EXHIBIT (d)(7)

                            U.S. Service Agreement

This Agreement is made by Tutogen Medical, Inc., a Florida corporation with
offices at 925 Allwood Road, Clifton, NJ 07012, U.S.A. ("Tutogen") and Sulzer
Calcitek Inc., a Delaware corporation with offices at 1900 Aston Avenue,
Carlsbad, California, U.S.A. ("Sulzer").

                              W I T N E S S E T H:

WHEREAS, Tutogen collects donated allograft tissue from sources throughout
Europe and within the United States, processes such tissue itself or provides
such tissue for processing by others, and makes processed tissue available to
users through various distributors throughout the world, including the United
States;

WHEREAS, Tutogen's distribution of processed bone tissue for dental applications
in the United States is not extensive at the present time;

WHEREAS, Tutogen desires to process and distribute for itself allograft bone
tissue products for dental applications in the United States;

WHEREAS, Sulzer manufactures and sells worldwide a line of products used in
dental applications and maintains an understanding of the market for products
used in dental applications, including products manufactured from processed
allograft bone tissue; and

WHEREAS, Sulzer is willing to provide its expertise and support services to
Tutogen in consideration of Tutogen's agreement to process for itself donated
allograft bone tissue and to make the processed tissue available to users in the
US, using exclusively Sulzer's expertise and support services;

NOW, THEREFORE, in consideration of the foregoing premises and the terms and
conditions set forth below, the parties hereby agree as follows:

1.  Definitions

1.1  "Affiliate" shall mean an entity that controls, is controlled by, or is
      ---------
     under common control with a party.  For purposes of this definition,
     "control" shall mean the possession, directly or indirectly, of a majority
     of the voting power of such entity (whether through ownership of securities
     or partnership or other ownership interests, by contract or otherwise);
     provided that, such entity shall be deemed an Affiliate only so long as
     such control continues.

1.2  "Average Aging Date" shall have the meaning set forth in Section 4.2.
      ------------------

1.3  "Clinical Expenses" shall have the meaning set forth in Section 5.3.
      -----------------

1.4  "Contract Year" shall mean the one-year period following the Effective Date
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     of this Agreement and each one-year period following each anniversary of
     the Effective Date of this Agreement.

1.5  "Effective Date" shall mean the date on which this Agreement has been
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     executed by an authorized officer of each party, as witnessed on the
     signature page of this Agreement.


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1.6  "FDA" shall mean the United States Food and Drug Administration.
      ---

1.7  "Field of Use" shall mean all uses of processed allograft bone tissue in or
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     adjoining the human maxilla or the human mandible.

1.8  "Permitted Successor" shall mean any individual, corporation, partnership,
      -------------------
     joint venture, association, trust, or any other entity or organization of
     any kind or character that assumes the obligations of a party under this
     Agreement as permitted according to the terms of this Agreement.

1.9  "Processed Tissues" shall mean allograft bone tissue processed by Tutogen
      -----------------
     or an Affiliate of Tutogen or a Permitted Successor of Tutogen, as listed
     in Schedule A attached hereto.  The parties shall mutually agree as to the
     addition of processed tissues to Schedule A.  To the extent that a
     Processed Tissue is not available from Tutogen at the time of its listing
     on Schedule A, the parties agree to collaborate on its final design and
     development in accordance with Section 2 of the Processed Tissue
     Development and License Agreement of even date between Sulzer and an
     Affiliate of Tutogen.

1.10 "Regulatory Plan" shall have the meaning set forth in Section 5.2.2.
      ---------------

1.11 "RTI Agreement" shall mean the Shaft Recovery and Service Reimbursement
      -------------
     Agreement between Tutogen and Regeneration Technologies Inc. ("RTI"), as
     successor to the University of Florida Tissue Bank, effective as of 29
     September 1998, as modified by Amendment thereto dated 28 June 1999,
     pursuant to which Tutogen supplies certain human donor bone tissue to RTI,
     which RTI processes for use in surgical applications.

1.12 "Services" shall have the meaning set forth in Section 2.2.
      --------

1.13 "Territory" shall mean the United States, including its territories and
      ---------
     possessions.

1.14 "Third Party" shall mean a person or entity other than Tutogen, any
      -----------
     Tutogen Affiliate, Sulzer, any Sulzer Affiliate or any officer, director,
     or employee of Tutogen, any Tutogen Affiliate, Sulzer, or any Sulzer
     Affiliate.


2.  Grant of Rights

2.1  Supply of Processed Tissue. During the term of this Agreement, to the
     --------------------------
     extent that it can do so without breaching an obligation under a pre-
     existing agreement, including the RTI Agreement, Tutogen agrees to collect
     donated allograft bone tissue, process such bone tissue itself using its
     proprietary Tutoplast process, manufacture the Processed Tissues, and make
     the Processed Tissues available in the Territory for the Field of Use using
     the Services of Sulzer.


2.2  Sulzer's Services.  Sulzer shall use reasonable efforts to provide the
     -----------------
     following services (the "Services") to Tutogen, as soon as is reasonably
     possible following the Effective Date, for the purpose of making Processed
     Tissues available to users in the Territory for the Field of Use:

       2.2.1  providing and training field support personnel necessary to meet
              and communicate with clinicians regarding the Processed Tissues
              and their use; and

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       2.2.2  preparing and distributing printed materials describing and
              promoting use of the Processed Tissues.

2.3  Exclusive Right. Tutogen hereby grants Sulzer the exclusive right during
     ---------------
     the term of this Agreement to provide the Services for the Processed
     Tissues in the Territory for the Field of Use. So long as donated allograft
     bone tissue continues to be available to Tutogen or any of its Affiliates
     or its Permitted Successors during the term of this Agreement, including
     tissues collected from sources available to Tutogen or its Affiliates as of
     the Effective Date, as well as tissues collected from sources developed by
     Tutogen or its Affiliates or its Permitted Successors during the term of
     this Agreement, Tutogen or its Permitted Successors shall make the
     Processed Tissues available to users in the Territory using exclusively the
     Services of Sulzer. During the term of this Agreement, neither Tutogen, nor
     any Affiliate of Tutogen, nor any Permitted Successor of Tutogen shall
     permit or engage an entity other than Sulzer to provide the Services in the
     Territory for the Field of Use.

2.4  Consignment Inventory.  Tutogen shall have the option to consign inventory
     ---------------------
     of the Processed Tissues to Sulzer for the benefit of Processed Tissue
     users in circumstances in which users could not timely obtain the Processed
     Tissues directly from Tutogen. In no event shall Sulzer acquire title to
     the consigned Processed Tissues. Tutogen shall mark the consigned Processed
     Tissues as the sole property of Tutogen.

2.5  Consideration.  In consideration of the rights granted by Tutogen to Sulzer
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     in this Section 2, Sulzer agrees to pay Tutogen US$200,000 by wire transfer
     pursuant to Tutogen's written instructions within five business days
     following the date on which Tutogen first delivers an order for Processed
     Tissues obtained by use of the Services.

3. Sulzer's Obligations

3.1  Service Fees for Processed Tissues.  Tutogen shall specify the appropriate
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     fee to Processed Tissue users for Tutogen's services in making each of the
     Processed Tissues available in the Territory.  Based on its knowledge and
     understanding of dental-related matters, Sulzer shall advise Tutogen on
     appropriate fees and recommend such fees for Tutogen's services for each
     Processed Tissue, including adjustments in such fees as necessary in
     Sulzer's opinion.  In no event shall any payment be made to Tutogen or
     Sulzer for any donated human tissue.

3.2  Forecasting.  Within 30 days following execution of this Agreement, Sulzer
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     shall provide Tutogen with a monthly forecast of demand for the Processed
     Tissues during the succeeding six-month period.  Commencing with the second
     calendar quarter of 2001 and continuing quarterly thereafter, Sulzer shall
     provide Tutogen, no later than 15 days prior to each calendar quarter, with
     a rolling monthly forecast of demand for the Processed Tissues for the
     succeeding 12 months.  Sulzer's forecasts shall specify the anticipated
     demand by Processed Tissue and by month.  Sulzer shall incur no liability
     to Tutogen in the event that actual demand for the Processed Tissues
     differs from Sulzer's forecasts.

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4. Tutogen's Obligations

4.1  Processed Tissue Supply.  Tutogen agrees to use reasonable efforts to
     -----------------------
     procure donor allograft bone tissue, process the tissue using the Tutoplast
     process according to Sulzer's forecasts of demand for Processed Tissues
     (Section 3.2), deliver the Processed Tissues to users in a timely manner,
     and invoice the users for Tutogen's services in a timely manner. In no
     event shall Tutogen or an Affiliate of Tutogen or a Permitted Successor of
     Tutogen during the term of this Agreement supply allograft bone tissue,
     whether processed or unprocessed, to a Third Party for further distribution
     in the Territory for the Field of Use; provided that, Tutogen shall be
     obligated, as contemplated by Section 2.1 of this Agreement, to supply
     Processed Tissues directly to users, and Tutogen shall be permitted to
     deliver unprocessed allograft bone tissue pursuant to the RTI Agreement so
     long as Tutogen's supply of allograft bone tissue exceeds the demand for
     Processed Tissues under this Agreement.

4.2  Sulzer's Service Fee.  Tutogen agrees to pay Sulzer a fee (the "Service
     --------------------
     Fee") for Sulzer's services as set forth in Schedule B. The Service Fee
     shall be paid by Tutogen monthly no later than the Average Aging Date. The
     "Average Aging Date" shall be fixed annually at the onset of each new
     Contract Year and shall be the last business day of the month during which
     Tutogen invoices the user for its services, plus the average aging period
     for Tutogen's invoices for services during the preceding Contract Year. The
     Average Aging Date shall be 90 days for the first Contract Year. The
     Service Fee shall be deemed to cover all services rendered by Sulzer under
     this Agreement, irrespective of whether such services are encompassed by
     the Services specified in Section 2.2 above, whether they are expressly
     mentioned elsewhere in this Agreement, or whether they are not mentioned.

4.3  Report.  Tutogen shall prepare and deliver to Sulzer within 15 days
     ------
     following the end of each month a report detailing for each order completed
     during the preceding month:  the user, the number of Processed Tissue units
     delivered, the fee for Tutogen's services invoiced in connection with each
     such Processed Tissue unit, and the amount of Sulzer's Service Fee for each
     Processed Tissue unit.

4.4  Audit.  Upon reasonable notice to Tutogen, Sulzer shall have the right to
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     have an independent certified public accountant, selected by Sulzer and
     reasonably acceptable to Tutogen, audit during normal business hours only
     such records of Tutogen as are necessary to verify the calculation of the
     Service Fee; provided, however, that such audit shall not take place more
     frequently than once a year and shall not cover records for more than the
     preceding four (4) years.  Any such audit shall be at the expense of Sulzer
     unless such audit concludes that Tutogen has underpaid the Service Fee by
     more than five percent, in which case such audit shall be at the expense of
     Tutogen.

4.5  Processed Tissue Samples.  Tutogen agrees to provide to Sulzer at no
     ------------------------
     expense to Sulzer such samples of the Processed Tissues as Sulzer may
     reasonably require to assist it in the performance of the Services.

4.6  Training.  Tutogen agrees to provide training services to Sulzer, as
     --------
     reasonably requested by Sulzer, regarding the Tutoplast process and the
     manufacture and use of the Processed Tissues.  Tutogen and Sulzer shall
     confer and agree upon

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     on the scope of and location for the training services to be provided by
     Tutogen and the distribution of the expenses for such training services.

5. Regulatory Matters

5.1  Import Compliance.  Tutogen agrees to comply with and maintain compliance
     -----------------
     with all governmental rules, regulations, statutes and other laws of any
     kind necessary to import into and distribute the Processed Tissues within
     the Territory.

5.2  Regulatory Responsibilities. The parties understand that as of the
     ---------------------------
     Effective Date of this Agreement, allograft processed tissues are not
     regulated by the FDA as a medical device. In the event that the FDA
     commences regulation of a Processed Tissue as a medical device or other
     matter subsequent to the Effective Date, subject to the agreement of both
     Sulzer and Tutogen within 90 days from the effective date of such FDA
     regulation, Tutogen shall be responsible for applying for regulatory
     approval from the FDA to make such regulated Processed Tissue available in
     the Territory for the Field of Use.

       5.2.1  In the event that either Sulzer or Tutogen, in its sole
              discretion, does not agree to seek regulatory approval for the
              newly regulated Processed Tissue, then such Processed Tissue shall
              be removed from Schedule A. If Tutogen desires to seek regulatory
              approval, but Sulzer does not, Tutogen shall have the right to
              seek regulatory approval for such Processed Tissue at its own
              expense and to make such processed tissue available to users
              without obligation to Sulzer under this Agreement. If Sulzer
              desires to seek regulatory approval for such Processed Tissue, but
              Tutogen does not, Sulzer, subject to Tutogen's agreement to supply
              the processed tissue, shall have the right to seek regulatory
              approval for such processed tissue at its own expense and to make
              such processed tissue available to users without obligation to
              Tutogen under this Agreement.

       5.2.2  In the event that Sulzer and Tutogen each agree to seek regulatory
              approval for the newly regulated Processed Tissue, then the
              parties shall forthwith meet and agree upon a plan pursuant to
              which Tutogen will seek regulatory approval for the Processed
              Tissue from the FDA. (the "Regulatory Plan"). The Regulatory Plan
              shall include an agreement as to the scope, timing, and
              supervisory responsibility for preclinical studies, clinical
              trials, regulatory submissions, and all other matters related to
              the FDA regulatory approval process for the Processed Tissue. The
              parties shall meet at least once annually to review and amend the
              Regulatory Plan as dictated by the current status of the clinical
              and regulatory process.

5.3  Clinical Expenses.  Sulzer and Tutogen shall each pay one-half of all out-
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     of-pocket expenses incurred in execution of a Regulatory Plan subsequent to
     the Effective Date, excluding salary, benefits, and other costs for
     employees of the parties (the "Clinical Expenses").

       5.3.1  In the absence of an agreement to the contrary, a party that
              incurs Clinical Expenses in a calendar quarter shall invoice the
              other party quarterly in arrears for one-half of such Clinical
              Expenses. The invoice shall specify for each such expense the
              vendor, the purpose, and the

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              date such expense was incurred and shall include a copy of
              supporting documentation of the expense.

       5.3.2  A party receiving an invoice for Clinical Expenses, unless the
              invoice is disputed, shall either pay the invoice or setoff the
              invoice with other Clinical Expenses within 45 days from the date
              of the invoice.

5.4  Ownership of Approvals.  Tutogen shall be the record owner of all FDA
     ----------------------
     approvals to make regulated Processed Tissues available in the Territory
     for the Field of Use.

5.5  Cooperation and Assistance.  Tutogen and Sulzer agree to cooperate and
     --------------------------
     assist one another as the other may reasonably request regarding
     registration of and regulatory matters relating to the Processed Tissues.

5.6  Processed Tissue Recalls.  Tutogen, as manufacturer of the Processed
     ------------------------
     Tissues, shall be responsible for execution of and all expenses related to
     any recall of Processed Tissues, including, but not limited to, retrieving
     recalled Processed Tissues from users, scrapping or discarding recalled
     Processed Tissues, and resupplying users with replacement Processed
     Tissues.

6. Trademarks

6.1  License Grant.  Tutogen grants Sulzer a nonexclusive license under
     -------------
     Tutogen's trademark, Tutoplast and Tutodent (the "Trademarks"), to use the
     Trademarks solely in connection with the Processed Tissues in the
     performance of Sulzer's Services within the Territory for the Field of Use.

6.2  Approval of Marketing Publications.  Sulzer shall provide Tutogen with
     ----------------------------------
     samples of all of Sulzer's printed materials utilizing a Trademark in
     advance of publication of the same. Tutogen shall be deemed to have
     approved such samples for actual use unless it objects in writing within 10
     business days following Sulzer's delivery of same.

6.3  New Trademarks.  Subject to the approval of Tutogen, which shall not be
     --------------
     withheld unreasonably, Sulzer shall have the right to adopt new trademarks
     of its choosing for use in connection with the Processed Tissues.

7. Term and Termination

7.1  Term.  This Agreement shall be effective on the Effective Date and shall
     ----
     remain in effect for an initial term of 10 Contract Years, unless sooner
     terminated according to the terms set forth in this Agreement.  At the end
     of the tenth Contract Year and each succeeding anniversary of the Effective
     Date, this Agreement shall renew automatically for a successive one-year
     term unless one party gives the other party written notice of termination
     at least 12 months in advance of the renewal date.

7.2  Material Breach.  If either party is in material breach of any obligation
     ---------------
     in this Agreement, the non-breaching party may give written notice to the
     breaching party of its intention to terminate this Agreement, and this
     Agreement will terminate 60 days after the giving of such notice unless
     during the 60-day period (i) the breach has been cured, or (ii) if a breach
     is incapable of cure within the 60-

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     day period, the breaching party has commenced action which is calculated to
     result in a cure of the breach to the reasonable satisfaction of the non-
     breaching party within 120 days after the giving of notice. If at the end
     of the 60-day or 120-day period following a notice of termination the
     parties disagree as to whether the Agreement has terminated as provided in
     this paragraph, the parties shall continue to perform under this Agreement
     until an arbitration tribunal constituted as provided in this Agreement has
     ruled on the matter.

7.3  Insolvency.  Either party may terminate this Agreement immediately on
     ----------
     delivery of written notice to the other party (i) upon the institution by
     or against such other party of insolvency, receivership, or bankruptcy
     proceedings or any other proceedings for the settlement of such party's
     debts; provided that, with respect to involuntary proceedings, such
     proceedings are not dismissed within 120 days, (ii)  upon such other
     party's making an assignment for the benefit of creditors, or (iii) upon
     such other party's dissolution or ceasing to do business.

7.4  Termination Without Cause.  Sulzer shall have the right to terminate this
     -------------------------
     Agreement with or without cause at any time on or after 1 January 2002;
     provided that, Sulzer shall have given Tutogen written notice of
     termination at least 12 months in advance of the termination date.  In the
     event that Sulzer shall terminate this Agreement without cause as provided
     in this Section 7.4, neither Sulzer nor any Affiliate of Sulzer shall for a
     period of one year following the effective date of termination enter into
     an agreement, either directly or indirectly, to own, operate, advise, or
     have any interest in any business relating to the Processed Tissues in the
     Territory for the Field of Use.

7.5  Interruption of Donor Availability.  Notwithstanding the Force Majeure
     ----------------------------------
     provision in Section 9.2, in the event that Tutogen is unable to supply
     Processed Tissues for a continuous period of six months because Tutogen,
     for whatever reason, is unable to obtain tissue donors, Sulzer shall have
     the right to terminate this Agreement.  In the event that Sulzer terminates
     this Agreement pursuant to this Section 7.5, Tutogen shall be entitled to
     retain any payments made by Sulzer.

7.6  Refund of Clinical Expenses.  In the event that the Agreement terminates
     ---------------------------
     (i) by reason of Tutogen's notice of termination under Section 7.1, or (ii)
     by reason of Tutogen's material breach under Section 7.2, then Tutogen
     shall be obligated to reimburse Sulzer's payment of Clinical Expenses, as
     determined in this Section 7.6, in obtaining or attempting to obtain
     regulatory approval for Processed Tissues under Section 5.  For each
     Processed Tissue as to which Sulzer incurred unreimbursed Clinical
     Expenses, Tutogen shall be obligated to reimburse an amount determined by
     multiplying the unreimbursed Clinical Expenses paid by Sulzer for that
     Processed Tissue by the Reimbursement Ratio.  The "Reimbursement Ratio" is

               10 yrs - (t\\exp\\ - t\\app\\) / 10 yrs,

     where t\\exp\\ is the effective date of termination of the Agreement and
     t\\app\\ is the date of regulatory approval for the Processed Tissue. For
     example, if Sulzer obtains a regulatory approval for a Processed Tissue at
     the beginning of the second Contract Year after incurring unreimbursed
     Clinical Expenses in the amount of $100,000 and the Agreement terminates at
     the beginning of the fifth Contract Year, the Reimbursement Ratio is

               10 yrs - (3 yrs) / 10 yrs  =  0.7

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     and Tutogen owes Sulzer $70,000.  The reimbursed amount shall be paid in
     three equal annual installments due within 60 days of the date of
     termination, one year after termination, and two years after termination,
     without interest.


8. Representations, Warranties, Indemnities, and Limitation of Liabilities

8.1  Tutogen.  Tutogen represents and warrants to Sulzer, as follows:
     -------

       8.1.1  Tutogen has the corporate power and authority to execute and
              deliver this Agreement and to perform its obligations hereunder,
              and the execution, delivery, and performance of this Agreement
              have been validly authorized by Tutogen.

       8.1.2  Tutogen has the right to grant to Sulzer the rights and licenses
              granted in this Agreement.

       8.1.3  As of the date of this Agreement, and to the best of its knowledge
              and belief, neither the processing of, nor the use of, nor the
              collection of fees related to the Processed Tissues in the
              Territory constitutes a misuse or misappropriation of confidential
              information or trade secrets or a breach of confidence, and does
              not infringe or violate any valid patent, trademark, or copyright
              or any other intellectual property rights of any third party.
              Tutogen has disclosed to Sulzer all patents and other intellectual
              property rights which, to Tutogen's knowledge, may have a material
              effect on Sulzer's ability to make available the Processed
              Tissues.

       8.1.4  Tutogen has not received notice that the processing of, use of, or
              collection of service fees related to the Processed Tissues
              violates any patent rights or any other intellectual property
              right or constitutes a misappropriation or misuse of trade secrets
              or proprietary information.

       8.1.5  Tutogen shall promptly notify Sulzer of any claim of infringement
              or misappropriation relating to the Processed Tissues.

       8.1.6  To the best of Tutogen's knowledge and belief, Tutogen's
              procurement of donor allograft tissue complies fully with all laws
              of the country in which the donor tissue is collected, including
              all national, regional, and local laws.

       8.1.7  To the best of Tutogen's knowledge and belief, Tutogen possesses
              all governmental and other approvals required for the collection
              and processing of donor allograft tissue, and Tutogen shall use
              reasonable efforts to maintain all such approvals throughout the
              term of this Agreement.

       8.1.8  To the best of Tutogen's knowledge and belief, Tutogen's
              distribution of the Processed Tissues as contemplated under this
              Agreement complies fully with the United States National Organ
              Transplant Act ("NOTA"), 42 U.S.C. section 274e. Tutogen shall
              give Sulzer immediate notice in the event that Tutogen becomes
              aware of an investigation or inquiry from any regulatory or
              governmental authority of a potential violation of NOTA.

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       8.1.9  For a period of 12 months from the date of Tutogen's delivery to a
              user, each Processed Tissue shall be free from defects in
              material, manufacturing, and workmanship, including, but not
              limited to, disease, excluding defects caused by the abuse,
              misuse, neglect, or by improper testing, handling, storage, or use
              by a party other than Tutogen.

       8.1.10 During the term of this Agreement, except as required by law or
              by a pre-existing contractual obligation of Tutogen, Tutogen will
              not, directly or through an Affiliate, assign, sell, transfer,
              convey, or otherwise alienate in whole or in part any right to
              receive donated allograft bone tissue without the prior written
              agreement of Sulzer.

8.2  Liability for Breach of Processed Tissue Warranty.  If any failure to
     -------------------------------------------------
     conform to the representation and warranty set forth in Section 8.1.9
     appears within the applicable warranty period, Tutogen will, at its option
     and expense, correct any such failure either by replacing the defective or
     non-conforming Processed Tissue or by repairing such Processed Tissue.  In
     no event shall the liability of Tutogen in connection with such warranty
     exceed the cost of replacing or repairing the defective Processed Tissue.
     The foregoing shall constitute the exclusive remedy of Sulzer and the sole
     liability of Tutogen whether in contract or in tort or otherwise relating
     to a defect of a Processed Tissue.

8.3  Exclusion of Other Warranties.  The representations and warranties stated
     -----------------------------
     in Section 8.1 are expressly in lieu of all other warranties, including,
     but not limited to, any implied warranty of merchantability or of fitness,
     and constitute the only warranties made with respect to any Processed
     Tissue.

8.4  Sulzer. Sulzer represents and warrants to Tutogen, as follows:
     ------

       8.4.1  Sulzer has the corporate power and authority to execute and
              deliver this Agreement and to perform its obligations hereunder,
              and the execution, delivery, and performance of this Agreement
              have been validly authorized by Sulzer.

8.5  Indemnity by Tutogen.
     --------------------

       8.5.1  Tutogen shall defend, indemnify, and hold harmless Sulzer against
              any liability or damages from any third party claims, suits,
              proceedings, demands, recoveries, or expenses ("Claims") to the
              extent that such Claims arise from or are based upon: (i) material
              breach by Tutogen of any of its representations or warranties
              contained herein; or (ii) negligence, gross negligence, or
              intentionally wrongful acts or omissions on the part of Tutogen;
              provided that Sulzer: (a) promptly notifies Tutogen in writing of
              any such Claim which comes to its attention; (b) allows Tutogen to
              control the defense or settlement of such Claim; (c) does not
              enter into any settlement or compromise of such Claim without the
              express authorization of Tutogen; and (d) reasonably cooperates
              with Tutogen in the defense of such Claim, subject to Tutogen's
              payment of all reasonable out-of-pocket expenses associated with
              such cooperation by Sulzer. Sulzer shall have the right to
              participate in a non-controlling fashion in such legal proceeding
              at its sole expense.

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       8.5.2  No undertaking of Tutogen under this section shall extend to any
              such alleged infringement or violation to the extent that it: (a)
              arises from adherence to design modifications, specifications,
              drawings, or written instructions which Tutogen is directed by
              Sulzer to follow, but only if such alleged infringement or
              violation does not reside in corresponding Processed Tissue of
              Tutogen's design or selection; or (b) arises from adherence to
              instructions to apply Sulzer's trademark, trade name, or other
              company identification; or (c) resides in a Processed Tissue which
              is not of Tutogen's origin and which is furnished by Sulzer to
              Tutogen for use under this Agreement; or (d) relates to use of
              Processed Tissues or other items provided by Tutogen in
              combination with other Processed Tissues or items furnished either
              by Tutogen or others, which combination was not installed,
              recommended, or otherwise approved by Tutogen. In the foregoing
              cases numbered (a) through (d), Sulzer will defend and hold
              Tutogen harmless, subject to the same terms and conditions and
              exceptions stated above, with respect to Tutogen's rights and
              obligations under this clause.

8.6  Indemnity by Sulzer.
     -------------------

       8.6.1  Sulzer shall defend, indemnify, and hold harmless Tutogen against
              any liability or damages from any third party claims, suits,
              proceedings, demands, recoveries, or expenses ("Claims") to the
              extent that such Claims arise from or are based upon: (i) material
              breach by Sulzer of any of its representations or warranties
              contained herein; or (ii) negligence, gross negligence, or
              intentionally wrongful acts or omissions on the part of Sulzer;
              provided that Tutogen: (a) promptly notifies Sulzer in writing of
              any such Claim which comes to its attention; (b) allows Sulzer to
              control the defense or settlement of such Claim; (c) does not
              enter into any settlement or compromise of such Claim without the
              express authorization of Sulzer; and (d) reasonably cooperates
              with Sulzer in the defense of such Claim, subject to Sulzer's
              payment of all reasonable out-of-pocket expenses associated with
              such cooperation by Tutogen. Tutogen shall have the right to
              participate in a non-controlling fashion in such legal proceeding
              at its sole expense.

       8.6.2  No undertaking of Sulzer under this section shall extend to any
              such alleged infringement or violation to the extent that it: (a)
              arises from adherence to design modifications, specifications,
              drawings, or written instructions which Sulzer is directed by
              Tutogen to follow, but only if such alleged infringement or
              violation does not reside in corresponding Processed Tissue of
              Sulzer's design or selection; or (b) arises from adherence to
              instructions to apply Tutogen's trademark, trade name, or other
              company identification; or (c) resides in a Processed Tissue which
              is not of Sulzer's origin and which is furnished by Tutogen to
              Sulzer for use under this Agreement; or (d) relates to use of
              Processed Tissues or other items provided by Sulzer in combination
              with other Processed Tissues or other items, furnished either by
              Sulzer or others, which combination was not installed, recommended
              or otherwise approved by Sulzer. In the foregoing cases numbered
              (a) through (d), Tutogen will defend and hold Sulzer harmless,
              subject to the same

CONFIDENTIAL                             U.S. Service Agreement - page 10


              terms and conditions and exceptions stated above with respect to
              Sulzer's rights and obligations under this clause.

8.7  Limitation of Liability to Third Parties. The liability of Tutogen and
     ----------------------------------------
     Sulzer with respect to any and all claims, actions, proceedings, or suits
     by any third party alleging infringement of patents, trademarks, or
     copyrights or violation of trade secrets or proprietary rights because of,
     or in connection with, any items furnished pursuant to this Agreement shall
     be limited to the specific undertakings contained in this Section 8.

8.8  Exclusion of Consequential Damages.  Neither Tutogen nor Sulzer shall in
     ----------------------------------
     any event or under any circumstances, including, but not limited to
     liability, delay, or warranty, be liable to the other for special or
     consequential damages, including but not limited to, loss of profit or
     revenue, loss of use of production line, or claims by customers for service
     interruptions. The remedies for the parties set forth in this Agreement are
     exclusive.

8.9  RTI Agreement.  Notwithstanding anything herein to the contrary, nothing in
     -------------
     this Agreement is intended to be, or shall be construed as being, a breach,
     anticipatory or otherwise, of the RTI Agreement as it existed following
     amendment on 28 June 1999.

9.  Miscellaneous Provisions

9.1  Entire Agreement.
     ----------------

       9.1.1  This Agreement, together with the Xenograft Distribution Agreement
              and the Processed Tissue Development and License Agreement, all
              between the parties or their Affiliates of even date, embodies the
              final, complete, and exclusive understanding between the parties
              and supersedes all previous agreements, understandings, or
              arrangements between the parties with respect to its subject
              matter.

       9.1.2  No modification or waiver of any terms or conditions hereof, nor
              any representations or warranties will be of any force or effect
              unless such modification or waiver is in writing and signed by an
              authorized officer of the party against whom enforcement is
              sought.

9.2  Force Majeure.  Neither party will be liable to the other for its failure
     -------------
     to perform any of its obligations under this Agreement only during any
     period in which such performance is delayed because of, or rendered
     impracticable or impossible due to, circumstances beyond its reasonable
     control, including but not limited to, strike, fire, flood, earthquake,
     windstorm, governmental acts or orders or restrictions (including acts of
     regulatory authorities and changes in the regulatory scheme for a Processed
     Tissue), failure of suppliers, or any other reason to the extent that the
     failure to perform is beyond the reasonable control and not caused by the
     negligence or willful misconduct of the non-performing party, provided that
     the party experiencing the delay promptly notifies the other of the delay.

9.3  Notices.  All notices concerning this Agreement will be written in the
     -------
     English language and will be deemed to have been received (a) two days
     after being properly sent by commercial overnight courier, or (b) one day
     after being transmitted by confirmed facsimile, in each case addressed to
     the address below:

CONFIDENTIAL                                 U.S. Service Agreement - Page 11


      If to Tutogen:

      Tutogen Medical, Inc.
      925 Allwood Road
      Clifton, NJ 07012
      USA
      Attention: President and CEO
      Telephone: 1 (973) 365-2799
      Facsimile: 1 (973) 365-1690

      With a copy to:

      Tutogen Medical GmbH
      IndustriestraBe 6,
      D-91077 Neunkirchen am Brand
      GERMANY
      Attention: President and CEO
      Telephone: 49 (9134) 99 88 110
      Facsimile: 49 (9134) 99 88 119

      and

      Dr. Dirk Lange
      Foerster + Rutow
      Irrerstr. 17-19
      90403 Nurnberg
      GERMANY
      Telephone: 49 (911) 23 569 00
      Facsimile: 49 (911) 23 569 11

      If to Sulzer:

      Sulzer Calcitek Inc.
      1900 Aston Avenue
      Carlsbad, California 92008-7308
      U.S.A.
      Attention: President
      Telephone: 1 (760) 431-9515
      Facsimile: 1 (760) 431-9753

      With a copy to:

      Sulzer Medica USA Inc.
      3 East Greenway Plaza, Suite 1600
      Houston, Texas 77046
      U.S.A.
      Attention: General Counsel
      Telephone: 1 (713) 561-6365
      Facsimile: 1 (713) 561-6380

CONFIDENTIAL                                 U.S. Service Agreement - Page 12


9.4  Governing Law.  Recognizing that the laws within the United States and
     -------------
     international jurisdictions vary in their content and effect with respect
     to similar subject matter, and that the parties desire uniformity and
     predictability in interpretation and enforcement of this Agreement and
     related agreements with international scope made contemporaneously by the
     parties and their Affiliates, the parties have agreed to the following
     provisions regarding applicable law to govern this Agreement: All matters
     affecting the interpretation, form, validity, and performance of this
     Agreement shall be decided under the laws of Switzerland.  The United
     Nations Convention on Contracts for the International Sale of Goods of
     April 11, 1980 shall not be applicable.

9.5  Partial Invalidity.  In the event that any provision of this Agreement will
     ------------------
     be unenforceable or invalid under any applicable law or be so held by
     applicable court decision, such unenforceability or invalidity will not
     render this Agreement unenforceable or invalid as a whole, and, in such
     event, such provision will be changed and interpreted so as best to
     accomplish the objectives of such unenforceable or invalid provision within
     the limits of the applicable law or applicable court decisions.

9.6  Independent Contractors.  Each party will act as an independent contractor
     -----------------------
     under the terms of this Agreement.  Except as otherwise provided in this
     Agreement, neither party is, nor will it be deemed to be, an employee,
     agent, partner, co-venturer, or legal representative of the other for any
     purpose.

9.7  Nonassignability.  Neither this Agreement nor any of the rights, interests,
     ----------------
     duties, or obligations under this Agreement shall be assigned or delegated,
     in whole or in part, by operation of law or otherwise by any party without
     the prior written consent of the other party, except that either party may
     assign this Agreement to an Affiliate of such party; provided that, in no
     event shall a party assign to an Affiliate less than the entirety of its
     rights and obligations under this Agreement. Any assignment made in
     violation of this Section 9.7 will be void and of no effect.  Subject to
     this Section 9.7, this Agreement shall be binding upon, inure to the
     benefit of, and be enforceable by and against, the parties and their
     Permitted Successors.

9.8  Compliance With Laws.  Notwithstanding other provisions in this Agreement
     --------------------
     regarding a failure to comply with laws, in performing this Agreement, each
     Party shall comply with all applicable laws and government regulations at
     all times, including but not limited to any applicable laws and regulations
     of the United States regarding the export or re-export or release of
     technology and technical data.

9.9  Arbitration.
     -----------

       9.9.1  In the event the Parties are unable to resolve any dispute or
              conflict arising from or relating to this Agreement within thirty
              (30) days after it is formally presented for resolution by written
              notice, any party may submit such conflict for resolution to the
              Chief Executive Officers of the parties.

       9.9.2  In the event the Chief Executive Officers of the parties are
              unable to resolve such conflict within thirty (30) days after
              having such conflict submitted to them for resolution, the dispute
              shall be finally settled under the Rules of Conciliation and
              Arbitration of the International

CONFIDENTIAL                                   U.S. Service Agreement - Page 13


              Chamber of Commerce in Paris ("Rules") by three arbitrators
              appointed in accordance with the Rules.

       9.9.3  The place of arbitration shall be Zurich.  The procedural law of
              this place shall apply where the Rules are silent.

       9.9.4  The arbitral award shall be substantiated in writing. The arbitral
              tribunal shall decide on the matter of costs of the arbitration.

       9.9.5  The language to be used in the arbitral proceedings shall be
              English.

9.10  Confidentiality.  The parties acknowledge that by reason of their
      ---------------
      relationship hereunder, each has had and will continue to have access to
      certain information and materials concerning the other's business, plans,
      customers, technology, and/or Processed Tissues that is considered by a
      party to be confidential ("Confidential Information") and of substantial
      value to that party, which value would be impaired if such information
      were disclosed to third parties. To the extent that such information is
      considered confidential, the disclosing party will so indicate to the
      receiving party, in the case of information in documentary or other
      tangible form, by labeling it conspicuously as "CONFIDENTIAL" (or words of
      similar import) and in the case of information conveyed verbally, by
      identifying same in writing within ten days after the first verbal
      disclosure. Each party agrees that it will not use in any way other than
      as expressly authorized or contemplated under this Agreement, nor disclose
      to any third party, any such Confidential Information revealed to it by
      the other party, and will take reasonable precautions (and will cause its
      Affiliates to take reasonable precautions) to protect the confidentiality
      of such information and with no less restrictive precautions than it takes
      to protect its own confidential information. Each party will disclose
      Confidential Information only to those of its employees who have a need to
      know such information. If Confidential Information is required to be
      disclosed in response to an order by a court or other government body, or
      if otherwise required to be disclosed by law, or if necessary to establish
      the rights of a party under this Agreement, the receiving party shall use
      reasonable efforts to provide the disclosing party with advance notice of
      such required disclosure to give the disclosing party sufficient time to
      seek a protective order or other protective measures, if any are
      available, for such Confidential Information. "Confidential Information"
      does not include information, materials, technical data or know-how which:
      (i) is rightfully in the possession of the receiving party at the time of
      disclosure as shown by the receiving party's files and records immediately
      prior to the time of disclosure; (ii) prior to or after the time of
      disclosure becomes part of the public knowledge or literature, not as a
      result of any inaction or action of the receiving party; (iii) is
      independently developed by a party without the use of any Confidential
      Information of the other parties; (iv) is obtained from any third party
      who is authorized to disclose such data and information without obligation
      of confidentiality, or (v) is approved for release by the disclosing
      party. This Section 9.10 shall survive termination of this Agreement for a
      period of two years.

9.11  Public Relations and Announcements.  The parties shall agree upon and
      ----------------------------------
      issue a press release upon the signing of this Agreement including a
      summary of the relationship established under this Agreement. No party
      shall issue a press release or any other published statement that refers
      to another party, its Affiliates or the other party's Processed Tissues
      without first obtaining the agreement of

CONFIDENTIAL                                   U.S. Service Agreement - Page 14


             such other party as to the form and content of the statement, which
             approval shall be timely and not unreasonably withheld.

             In witness whereof, the parties have each caused this Agreement to
     be signed and delivered by their duly authorized representatives on the
     dates set forth below in duplicate, each of which will be treated for all
     purposes as an original.

             Tutogen Medical, Inc.                     Sulzer Calcitek Inc.

     By: /s/ Manfred Kruger                  By: /s/ Steven E. Hanson
         ------------------                      --------------------
          Manfred Kruger, President              Steven E. Hanson, President
          and Chief Executive Officer

     Date: September 29, 2000                Date: September 29, 2000
           ------------------                      ------------------
CONFIDENTIAL                              U.S. Service Agreement - Page 15


                        Schedule A - Processed Tissues



Tissue Description                   Particle Size (microns)             Tissue Volume (cc)
- -------------------------------------------------------------------------------------------------
                                                                   
 Cancellous Chips                            250-1000                             0.5
- -------------------------------------------------------------------------------------------------
 Cancellous Chips                            250-1000                             1.0
- -------------------------------------------------------------------------------------------------
 Cancellous Chips                           1000-2000                             0.5
- -------------------------------------------------------------------------------------------------
 Cancellous Chips                           1000-2000                             1.0
- -------------------------------------------------------------------------------------------------
 Cancellous Chips                           1000-2000                             2.0
- -------------------------------------------------------------------------------------------------


CONFIDENTIAL                      Schedule A to U.S. Service Agreement - Page 1


                                  Schedule B

                             Sulzer's Service Fees

During the first Contract Year, Sulzer's Service Fee for a Processed Tissue
shall be equal to the difference between "Tutogen's Fee to Tissue User," as
hereafter defined, and the applicable Tutogen Processing Fee, as indicated in
the table that follows:



- ---------------------------------------------------------------------------------------
Processed Tissue                                        Tutogen Processing Fee
- ---------------------------------------------------------------------------------------
                                                     
Cancellous Chips, 250-1000 (micro), 0.5 cc                          *
- ---------------------------------------------------------------------------------------
Cancellous Chips, 250-1000 (micro), 1.0 cc                          *
- ---------------------------------------------------------------------------------------
Cancellous Chips, 1000-2000 (micro), 0.5 cc                         *
- ---------------------------------------------------------------------------------------
Cancellous Chips, 1000-2000 (micro), 1.0 cc                         *
- ---------------------------------------------------------------------------------------
Cancellous Chips, 1000-2000 (micro), 2.0 cc                         *
- ---------------------------------------------------------------------------------------


"Tutogen's Fee to Tissue User" shall be defined as the gross amount of the fee
invoiced to the user for the applicable Processed Tissue, less discounts and
allowances, returns, taxes and other levies by a governmental authority, and
unreimbursed shipping charges.

Sulzer and Tutogen shall confer and agree upon the amount of Sulzer's Service
Fee after the first Contract Year.



            *CONFIDENTIAL TREATMENT REQUEST BY SHEARMAN & STERLING.

CONFIDENTIAL                      Schedule B to U.S. Service Agreement - Page 1