made thereof by them.

          4.14  Certificates,  Authorities  and  Permits.  The  Company  and its
subsidiaries  possess  adequate  certificates,  authorities or permits issued by
appropriate  governmental  agencies or bodies  necessary to conduct the business
now operated by them and have not received any notice of proceedings relating to
the  revocation or  modification  of any such  certificate,  authority or permit
that, if determined  adversely to the Company or any of its subsidiaries,  would
individually or in the aggregate have a Material Adverse Effect.


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          4.15 No Labor  Disputes.  No labor  dispute with the  employees of the
Company  or any  subsidiary  exists  or, to the  knowledge  of the  Company,  is
imminent that might have a Material Adverse Effect.

          4.16  Intellectual  Property.  The Company and its subsidiaries own or
possess  adequate  trademarks  and  trade  names  and have all  other  rights to
inventions,  know-how, patents,  copyrights,  confidential information and other
intellectual property  (collectively,  "Intellectual Property Rights"), free and
clear of all liens,  security  interests,  charges,  encumbrances,  equities and
other adverse claims, necessary to conduct the business now operated by them, or
presently  employed by them, and presently  contemplated to be operated by them,
and have not received any notice of  infringement  of or conflict  with asserted
rights of others with  respect to any  Intellectual  Property  Rights  that,  if
determined  adversely  to  the  Company  or  any  of  its  subsidiaries,   would
individually or in the aggregate have a Material Adverse Effect.  No proprietary
technology of any Person was used in the design or development by the Company of
(or otherwise  with respect to) any of the  Intellectual  Property  Rights which
technology was not properly acquired by the Company from such Person.

          4.17  Environmental  Matters.  Neither  the  Company  nor  any  of its
subsidiaries is in violation of any statute, rule, regulation, decision or order
of any governmental agency or body or any court,  domestic or foreign,  relating
to the use,  disposal or release of hazardous or toxic substances or relating to
the protection or restoration of the  environment or human exposure to hazardous
or toxic substances  (collectively,  "Environmental Laws"), owns or operates any
real  property   contaminated   with  any  substance  that  is  subject  to  any
Environmental  Laws,  is  liable  for any  off-site  disposal  or  contamination
pursuant to any  Environmental  Laws, or is subject to any claim relating to any
Environmental  Laws,  which violation,  contamination,  liability or claim would
individually or in the aggregate have a Material Adverse Effect; and the Company
is not aware of any pending investigation which might lead to such a claim.

          4.18 Litigation.  Except as disclosed in the SEC Filings, there are no
pending actions,  suits or proceedings against or affecting the Company,  any of
its  subsidiaries  or any of their  respective  properties  that,  if determined
adversely to the Company or any of its  subsidiaries,  would  individually or in
the aggregate have a Material  Adverse Effect or would  materially and adversely
affect  the  ability  of the  Company  to  perform  its  obligations  under this
Agreement,  or which are  otherwise  material  in the context of the sale of the
Securities;   and  to  the  Company's  knowledge,  no  such  actions,  suits  or
proceedings are threatened or contemplated.

          4.19 Financial  Statements.  The financial statements included in each
SEC Filing present fairly the consolidated financial position of the Company and
its  subsidiaries  as of the  dates  shown  and their  consolidated  results  of
operations and cash flows for the periods shown,  and such financial  statements
have  been  prepared  in  conformity  with  the  generally  accepted  accounting
principles applied on a consistent basis.

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          4.20 Insurance Coverage.  The Company and its subsidiaries maintain in
full  force and effect  insurance  coverage  that is  customary  for  comparably
situated  companies for the business being  conducted,  and properties  owned or
leased, by the Company and its subsidiaries, and the Company reasonably believes
such insurance coverage to be adequate against all liabilities, claims and risks
against which it is customary for comparably situated companies to insure.

          4.21  Compliance  with  Nasdaq  Continued  Listing  Requirements.  The
Company is in compliance with all applicable  Nasdaq Small Cap Market  continued
listing requirements.

     5.  Representations  and  Warranties of the Investor.  The Investor  hereby
represents and warrants to the Company that:

          5.1  Organization  and Existence.  The Investor is a validly  existing
limited liability company and has all requisite corporate power and authority to
invest in the  Securities  pursuant  to this  Agreement.  The  Investor is not a
resident of the United States or any state, district or territory thereof.

          5.2  Authorization.  The  execution,  delivery and  performance by the
Investor of the Agreements  have been duly  authorized  and the Agreements  will
each  constitute  the valid and  legally  binding  obligation  of the  Investor,
enforceable against the Investor in accordance with their terms.

          5.3 Purchase  Entirely for Own Account.  The Securities to be received
by such Investor  hereunder  will be acquired for  investment for the Investor's
own  account,  not as  nominee  or agent,  and not with a view to the  resale or
distribution of any part thereof,  and the Investor has no present  intention of
selling, granting any participation in, or otherwise distributing the same.

          5.4 Investment Experience.  The Investor acknowledges that it can bear
the economic risk and complete loss of its  investment in the Securities and has
such  knowledge  and  experience  in  financial  or business  matters that it is
capable  of  evaluating  the  merits  and risks of the  investment  contemplated
hereby.

          5.5 Disclosure of Information.  The Investor has had an opportunity to
ask questions and receive  answers from the Company  regarding the Company,  its
business and the terms and conditions of the offering of the Securities. Neither
such  inquiries  nor any  other due  diligence  investigation  conducted  by the
Investor  shall  modify,  amend or affect  the  Investor's  right to rely on the
Company's  representations  and  warranties  contained in this Agreement or made
pursuant to this Agreement.

          5.6  Restricted   Securities.   The  Investor   understands  that  the
Securities  are  characterized  as  "restricted  securities"  under the  federal
securities  laws  inasmuch  as they are being  acquired  from the  Company  in a


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transaction  not  involving  a public  offering  and that  under  such  laws and
applicable  regulations such securities may be resold without registration under
the 1933 Act only in certain limited circumstances.

          5.7 Legends.  It is understood  that,  until  registration  for resale
pursuant to the  Registration  Rights  Agreement,  certificates  evidencing  the
Securities may bear one or all of the following legends:

             (a) "These securities have not been registered under the Securities
Act of 1933 (the  "Act").  They may not be sold,  offered  for sale,  pledged or
hypothecated  in the absence of a registration  statement in effect with respect
to  the  securities  under  the  Act  or  an  exemption  from  the  registration
requirements of the Act."

             (b) If required by the  authorities of any state in connection with
the  issuance  of sale of the  Securities,  the  legend  required  by such state
authority.

             Upon  registration for resale pursuant to the  Registration  Rights
Agreement,  all certificates evidencing the Common Stock shall be issued free of
such restrictive legends.

          5.8  Accredited  Investor.  The Investor is an accredited  investor as
defined in Rule 501(a) of Regulation D, as amended, under the 1933 Act.

          5.9 No  General  Solicitation.  The  Investor  did  not  learn  of the
investment in the  Securities as a result of any public  advertising  or general
solicitation.

     6. Registration  Rights Agreement.  The parties  acknowledge and agree that
part of the  inducement  for the  Investor to enter into this  Agreement  is the
Company's  execution  and delivery of the  Registration  Rights  Agreement.  The
parties acknowledge and agree that simultaneously with the execution hereof, the
Registration  Rights  Agreement  is being duly  executed  and  delivered  by the
parties thereto.

     7. Covenants and Agreements of the Company.

          7.1 Rights of Investor upon Certain Sales. The Company agrees that for
so long as the  Debenture  is  outstanding,  it shall give thirty  days  advance
written  notice to the Investor  prior to any offer or sale of any of its equity
securities or any securities convertible into or exchangeable or exercisable for
such  securities.  In addition,  prior to the closing of any such sale for cash,
the Investor shall have the following rights, which must be exercised in writing
by the Investor  within ten business  days  following the receipt of notice from
the Company:

             (a) With  respect  to any sale which is to take place from the date
hereof   through  the  90-day  period   following  the  effective  date  of  the
registration  contemplated by the Registration  Rights  Agreement,  the Investor
shall  have the right to  require  the  Company  to redeem  the  Debenture  at a


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purchase  price  equal  to  115%  of the  outstanding  principal  amount  of the
Debenture,  plus unpaid accrued interest thereon. Funds for such redemption must
be paid directly to the Investor upon closing by the Company of such sale out of
the proceeds from such sale.

             (b) With  respect  to any sale which is to take place from the date
hereof  through  the  period of one year  following  the  effective  date of any
registration  contemplated by the Registration  Rights  Agreement,  the Investor
shall have the right to  participate  in such  offering and purchase such equity
securities  for the same  consideration  and on the same terms and conditions as
contemplated for such third-party sale.

The provisions of subparagraphs  (a) and (b) of this Section 7.1 shall not apply
in the event of the  non-public  offer and sale by the  Company of shares of its
Common  Stock for other  than  cash,  so long as the  Common  Stock so issued is
restricted from further  transfer or sale for a period of one year from the date
of such issuance.  The foregoing  notwithstanding,  there shall be excepted from
the operation of this provision up to 240,000 shares of the Company to be issued
by the Company in  connection  with the  Company's  acquisition  of Computer Age
Dentist, Inc., which shares shall be registered for resale by the Company within
the twelve months following the date of this Agreement.

          7.2  Limitation  on  Acquisitions  by Company.  Commencing on the date
hereof and  continuing  for a period of one year following the effective date of
the registration  contemplated by the Registration Rights Agreement, the Company
agrees  that it  shall  not,  directly  or  indirectly,  in one or a  series  of
transactions,  purchase  all or  substantially  all of the assets of, or greater
than a majority of the outstanding  securities of any entity having an after-tax
loss in excess of $100,000  for the most recent  four fiscal  quarters  from the
closing  date of any such  acquisition  by the Company  (or the earlier  date on
which the Company  makes any  payment,  in cash,  stock or kind,  in  connection
therewith), without obtaining the prior written consent of the Investor.

          7.3 Opinion of Counsel. The Company has delivered, simultaneously with
the execution and delivery of this Agreement, the opinion of Friedlob Sanderson,
its counsel, in the form attached hereto as Exhibit E.

          7.4  Reservation  of Common Stock  Pursuant to Conversion of Debenture
and Exercise of Warrants.  The Company hereby agrees to at all times reserve and
keep available out of its authorized but unissued shares of Common Stock, solely
for the purpose of  permitting  conversion  of the Debenture and exercise of the
Warrant,  such number of shares of Common Stock as shall from time to time equal
1.5 times the number of shares  sufficient to permit the complete  conversion of
the Debenture plus the number of shares of Common Stock as shall be necessary to
permit the exercise of the Warrant in accordance  with the  respective  terms of
the Debenture and the Warrant.


28368_1



<PAGE>



          7.5 Reports.  The Company  will furnish to the Investor the  following
reports:

             (a) Quarterly Reports. As soon as available and in any event within
45 days after the end of each fiscal quarter of the Company,  the Company's Form
10-QSB or, in the absence of a Form 10-QSB,  consolidated  balance sheets of the
Company  and  its  subsidiaries  as at the end of such  period  and the  related
consolidated  statements of operations,  stockholders' equity and cash flows for
such period and for the portion of the  Company's  fiscal year ended on the last
day of such  quarter,  all in  reasonable  detail and  certified  by a principal
financial  officer  of the  Company to have been  prepared  in  accordance  with
generally  accepted  accounting  principles,   subject  to  year-end  and  audit
adjustments.

             (b) Annual Reports. As soon as available and in any event within 90
days after the end of each fiscal year of the Company, the Company's Form 10-KSB
or, in the absence of a Form 10-KSB,  consolidated balance sheets of the Company
and its  subsidiaries  as at the end of such year and the  related  consolidated
statements of earnings,  stockholders'  equity and cash flows for such year, all
in  reasonable  detail  and  accompanied  by the  report  on  such  consolidated
financial  statements of an independent  certified public accountant selected by
the Company and reasonably satisfactory to the Investor.

             (c) Securities Filings. As promptly as practicable and in any event
within  five days  after the same are  issued or filed,  copies of (i) all press
releases  issued  by the  Company  or any  subsidiary,  and all  notices,  proxy
statements,  financial  statements,  reports and documents as the Company or any
subsidiary  shall send or make  available  generally to its  stockholders  or to
financial  analysts,  and (ii) all periodic and special  reports,  documents and
registration  statements  (other  than on Form  S-8)  which the  Company  or any
subsidiary  furnishes or files, or any officer or director of the Company or any
of its subsidiaries (in such person's  capacity as such) furnishes or files with
the SEC.

             (d) Material Adverse Effects. As promptly as practicable and in any
event  within  five days  after any  executive  officer of the  Company  obtains
knowledge  of the  existence  of any  condition  or  event  (including,  without
limitation,  the filing of any  litigation  against or the  commencement  of any
proceeding or investigation involving the Company or any subsidiary),  which has
resulted in, or could  reasonably  be expected to result in, a Material  Adverse
Effect,  written  notice  specifying  in  reasonable  detail  the nature of such
condition  or event and what  action the Company  proposes to take with  respect
thereto.

             (e) Other  Information.  Such  other  information  relating  to the
Company or its  subsidiaries as from time to time may reasonably be requested by
the Investor  provided the Company  produces  such  information  in its ordinary
course of business.

28368_1



<PAGE>




          7.6 No  Conflicting  Agreements.  The Company  will not,  and will not
permit its  subsidiaries  to, take any action,  enter into any agreement or make
any commitment  which would  conflict or interfere in any material  respect with
the obligations to the Investor under the Agreements.

          7.7 Insurance.  The Company shall, and shall cause each subsidiary to,
have in full force and effect (a) insurance  reasonably  believed to be adequate
on all assets and activities of a type customarily  insured,  covering  property
damage  and  loss of  income  by  fire  or  other  casualty,  and (b)  insurance
reasonably  believed to be adequate  protection against all liabilities,  claims
and risks against which it is customary for companies  similarly situated as the
Company and the subsidiaries to insure.

          7.8 Compliance with Laws. The Company will use reasonable efforts, and
will cause each of its subsidiaries to use reasonable  efforts, to comply in all
material  respects with all  applicable  laws,  rules,  regulations,  orders and
decrees of all governmental authorities, except to the extent non-compliance (in
one instance or in the aggregate) would not have a Material Adverse Effect.

          7.9 Corporate Governance. For so long as the Convertible Debenture, or
any portion thereof,  is outstanding and/or the Investor is the beneficial owner
of the Company's Common Stock, the Company:

             (a) Shall distribute to its shareholders copies of an annual report
containing  audited  financial  statements of the Company and its subsidiaries a
reasonable period of time prior to the Company's annual meeting of shareholders;

             (b) Shall  maintain a minimum of two  independent  directors on its
board of directors;

             (c) Shall  hold an annual  meeting of  shareholders  each and every
year;

             (d) Shall  solicit  proxies and provide  proxy  statements  for all
meetings of shareholders;

             (e) From and after  February  22, 1998,  shall  obtain  shareholder
approval of (i) a plan or arrangement pursuant to which stock may be acquired by
officers or  directors  of the Company  (except  for  warrants or rights  issued
generally to  shareholders of the Company or broadly based plans or arrangements
including  other  employees of the  Company);  (ii) an issuance of the Company's
securities  when the  issuance  will  result  in a change of  control;  (iii) an
issuance of the  Company's  securities  in connection  with the  acquisition  of
another  company if  shareholder  approval of such  issuance  is required  under
applicable Nasdaq rules; and (iv) any other issuance of the Company's securities
if  shareholder  approval of such issuance is required under  applicable  Nasdaq
rules.

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<PAGE>




          7.10 Additional  Authorized Capital. The Company hereby agrees that it
shall recommend to its  shareholders,  and seek to obtain from its shareholders,
approval  of an increase in the  authorized  capital  stock of the Company to at
least 20,000,000 shares of Common Stock, which approval shall be sought no later
than the 1998 annual  meeting of  shareholders  of the Company to be held before
July 1, 1998.

     8.  Survival.  All  representations,  warranties,  covenants and agreements
contained in this Agreement shall be deemed to be  representations,  warranties,
covenants  and  agreements as of the date hereof and shall survive the execution
and  delivery of this  Agreement  for a period of five years and six months from
the date of this Agreement;  provided, however, that the provisions contained in
Section 7 hereof shall survive in accordance therewith.

     9. Miscellaneous.

          9.1  Successors  and Assigns.  This  Agreement  may not be assigned by
either party without the prior written consent of the other party hereto, except
that without the prior  written  consent of the  Company,  but after notice duly
given,  the Investor may assign its rights and delegate its duties  hereunder to
an  Affiliate,  and without the prior  written  consent of  Investor,  but after
notice duly given,  the  Company may assign its rights and  delegate  its duties
hereunder to any  successor-in-interest  corporation in the event of a merger or
consolidation of the Company with or into another corporation,  or any merger or
consolidation  of another  corporation  with or into the Company  which  results
directly or  indirectly  in an aggregate  change in the  ownership or control of
more than 50% of the voting rights of the equity  securities of the Company,  or
the sale of all or  substantially  all of the  Company's  assets.  The terms and
conditions of this  Agreement  shall inure to the benefit of and be binding upon
the respective permitted successors and assigns of the parties.  Nothing in this
Agreement,  express or implied,  is intended to confer upon any party other than
the  parties  hereto or their  respective  successors  and  assigns  any rights,
remedies,  obligations,  or  liabilities  under or by reason of this  Agreement,
except as expressly provided in this Agreement.

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

          9.3  Titles and  Subtitles.  The  titles  and  subtitles  used in this
Agreement  are  used  for  convenience  only  and  are not to be  considered  in
construing or interpreting this Agreement.

          9.4  Notices.  Unless  otherwise  provided,  any  notice  required  or
permitted  under this  Agreement  shall be given in writing  and shall be deemed
effectively given upon personal delivery to the party to be notified, or if sent
by telex or telecopier, upon receipt of the correct answer back, or upon deposit
with the United States Post Office,  by  registered  or certified  mail, or upon


28368_1



<PAGE>


deposit  with an  overnight  air  courier,  in each  case  postage  prepaid  and
addressed  to the party to be notified  at the  address as  follows,  or at such
other address as such party may designate by ten days' advance written notice to
the other party:

                           If to the Company:

                                    Medical Dynamics, Inc.
                                    99 Inverness Drive East
                                    Englewood, CO 80112
                                    Attn:  Van A. Horsley
                                    Telephone:  303/790-2990
                                    Facsimile:   303/799-1378

                                    with a copy to:

                                    Friedlob Sanderson et al.
                                    1400 Genarm Place
                                    Denver, CO 80202
                                    Attn:  Herrick Lidstone, Jr.
                                    Telephone:  303/571-1400
                                    Facsimile:   303/595-3159

                           If to the Investor:

                                    The Tail Wind Fund, Ltd.
                                    Windermere House
                                    404 East Bay Street
                                    P.O. Box SS-5539
                                    Nassau, Bahamas
                                    Telephone:
                                    Facsimile:

                                    with a copy to:

                                    The Tail Wind Fund, Ltd.
                                    c/o European American Securities, Inc.
                                    One Regent Street, 4th Floor
                                    London SW1Y 4NS
                                    England
                                    Attn:  David Crook
                                    Telephone:  44-171-468-7660
                                    Facsimile:   44-171-468-7657


28368_1



<PAGE>



                                    and with a copy to:

                                    Bryan Cave LLP
                                    700 Thirteenth Street, N.W.
                                    Washington, D.C.  20005
                                    Attn:  LaDawn Naegle
                                    Telephone:  202/508-6046
                                    Facsimile:   202/508-6200

          9.5 Expenses.  The Company  shall pay all costs and expenses  incurred
with respect to the  negotiation,  execution,  delivery and  performance  of the
Agreements,  including,  without limitation, the fees of Bryan Cave LLP, counsel
to the Investor, in an amount up to $10,000.

          9.6 Amendments and Waivers.  Any term of this Agreement may be amended
and the observance of any term of this Agreement may be waived (either generally
or in a particular  instance and either  retroactively or  prospectively),  only
with the written  consent of the  Company and the  Investor.  Any  amendment  or
waiver  effected in accordance  with this  paragraph  shall be binding upon each
holder of any Securities purchased under this Agreement at the time outstanding,
each future holder of all such securities, and the Company.

          9.7 Severability. If one or more provisions of this Agreement are held
to be unenforceable  under applicable law, such provision shall be excluded from
this Agreement and the balance of this Agreement shall be interpreted as if such
provision  were so excluded  and shall be  enforceable  in  accordance  with its
terms.

          9.8 Entire  Agreement.  This  Agreement,  including  the  Exhibits and
Schedules hereto,  and the Registration  Rights Agreement  constitute the entire
agreement among the parties hereof with respect to the subject matter hereof and
thereof and supersede all prior  agreements  and  understandings,  both oral and
written,  between the parties  with  respect to the  subject  matter  hereof and
thereof.

          9.9 Further Assurances. The parties shall execute and deliver all such
further  instruments  and  documents  and  take all such  other  actions  as may
reasonably be required to carry out the transactions  contemplated hereby and to
evidence the fulfillment of the agreements herein contained.

          9.10  Applicable  Law.  This  Agreement  shall  be  governed  by,  and
construed in accordance  with, the laws of the State of Colorado  without regard
to principles of conflicts of laws.


28368_1



<PAGE>


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



The Company:

                                             MEDICAL DYNAMICS, INC.


                                             By:
                                                --------------------------------
                                             Name:  Van A. Horsley
                                             Title:     President



The Investor:                                THE TAIL WIND FUND, LTD.


                                             By:
                                                --------------------------------
                                             Name:
                                             Title:



28368_1







                     FORM OF CONVERTIBLE DEBENTURE                 1997CD -
                     -----------------------------                 
001

$110,000                                                       October 31, 1997

     FOR VALUE RECEIVED,  the undersigned,  Medical  Dynamics,  Inc., a Colorado
corporation (the "Company"), promises to pay to the order of The Tail Wind Fund,
Ltd., or the holder hereof, on October 31, 2000 ("Due Date"),  the principal sum
of One  Hundred  Ten  Thousand  Dollars  ($110,000),  or,  if less,  the  unpaid
principal  amount  outstanding  at such time,  in either case  together with all
accrued and unpaid interest thereon.

     The Company  also  promises  to pay  interest  semi-annually  from the date
hereof on the unpaid principal amount hereof at a rate of eight percent (8%) per
annum.  Interest on this  Debenture  shall be computed on the basis of a 360-day
year. Interest through the last day of the preceding calendar semi-annual period
shall  be  payable  on or  before  the  fifth  day of each  April  and  October,
commencing in April 1998.


     1. Payments

     All payments by the Company  hereunder  shall be payable in lawful money of
the United States in immediately  available funds by wire transfer to an account
designated in writing by the Investor, or in the case of conversion of principal
and,  at the option of the  Company,  payment of  interest,  in shares of common
stock of the Company, par value $.001 per share (the "Common Stock"),  valued at
the  Conversion  Price (for the conversion of principal) and at the Market Price
(for the payment of  interest),  not later than 5:00 p.m.,  Mountain time on the
day when due to the holder at the following address:

                                    The Tail Wind Fund, Ltd.
                                    c/o Mees Pierson Fund Services
                                    Fourth Floor Russell House
                                    Dublin 2 IRELAND 1M14LE
                                    United Kingdom

or at such other place as the holder  hereof may from time to time  designate in
writing  to the  Company.  Whenever  any  payment  to be made  pursuant  to this
Debenture  shall be stated to be due on a public  holiday,  Saturday  or Sunday,
such payment may be made on the next succeeding  business day. Such extension of
time  shall not in such case be  included  in  computing  interest,  if any,  in
connection with such payment.


28364_1



<PAGE>



     2. Conversion of Debenture

          (a) From time to time,  until all unpaid  principal  and  accrued  and
unpaid interest under this Debenture is paid, the holder of this Debenture shall
have the right to convert (i) at any time from and after January 29, 1998, up to
one-third of the principal  amount of this Debenture,  (ii) at any time from and
after  February 28, 1998,  up to an aggregate  of  two-thirds  of the  principal
amount of this  Debenture,  and (iii) at any time from and after March 30, 1998,
all of the  principal  amount of this  Debenture,  in whole or in part,  into an
amount of duly authorized,  fully-paid and non-assessable shares of Common Stock
determined  by  dividing  such  principal  amount  to be  so  converted  by  the
Conversion Price (as hereinafter defined), and upon the terms and subject to the
conditions  hereinafter specified in this Section 2. Any unpaid principal amount
of this Debenture outstanding on October 31, 2000, together with any accrued and
unpaid  interest  thereon,  shall  automatically  convert to Common Stock at the
Conversion Price (defined below).

          (b) In order to convert this  Debenture  into shares of Common  Stock,
the holder shall:  (i) fax a copy of the fully executed  notice of conversion in
the form attached  hereto  ("Notice of Conversion") to the Company at the office
of the Company or its designated  transfer  agent,  if any, for the  Debentures,
which notice shall  specify the amount of the  Debenture  to be  converted,  the
applicable Conversion Price, and a calculation of the number of shares of Common
Stock issuable upon such  conversion  (together with a copy of the first page of
this  Debenture)  prior to 5:00  p.m.,  Mountain  time (the  "Conversion  Notice
Deadline") on the date of conversion specified on the Notice of Conversion;  and
(ii) surrender the original Debenture being converted,  along with a copy of the
Notice of  Conversion  as soon as  practicable  thereafter  to the office of the
Company or the transfer agent, if any, for the  Debentures;  provided,  however,
that the Company  shall not be obligated to issue  certificates  evidencing  the
shares of Common Stock issuable upon such conversion unless either the Debenture
is  delivered  to the Company or its transfer  agent as provided  above,  or the
holder  notifies the Company or its transfer agent that such original  Debenture
has  been  lost,  stolen  or  destroyed.  In the  case  of a  dispute  as to the
calculation  of the  Conversion  Price,  the Company shall  promptly  issue such
number of shares  of Common  Stock  that are not  disputed  in  accordance  with
subparagraph  (c) below.  The Company shall submit the disputed  calculations to
its outside  accountant via facsimile within two (2) business days of receipt of
the Notice of Conversion. The accountant shall audit the calculations and notify
the  Company  and the holder of the results no later than 48 hours from the time
it receives the disputed  calculations.  The accountant's  calculation  shall be
deemed conclusive absent manifest error.

          (c) Upon the surrender of the Debenture as described above accompanied
by the  Notice of  Conversion,  the  Company  shall  issue  and,  within two (2)
business days (the  "Delivery  Period") after such surrender (or, in the case of
lost,  stolen or  destroyed  Debenture,  after  provision  of an  agreement  and
indemnification  by the holder to the  Company),  direct its  transfer  agent to
deliver to or upon the order of the  holder (i) that  number of shares of Common

28364_1


<PAGE>

Stock for the  portion of the  Debenture  converted  as shall be  determined  in
accordance  herewith and (ii) a new  Debenture  representing  the balance of the
principal  amount of the Debenture  surrendered  but not  converted,  if any. In
addition to any other remedies available to the holder, including actual damages
and/or  equitable  relief,  the Company shall pay to the holder $250 in cash for
the third day beyond such  Delivery  Period  that the  Company  fails to deliver
Common  Stock  issuable  upon  surrender  of  the  Debenture  with a  Notice  of
Conversion, and $500 per day in cash for each day thereafter, until such time as
the earlier of the date that the Company has delivered all such Common Stock and
the tenth day beyond such  Delivery  Period.  Such cash amount  shall be paid to
such  holder by the fifth day of the month  following  the month in which it has
accrued.  In the event the Company  fails to deliver  such Common Stock prior to
the expiration of the ten (10) business day period after the Delivery Period for
any  reason  (whether  due  to a  requirement  of  law or a  stock  exchange  or
otherwise),  such holder shall be entitled to (in addition to any other remedies
available to the holder)  Conversion Default Payments in accordance with Section
2(h) hereof beginning on the expiration of such ten (10) business day period.

          (d) If any conversion of this  Debenture  would result in a fractional
share of Common  Stock or the  right to  acquire  a  fractional  share of Common
Stock,  such fractional share shall be disregarded and Company shall pay in cash
to the holder the value of such  fractional  share based on the Market  Price on
the Conversion Date.

          (e) The "Conversion Date" shall be the date specified in the Notice of
Conversion,  provided (i) that the advance copy of the Notice of  Conversion  is
faxed to the Company before 5:00 p.m.,  Mountain  time, on the Conversion  Date,
and (ii) that the  original  Debenture is  surrendered  along with a copy of the
Notice of  Conversion  as soon as  practicable  thereafter  to the office of the
Company or the transfer agent for the Debentures. The person or persons entitled
to received the shares of Common Stock issuable upon conversion shall be treated
for all purposes as the record  holder or holders of such  securities  as of the
Conversion Date and all rights with respect to the Debenture  fully  surrendered
shall forthwith terminate except the right to receive the shares of Common Stock
or other securities or property issuable on such conversion.

          (f) The  Conversion  Price per share (  "Conversion  Price")  at which
shares of Common Stock shall be issuable upon conversion of this Debenture shall
be equal to 100% of the Market Price on the business day  immediately  preceding
the Conversion  Date;  provided,  however,  that the Conversion  Price shall not
exceed $3.45.  "Market  Price" shall mean the average of the two lowest  closing
bid prices of the Common  Stock as reported by The Nasdaq  Stock Market over the
sixty trading day period ending on the date in question.

          (g) In order to prevent  dilution  of the  conversion  rights  granted
under this Section 2, the Conversion  Price shall be subject to adjustment  from
time to time as follows:

28364_1

<PAGE>


             (i) If the  Common  Stock  shall  be  changed  into  the  same or a
different number of shares of any class or classes of capital stock,  whether by
capital  reorganization,  recapitalization,  reclassification or otherwise or in
the event of a merger  or  consolidation  of the  Company  with or into  another
corporation  or the sale of  substantially  all of the  Company's  assets to any
other  person,  then and in each such event the holder of this  Debenture  shall
have the right  thereafter to convert this Debenture or any portion thereof into
the kind and amount of shares of capital stock and other securities and property
receivable upon such reorganization, recapitalization, reclassification, merger,
consolidation,  sale or other  change  by a holder  of the  number  of shares of
Common Stock into which this  Debenture  might have been  converted  immediately
prior  to  such  reorganization,  recapitalization,   reclassification,  merger,
consolidation, sale or change.

             (ii) If any event occurs of the type contemplated by the provisions
of  this  Section  2(g)  but  not  expressly  provided  for by  such  provisions
(including,  without  limitation,  the  granting of stock  appreciation  rights,
phantom stock rights or other rights with equity  features),  then the Company's
board of directors shall make an appropriate  adjustment in the Conversion Price
so as to protect the rights of the holder of this  Debenture;  provided  that no
such  adjustment  shall  increase the Conversion  Price as otherwise  determined
pursuant to this  Section  2(g) or decrease the number of shares of Common Stock
issuable upon conversion of this Debenture.

             (iii)  Immediately upon any adjustment of the Conversion Price, the
Company  shall give  written  notice  thereof  to the holder of this  Debenture,
setting  forth in  reasonable  detail and  certifying  the  calculation  of such
adjustment.

          (h) The Company  covenants  that it will at all times reserve and keep
available  out of its  authorized  Common  Stock,  solely  for  the  purpose  of
effecting  the  conversion  of this  Debenture,  such number of shares of Common
Stock  as shall  from  time to time be  issuable  upon  the  conversion  of this
Debenture;  and if at any time the number of authorized  but unissued and issued
but not outstanding  shares of the Common Stock, on a fully diluted basis, shall
not be sufficient to effect the  conversion of this  Debenture at the Conversion
Price then in effect,  the  Company  will take such  corporate  action as may be
necessary to increase its authorized but unissued or issued but not  outstanding
shares of the Common Stock to such number of shares as shall be  sufficient  for
such purpose.  The Company covenants that all shares of Common Stock which shall
be so issuable, when issued upon conversion of this Debenture, shall be duly and
validly issued, fully-paid and non-assessable. If at any time a holder submits a
Conversion Notice, the Company does not have sufficient  authorized but unissued
shares of Common Stock  available to effect such  conversion in accordance  with
the  provisions of this Section 2 (a  "Conversion  Default"),  the Company shall
issue to the holder all of the shares of Common  Stock  which are  available  to
effect  such  conversion.  The  number  of  shares  included  in the  Notice  of
Conversion  which exceeds the amount which is then  convertible  into  available
shares of Common Stock (the "Excess Amount") shall,  notwithstanding anything to
the  contrary  contained  herein,  not  be  convertible  into  Common  Stock  in

28364_1

<PAGE>



accordance  with the terms hereof until (and at the holder's  option at any time
after) the date additional  shares of Common Stock are authorized by the Company
to permit such conversion, at which time the Conversion Price in respect thereof
shall be the lesser of (i) the Conversion  Price on the Conversion  Default Date
(as defined below) and (ii) the Conversion  Price on the Conversion Date elected
by the holder in respect  thereof.  The Company shall pay to the holder payments
("Conversion  Default  Payments")  for a  Conversion  Default  in the  amount of
(N/365),  multiplied by the sum of the principal  amount of the Debenture sought
to be  converted,  multiplied  by the  Excess  Amount  on the  first  day of the
Conversion Default (the "Conversion Default Date"), multiplied by .36, where N =
the  number  of  days  from  the  Conversion  Default  Date  to  the  date  (the
"Authorization  Date") that the Company authorizes a sufficient number of shares
of Common Stock to effect  conversion of the full amount of the  Debenture.  The
Company  shall send  notice to the  holder of the  authorization  of  additional
shares  of Common  Stock,  the  Authorization  Date and the  amount of  holder's
accrued Conversion Default Payments. The accrued Conversion Default Payments for
each calendar  month shall be paid in cash or shall be  convertible  into Common
Stock at the Conversion Price, at the holder's option, as follows:

             (i) In the event holder  elects to take such payment in cash,  cash
payment  shall be made to holder by the  fifth  day of the month  following  the
month in which it has accrued; and

             (ii) In the event  holder  elects to take  such  payment  in Common
Stock,  the holder may convert  such  payment  amount  into Common  Stock at the
Conversion  Price (as in effect at the time of Conversion) at any time after the
fifth day of the month following the month in which it has accrued in accordance
with the terms of this Section 2.

Nothing  herein shall limit the holder's  right to pursue actual damages for the
Company's failure to maintain a sufficient number of authorized shares of Common
Stock, and each holder shall have the right to pursue all remedies  available at
law or in equity (including a decree of specific  performance  and/or injunctive
relief).

          (i)  Notwithstanding  anything to the contrary  herein,  conversion of
this Debenture shall not be permitted, and the Company shall not pay any amounts
due to the holder of this  Debenture in the form of shares of Common  Stock,  if
such conversion or payments would result in the holder of this Debenture  owning
more than 4.99% of the issued and  outstanding  shares of Common Stock following
conversion or payment (such  percentage to be calculated in accordance with Rule
13d-3 promulgated under the Securities Exchange Act of 1934).

          (j) The issuance of  certificates  for shares of the Common Stock upon
the  conversion  of this  Debenture  shall be made without  charge to the holder
hereof for any issuance tax in respect of the issuance of such  certificates  or
other cost incurred by the Company in connection  with such  conversion  and the
related issuance of shares of Common Stock.


28364_1

<PAGE>



     3.  Covenant.  The  Company  agrees at all times  that it will not,  by any
amendment  of  the  Company's   Articles  of   Incorporation,   or  through  any
consolidation, merger, reorganization, transfer of assets, dissolution, issue or
sale of securities or any other voluntary  action,  seek to avoid the observance
or performance  hereof, but will at all times take such actions as are necessary
or appropriate in order to protect the rights of the holder of this Debenture.

     4. Events of Default

          (a) In addition to the Default provisions provided above in respect of
Conversion, an "Event of Default" shall exist if any of the following occurs and
is continuing:

             (i)  Failure to make any  payment of  principal  or interest on the
Debenture when such payment is due, other than the final payment due on the Due
Date;

             (ii)  Failure to make  payment  of all  outstanding  principal  and
interest on the Debenture on the Due Date;

             (iii) Failure to comply with any other  provision of this Debenture
and such failure continues for more than five (5) business days after the holder
hereof has given written notice of such failure to the Company;

             (iv) The Common  Stock is not listed or included  for  quotation on
The Nasdaq  SmallCap Market System,  The Nasdaq National Market System,  the New
York Stock Exchange or the American Stock Exchange;

             (v) Any levy,  seizure,  attachment,  execution or similar  process
shall be levied on a material portion of the Company's property; or

             (vi) A receiver,  custodian,  liquidator or trustee of the Company,
or of any of the  property of the Company,  is appointed by court order;  or the
Company is  adjudicated  bankrupt or  insolvent;  or any of the  property of the
Company is sequestered  by court order;  or a petition to reorganize the Company
under any  bankruptcy,  reorganization  or  insolvency  law is filed against the
Company and is not  dismissed  within sixty (60) days after such filing;  or the
Company files a voluntary  bankruptcy  petition or requesting  reorganization or
arrangement under any provision of any bankruptcy,  reorganization or insolvency
law, or consents to the filing of any petition against it under any such law; or
the Company  makes a general  assignment  for the benefit of its  creditors,  or
admits in writing its  inability to pay its debts  generally as they become due,
or  consents to the  appointment  of a receiver,  trustee or  liquidator  of the
Company or of all or any part of the property of the Company.



28364_1

<PAGE>


          (b) If an Event of Default  specified in Section 4(a)(i) exists,  then
this  Debenture  shall  accrue  additional  interest  on all  unpaid  amounts of
principal  and interest from the date of the Event of Default at a rate equal to
the greater of (i) fifteen  percent  (15%) per annum or (ii) the highest  amount
allowable by law.

          (c) If an Event of Default other than an Event of Default specified in
Section  4(a)(i)  exists,  then the holder of this  Debenture  may  exercise any
right,  power or remedy  conferred  upon it by law,  and shall have the right to
declare by written notice the entire  principal and all interest accrued on such
Debenture to be, and such Debenture  shall thereupon  become,  forthwith due and
payable without any declaration,  presentment,  demand, protest or notice of any
kind. The Company shall forthwith pay to the holder of this Debenture the entire
principal and interest accrued on such Debenture.

     5.  Registration.  The initial  holder of this Debenture is entitled to the
benefit of certain  registration rights in respect of the shares of Common Stock
into which this Debenture may be coverted pursuant to that  Registration  Rights
Agreement dated effective October 31, 1997.

     6. Miscellaneous

          (a) Every  maker,  endorser  and  guarantor  of this  Debenture or the
obligation  represented by this Debenture waives  presentment,  demand,  notice,
protest  and all other  demands or notices,  in  connection  with the  delivery,
acceptance, endorsement,  performance, default or enforcement of this Debenture,
assents to any and all extensions or postponements of the time of payment or any
other indulgences,  including without limitation, the release or substitution of
collateral,  and  agrees  to be  bound  by  all of the  terms  contained  in the
Debenture.

          (b) No delay or omission by the holder hereof in exercising  any right
or remedy  hereunder  shall  constitute a waiver of any such right or remedy.  A
waiver on one occasion shall not operate as a bar to or waiver of any such right
or remedy on any future occasion.

          (c) The  Company  shall  pay all  reasonable  costs  and  expenses  of
collection,  including attorney's fees, incurred or paid by the holder hereof in
enforcing this Debenture and the obligations evidenced hereby.

          (d) This  Debenture  may be amended  only by written  agreement of the
Company and the holder hereof.

          (e) This  Debenture  is  governed by the laws of the State of Colorado
and is executed as a sealed instrument as of the date first above written.


     IN WITNESS  WHEREOF,  the Company has caused this  Debenture to be executed
and  delivered  by its duly  authorized  officer  as of the day and  year  first
written above.


                                    MEDICAL DYNAMICS, INC.


                                     By:
                                        ----------------------------------------
                                     Title:
                                           -------------------------------------
[Corporate Seal]

28364_1



<PAGE>




                             MEDICAL DYNAMICS, INC.
                              CONVERTIBLE DEBENTURE
                              NOTICE OF CONVERSION


MEDICAL DYNAMICS, INC.
99 Inverness Drive East
Englewood, CO  80112

     The  undersigned   hereby  elects  to  convert   $_______________   of  the
Convertible  Debenture  represented by the within Convertible Debenture for, and
to  acquire  thereunder  _______________  shares  of Common  Stock  ("Conversion
Shares") as  provided  for  therein,  and  requests  that  certificates  for the
Conversion Shares be issued as follows:

                           -------------------------------
                           Name

                           --------------------------------
                           Address
                           --------------------------------

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

                           --------------------------------
                           Federal Tax Identification No.
                           or Social Security No.

and, if the amount of the principal of the Convertible Debenture being converted
hereby shall not be all of the principal amount of such  Convertible  Debenture,
that a new Convertible Debenture

28364_1



<PAGE>


for the balance of such Convertible  Debenture be issued forthwith to the holder
or the  undersigned's  Assignee as below  indicated and delivered to the address
stated below.

Dated:
      ---------------------------

                               Signature:
                                         ------------------------------

                                         ------------------------------
                                         Name (please print)
                                         ------------------------------
                                         Address

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


                                         ------------------------------
                                         Federal Identification or
                                         Social Security No.


                               Note:     The above signature must correspond
                                         with the name of the registered holder
                                         as written on the first page of the
                                         Convertible Debenture in every
                                         particular, without alteration or
                                         enlargement or any change whatever,
                                         unless the Convertible Debenture has
                                         been assigned.




28364_1








                          REGISTRATION RIGHTS AGREEMENT

     THIS  REGISTRATION  RIGHTS  AGREEMENT,  dated as of  October  1, 1997 (this
"Agreement"),  is  made  by and  between  MEDICAL  DYNAMICS,  INC.,  a  Colorado
corporation (the "Company"),  and the persons named on the signature page hereto
(the "Shareholders").

                               W I T N E S E T H:

     WHEREAS,  upon the terms and subject to the conditions of the Agreement and
Plan of Merger dated as of October 1, 1997 between Computer Age Dentist, Inc., a
California corporation ("CADI"),  and the Company (the "Merger Agreement"),  the
Company has agreed to issue to the undersigned (the "Shareholders"), as the sole
holders of outstanding  common stock of CADI,  shares  ("Merger  Shares") of the
Company's common stock; and

     WHEREAS,  to induce the  Shareholders to approve the Merger  Agreement as a
holder  of CADI  common  stock,  the  Company  has  agreed  to  provide  certain
registration rights under the Securities Act of 1933, as amended,  and the rules
and regulations thereunder, or any similar successor statute (collectively,  the
"Securities  Act"),  and applicable  state  securities  laws with respect to the
Merger Shares.

     NOW,  THEREFORE,  in consideration of the premises and the mutual covenants
contained  herein and other good and  valuable  consideration,  the  receipt and
sufficiency of which are hereby  acknowledged,  the Company and the Shareholders
hereby agree as follows:

          1. Definitions.

          (a) As used in this  Agreement,  the  following  terms  shall have the
following meanings:

          (i) "Investor"  means the  Shareholders and any transferee or assignee
who agrees to become bound by the provisions of this Agreement.

          (ii)  "Register,"   "Registered,"  and   "Registration"   refer  to  a
registration  effected  by  preparing  and filing a  Registration  Statement  or
Statements in compliance  with the Securities Act and pursuant to Rule 415 under
the Securities Act or any successor rule providing for offering  securities on a
continuous  basis ("Rule 415"), and the declaration or ordering of effectiveness
of such  Registration  Statement by the United  States  Securities  and Exchange
Commission (the "SEC").

          (iii) "Registrable Securities" means 240,000 of the Merger Shares.




                                        1

<PAGE>




          (iv)  "Registration  Statement" means a registration  statement of the
Company under the Securities Act.

          (b) As used in this  Agreement,  the term  Investor  includes (i) each
Investor (as defined  above) and (ii) each person who is a permitted  transferee
or assignee of the Registrable Securities.

          (c)  Capitalized  terms used herein and not otherwise  defined  herein
shall have the respective meanings set forth in the Merger Agreement.

          2. Registration.

          (a)  Mandatory  Registration.  Within  12  months  following  the date
hereof, the Company shall prepare and file with the SEC and use its best efforts
to obtain  effectiveness  of, a Registration  Statement on Form S-3 covering not
fewer than the Registrable Securities.

          3. Obligations of the Company.  In connection with the registration of
the Registrable Securities, the Company shall do each of the following.

          (a)  Prepare  and file  with  the SEC a  Registration  Statement  with
respect to not less than  Registrable  Securities  as provided in Section  2(a),
above, and thereafter use its best efforts to cause such Registration  Statement
to become effective;

          (b)  Prepare  and  file  with  the  SEC  such  amendments   (including
post-effective amendments) and supplements to the Registration Statement and the
prospectus  used  in  connection  with  the  Registration  Statement  as  may be
necessary  to  keep  the   Registration   effective  at  all  times  during  the
Registration  Period,  and,  during the  Registration  Period,  comply  with the
provisions  of  the  Securities  Act  with  respect  to the  disposition  of all
Registrable  Securities  of the Company  covered by the  Registration  Statement
until such time as all of such  Registrable  Securities have been disposed of in
accordance  with the intended  methods of  disposition  by the seller or sellers
thereof as set forth in the Registration Statement;

          (c) Furnish to each Investor whose Registrable Securities are included
in the Registration  Statement and its legal counsel  identified to the Company,
(i) promptly after the same is prepared and publicly distributed, filed with the
SEC, or received by the  Company,  one (1) copy of the  Registration  Statement,
each  preliminary  prospectus and  prospectus,  and each amendment or supplement
thereto, and (ii) such number of copies of a prospectus, including a preliminary
prospectus, and all amendments and supplements thereto and such other documents,
as such Investor may reasonably  request in order to facilitate the  disposition
of the Registrable Securities owned by such Investor;




                                        2

<PAGE>




          (d) Use reasonable efforts, at the Investors' expense, to (i) register
and qualify the Registrable  Securities  covered by the  Registration  Statement
under  such  other  securities  or blue  sky laws of such  jurisdictions  as the
Investors being offered reasonably  request and in which significant  volumes of
shares of Common Stock are traded,  (ii) prepare and file in those jurisdictions
such amendments  (including  post-effective  amendments) and supplements to such
registrations   and   qualifications   as  may  be  necessary  to  maintain  the
effectiveness  thereof at all times during the Registration  Period,  (iii) take
such other  actions as may be  necessary  to  maintain  such  registrations  and
qualifications in effect at all times during the Registration  Period,  and (iv)
take all  other  actions  reasonably  necessary  or  advisable  to  qualify  the
Registrable Securities for sale in such jurisdictions;  provided,  however, that
the  Company  shall not be required in  connection  therewith  or as a condition
thereto to (A)  qualify to do business  in any  jurisdiction  where it would not
otherwise be required to qualify but for this Section 3(d),  (B) subject  itself
to general  taxation  in any such  jurisdiction,  (C) file a general  consent to
service of process in any such  jurisdiction,  (D) provide any undertakings that
cause more than nominal  expense or burden to the Company or (E) make any change
in its  articles of  incorporation  or by-laws,  which in each case the Board of
Directors of the Company  determines to be contrary to the best interests of the
Company and its stockholders;

          (e) As promptly as  practicable  after  becoming  aware of such event,
notify  each  Investor  of the  happening  of any event of which the Company has
knowledge,  as a result of which the  prospectus  included  in the  Registration
Statement, as then in effect, includes an untrue statement of a material fact or
omits to state a material  fact  required to be stated  therein or  necessary to
make the statements therein, in light of the circumstances under which they were
made, not misleading,  and use its best efforts promptly to prepare a supplement
or amendment to the Registration  Statement or other appropriate filing with the
SEC to correct such untrue statement or omission, and deliver a number of copies
of such supplement or amendment to each Investor as such Investor may reasonably
request;

          (f) As promptly as  practicable  after  becoming  aware of such event,
notify each Investor who holds Registrable Securities being sold of the issuance
by the SEC of a Notice of  Effectiveness  or any notice of  effectiveness or any
stop  order  or  other  suspension  of the  effectiveness  of  the  Registration
Statement at the earliest possible time;

          (i) Cooperate with the Investors who hold Registrable Securities being
offered to facilitate the timely  preparation and delivery of  certificates  for
the Registrable  Securities to be offered pursuant to the Registration Statement
and  enable  such  certificates  for the  Registrable  Securities  to be in such
denominations  or amounts as the case may be, as the  Investors  may  reasonably
request and registered in such names as the Investors may request;  and,  within
three  (3)  business  days  after  a  Registration   Statement   which  includes
Registrable  Securities  is ordered  effective  by the SEC,  the  Company  shall
deliver,  and shall cause legal counsel  selected by the Company to deliver,  to
the transfer agent for the Registrable  Securities (with copies to the Investors
whose  Registrable  Securities are included in such  Registration  Statement) an
appropriate instruction and opinion of such counsel; and




                                        3

<PAGE>




          (j) Take all  other  reasonable  actions  necessary  to  expedite  and
facilitate  disposition by the Investors of the Registrable  Securities pursuant
to the Registration Statement.

          4.  Obligations of the Investors.  In connection with the registration
of  the  Registrable   Securities,   the  Investors  shall  have  the  following
obligations:

          (a) It  shall  be a  condition  precedent  to the  obligations  of the
Company to complete the registration  pursuant to this Agreement with respect to
the  Registrable  Securities of a particular  Investor that such Investor  shall
furnish to the  Company  such  information  regarding  itself,  the  Registrable
Securities held by it, and the intended method of disposition of the Registrable
Securities  held  by  it,  as  shall  be  reasonably   required  to  effect  the
registration of such Registrable  Securities and shall execute such documents in
connection  with such  registration  as the Company may reasonably  request.  At
least five days prior to the first  anticipated  filing date of the Registration
Statement, the Company shall notify each Investor of the information the Company
requires from each such Investor (the "Requested  Information") if such Investor
elects to have any of such  Investor's  Registrable  Securities  included in the
Registration  Statement.  If at least two (2) business  days prior to the filing
date the Company has not received the Requested  Information from an Investor (a
"Non-Responsive Investor"), then the Company may file the Registration Statement
without including Registrable Securities of such Non-Responsive Investor;

          (b) Each Investor by such  Investor's  acceptance  of the  Registrable
Securities  agrees to cooperate with the Company as reasonably  requested by the
Company  in  connection  with the  preparation  and  filing of the  Registration
Statement hereunder, unless such Investor has notified the Company in writing of
such  Investor's  election  to  exclude  all  of  such  Investor's   Registrable
Securities from the Registration Statement; and

          (c) Each  Investor  agrees  that,  upon receipt of any notice from the
Company of the  happening of any event of the kind  described in Section 3(e) or
3(f),  above,  such  Investor  will  immediately   discontinue   disposition  of
Registrable  Securities  pursuant to the  Registration  Statement  covering such
Registrable  Securities  until  such  Investor's  receipt  of the  copies of the
supplemented or amended prospectus  contemplated by Section 3(e) or 3(f) and, if
so directed by the Company,  such Investor  shall deliver to the Company (at the
expense of the Company) or destroy (and deliver to the Company a certificate  of
destruction)  all  copies  in  such  Investor's  possession,  of the  prospectus
covering  such  Registrable  Securities  current  at the time of receipt of such
notice.

          5. Expenses of  Registration.  The Company will be required to pay all
reasonable expenses incurred pursuant to this agreement not including,  however:
(i)  underwriting   discounts  and  commissions   incurred  in  connection  with
registrations,  filings,  qualifications  or sale of the Registrable  Securities





                                        4

<PAGE>


pursuant to Section 3; (ii) the  expenses of blue sky  qualification;  and (iii)
the expenses of any attorney, accountant, investment advisor or other consultant
retained by the  Shareholders,  or either of them, in  connection  with this the
Registration Statement or this agreement.

          6.  Indemnification.  In the  event  any  Registrable  Securities  are
included in a Registration Statement under this Agreement:

          (a) To the extent  permitted by law, the Company  will  indemnify  and
hold  harmless  each  Investor  who  holds  such  Registrable  Securities,   the
directors,  if any, of such  Investor,  the officers,  if any, of such Investor,
each  person,  if any,  who  controls  any  Investor  within the  meaning of the
Securities Act or the Exchange Act (each, an "Indemnified Person"),  against any
losses,  claims,  damages,  liabilities or expenses (joint or several)  incurred
(collectively,  "Claims")  to which  any of them may  become  subject  under the
Securities  Act,  the  Exchange  Act or  otherwise,  insofar as such  Claims (or
actions or proceedings,  whether  commenced or threatened,  in respect  thereof)
arise out of or are based upon any of the  following  statements,  omissions  or
violations  in  the  Registration  Statement,  or any  post-effective  amendment
thereof, or any prospectus included therein: (i) any untrue statement or alleged
untrue statement of a material fact contained in the  Registration  Statement or
any  post-effective  amendment  thereof or the  omission or alleged  omission to
state therein a material fact required to be stated therein or necessary to make
the  statements  therein not  misleading,  (ii) any untrue  statement or alleged
untrue  statement of a material fact contained in any preliminary  prospectus if
used prior to the effective date of such Registration Statement, or contained in
the final  prospectus  (as amended or  supplemented,  if the  Company  files any
amendment thereof or supplement thereto with the SEC) or the omission or alleged
omission to state  therein any material  fact  necessary to make the  statements
made therein,  in light of the circumstances  under which the statements therein
were made,  not  misleading or (iii) any  violation or alleged  violation by the
Company of the Securities Act, the Exchange Act, any state securities law or any
rule or  regulation  under the  Securities  Act,  the  Exchange Act or any state
securities  law (the matters in the  foregoing  clauses (i) through (iii) being,
collectively, "Violations"). The Company shall reimburse the Investors, promptly
as such  expenses are  incurred  and are due and payable,  for any legal fees or
other reasonable  expenses incurred by them in connection with  investigating or
defending  any such Claim.  Notwithstanding  anything to the contrary  contained
herein, the  indemnification  agreement contained in this Section 6(a) shall not
(I) apply to a Claim  arising out of or based upon a Violation  which  occurs in
reliance upon and in  conformity  with  information  furnished in writing to the
Company  by or on  behalf  of  any  Indemnified  Person  expressly  for  use  in
connection  with  the  preparation  of the  Registration  Statement  or any such
amendment  thereof or supplement  thereto,  if such  prospectus  was timely made
available by the Company  pursuant to Section 3(b) hereof;  (II) with respect to
any  preliminary  prospectus,  inure to the benefit of any such person from whom
the person  asserting any such Claim purchased the  Registrable  Securities that
are the  subject  thereof  (or to the  benefit  of any person  controlling  such





                                        5

<PAGE>


person) if the untrue  statement or omission of material  fact  contained in the
preliminary  prospectus  was  corrected  in the  prospectus,  as then amended or
supplemented,  if such  prospectus  was timely  made  available  by the  Company
pursuant to Section 3(b) hereof;  (III) be available to the extent such Claim is
based on a failure  of the  Investor  to deliver  or cause to be  delivered  the
prospectus  made  available  by the  Company;  or (IV) apply to amounts  paid in
settlement of any Claim if such settlement is effected without the prior written
consent of the Company, which consent shall not be unreasonably  withheld.  Each
Investor  will  indemnify  the Company and its  officers,  directors  and agents
against  any claims  arising out of or based upon a  Violation  which  occurs in
reliance upon and in  conformity  with  information  furnished in writing to the
Company, by or on behalf of such Investor,  expressly for use in connection with
the preparation of the Registration  Statement,  subject to such limitations and
conditions as are applicable to the  Indemnification  provided by the Company to
this Section 6. Such indemnity shall remain in full force and effect  regardless
of any  investigation  made by or on behalf of the Indemnified  Person and shall
survive the transfer of the Registrable Securities by the Investors.

          (b) Promptly  after receipt by an  Indemnified  Person or  Indemnified
Party  under  this  Section  6 of  notice  of the  commencement  of  any  action
(including any  governmental  action),  such  Indemnified  Person or Indemnified
Party  shall,  if a  Claim  in  respect  thereof  is  to  be  made  against  any
indemnifying  party under this  Section 6, deliver to the  indemnifying  party a
written notice of the commencement thereof and the indemnifying party shall have
the right to  participate  in,  and,  to the  extent the  indemnifying  party so
desires,  jointly with any other indemnifying party similarly noticed, to assume
control  of the  defense  thereof  with  counsel  mutually  satisfactory  to the
indemnifying  party and the Indemnified  Person or the Indemnified Party, as the
case may be; provided,  however, that an Indemnified Person or Indemnified Party
shall  have the right to retain its own  counsel  with the  reasonable  fees and
expenses to be paid by the indemnifying  party, if, in the reasonable opinion of
counsel retained by the indemnifying  party, the  representation by such counsel
of the Indemnified  Person or Indemnified Party and the indemnifying party would
be inappropriate  due to actual or potential  differing  interests  between such
Indemnified  Person or Indemnified Party and any other party represented by such
counsel in such  proceeding.  In such event,  the Company shall pay for only one
separate legal counsel for the  Investors;  such legal counsel shall be selected
by the Investors  holding a majority in interest of the  Registrable  Securities
included in the Registration  Statement to which the Claim relates.  The failure
to deliver written notice to the indemnifying  party within a reasonable time of
the commencement of any such action shall not relieve such indemnifying party of
any liability to the Indemnified  Person or Indemnified Party under this Section
6, except to the extent that the indemnifying party is prejudiced in its ability
to defend such action. The  indemnification  required by this Section 6 shall be
made by  periodic  payments  of the  amount  thereof  during  the  course of the
investigation or defense, as such expense, loss, damage or liability is incurred
and is due and payable.





                                        6

<PAGE>



          7. Contribution.  To the extent any indemnification by an indemnifying
party is prohibited or limited by law, the indemnifying party agrees to make the
maximum contribution with respect to any amounts for which it would otherwise be
liable  under  Section  6 to the  fullest  extent  permitted  by law;  provided,
however,  that (a) no contribution shall be made under  circumstances  where the
maker would not have been liable for  indemnification  under the fault standards
set  forth in  Section  6; (b) no  seller of  Registrable  Securities  guilty of
fraudulent  misrepresentation  (within  the  meaning  of  Section  11(f)  of the
Securities Act) shall be entitled to contribution from any seller of Registrable
Securities  who was not  guilty of such  fraudulent  misrepresentation;  and (c)
contribution by any seller of Registrable  Securities shall be limited in amount
to the net amount of  proceeds  received  by such  seller  from the sale of such
Registrable Securities.

          8. Reports under Exchange Act. With a view to making  available to the
Investors the benefits of Rule 144  promulgated  under the Securities Act or any
other  similar  rule or  regulation  of the SEC that may at any time  permit the
Investors to sell  securities of the Company to the public without  registration
("Rule 144"), the Company, in addition to its other agreements contained herein,
agrees to:

          (a) make and keep  public  information  available,  as those terms are
understood and defined in Rule 144;

          (b)  file  with the SEC in a  timely  manner  all  reports  and  other
documents required of the Company under the Securities Act and the Exchange Act;
and

          (c) furnish to each Investor so long as such Investor owns Registrable
Securities,  promptly upon request,  (i) a written statement by the Company that
it has complied with the reporting  requirements of Rule 144, the Securities Act
and the Exchange Act, (ii) a copy of the most recent annual or quarterly  report
of the Company and such other  reports and documents so filed by the Company and
(iii)  such  other  information  as may be  reasonably  requested  to permit the
Investors to sell such securities pursuant to Rule 144 without registration.

          9. No  Assignment.  The rights under this agreement are not assignable
except by will or the laws of descent and distribution.

          10. Amendment of Registration  Rights. Any provision of this Agreement
may be amended and the observance  thereof may be waived (either generally or in
a particular instance and either retroactively or prospectively),  only with the
written  consent of the Company and Investors who hold a majority in interest of
the Registrable Securities.  Any amendment or waiver effected in accordance with
this Section 10 shall be binding upon each Investor and the Company.





                                        7

<PAGE>



          11. Miscellaneous.

          (a) A  person  or  entity  is  deemed  to be a holder  of  Registrable
Securities  whenever  such  person or entity  owns of  record  such  Registrable
Securities.  If  the  Company  receives  conflicting  instructions,  notices  or
elections  from  two or more  persons  or  entities  with  respect  to the  same
Registrable  Securities,  the Company shall act upon the basis of  instructions,
notice  or  election  received  from the  registered  owner of such  Registrable
Securities.

          (b) Notices  required or permitted to be given  hereunder  shall be in
writing and shall be deemed to be sufficiently  given when personally  delivered
(by  hand,  by  courier,  by  telephone  line  facsimile  transmission,  receipt
confirmed,  or other means) or sent by certified mail, return receipt requested,
properly addressed and with proper postage pre-paid (i) if to the Company, at 99
Inverness Drive East, Englewood, CO 80110, Attn: Van A. Horsley, President, with
a copy to Herrick K. Lidstone,  Jr., Esq.,  Friedlob  Sanderson Raskin Paulson &
Tourtillott,  LLC, 1400 Glenarm Place, Suite 300, Denver, Colorado 80202 (ii) if
to the Investors, at the address set forth under their names, below, with a copy
to Warren J. Kessler,  Esq.,  Kessler & Kessler,  2029 Century Park East,  Suite
1520, Los Angeles, California 90067, or at such other address as each such party
furnishes by notice given in accordance  with this Section  11(b),  and shall be
effective,  when  personally  delivered,  upon  receipt  and,  when  so  sent by
certified  mail,  four calendar days after deposit with the United States Postal
Service.

          (c)  Failure of any party to exercise  any right or remedy  under this
Agreement or otherwise,  or delay by a party in exercising such right or remedy,
shall not operate as a waiver thereof.

          (d) This Agreement  shall be governed by and interpreted in accordance
with the laws of the State of Colorado. In any litigation brought to enforce the
provisions  hereof,  each party shall bear its own  attorneys  fees and expenses
unless a court, in the exercise of its discretion, awards such costs and fees to
the prevailing party. A facsimile transmission of this signed Agreement shall be
legal and binding on all parties hereto.  This Agreement may be signed in one or
more  counterparts,  each of which shall be deemed an original.  The headings of
this  Agreement are for  convenience of reference and shall not form part of, or
affect the interpretation of, this Agreement. If any provision of this Agreement
shall be  invalid or  unenforceable  in any  jurisdiction,  such  invalidity  or
unenforceability  shall  not  affect  the  validity  or  enforceability  of  the
remainder of this Agreement or the validity or  enforceability of this Agreement
in any other  jurisdiction.  This Agreement may be amended only by an instrument
in writing  signed by the party to be charged with  enforcement.  This Agreement
supersedes all prior agreements and understandings among the parties hereto with
respect to the subject matter hereof.





                                        8

<PAGE>



          (e) This Agreement  constitutes the entire agreement among the parties
hereto with respect to the subject  matter  hereof.  There are no  restrictions,
promises, warranties or undertakings,  other than those set forth or referred to
herein. This Agreement  supersedes all prior agreements and understandings among
the parties hereto with respect to the subject matter hereof.

          (f) This  Agreement  shall inure to the benefit of and be binding upon
the permitted successors and assigns of each of the parties hereto.

          (g) All pronouns and any  variations  thereof refer to the  masculine,
feminine or neuter, singular or plural, as the context may require.

          (h) The headings in this  Agreement are for  convenience  of reference
only and shall not limit or otherwise affect the meaning thereof.

          (i) This Agreement may be executed in two or more  counterparts,  each
of which shall be deemed an original but all of which shall  constitute  one and
the same agreement.  This Agreement,  once executed by a party, may be delivered
to the other party hereto by telephone line facsimile  transmission of a copy of
this Agreement bearing the signature of the party so delivering this Agreement.








                                        9

<PAGE>


          IN WITNESS WHEREOF,  the parties have caused this Agreement to be duly
executed by their  respective  officers  thereunto duly authorized as of the day
and year first above written.

                             MEDICAL DYNAMICS, INC.


October 23, 1997                By:
                                   ---------------------------------------
                                Van A. Horsley, President

                                [Shareholders]


October 23, 1997                ------------------------------------------
                                Dan Richmond
                                6500 Barid Avenue
                                Reseda, California 91335

                                Number of Registrable Securities: 60,000 shares



October 23, 1997                ------------------------------------------
                                Chae Uk Kim
                                3231 Cheviot Vista Place
                                #205
                                Los Angeles, California 90034

                                Number of Registrable Securities: 60,000 shares


October 23, 1997                ------------------------------------------
                                James DeVico, Jr.
                                2546 Westwood Boulevard
                                Los Angeles, California 90064

                                Number of Registrable Securities: 120,000 shares





                                       10








     THIS WARRANT HAS NOT BEEN  REGISTERED  UNDER THE SECURITIES ACT OF 1933, AS
AMENDED,  AND MAY NOT BE  SOLD,  TRANSFERRED,  PLEDGED  OR  HYPOTHECATED  IN THE
ABSENCE OF A REGISTRATION  STATEMENT  COVERING THIS WARRANT UNDER SAID ACT OR AN
EXEMPTION FROM REGISTRATION UNDER SAID ACT.

     VOID AFTER 5:00 P.M. MOUNTAIN TIME ON OCTOBER 31, 2002 ("EXPIRATION DATE").


                             MEDICAL DYNAMICS, INC.

                      WARRANT TO PURCHASE 84,615 SHARES OF
                     COMMON STOCK, PAR VALUE $.001 PER SHARE

     This is to certify  that,  for VALUE  RECEIVED,  The Tail Wind  Fund,  Ltd.
("Warrantholder"),  is entitled to purchase,  subject to the  provisions of this
Warrant, from Medical Dynamics, Inc., a Colorado corporation ("Company"), at any
time not later than 5:00 P.M.,  Mountain  time,  on the  Expiration  Date, at an
exercise  price per share  equal to 120% of the Market  Price  (defined  below),
provided that in no event shall such amount be greater than $3.375 nor less than
the closing price of the Company's  Common Stock, par value $.001 per share (the
"Common  Stock") on the Closing  Date  (defined  below) (the  exercise  price in
effect  being  herein  called the  "Warrant  Price"),  84,615  shares  ("Warrant
Shares") of Common Stock. The number of Warrant Shares purchasable upon exercise
of this Warrant and the Warrant Price shall be subject to  adjustment  from time
to time as described  herein.  The "Market  Price" shall mean the average of the
two lowest  closing  bid prices of the Common  Stock as  reported  by The Nasdaq
Stock Market over the 60 calendar day period  immediately  preceding the Closing
Date.  The  "Closing  Date"  shall be that  date on which  the  Company  and the
Warrantholder  close the  transactions  contemplated by that Purchase  Agreement
dated as of October 31, 1997.

     Section 1. Registration.  The Company shall maintain books for the transfer
and registration of the Warrant.  Upon the initial issuance of the Warrant,  the
Company shall issue and register the Warrant in the name of the Warrantholder.

     Section 2. Transfers.  As provided  herein,  the Warrant may be transferred
only pursuant to a  registration  statement  filed under the  Securities  Act of
1933,  as  amended   ("Securities   Act")  or  an  exemption  from  registration
thereunder.  Subject to such restrictions,  the Company shall transfer from time
to time,  the Warrant,  upon the books to be  maintained by the Company for that
purpose, upon surrender thereof for transfer properly endorsed or accompanied by
appropriate  instructions for transfer upon any such transfer, and a new Warrant
shall be issued to the transferee and the surrendered  Warrant shall be canceled
by the Company.

28367_1

<PAGE>





     Section 3.  Exercise  of Warrant.  Subject to the  provisions  hereof,  the
Warrantholder  may  exercise  the  Warrant  in whole or in part at any time upon
surrender of the Warrant,  together with  delivery of the duly executed  Warrant
exercise form attached hereto (the "Exercise Agreement"),  to the Company during
normal business hours on any business day at the Company's  principal  executive
offices (or such other  office or agency of the Company as it may  designate  by
notice to the holder  hereof),  and upon (i) payment to the Company in cash,  by
certified  or  official  bank check or by wire  transfer  for the account of the
Company of the Warrant  Price for the Warrant  Shares  specified in the Exercise
Agreement or (ii) delivery to the Company of a written  notice of an election to
effect a "Cashless Exercise" (as defined below) for the Warrant Shares specified
in the Exercise Agreement. The Warrant Shares so purchased shall be deemed to be
issued to the holder  hereof or such holder's  designee,  as the record owner of
such shares, as of the close of business on the date on which this Warrant shall
have been surrendered (or evidence of loss, theft or destruction  thereof),  the
completed Exercise  Agreement shall have been delivered,  and payment shall have
been made for such  shares  as set forth  above.  Certificates  for the  Warrant
Shares so purchased,  representing  the aggregate  number of shares specified in
the  Exercise  Agreement,  shall be  delivered  to the  holder  hereof  within a
reasonable  time, not exceeding two (2) business days,  after this Warrant shall
have  been  so  exercised.  The  certificates  so  delivered  shall  be in  such
denominations  as may be requested by the holder  hereof and shall be registered
in the name of such  holder or such  other name as shall be  designated  by such
holder.  If this Warrant shall have been  exercised only in part,  then,  unless
this  Warrant has expired,  the Company  shall,  at its expense,  at the time of
delivery of such certificates,  deliver to the holder a new Warrant representing
the number of shares with respect to which this Warrant shall not then have been
exercised.

     To effect a Cashless Exercise,  the holder shall submit to the Company with
the  Exercise  Agreement,  written  notice of the  holder's  intention to do so,
including  a  calculation  of the number of shares of Common  Stock to be issued
upon  such  exercise  in  accordance  with the terms  hereof.  In the event of a
Cashless Exercise, in lieu of paying the Warrant Price in cash, the holder shall
surrender  this Warrant for that number of shares of Common Stock  determined by
multiplying the number of Warrant Shares to which it would otherwise be entitled
by a fraction,  the numerator of which shall be the difference  between the then
current Market Price per share of the Common Stock and the Exercise  Price,  and
the denominator of which shall be the then current Market Price per share of the
Common Stock. For this purpose,  the "Market Price" of the Common Stock shall be
the closing  price of the Common  Stock on the trading day first  preceding  the
date of the Exercise Agreement.

     To the extent  that any Warrant  Shares  remain  outstanding  at 5:01 P.M.,
Mountain  time on October  31,  2002,  such  outstanding  Warrant  Shares  shall
automatically  expire and be of no further  force and  effect,  and the  holders
thereof shall have no further right to exercise or transfer the same.


28367_1

<PAGE>



     Section 4. Compliance with the Securities Act of 1933. Neither this Warrant
nor the Common Stock issued upon exercise  hereof nor any other security  issued
or  issuable  upon  exercise  of this  Warrant  may be offered or sold except as
provided in this agreement and in conformity with the Securities Act of 1933, as
amended,  and then only  against  receipt of an agreement of such person to whom
such offer of sale is made to comply with the  provisions of this Section 4 with
respect to any resale or other  disposition  of such  security.  The Company may
cause the legend set forth on the first page of this  Warrant to be set forth on
each Warrant or similar legend on any security  issued or issuable upon exercise
of this Warrant, unless counsel for the Company is of the opinion as to any such
security that such legend is unnecessary.

     Section 5.  Payment of Taxes.  The Company will pay any  documentary  stamp
taxes  attributable to the initial  issuance of Warrant Shares issuable upon the
exercise  of the  Warrant;  provided,  however,  that the  Company  shall not be
required to pay any tax or taxes which may be payable in respect of any transfer
involved in the issue or delivery of any  certificates  for Warrant  Shares in a
name other than that of the registered holder of the Warrant in respect of which
such shares are issued,  and in such case,  the Company shall not be required to
issue or deliver any  certificate  for Warrant  Shares or any Warrant  until the
person requesting the same has paid to the Company the amount of such tax or has
established  to the  Company's  satisfaction  that such tax has been  paid.  The
holder shall be responsible  for income taxes due under federal or state law, if
any such tax is due.

     Section 6.  Mutilated  or Missing  Warrants.  In case the Warrant  shall be
mutilated,  lost, stolen, or destroyed,  the Company shall issue in exchange and
substitution of and upon  cancellation of the mutilated  Warrant,  or in lieu of
and  substitution  for the Warrant lost,  stolen or destroyed,  a new Warrant of
like tenor and for the  purchase  of a like number of Warrant  Shares,  but only
upon receipt of evidence  reasonably  satisfactory  to the Company of such loss,
theft or  destruction  of the  Warrant,  and with  respect to a lost,  stolen or
destroyed Warrant, reasonable indemnity or bond, if requested by the Company.

          Section 7. Reservation of Common Stock. The Company hereby  represents
and  warrants  that  there  have been  reserved,  and the  Company  shall at all
applicable times keep reserved, out of the authorized and unissued Common Stock,
a number of shares  sufficient  to  provide  for the  exercise  of the rights of
purchase  represented by the Warrant, and the Continental Stock Transfer & Trust
Company,  the transfer agent for the Common Stock ("Transfer Agent"),  and every
subsequent  transfer agent for the Common Stock or other shares of the Company's
capital  stock  issuable  upon the  exercise  of any of the  right  of  purchase
aforesaid  shall be irrevocably  authorized and directed at all times to reserve
such  number of  authorized  and  unissued  shares  of Common  Stock as shall be
requisite for such purpose.  The Company  agrees that all Warrant  Shares issued
upon  exercise  of  the  Warrant  shall  be,  at the  time  of  delivery  of the
certificates  for such Warrant Shares,  duly authorized,  validly issued,  fully
paid and non-assessable  shares of Common Stock of the Company. The Company will
keep a conformed  copy of this Warrant on file with the Transfer  Agent and with
every subsequent transfer agent


28367_1

<PAGE>


for the Common Stock or other shares of the  Company's  capital  stock  issuable
upon the  exercise of the rights of purchase  represented  by the  Warrant.  The
Company  will supply  from time to time the  Transfer  Agent with duly  executed
stock certificates required to honor the outstanding Warrant.

     Section 8. Warrant  Price.  The Warrant  Price,  subject to  adjustment  as
provided in Section 9, shall, if payment is made in cash or by certified  check,
be payable in lawful money of the United States of America.

     Section 9.  Adjustments.  Subject and  pursuant to the  provisions  of this
Section  9, the  Warrant  Price and  number of  Warrant  Shares  subject to this
Warrant  shall  be  subject  to  adjustment  from  time  to  time  as set  forth
hereinafter.  If the adjustment  provisions contained in this Section 9 are less
favorable to the holders of this Warrant than adjustment provisions available to
any other holder (the "Other  Holder") of convertible  securities of the Company
or  warrants,  options or similar  rights  exercisable  for Common  Stock of the
Company with respect to such securities  ("Other  Rights") are to any such Other
Holder, this Warrant shall be immediately and automatically amended, without the
requirement of any action by the holder or the Company, to provide the holder of
this Warrant with adjustment rights at least as favorable as such Other Rights.

          (a) If the  Company  shall at any time or from time to time  while the
Warrant is  outstanding,  pay a dividend  or make a  distribution  on its Common
Stock in shares of Common  Stock,  subdivide  its  outstanding  shares of Common
Stock into a greater number of shares or combine its  outstanding  shares into a
smaller number of shares or issue by  reclassification of its outstanding shares
of  Common  Stock  any  shares  of  its  capital  stock   (including   any  such
reclassification  in  connection  with a  consolidation  or  merger in which the
Company  is the  continuing  corporation),  then the  number of  Warrant  Shares
purchasable  upon  exercise  of the  Warrant  and the  Warrant  Price in  effect
immediately  prior to the date upon which such change  shall  become  effective,
shall be adjusted by the Company so that the Warrantholder thereafter exercising
the Warrant shall be entitled to receive the number of shares of Common Stock or
other capital stock which the  Warrantholder  would have received if the Warrant
had been exercised  immediately  prior to such event.  Such adjustment  shall be
made successively whenever any event listed above shall occur.

          (b) If any  capital  reorganization,  reclassification  of the capital
stock of the  Company,  consolidation  or merger  of the  Company  with  another
corporation,  or sale, transfer or other disposition of all or substantially all
of the Company's properties to another corporation shall be effected, then, as a
condition of such reorganization, reclassification, consolidation, merger, sale,
transfer  or other  disposition,  lawful and  adequate  provision  shall be made
whereby  each  Warrantholder  shall  thereafter  have the right to purchase  and
receive upon the basis and upon the terms and conditions herein specified and in
lieu of the Warrant Shares immediately theretofore issuable upon exercise of the
Warrant,  such shares of stock,  securities  or properties as may be issuable or
payable  with  respect to or in  exchange  for a number of  outstanding  Warrant
Shares equal to the number of Warrant Shares  immediately  theretofore  issuable


28367_1

<PAGE>


upon  exercise  of  the  Warrant,  had  such  reorganization,  reclassification,
consolidation,  merger, sale, transfer or other disposition not taken place, and
in any such case appropriate  provision shall be made with respect to the rights
and  interests  of each  Warrantholder  to the end  that the  provisions  hereof
(including, without limitations,  provision for adjustment of the Warrant Price)
shall  thereafter be applicable,  as nearly  equivalent as may be practicable in
relation to any shares of stock, securities or properties thereafter deliverable
upon the exercise thereof.  The Company shall not effect any such consolidation,
merger,  sale,  transfer or other disposition  unless prior to or simultaneously
with the  consummation  thereof  the  successor  corporation  (if other than the
Company)  resulting  from  such  consolidation  or  merger,  or the  corporation
purchasing or otherwise  acquiring such assets or other appropriate  corporation
or entity shall  assume,  by written  instrument  executed and  delivered to the
Company,  the  obligation to deliver to the holder of the Warrant such shares of
stock,  securities  or assets as, in accordance  with the foregoing  provisions,
such holder may be entitled to  purchase  and the other  obligations  under this
Warrant.

          The above  provisions of this paragraph (b) shall  similarly  apply to
successive reorganizations,  reclassifications,  consolidations, mergers, sales,
transfers or other dispositions.

          (c) In case the  Company  shall fix a record  date for the making of a
distribution  to all holders of Common Stock  (including  any such  distribution
made in connection  with a  consolidation  or merger in which the Company is the
continuing  corporation) of evidences of indebtedness or assets (other than cash
dividends or cash distributions  payable out of consolidated  earnings or earned
surplus  or  dividends  or  distributions  referred  to  in  Section  9(a)),  or
subscription  rights or warrants,  the Warrant  Price to be in effect after such
record date shall be  determined  by  multiplying  the  Warrant  Price in effect
immediately  prior to such  record date by a fraction,  the  numerator  of which
shall be the total number of shares of Common Stock  outstanding  multiplied  by
the Market  Price per share of Common Stock (as  determined  pursuant to Section
3),  less the  fair  market  value  (as  determined  by the  Company's  Board of
Directors  in good  faith)  of said  assets  or  evidences  of  indebtedness  so
distributed,  or of such subscription rights or warrants, and the denominator of
which shall be the total number of shares of Common Stock outstanding multiplied
by such current Market Price per share of Common Stock. Such adjustment shall be
made successively whenever such a record date is fixed.

          (d) An adjustment shall become effective  immediately after the record
date in the case of each  dividend or  distribution  and  immediately  after the
effective date of each other event which requires an adjustment.


          (e) In the event that, as a result of an  adjustment  made pursuant to
Section  9(a),  the holder of the Warrant  shall become  entitled to receive any
shares of capital stock of the Company  other than shares of Common  Stock,  the
number of such other shares so receivable  upon exercise of the Warrant shall be


28367_1

<PAGE>


subject  thereafter to adjustment  from time to time in a manner and on terms as
nearly  equivalent as practicable to the provisions  with respect to the Warrant
Shares contained in this Warrant.

          (f)  Shares of Common  Stock  owned by or held for the  account of the
Company or any majority-owned subsidiary shall not be deemed outstanding for the
purpose of any computation under this Agreement.

     Section 10. Fractional Interest. The Company shall not be required to issue
fractions of Warrant Shares upon the exercise of the Warrant. If any fraction of
a Warrant Share would,  except for the  provisions of this Section,  be issuable
upon the exercise of the Warrant (or specified  portions  thereof),  the Company
shall  purchase such fraction for an amount in cash equal to the current  market
value of such fraction based upon the current Market Price (determined  pursuant
to Section 3) of a Warrant Share. All  calculations  under this Section 10 shall
be made to the nearest cent or to the nearest  one-hundredth  of a share, as the
case may be.

     Section 11.  Benefits.  Nothing in this Warrant  shall be construed to give
any person,  firm or corporation  (other than the Company and the Warrantholder)
any legal or equitable right, remedy or claim, it being agreed that this Warrant
shall  be  for  the  sole  and   exclusive   benefit  of  the  Company  and  the
Warrantholder.

     Section  12.  Notices to  Warrantholder.  Upon the  happening  of any event
requiring an adjustment of the Warrant Price,  the Company shall  forthwith give
written  notice  thereof to the  Warrantholder  at the address  appearing in the
records of the  Company,  stating the  adjusted  Warrant  Price and the adjusted
number of  Warrant  Shares  resulting  from  such  event  and  setting  forth in
reasonable  detail  the  method of  calculation  and the facts  upon  which such
calculation is based.  The  certificate of the Company's  independent  certified
public  accountants  shall be  conclusive  evidence  of the  correctness  of any
computation  made,  absent  manifest  error.  Failure to give such notice to the
Warrantholder or any defect therein shall not affect the legality or validity of
the subject adjustment.

     Section 13. Identity of Transfer  Agent.  The Transfer Agent for the Common
Stock is Continental Stock Transfer & Trust Company,  2 Broadway,  New York, New
York 10004.  Forthwith upon the appointment of any subsequent transfer agent for
the Common Stock or other shares of the Company's  capital  stock  issuable upon
the exercise of the rights of purchase  represented by the Warrant,  the Company
will mail to the Warrantholder a statement setting forth the name and address of
such transfer agent.

     Section 14. Notices.  Any notice pursuant hereto to be given or made by the
Warrantholder  to or on the Company shall be sufficiently  given or made if sent
by certified  mail,  return receipt  requested,  postage  prepaid,  addressed as
follows:


28367_1

<PAGE>



                  Medical Dynamics, Inc.
                  99 Inverness Drive East
                  Englewood, CO  80112
                  Attn:  Van A. Horsley
                  Telephone:  303/790-2990
                  Facsimile:   303/799-1378

or such other  address as the  Company  may  specify in writing by notice to the
Warrantholder complying as to delivery with the terms of this Section 14.

     Any notice  pursuant hereto to be given or made by the Company to or on the
Warrantholder  shall be  sufficiently  given or made if sent by certified  mail,
return receipt requested, postage prepaid, to the address set forth on the books
of the  Company or, as to each of the  Company  and the  Warrantholder,  at such
other  address as shall be  designated  by such  party by written  notice to the
other party complying as to delivery with the terms of this Section 14. All such
notices,  requests,  demands,  directions and other  communications  shall, when
mailed be effective when deposited in the mails addressed as aforesaid.

     Section 15.  Registration  Rights.  The initial  holder of this  Warrant is
entitled to the benefit of certain registration rights in respect of the Warrant
Shares as provided in the Registration  Rights Agreement dated effective October
31, 1997.

     Section 16.  Successors.  All the covenants and provisions hereof by or for
the  benefit  of the  Investor  shall  bind  and  inure  to the  benefit  of its
respective successors and assigns hereunder.

     Section 17.  Governing  Law.  This Warrant shall be deemed to be a contract
made  under  the laws of the State of  Colorado  and for all  purposes  shall be
construed in accordance with the laws of said State.



28367_1

<PAGE>



     IN WITNESS WHEREOF,  the parties hereto have caused this Warrant to be duly
executed, as of the day and year first above written.

                                          MEDICAL DYNAMICS, INC.



                                          By:
                                             -----------------------------------
                                                   Name:
                                                   Title:



Attest:


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





<PAGE>




                             MEDICAL DYNAMICS, INC.
                              WARRANT EXERCISE FORM



MEDICAL DYNAMICS, INC.
99 Iverness Drive East
Englewood, CO  80112

     This  undersigned  hereby  irrevocably  elects  to  exercise  the  right of
purchase  represented  by the within  Warrant  ("Warrant")  for, and to purchase
thereunder by (CHECK AS  APPLICABLE) [] payment by cash or certified  check;  []
conversion  of the within  Warrant by surrender of the Warrant,  _______________
shares of Common Stock* ("Warrant  Shares")  provided for therein,  and requests
that certificates for the Warrant Shares be issued as follows:

                           -------------------------------
                           Name

                           --------------------------------
                           Address
                           --------------------------------

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

                           --------------------------------
                           Federal Tax Identification No.
                           or Social Security No.

and,  if the  number  of  Warrant  Shares  shall not be all the  Warrant  Shares
purchasable upon exercise of the Warrant,  that a new Warrant for the balance of
the Warrant Shares




         *NOTE:     If  conversion  of the Warrant is made by  surrender  of the
                    Warrant  and the  number of  shares  indicated  exceeds  the
                    maximum number of shares to which a holder is entitled,  the
                    Company will issue such maximum number of shares.




<PAGE>



purchasable  upon  exercise  of the  Warrant  be  registered  in the name of the
undersigned  Warrantholder or the undersigned's  Assignee as below indicated and
delivered to the address stated below.

Dated:
      ---------------------------

                                  Signature:
                                            ------------------------------

                                            ------------------------------
                                            Name (please print)
                                            ------------------------------
                                            Address

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


                                            ------------------------------
                                            Federal Identification or
                                            Social Security No.


                                  Note:     The above signature must
                                            correspond with the name of the
                                            registered holder as written on the
                                            first page of the Warrant in every
                                            particular, without alteration or
                                            enlargement or any change
                                            whatever, unless the Warrant has
                                            been assigned.






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