<PAGE>
                                                                   Exhibit 10(j)

                               FOURTH AMENDMENT TO
                           LOAN AND SECURITY AGREEMENT

         This Fourth Amendment to Loan and Security Agreement (this
"Amendment"), dated as of August 10, 1999, is entered into by and among AFP
IMAGING CORPORATION, a New York corporation, successor by merger to AFP
Technologies Corporation, formerly known as Kenro Corporation, a New Jersey
corporation ("AFP"), LOGETRONICS CORPORATION. a New York corporation "LogE"),
VISIPLEX INSTRUMENTS CORPORATION, a New York corporation formerly known as Xenon
Industries, Inc. ("Visiplex") and REGAM MEDICAL SYSTEMS INTERNATIONAL AB, a
Swedish corporation ("Regam") (AFP, LogE, Visiplex and Regam are thereinafter
jointly and severally, referred to as "Original Borrowers"), DENT-X
INTERNATIONAL, INC., a New York corporation ("DXI") and FINOVA CAPITAL
CORPORATION, a Delaware corporation ("Lender") formerly known as Greyhound
Financial Corporation, successor-by-merger to Greyhound Financial Capital
Corporation, an Oregon corporation.

                              W I T N E S S E T H:

         WHEREAS, Original Borrowers, and Lender are parties to that certain
Loan and Security Agreement dated as of November 22, 1993, as the same was
amended by (i) that certain First Amendment to Loan and Security Agreement dated
as of December 7, 1993 (ii) that certain Second Amendment to Loan and Security
Agreement dated as of July 14, 1995 and (iii) that certain Third Amendment to
Loan and Security Agreement dated as of July 14, 1997 (as so amended, the
"Original Loan Agreement") setting forth the terms and conditions under which
Lender would make loans and other advances to Borrower; and

         WHEREAS, DXl is a wholly owned subsidiary of AFP;

         WHEREAS, on December 23, 1997 DXI acquired certain specified assets of
ProDen SYSTEMS, INC., a Washington corporation ("ProDen"), pursuant to the terms
of a certain Asset Purchase Agreement, dated as of December 23, 1997, by and
among AFP, DXI, ProDen and Cade Adams (the "ProDen Purchase Agreement"); and

         WHEREAS, Original Borrowers have requested that Lender make certain
amendments to the Loan Agreement, which Lender is willing to do but only upon
the terms and subject to the conditions therein set forth:

         NOW, THEREFORE, for good and valuable consideration, the receipt and
sufficiency of which are thereby acknowledged, the parties agree as follows:

         1. Definitions. Unless otherwise defined in this Amendment, all
capitalized terms used therein shall have the same meaning as set forth in the
Loan Agreement.

         2. Amendments. On the Effective Date of this Amendment the Original
Loan Agreement is thereby amended as follows:

            (a) Paragraph 1(A) is thereby amended by adding or substituting, as
         the case may be, the following definitions:

                "'ACG' shall refer to ACG Nystromgruppen AB, a Swedish
            corporation

                "'this Agreement' shall mean and collectively refer to the Loan
            and Security Agreement dated as of November 22, 1993, as amended by
            the First Amendment, the Second Amendment, the Third Amendment, and
            this Amendment, and as the same may thereafter be amended, restated,
            renewed, extended or modified from time to time."

                "'Borrower' means, individually and collectively, jointly and
            severally, each of AFP, LogE, Visiplex Regam and DXI."

                "'Collateral' shall have the meaning given to it in Section 7 of
            the Fourth Amendment."

                "'DXI Note' refers to those certain subordinated promissory
            notes dated December 23, 1997 in the aggregate face amount of
            $3,000,000 made by DXI, pursuant to the ProDen Purchase Agreement,
            and delivered to ProDen and Cade Adams, as amended by that certain
            mediation settlement evidenced by a

<PAGE>

            new Promissory Note dated August 10, 1999, which results in the
            aggregate face amount of the DXI Note being $850,000, with interest
            at 7.75% per annum, and provides for interest only payments
            beginning January l, 2000 through December 31, 2001 and principal
            payments beginning January 1, 2002 based on a 36-month
            amortization."

                "'Excess Cash Flow' means Operating Cash Flow/Permitted less
            Total Contractual Debt Service."

                "'Operating Cash Flow/Permitted' means, for any period,
            Borrower's net income or loss (excluding the effect of any
            extraordinary gains or losses), determined in accordance with GAAP,
            ~ each of the following items, to the extent deducted from the
            revenue of Borrower in the calculation of net income or loss: (i)
            depreciation; (ii) amortization and other non-cash charges; (iii)
            interest expense paid or accrued; (iv)total federal and state income
            tax expense determined as the accrued liability of Borrower in
            respect of such period, regardless of what portion of such expense
            has actually been paid by Borrower during such period; and (v)
            management fees and other fees paid to Subordinating Creditors, to
            the extent permitted thereunder, and after deduction for each of (a)
            federal and state income taxes, to the extent actually paid during
            such period; (b) any non-cash income (but only to the extent such
            non-cash income was included in the revenues of Borrower in the
            calculation of net income or loss); and (c) all permitted Capital
            Expenditures (without regard to any waiver given by Lender with
            respect to any limitation on such Capital Expenditures) actually
            made during such period and not financed."

                "'Subordinating Creditor' shall mean and collectively refer to
            ProDen, ACG and the holder of the DXI Note."

            "'Subsidiary' means any of LogE, Visiplex, Regam or DXI."

                (b) Notwithstanding anything to the contrary contained in the
         Loan Agreement, "Eligible Receivables" shall exclude Receivables of DXI
         unless and until Lender shall have satisfied itself in its sole
         determination that Lender has a first priority perfected security
         interest in such Receivables of DXI

                (c) Notwithstanding anything to the contrary contained in the
         Loan Agreement, "Eligible Inventory" shall exclude Inventory of DXI
         unless and until Lender shall have satisfied itself in its sole
         determination that Lender has a first priority perfected security
         interest in such Inventory.

                (d) Paragraph 3(G) is thereby amended in its entirety to read as
         follows:

                    "(G) Examination Fees. Borrower agrees to pay to Lender an
                examination fee in the amount of Five Hundred and No/100 Dollars
                ($500.00) per day per auditor in connection with each audit or
                examination of Borrower performed by Lender and, from and after
                the Effective Date of the Fourth Amendment, all costs and
                expenses incurred by Lender in connection therewith (the
                "Examination Fee").

                (e) Paragraph 9 is thereby amended by adding the following:

                    "(g) Excess Cash Flow Prepayments. Within sixty (60) days
                following receipt by Lender of Borrower's annual audited
                financial statements, commencing with such financial statements
                for Borrower's fiscal year ending June 30, 1999, Lender may
                deliver a notice to Borrower requiring Borrower to prepay the
                Term Loans in an amount up to Fifty Percent (50%) of Borrower's
                Excess Cash Flow for such year. Any prepayments required under
                this section are strictly at the sole option of Lender, and are
                payable within thirty (30) days following the date of demand by
                Lender. All amounts paid pursuant to this section shall be
                applied to the Obligations in such order as Lender may elect. No
                Termination Fee or other form of prepayment premium shall be
                applied to any payment made under this Paragraph."

                (f) The following new Section 13(A)(vi) is thereby added to read
         as follows:

                    "(vi) DXI is a corporation duly organized, validly existing
                and in good standing under the laws of the State of New York, is
                qualified and authorized to do business and is in good standing
                in all jurisdictions in which such qualification and good
                standing are necessary in order for it to conduct its business
                and own its property (other than to the extent that such failure
                to qualify would not have a material adverse effect on the
                business or financial condition of DXI), and has all requisite
                power and

<PAGE>

                authority to conduct its business as presently conducted, to own
                its property and to execute and deliver each of the Loan
                Documents to which it is a party and perform all of its
                Obligations thereunder;"

                (g) The following is added as a new Section 13(B)(v):

                    "(v) DXI has not, since its formation, been known by or used
                any other corporate or fictitious name, including, but not
                limited to names which were used by ProDen;"

                (h) The following is added at the end of Section 13(P):

                    "In addition to the locations specified on Exhibit A, it is
                acknowledged that DXI, until July 30, 1999, will have offices at
                13915 NW Third Court, Vancouver, Washington (the "Vancouver
                Location"). The Borrower represents and warrants that the
                Vancouver Location is used only until June 30, 1999 for office
                purposes and no Inventory is (or shall be) stored or located at
                the Vancouver Location."

                (i) Section l5(K) is deleted is in its entirety and replaced
         with the

                    "(K) Indebtedness. Create, incur, assume or permit to exist
               any Indebtedness (including Indebtedness in connection with
               Capital Leases) in excess of $450,000 during any fiscal year,
               determined on a consolidated basis, other than (i) the
               Obligations, (ii) trade payables and other contractual
               obligations to suppliers and customers incurred in the ordinary
               course of business, (iii) other Indebtedness existing on the date
               of this Agreement and reflected in the Prepared Financials (other
               than Indebtedness paid on the date of this Agreement from
               proceeds of the initial advances thereunder), (iv) the
               Indebtedness owed to ACG evidenced by that certain US $1,000,000
               promissory note of AFP dated April 17, 1997 (the "ACG Note"), and
               (v) the Indebtedness evidenced by the DXI Note."

                (j) Section l5(L) is deleted in its entirety and replaced with
         the following

                    "(L) Affiliate Transactions.

                    (i) sell, transfer, distribute or pay any money or property
                to any Affiliate other than Regam, or invest in (by capital
                contribution or otherwise) or purchase or repurchase any stock
                or Indebtedness, or any property, of any Affiliate other than
                Regam, or become liable on any guaranty of the indebtedness,
                dividends or other obligations of any Affiliate; provided,
                however, that if (A) no Event of Default exists and (B) no act
                or e\vent has occurred which, with the passing of time or the
                giving of notice, or both, would constitute an Event of Default,
                then Borrower may engage in transactions with any Affiliate
                other than Regam in the normal course of business, in amounts
                and upon terms which are fully disclosed to Lender and which are
                no less favorable to Borrower than would be obtainable in a
                comparable arm's length transaction with a Person who is not an
                Affiliate:

                    (ii) sell, transfer, distribute or pay any money or property
                to Regam, or invest in (by capital contribution- or otherwise)
                or purchase or repurchase any stock or Indebtedness or property
                of Regam, in excess of $50,000 each Fiscal Year, except on the
                following terms and subject to the following conditions: (A)
                both before and after having given effect to such sale,
                transfer, distribution, payment or purchase, no Event of Default
                exists and no act or event has occurred which, with the passing
                of time or the giving of notice, or both, would constitute an
                Event of Default and (B) Lender shall have given its prior
                written approval for such sale, transfer, distribution of
                payment or purchase;

                    (iii) notwithstanding the provisions of Section l5(L)(i) or
                Section 1 5(L)(ii), Borrower may pay compensation permitted by
                Paragraph l5(J) to employees who are Affiliates, and may make
                loans or other advances permitted by Paragraph l5(B) to
                executives who are Affiliates. The Borrower may not make any
                payment to any Subordinated Creditor (including, but not
                limiting the generality of the foregoing, any payments on either
                the DXI Note, or any indebtedness of Regam) except as permitted
                by Section l5(N)."

                (k) Paragraph 15 of the Original Loan Agreement is amended by
            adding the following as subparagraph (N):



<PAGE>

                    Notwithstanding anything to the contrary contained in the
                Loan Agreement, until all of the Obligations have been fully
                repaid to Lender, Borrower shall not make any direct or indirect
                payment or prepayment in cash, property or securities, by
                set-off or otherwise, with respect to the DXI Note or any
                indebtedness of Regam without the prior consent of Lender which
                consent shall not be withheld provided (a) that the Borrower, at
                least fifteen (15) days prior to the proposed payment, delivers
                to Lender a signed certification (which will be relied upon by
                Lender) in a form acceptable to Lender, certifying to the
                benefit of Lender that (i) no Event of Default has occurred or
                is continuing under the Loan Agreement, and no Event of Default
                would result from the making of such payment, and (ii) according
                to the monthly financial statements submitted to Lender by
                Borrower, Borrower will have a Total Debt Service Coverage Ratio
                of no less than 1.1 to 1.0 and will be in compliance after
                giving effect to the payment with all other financial covenants
                set forth in the Loan Agreement, (b) the Lender verifying the
                accuracy of the foregoing certification of Borrower, and (c)
                Borrower shall have at least $500,000 in excess borrowing
                availability under the Total Facility after giving effect to any
                reserves required by Lender."

                (l) The provisions of Section 2(k) of the Third Amendment are
            amended and restated in their entirety as follows:

                    Notwithstanding anything to the contrary contained in the
                Loan Agreement, as long as (i) Borrower shall maintain excess
                borrowing availability of at least Five Hundred Thousand Dollars
                ($500,000), after giving effect to any requested but unfunded
                advance and payment in full of Borrower's suppliers to within
                sixty (60) days of such suppliers' respective written or
                agreed-upon terms, and (ii) there shall not then exist an Event
                of Default or any act or event which with notice, passage of
                time, or both would constitute an Event of Default, Borrower
                shall report to Lender Collateral information on a monthly basis
                (in the form of a Borrowing Base Certificate to be prescribed by
                Lender).

                (m) The provisions of Section 2(N) of the Third Amendment
            provided within sixty (60) days after the Third Amendment Effective
            Date, Borrower shall cause to be delivered to Lender a Subordination
            Agreement from ACG with respect to the ACG Note (the "ACG
            Agreement"). The Borrower represents to the Lender that it has used
            good faith and diligent efforts to obtain the ACG Agreement but has
            not been able to obtain the same. Relying on the foregoing
            representation, the Lender waives the requirement that the Borrower
            obtain the ACG Agreement. The foregoing waiver shall not be
            constituted as a subordination by the Lender of all or any part of
            the Loan to the debt owed to ACG.

         4. Waiver.

            (a) Based on the financial statements the Borrower has supplied for
         the calendar quarter ending March 31, 1999, the Borrower is in default
         of the covenants of Borrower contained in Section 14(Q) of the Original
         Loan Agreement. For so long as there is no other Event of Default by
         Borrower, the Lender agrees that the failure of the Borrower to
         conform, for the calendar quarter ending March 31, 1999, with the
         covenants contained in Section 14(Q) of the Loan Agreement shall not
         constitute an Event of Default.

            (b) The Lender acknowledges that the Borrower's execution of the ACG
         Note and DXI Note constitutes an Event of Default by Borrower of its
         covenants contained in Section 15(K) of the Loan Agreement. The default
         has been corrected, as of the Effective Date, by this Amendment. The
         Lender waives such default solely as it pertains to the ACG Note and
         DXI Note and solely for the periods prior to the Effective Date.

            (c) The Lender acknowledges that the Borrower has been in dispute
         with ProDen and Cade Adams regarding issues associated with the ProDen
         Purchase Agreement and that during the pendency of the dispute, the
         Borrower has not made payments under the DXI Note. The Lender waives
         any basis to claim that the failure of the Borrower, prior to the
         Effective Date, to make payments required under the DXI Note is an
         Event of Default or an Incipient Default.

            (d) The Borrower acknowledges that the foregoing waivers by Lender
         are limited to the specific periods, matters, and circumstances set
         forth in this Section. Nothing in this Section should be construed as a
         waiver by Lender of the Borrower's compliance with all other provisions
         of the Original

<PAGE>

         Loan Agreement (as amended thereby in or as a waiver of the requirement
         that the Borrower observe all other financial covenants contained in
         the Original Loan Agreement and to conform with Sections 14(Q) and
         l5(K) of the Original Loan Agreement for all other periods other than
         those specifically set forth in this Section.

         5. Reserve. From and after the date of this Amendment, in addition to
any other rights under the Original Loan Agreement, the Lender will thereinafter
reserve $600,000 from the borrowing availability under the Total Facility.

         6. DXI Note. The Lender thereby consents to the Borrower (i) prior to
the Effective Date, making a lump sum payment to ProDen of $150,000 in
connection with the DXI Note and the settlement of the dispute amongst the
parties; and (ii) after the Effective Date, making the payments contemplated by
the DXI Note.

The Borrower agrees to use good faith efforts, after the Effective Date, to
deliver to Lender a Subordination and Standstill Agreement by ProDen and Cade
Adams in a form and content acceptable to Lender.

         7. Amendment Fee. In consideration of, among other things, Lender's
consent to this Amendment, Borrower agrees to pay to Lender, upon Borrower's
execution of this Amendment, the amount of Twenty-Five Thousand Dollars
($25,000) (the "Amendment Fee"). The Amendment Fee has been fully earned by
Lender and is nonrefundable and may be disbursed by Lender from the Total
Facility.

         8. Reaffirmation and Grant of Security Interest. Without in any way
limiting the provisions of Section 4(A) of the Loan Agreement, and to secure the
prompt payment and performance of the Obligations (other than those Obligations
arising out of the Environmental Certificate), and notwithstanding which entity
constituting Borrower receives a particular advance of the Total Facility, each
entity constituting Borrower thereby reaffirms the grant to Lender of or grants
to Lender, as the case may be, a security interest in all of such Borrower's now
owned or thereafter acquired or arising Inventory, Equipment, Receivables, the
Life Insurance Policies and the proceeds thereof, Trademarks, Licenses and
Patents, and General Intangibles, including, without limitation, all of such
Borrower's Deposit Accounts, money, any and all property now or at any time
thereafter in Lender's possession (including claims and credit balances), and
all proceeds (including proceeds of any insurance policies, proceeds of proceeds
and claims against third parties), all products and all books and records
related to any of the foregoing (all of the foregoing, together with all other
property in which Lender may be granted a lien or security interest, is referred
to therein, collectively, as the "Collateral"; provided, however, that, with
respect solely to Collateral of Regam, such Collateral of Regam shall in all
events include only property of Regain located in the United States of America
as of the Third Amendment Effective Date together with such Collateral of Regam
as thereafter may be located therein from time to time.

         9. Conditions Precedent. The amendments described in this Amendment and
the obligations of Lender set forth in this Amendment will not be effective
unless and until each of the following conditions precedent have been satisfied,
in form, manner and substance satisfactory to Lender:

            (a) Borrower shall have delivered or caused to be delivered to
         Lender the following documents, all of which shall be properly
         completed, executed and otherwise satisfactory to Lender:

                (i) this Amendment;

                (ii) A corporate resolution from the Board of Directors of each
            entity constituting Borrower (and from the Shareholders, if
            necessary) approving the transactions contemplated thereby and the
            execution and delivery of this Amendment;

                (iii) A certificate of Borrower's president and corporate
            assistant secretary attesting to the facts that (A) the corporate
            resolutions set forth in Section 9(a)(ii) above have not been
            modified or revoked and remain in full force and effect; and (B) the
            by-laws of such Borrower have not changed from the date of the last
            such certification, or attaching any amendments thereto.

                (iv) Such amendments to Lender's existing financing statements
            and such new financing statements in Lender's favor as Lender deems
            necessary; and

                (v) Such other items as Lender may require;

<PAGE>

            (b) Lender shall have received a certificate of corporate status
         with respect to each Borrower, dated within ten (10) days of the date
         thereof, from the Secretary of State or other appropriate governmental
         authority of the state or country of incorporation of each Borrower,
         which certificate shall indicate that each Borrower is in good standing
         in such jurisdiction, together in each case with a certified copy of
         the articles of incorporation of each Borrower from such governmental
         authority;

            (c) After giving effect to this Amendment, there shall not then
         exist an Event of Default;

            (d) All the representations and warranties of the Loan Parties in
         the Loan Documents as amended thereby shall be true and correct, in all
         material respects, before and after giving effect to the making of this
         Amendment;

            (e) Lender shall have reviewed and approved a current UCC and
         judgment search on each Borrower;

            (f) Borrower has paid to Lender the Amendment Fee or in lieu thereof
         the fee has been paid to Lender by an advance by Lender against the
         Total Facility;

            (g) Lender shall have received a recent orderly liquidation value
         appraisal of Borrower's Equipment calculated at the lower of cost or
         market value, on a first-in, first-out basis, performed by one or more
         appraisers acceptable to Lender; and

            (h) Borrower shall have paid all reasonable closing costs, recording
         fees and taxes, appraisal fees and expenses, travel expenses, fees and
         expenses of Lender's counsel, and all other costs and expenses incurred
         by Lender in connection with the preparation of this Amendment, which
         costs, fees and expenses may be paid to Lender by an advance by Lender
         against the Total Facility.

         10. Indebtedness Acknowledged. Borrower acknowledges that the
indebtedness evidenced by the Loan Documents is just and owing and agrees to pay
the indebtedness in accordance with the terms of the Loan Documents. Borrower
further acknowledges and represents that no event has occurred and no condition
presently exists that would constitute a default or event of default by Lender
under the Loan Agreement as amended thereby or any of the other Loan Documents,
with or without notice or lapse of time.

         11. Validity of Documents. Borrower thereby ratifies, reaffirms,
acknowledges and agrees that the Loan Agreement as amended thereby and the other
Loan Documents represent valid, enforceable and collectable obligations of
Borrower, and that Borrower presently has no existing claims, defenses (personal
or otherwise) or rights of setoff whatsoever with respect to the Obligations of
Borrower under the Loan Agreement as amended thereby or any of the other Loan
Documents. Borrower furthermore agrees that it has no defense, counterclaim,
offset, cross-complaint, claim or demand of any nature whatsoever which can be
asserted as a basis to seek affirmative relief or damages from Lender.

         12. Reaffirmation of Warranties. Borrower thereby reaffirms to Lender
each of the representations, warranties, covenants and agreements of Borrower as
set forth in each of the Loan Documents as amended thereby with the same force
and effect as if each were separately stated therein and made as of the date
thereof. Borrower represents and warrants to Lender that with respect to the
financing transaction therein contemplated, no Person is entitled to any
brokerage fee or other commission and Borrower agrees to indemnify and hold
Lender harmless against any and all such claims.

         13. Ratification of Terms and Conditions. All terms, conditions and
provisions of the Loan Agreement as amended thereby, and of each of the other
Loan Documents shall continue in full force and effect and shall remain
unaffected and unchanged except as specifically amended thereby. In the event of
any conflict between the terms and conditions of this Amendment and any of the
other Loan Documents, the provisions of this Amendment shall control.

         14. Other Writings. Lender and Borrower will execute such other
writings as may be necessary to confirm or carry out the intentions of Lender
and Borrower evidenced by this Amendment.

<PAGE>

         15. Benefit of this Amendment. The terms and provisions of this
Amendment and the other Loan Documents shall be binding upon and inure to the
benefit of Lender and Borrower and their respective successors and assigns,
except that Borrower shall not have any right to assign its rights under this
Amendment or any of the Loan Documents or any interest therein without the prior
written consent of Lender.

         16. Choice of Law. The Loan Documents and this Amendment shall be
performed and construed in accordance with the laws of the State of Arizona.

         17. Entire Agreement. Except as modified by this Amendment, the Loan
Documents remain in full force and effect. The Loan Documents as modified by
this Amendment embody the entire agreement and understanding between Borrower
and Lender, and supersede all prior agreements and understandings between said
parties relating to the subject matter thereof.

         18. Counterparts; Telecopy Execution. This Amendment may be executed in
any number of separate counterparts, all of which when taken together shall
constitute one and the same instrument, admissible into evidence,
notwithstanding the fact that all parties have not signed the same counterpart.
Delivery of an executed counterpart of this Amendment by telefacsimile shall be
equally as effective as delivery of a manually executed counterpart of this
Amendment. Any party delivering an executed counterpart of this Amendment by
telefacsimile shall also deliver a manually executed counterpart of this
Amendment, but the failure to deliver a manually executed counterpart shall not
affect the validity, enforceability, and binding affect of this Amendment.

         19. Effectiveness of Amendment. This Amendment shall not be effective
until the same is executed and delivered by the parties thereto and all
conditions set forth in Section 9 thereof have been satisfied. The date that all
of the conditions set forth in Section 9 thereof have been satisfied is called
the "Effective Date."

         20. No Waiver. Except as specifically set forth therein, this Amendment
in no way acts as a waiver by Lender of any breach, default, Event of Default or
condition which, with the giving of notice or passing of time or both, would
constitute an Event of Default, of Borrower (whether known or unknown to Lender)
or as a release or relinquishment of any of the liens, security interests,
rights or remedies securing payment and performance of the Obligations or the
enforcement thereof. Nothing contained in this Amendment is intended to or shall
be construed as relieving any person or entity, whether a party to this
Amendment or not, of any of such person's or entity's obligations to Lender.


                            [SIGNATURE PAGE FOLLOWS]



<PAGE>



IN WITNESS WHEREOF, the parties have executed this Amendment on the date and
year first written above.
<TABLE>
<S>                                           <C>
AFP IMAGING CORPORATION, a New York           LOGETRONICS CORPORATION, a New York
corporation, successor by merger to AFP       corporation
Technologies Corporation, formerly known
as Kenro Corporation, a New Jersey
corporation                                   By:
                                                       -----------------------------------
                                                 Name:
By:                                                    -----------------------------------
         -----------------------------------     Title:
   Name:                                               -----------------------------------
         -----------------------------------
   Title:
         -----------------------------------  REGAM MEDICAL SYSTEMS INTERNATIONAL
                                              AB, a Swedish corporation

VISIPLEX INSTRUMENTS CORPORATION, a New
York corporation formerly known as Xenon      By:
Industries, Inc.                                       -----------------------------------
                                                 Name:
By:                                                    -----------------------------------
         -----------------------------------     Title:
   Name:                                               -----------------------------------
         -----------------------------------
   Title:
         -----------------------------------  FINOVA CAPITAL CORPORATION, a
                                              Delaware corporation formerly known
                                              as Greyhound Financial Corporation,
DENT-X INTERNATIONAL, INC., a New York        successor-by-merger to Greyhound
corporation                                   Financial Capital Corporation, an
                                              Oregon corporation

By:
         -----------------------------------  By:
   Name:                                               -----------------------------------
         -----------------------------------     Name:
   Title:                                              -----------------------------------
         -----------------------------------     Title:
                                                       -----------------------------------
</TABLE>