Document:

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                                                                     Exhibit 4.1

                                                                  Execution Copy

                        WRIGHT ACQUISITION HOLDINGS, INC.

                          REGISTRATION RIGHTS AGREEMENT

            REGISTRATION RIGHTS AGREEMENT, dated as of December 7, 1999, among
the investors listed on Schedule I hereto (the "Investors") and Wright
Acquisition Holdings, Inc., a Delaware corporation (the "Company").

                                 R E C I T A L S

            WHEREAS, the Investors will, pursuant to the terms of the Amended
and Restated Agreement and Plan of Merger (the "Merger Agreement"), dated as of
December 7, 1999, by and among Wright Medical Technology, Inc., the Company,
Wright Acquisition Corp., Inc. and Warburg, Pincus Equity Partners, L.P.
("Warburg"), acquire shares of (i) Series A Voting Convertible Preferred Stock,
par value $0.01 per share, of the Company (the "Series A Preferred Stock"), and,
solely in the case of Warburg, shares of Series B Non-Voting Convertible
Preferred Stock, par value $.01 per share, of the Company (the "Series B
Preferred Stock" and, with the Series A Preferred Stock, the "Preferred Stock"),
(ii) Common Stock, par value $0.01 per share, of the Company ("Common Stock")
and (iii) warrants to purchase Common Stock ("Warrants"); and

            WHEREAS, the shares of Preferred Stock are convertible into
shares of Common Stock; and

            WHEREAS, the Company has agreed, as a condition precedent to
Warburg's obligations under the Merger Agreement, to grant the Investors certain
registration rights; and

            WHEREAS, the Company and the Investors desire to define the
registration rights of the Investors on the terms and subject to the conditions
herein set forth.

            NOW, THEREFORE, in consideration of the foregoing premises and for
other good and valuable consideration, the parties hereby agree as follows:

            1.    DEFINITIONS
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            As used in this Agreement, the following terms have the respective
meaning set forth below:

            COMMISSION:  shall mean the Securities and Exchange Commission or
any other federal agency at the time administering the Securities Act;

            EXCHANGE ACT:  shall mean the Securities Exchange Act of 1934, as
amended;

            HOLDER:  shall mean any holder of Registrable Securities;

            INITIAL PUBLIC OFFERING:  shall mean the initial public offering
of shares of Common Stock pursuant to a registration under the Securities Act;

            INITIATING HOLDER:  shall mean a Holder holding the amount of
Registrable Securities required to make a request for registration pursuant
to this Agreement.

            PERSON:  shall mean an individual, partnership, joint-stock
company, corporation, limited liability company, trust or unincorporated
organization, and a government or agency or political subdivision thereof;

            REGISTER, REGISTERED and REGISTRATION: shall mean a registration
effected by preparing and filing a registration statement in compliance with the
Securities Act (and any post-effective amendments filed or required to be filed)
and the declaration or ordering of effectiveness of such registration statement;

            REGISTRABLE SECURITIES: shall mean (A) shares of Common Stock
issuable upon conversion of the shares of Preferred Stock and upon exercise of
the Warrants, (B) any additional shares of Common Stock acquired by the
Investors, and (C) any additional shares of Common Stock issued as a dividend or
other distribution with respect to, or in exchange for or in replacement of, the
shares of Preferred Stock (whether by way of stock split, stock dividend, or in
connection with a combination of shares, reclassification, recapitalization,
stock exchange, merger, consolidation or otherwise) or Common Stock referred to
in clause (A) or (B);

            REGISTRATION EXPENSES: shall mean all expenses incurred by the
Company in compliance with Sections 2(a) and (b) hereof, including, without
limitation, all registration and
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filing fees, printing expenses, any reasonable fees and disbursements of
underwriters customarily paid by the issuers or sellers of securities, fees and
disbursements of counsel for the Company, fees and expenses of one counsel for
all the Holders in an amount not to exceed $15,000, blue sky fees and expenses
and the expense of any special audits and cold comfort letters incident to or
required by any such registration (but excluding the compensation of regular
employees of the Company, which shall be paid in any event by the Company);

            SECURITY, SECURITIES:  shall have the meaning set forth in
Section 2(1) of the Securities Act;

            SECURITIES ACT:  shall mean the Securities Act of 1933, as
amended; and

            SELLING EXPENSES: shall mean all underwriting discounts and selling
commissions applicable to the sale of Registrable Securities and all fees and
disbursements of counsel for each of the Holders other than fees and expenses of
one counsel for all the Holders in an amount not to exceed $15,000.

            2.    REGISTRATION RIGHTS

                  (a)  REQUESTED REGISTRATION.

                  (i) REQUEST FOR REGISTRATION. If the Company shall receive
      from an Initiating Holder, at any time, a written request that the Company
      effect any registration with respect to all or a part of the Registrable
      Securities, the Company will:

                  (A)   promptly give written notice of the proposed
            registration, qualification or compliance to all other Holders;
            and

                  (B) as soon as practicable, use its diligent best efforts to
            effect such registration (including, without limitation, the
            execution of an undertaking to file post-effective amendments,
            appropriate qualification under applicable blue sky or other state
            securities laws and appropriate compliance with applicable
            regulations issued under the Securities Act) as may be so requested
            and as would permit or facilitate the sale and distribution of all
            or such portion of such Registrable Securities as are specified in
            such request, together with all or such portion of the Registrable
            Securities of any Holder or Holders joining
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            in such request as are specified in a written request received by
            the Company within 20 business days after written notice from the
            Company is given under Section 2(a)(i)(A) above; PROVIDED that the
            Company shall not be obligated to effect, or take any action to
            effect, any such registration pursuant to this Section 2(a):

                              (x) In any particular jurisdiction in which the
               Company would be required to execute a general consent to service
               of process in effecting such registration, qualification or
               compliance, unless the Company is already subject to service in
               such jurisdiction and except as may be required by the Securities
               Act or applicable rules or regulations thereunder;

                              (y) After the Company has effected three (3) such
               registrations pursuant to this Section 2(a) and such
               registrations have been declared or ordered effective and the
               sales of such Registrable Securities shall have closed; or

                              (z) If the Registrable Securities requested by all
               Holders to be registered pursuant to such request do not have an
               anticipated aggregate public offering price (before any
               underwriting discounts and commissions) of not less than
               $15,000,000 (or $30,000,000 if such requested registration is the
               Initial Public Offering).

            The registration statement filed pursuant to the request of the
Initiating Holders may, subject to the provisions of Section 2(a)(ii) below,
include other securities of the Company which are held by Persons who, by virtue
of agreements with the Company, are entitled to include their securities in any
such registration ("Other Stockholders").

            The registration rights set forth in this Section 2 may be assigned,
in whole or in part, to any transferee of Registrable Securities (who shall be
bound by all obligations of this Agreement).

            (ii) UNDERWRITING. If the Initiating Holders intend to distribute
      the Registrable Securities covered by their request by means of an
      underwriting, they shall so advise the Company as a part of their request
      made pursuant to Section 2(a).
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            If Other Stockholders request such inclusion, the Holders shall
offer to include the securities of such Other Stockholders in the underwriting
and may condition such offer on their acceptance of the further applicable
provisions of this Section 2. The Holders whose shares are to be included in
such registration and the Company shall (together with all Other Stockholders
proposing to distribute their securities through such underwriting) enter into
an underwriting agreement in customary form with the representative of the
underwriter or underwriters selected for such underwriting by the Initiating
Holders and reasonably acceptable to the Company. Notwithstanding any other
provision of this Section 2(a), if the representative advises the Holders in
writing that marketing factors require a limitation on the number of shares to
be underwritten, the securities of the Company held by Other Stockholders shall
be excluded from such registration to the extent so required by such limitation.
If, after the exclusion of such shares, further reductions are still required,
the number of shares included in the registration by each Holder shall be
reduced on a pro rata basis (based on the number of shares held by such Holder),
by such minimum number of shares as is necessary to comply with such request. No
Registrable Securities or any other securities excluded from the underwriting by
reason of the underwriter's marketing limitation shall be included in such
registration. If any Other Stockholder who has requested inclusion in such
registration as provided above disapproves of the terms of the underwriting,
such person may elect to withdraw therefrom by written notice to the Company,
the underwriter and the Holders. The securities so withdrawn shall also be
withdrawn from registration. If the underwriter has not limited the number of
Registrable Securities or other securities to be underwritten, the Company and
officers and directors of the Company may include its or their securities for
its or their own account in such registration if the representative so agrees
and if the number of Registrable Securities and other securities which would
otherwise have been included in such registration and underwriting will not
thereby be limited.

            Notwithstanding the foregoing, if the Company shall furnish to
Initiating Holders requesting the filing of a registration statement pursuant to
Section 2(a)(i) a certificate signed by the President or Chief Executive Officer
of the Company stating that, in the good faith judgment of the Board of
Directors of the Company, it would be seriously detrimental to the Company and
its stockholders for such registration statement to be filed and it is therefore
essential to defer the filing of such registration statement, then the Company
shall have the
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right to defer such filing for a period of not more than 90 days after receipt
of the request of the Initiating Holders; PROVIDED, HOWEVER, that the Company
may not utilize this right more than once in any twelve (12) month period.

                  (b)  COMPANY REGISTRATION.

                  (i) If the Company shall determine to register any of its
      equity securities either for its own account or for the account of Other
      Stockholders, other than a registration relating solely to employee
      benefit plans, or a registration relating solely to a Commission Rule 145
      transaction, or a registration on any registration form which does not
      permit secondary sales or does not include substantially the same
      information as would be required to be included in a registration
      statement covering the sale of Registrable Securities, the Company will:

                        (A) promptly give to each of the Holders a written
         notice thereof (which shall include a list of the jurisdictions in
         which the Company intends to attempt to qualify such securities under
         the applicable blue sky or other state securities laws); and

                        (B) include in such registration (and any related
         qualification under blue sky laws or other compliance), and in any
         underwriting involved therein, all the Registrable Securities specified
         in a written request or requests, made by the Holders within twenty
         (20) days after receipt of the written notice from the Company
         described in clause (i) above, except as set forth in Section 2(b)(ii)
         below. Such written request may specify all or a part of the Holders'
         Registrable Securities.

            (ii) UNDERWRITING. If the registration of which the Company gives
      notice is for a registered public offering involving an underwriting, the
      Company shall so advise each of the Holders as a part of the written
      notice given pursuant to Section 2(b)(i)(A). In such event, the right of
      each of the Holders to registration pursuant to this Section 2(b) shall be
      conditioned upon such Holders' participation in such underwriting and the
      inclusion of such Holders' Registrable Securities in the underwriting to
      the extent provided herein. The Holders whose shares are to be included in
      such registration shall (together with the Company and the Other
      Stockholders distributing their securities through such underwriting)
      enter into an
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      underwriting agreement in customary form with the representative of the
      underwriter or underwriters selected for underwriting by the Company.
      Notwithstanding any other provision of this Section 2(b), if the
      representative determines that marketing factors require a limitation on
      the number of shares to be underwritten, and (x) if such registration is
      the Initial Public Offering, the representative may (subject to the
      allocation priority set forth below) exclude from such registration and
      underwriting some or all of the Registrable Securities which would
      otherwise be underwritten pursuant hereto, and (y) if such registration is
      other than the Initial Public Offering, the representative may (subject to
      the allocation priority set forth below) limit the number of Registrable
      Securities to be included in the registration and underwriting to not less
      than twenty five percent (25%) of the shares included therein (based on
      the number of shares). The Company shall so advise all holders of
      securities requesting registration, and the number of shares of securities
      that are entitled to be included in the registration and underwriting
      shall be allocated in the following manner: the number of shares of
      securities of the Company held by Holders, officers, directors and Other
      Stockholders of the Company shall be excluded from such registration and
      underwriting to the minimum extent required by such limitation on a pro
      rata basis (based on the number of shares held by such Holders, officers,
      directors and Other Stockholders); PROVIDED, that if the representative
      later determines that such offering would be materially and adversely
      affected by the inclusion of such shares, including by reason of the
      identity of the holders thereof or that any such holders are employees of
      the Company, the representative may exclude all or, in such manner and
      number as the representative deems appropriate, a portion of such shares
      from such offering. If any of the Holders or any officer, director or
      Other Stockholder disapproves of the terms of any such underwriting, he
      may elect to withdraw therefrom by written notice to the Company and the
      underwriter. Any Registrable Securities or other securities excluded or
      withdrawn from such underwriting shall be withdrawn from such
      registration.

                  (c) FORM S-3. Following the Initial Public Offering, the
Company shall use its best efforts to qualify for registration on Form S-3 for
secondary sales. After the Company has qualified for the use of Form S-3, the
Investors shall have the right to request three (3) registrations in the
aggregate on Form S-3 in addition to the rights provided for in Section 2(a)
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of this Agreement (such requests shall be in writing and shall state the number
of shares of Registrable Securities to be disposed of and the intended method of
disposition of shares by such holders), subject only to the following:

                  (i) The Company shall not be required to effect a registration
      pursuant to this Section 2(c) unless the Holder or Holders requesting
      registration propose to dispose of shares of Registrable Securities having
      an aggregate price to the public (before deduction of underwriting
      discounts and expenses of sale) of more than $5,000,000.

                  (ii) The Company shall not be required to effect a
      registration pursuant to this Section 2(c) within 180 days of the
      effective date of the most recent registration pursuant to this Section 2
      in which securities held by the requesting Holder could have been included
      for sale or distribution.

                  (iii) The Company shall not be obligated to effect any
      registration pursuant to this Section 2(c) in any particular jurisdiction
      in which the Company would be required to execute a general consent to
      service of process in effecting such registration, qualification or
      compliance, unless the Company is already subject to service in such
      jurisdiction and except as may be required by the Securities Act or
      applicable rules or regulations thereunder.

                  (iv) The Company shall not be required to effect a
      registration pursuant to this Section 2(c) if the Company shall furnish to
      the Holders a certificate signed by the President or Chief Executive
      Officer of the Company stating that in the good faith judgment of the
      Board of Directors of the Company, it would be seriously detrimental to
      the Company and its stockholders for such registration statement to be
      filed and it is therefore essential to defer the filing of such
      registration statement. In such event, the Company shall have the right to
      defer the filing of the registration statement no more than once during
      any twelve (12) month period for a period of not more than ninety (90)
      days after receipt of the request of the Holder or Holders under this
      Section 2(c)(iii).

      The Company shall give written notice to all Holders of the receipt of a
request for registration pursuant to this Section 2(c) and shall allow other
Holders twenty (20) days to provide written notice that such other Holders wish
to participate in the registration, provided that if the registration is for an
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underwritten offering, the terms of Section 2(a)(ii) shall apply to all
participants in such offering. Subject to the foregoing, the Company will use
its best efforts to effect promptly the registration of all shares of
Registrable Securities on Form S-3 to the extent requested by the Holder or
Holders thereof for purposes of disposition.

                  (d) EXPENSES OF REGISTRATION. All Registration Expenses
incurred in connection with any registration, qualification or compliance
pursuant to this Section 2 shall be borne by the Company, and all Selling
Expenses shall be borne by the Holders of the securities so registered pro rata
on the basis of the number of their shares so registered.

                  (e) REGISTRATION PROCEDURES. In the case of each registration
effected by the Company pursuant to this Section 2, the Company will keep the
Holders, as applicable, advised in writing as to the initiation of each
registration and as to the completion thereof. At its expense, the Company will:

                  (i) keep such registration effective for a period of one
      hundred twenty (120) days or until the Holders, as applicable, have
      completed the distribution described in the registration statement
      relating thereto, whichever first occurs; provided, however, that (A) such
      120-day period shall be extended for a period of time equal to the period
      during which the Holders, as applicable, refrain from selling any
      securities included in such registration in accordance with the provisions
      in Section 2(i) hereof; and (B) in the case of any registration of
      Registrable Securities on Form S-3 which are intended to be offered on a
      continuous or delayed basis, such 120-day period shall be extended until
      all such Registrable Securities are sold, provided that Rule 415, or any
      successor rule under the Securities Act, permits an offering on a
      continuous or delayed basis, and provided further that applicable rules
      under the Securities Act governing the obligation to file a post-effective
      amendment permit, in lieu of filing a post-effective amendment which (y)
      includes any prospectus required by Section 10(a) of the Securities Act or
      (z) reflects facts or events representing a material or fundamental change
      in the information set forth in the registration statement, the
      incorporation by reference of information required to be included in (y)
      and (z) above to be contained in periodic reports filed pursuant to
      Section 12 or 15(d) of the Exchange Act in the registration statement;
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                  (ii) furnish such number of prospectuses and other documents
      incident thereto as each of the Holders, as applicable, from time to time
      may reasonably request;

                  (iii) notify each Holder of Registrable Securities covered by
      such registration at any time when a prospectus relating thereto is
      required to be delivered under the Securities Act of 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 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

                  (iv) furnish, on the date that such Registrable Securities are
      delivered to the underwriters for sale, if such securities are being sold
      through underwriters or, if such securities are not being sold through
      underwriters, on the date that the registration statement with respect to
      such securities becomes effective, (1) an opinion, dated as of such date,
      of the counsel representing the Company for the purposes of such
      registration, in form and substance as is customarily given to
      underwriters in an underwritten public offering and reasonably
      satisfactory to the Holders holding a majority in interest of the
      Registrable Securities being included in such registration, addressed to
      the underwriters, if any, and to the Holders participating in such
      registration and (2) a letter, dated as of such date, from the independent
      certified public accountants of the Company, in form and substance as is
      customarily given by independent certified public accountants to
      underwriters in an underwritten public offering and reasonably
      satisfactory to the Holders holding a majority in interest of the
      Registrable Securities being included in such registration, addressed to
      the underwriters, if any, and if permitted by applicable accounting
      standards, to the Holders participating in such registration.

                  (f)  INDEMNIFICATION.

                  (i) The Company will indemnify each of the Holders, as
      applicable, each of its officers, directors and partners, and each person
      controlling each of the Holders, with respect to each registration which
      has been effected pursuant to this Section 2, and each underwriter, if
      any, and each person who controls any underwriter, against all claims,
      losses, damages and liabilities (or actions in
<PAGE>

      respect thereof) arising out of or based on any untrue statement (or
      alleged untrue statement) of a material fact contained in any prospectus,
      offering circular or other document (including any related registration
      statement, notification or the like) incident to any such registration,
      qualification or compliance, or based on 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, or any
      violation by the Company of the Securities Act or the Exchange Act or any
      rule or regulation thereunder applicable to the Company and relating to
      action or inaction required of the Company in connection with any such
      registration, qualification or compliance, and will reimburse each of the
      Holders, each of its officers, directors and partners, and each person
      controlling each of the Holders, each such underwriter and each person who
      controls any such underwriter, for any legal and any other expenses
      reasonably incurred in connection with investigating and defending any
      such claim, loss, damage, liability or action, provided that the Company
      will not be liable in any such case to the extent that any such claim,
      loss, damage, liability or expense arises out of or is based on (A) any
      untrue statement or omission based upon written information furnished to
      the Company by the Holders or underwriter and stated to be specifically
      for use therein or (B) any sale of Registrable Securities sold in reliance
      upon a defective prospectus, offering circular or other document by the
      Holders or underwriter, if the Company advised such Holders or underwriter
      in writing not to sell Registrable Securities in reliance upon such
      prospectus, offering circular or other document.

                  (ii) Each of the Holders will, if Registrable Securities held
      by it are included in the securities as to which such registration,
      qualification or compliance is being effected, indemnify the Company, each
      of its directors and officers and each underwriter, if any, of the
      Company's securities covered by such a registration statement, each person
      who controls the Company or such underwriter, each other Holder and each
      other Holder's officers, directors and partners or affiliates, and each
      Person controlling such other Holder, each Other Stockholder and each of
      their officers, directors, and partners or affiliates, and each person
      controlling such Other Stockholder against all claims, losses, damages and
      liabilities (or actions in respect thereof) arising out of or based on any
      untrue statement (or alleged untrue statement) of a material fact
<PAGE>

     contained in any such registration statement, prospectus, offering
      circular or other document made by such Holder, or any omission (or
      alleged omission) to state therein a material fact required to be stated
      therein or necessary to make the statements by such Holder therein not
      misleading, and will reimburse the Company, the other Holders, any
      underwriters and such Other Stockholders and their directors, officers,
      partners or control persons for any legal or any other expenses reasonably
      incurred in connection with investigating or defending any such claim,
      loss, damage, liability or action, in each case to the extent, but only to
      the extent, that such untrue statement (or alleged untrue statement) or
      omission (or alleged omission) is made in such registration statement,
      prospectus, offering circular or other document in reliance upon and in
      conformity with written information furnished to the Company by such
      Holder and stated to be specifically for use therein; provided, however,
      that the obligations of each of the Holders hereunder shall be limited to
      an amount equal to the net proceeds to such Holder of securities sold as
      contemplated herein.

                  (iii) Each party entitled to indemnification under this
      Section 2(f) (the "Indemnified Party") shall give notice to the party
      required to provide indemnification (the "Indemnifying Party") promptly
      after such Indemnified Party has actual knowledge of any claim as to which
      indemnity may be sought, and shall permit the Indemnifying Party to assume
      the defense of any such claim or any litigation resulting therefrom;
      provided that counsel for the Indemnifying Party, who shall conduct the
      defense of such claim or any litigation resulting therefrom, shall be
      approved by the Indemnified Party (whose approval shall not unreasonably
      be withheld) and the Indemnified Party may participate in such defense at
      such party's expense (unless the Indemnified Party shall have reasonably
      concluded that there may be a conflict of interest between the
      Indemnifying Party and the Indemnified Party or between the Indemnified
      Parties in such action, in which case the fees and expenses of one
      separate counsel for the Indemnified Parties shall be at the expense of
      the Indemnifying Party), 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 under this Section 2 except to the
      extent the Indemnifying Party is materially prejudiced thereby. No
      Indemnifying Party, in the defense of any such claim or litigation shall,
      except with the consent of each
<PAGE>

      Indemnified Party, consent to entry of any judgment or enter into any
      settlement which 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. Each
      Indemnified Party shall furnish such information regarding itself or the
      claim in question as an Indemnifying Party may reasonably request in
      writing and as shall be reasonably required in connection with the defense
      of such claim and litigation resulting therefrom.

                  (iv) If the indemnification provided for in this Section 2(f)
      is held by a court of competent jurisdiction to be unavailable to an
      Indemnified Party with respect to any loss, liability, claim, damage or
      expense referred to herein, then the Indemnifying Party, in lieu of
      indemnifying such Indemnified Party hereunder, shall contribute to the
      amount paid or payable by such Indemnified Party as a result of such loss,
      liability, claim, damage or expense in such proportion as is appropriate
      to reflect the relative fault of the Indemnifying Party on the one hand
      and of the Indemnified Party on the other in connection with the
      statements or omissions which resulted in such loss, liability, claim,
      damage or expense, as well as any other relevant equitable considerations.
      The relative fault of the Indemnifying Party and of the Indemnified Party
      shall be determined by reference to, among other things, whether the
      untrue (or alleged untrue) statement of a material fact or the omission
      (or alleged omission) to state a material fact relates to information
      supplied by the Indemnifying Party or by the Indemnified Party and the
      parties' relative intent, knowledge, access to information and opportunity
      to correct or prevent such statement or omission.

                  (v) Notwithstanding the foregoing, to the extent that the
      provisions on indemnification and contribution contained in the
      underwriting agreement entered into in connection with any underwritten
      public offering contemplated by this Agreement are in conflict with the
      foregoing provisions, the provisions in such underwriting agreement shall
      be controlling.

                  (vi) The foregoing indemnity agreement of the Company and
      Holders is subject to the condition that, insofar as they relate to any
      loss, claim, liability or damage made in a preliminary prospectus but
      eliminated or remedied in the amended prospectus on file with the
      Commission at the time the registration statement in
<PAGE>

      question becomes effective or the amended prospectus filed with the
      Commission pursuant to Commission Rule 424(b) (the "Final Prospectus"),
      such indemnity or contribution agreement shall not inure to the benefit of
      any underwriter or Holder if a copy of the Final Prospectus was furnished
      to the underwriter or Holder and was not furnished to the person asserting
      the loss, liability, claim or damage at or prior to the time such action
      is required by the Securities Act.

                  (g)  INFORMATION BY THE HOLDERS.

                  (i) Each of the Holders holding securities included in any
      registration shall furnish to the Company such information regarding such
      Holder and the distribution proposed by such Holder as the Company may
      reasonably request in writing and as shall be reasonably required in
      connection with any registration, qualification or compliance referred to
      in this Section 2.

                  (ii) In the event that, either immediately prior to or
      subsequent to the effectiveness of any registration statement, any Holder
      shall distribute Registrable Securities to its partners or affiliates,
      such Holder shall so advise the Company and provide such information as
      shall be necessary to permit an amendment to such registration statement
      to provide information with respect to such partners or affiliates, as
      selling securityholders. Promptly following receipt of such information,
      the Company shall file an appropriate amendment to such registration
      statement reflecting the information so provided. Any incremental expense
      to the Company resulting from such amendment shall be borne by such
      Holder.

                  (h)  RULE 144 REPORTING.

            With a view to making available the benefits of certain rules and
regulations of the Commission which may permit the sale of restricted securities
to the public without registration, the Company agrees to:

                  (i) make and keep public information available as those terms
      are understood and defined in Rule 144 under the Securities Act ("Rule
      144"), at all times from and after ninety (90) days following the
      effective date of the first registration under the Securities Act filed by
      the Company for an offering of its securities to the general public;
<PAGE>

                  (ii) use its best efforts to file with the Commission in a
      timely manner all reports and other documents required of the Company
      under the Securities Act and the Exchange Act at any time after it has
      become subject to such reporting requirements; and

                  (iii) so long as the Holder owns any Registrable Securities,
      furnish to the Holder upon request, a written statement by the Company as
      to its compliance with the reporting requirements of Rule 144 (at any time
      from and after ninety (90) days following the effective date of the first
      registration statement filed by the Company for an offering of its
      securities to the general public), and of the Securities Act and the
      Exchange Act (at any time after it has become subject to such reporting
      requirements), a copy of the most recent annual or quarterly report of the
      Company, and such other reports and documents so filed as the Holder may
      reasonably request in availing itself of any rule or regulation of the
      Commission allowing the Holder to sell any such securities without
      registration.

                  (i) "MARKET STAND-OFF" AGREEMENT. Each of the Holders agrees,
if requested by the Company and an underwriter of equity securities of the
Company, not to sell or otherwise transfer or dispose of any Registrable
Securities held by such Holder during the 180-day period following the effective
date of a registration statement of the Company filed under the Securities Act,
provided that:

                   (i)  such agreement only applies to the Initial Public
      Offering; and

                  (ii)  all officers and directors of the Company enter into
      similar agreements.

      If requested by the underwriters, the Holders shall execute a separate
agreement to the foregoing effect. The Company may impose stop-transfer
instructions with respect to the shares (or securities) subject to the foregoing
restriction until the end of said 180-day period. The provisions of this Section
2(i) shall be binding upon any transferee who acquires Registrable Securities.

                  (j) TERMINATION. The registration rights set forth in this
Section 2 shall not be available with respect to Registrable Securities of any
Holder if, in the opinion of counsel to the Company, all of the Registrable
Securities then owned by such Holder could be sold in any 90-day period pursuant
<PAGE>

to Rule 144 (without giving effect to the provisions of Rule 144(k)).

            3.  MISCELLANEOUS

                  (a) DIRECTLY OR INDIRECTLY. Where any provision in this
Agreement refers to action to be taken by any Person, or which such Person is
prohibited from taking, such provision shall be applicable whether such action
is taken directly or indirectly by such Person.

                  (b) GOVERNING LAW. This Agreement shall be governed by and
construed in accordance with the laws of the State of New York applicable to
contracts made and to be performed entirely within such State.

                  (c)  SECTION HEADINGS.  The headings of the sections and
subsections of this Agreement are inserted for convenience only and shall not
be deemed to constitute a part thereof.

                  (d)  NOTICES.

                  (i) All communications under this Agreement shall be in
      writing and shall be delivered by hand or facsimile or mailed by overnight
      courier or by registered or certified mail, postage prepaid:

                        (A)   if to the Company, to 5677 Airline Road,
            Arlington, TN 38002, Attention: President (facsimile:
            (901) 867-4320 or at such other address as it may have furnished
            in writing to the Investors;

                        (B) if to the Investors, at the address or facsimile
            number listed on Schedule I hereto, or at such other address or
            facsimile number as may have been furnished the Company in writing.

                  (iii) Any notice so addressed shall be deemed to be given: if
      delivered by hand or facsimile, on the date of such delivery; if mailed by
      courier, on the first business day following the date of such mailing; and
      if mailed by registered or certified mail, on the third business day after
      the date of such mailing.

                  (e) REPRODUCTION OF DOCUMENTS. This Agreement and all
documents relating thereto, including, without limitation, any consents, waivers
and modifications which may
<PAGE>

hereafter be executed may be reproduced by the Investor by any photographic,
photostatic, microfilm, microcard, miniature photographic or other similar
process and the Investors may destroy any original document so reproduced. The
parties hereto agree and stipulate that any such reproduction shall be
admissible in evidence as the original itself in any judicial or administrative
proceeding (whether or not the original is in existence and whether or not such
reproduction was made by the Investors in the regular course of business) and
that any enlargement, facsimile or further reproduction of such reproduction
shall likewise be admissible in evidence.

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

                  (g) ENTIRE AGREEMENT; AMENDMENT AND WAIVER. This Agreement
constitutes the entire understanding of the parties hereto and supersedes all
prior understanding among such parties. This Agreement may be amended, and the
observance of any term of this Agreement may be waived, with (and only with) the
written consent of the Company and the Investors.

                  (h) SEVERABILITY. In the event that any part or parts of this
Agreement shall be held illegal or unenforceable by any court or administrative
body of competent jurisdiction, such determination shall not effect the
remaining provisions of this Agreement which shall remain in full force and
effect.

                  (i) COUNTERPARTS. This Agreement may be executed in one or
more counterparts, each of which shall be deemed an original and all of which
together shall be considered one and the same agreement.

<PAGE>

            IN WITNESS WHEREOF, the undersigned have executed this Agreement as
of the date first set forth above.

                                    WRIGHT ACQUISITION HOLDINGS, INC.

                                    By:   /s/ Elizabeth H. Weatherman
                                       -----------------------------------------
                                          Name:   Elizabeth H. Weatherman
                                          Title:  President

                                   INVESTORS:

                                    WARBURG, PINCUS EQUITY PARTNERS, L.P.

                                    By:   Warburg, Pincus & Co.,
                                          General Partner

                                    By:   /s/ Elizabeth H. Weatherman
                                       -----------------------------------------
                                          Name:   Elizabeth H. Weatherman
                                          Title:  Partner

                                    WARBURG, PINCUS NETHERLANDS EQUITY PARTNERS
                                          I, C.V.

                                    By:   Warburg, Pincus & Co.,
                                          General Partner

                                    By:   /s/ Elizabeth H. Weatherman
                                       -----------------------------------------
                                          Name:   Elizabeth H. Weatherman
                                          Title:  Partner

                                    WARBURG, PINCUS NETHERLANDS EQUITY PARTNERS
                                          II, C.V.

                                    By:   Warburg, Pincus & Co.,
                                          General Partner

<PAGE>

                                    By:   /s/ Elizabeth H. Weatherman
                                       -----------------------------------------
                                          Name:   Elizabeth H. Weatherman
                                          Title:  Partner

                                    WARBURG, PINCUS NETHERLANDS EQUITY PARTNERS
                                          III, C.V.

                                    By:   Warburg, Pincus & Co.,
                                          General Partner

                                    By:   /s/ Elizabeth H. Weatherman
                                       -----------------------------------------
                                          Name:   Elizabeth H. Weatherman
                                          Title:  Partner

                                    VERTICAL FUND ASSOCIATES, L.P.

                                    By:   Vertical Group, L.P.,General Partner

                                    By:   /s/ John E. Runnells
                                          --------------------------------------
                                          Name:   John E. Runnells
                                          Title:  General Partner

                                    CALIFORNIA PUBLIC EMPLOYEES'
                                    RETIREMENT SYSTEM

                                    By:   /s/ Leon G. Shahinian
                                          --------------------------------------
                                          Name:  Leon G. Shahinian
                                          Title: Investment Officer II

                                    PRINCES GATE INVESTORS, L.P.
                                    PGI INVESTMENTS LIMITED
                                    PGI SWEDEN AB
                                    MARINBEACH UNITED S.A.

                                    By:   PG Investors, Inc., as General
                                          Partner or Attorney-in-Fact

<PAGE>

                                    By:   /s/ Thomas A. Clayton
                                          ------------------------------
                                          Name:    Thomas A. Clayton
                                          Title:   Vice President<PAGE>

                                                                     EXHIBIT 4.2

                            INVESTOR RIGHTS AGREEMENT

            Stockholders Agreement, dated as of this 22nd day of December, 1999,
among the investors listed on Schedule I hereto (the "Investors"), Warburg,
Pincus Equity Partners, L.P., a Delaware limited partnership ("Warburg") and
Wright Acquisition Holdings, Inc., a Delaware corporation (the "Company").

                                 R E C I T A L S

            WHEREAS, certain of the Investors have, pursuant to the terms of an
Agreement for the Sale and Purchase of Cremascoli Ortho Holding S.A. dated as of
December 11, 1999, among Orthopaedics Holdings, the Company and the other
persons named therein (the "Merger Agreement"), been issued shares of capital
stock of the Company; and

            WHEREAS, the Investors are party to a Stockholders Agreement dated
December 7, 1999, among the Company, Wright Medical Technology, Inc. and the
parties named therein (the "WMT Stockholders Agreement"), which grants the
Investors certain rights; and

            WHEREAS, the Investors are party to a Registration Rights Agreement
dated December 7, 1999, among the Company, and the parties named therein (the
"WMT Registration Rights Agreement"), which grants the Investors certain rights;
and

            WHEREAS, the Investors and the Company desire to promote their
mutual interests by agreeing to certain additional matters relating to the
operations of the Company and the disposition of shares of capital stock
("Shares") in the Company.

            NOW, THEREFORE, in consideration of the mutual covenants and
agreements herein contained, the parties hereto hereby agree as follows:

SECTION 1.  TRANSFER OF STOCK

            (a) TAG-ALONG RIGHTS.

            (i) Subject to the provisions of the WMT Stockholders Agreement, in
the event (A) Warburg intends to Transfer in one transaction or a series of
transactions in excess of thirty percent (30%) of the Shares beneficially held
by Warburg in the aggregate (other than to any of its Affiliates or to the
Company), Warburg shall notify the other Investors (the "TAG-ALONG INVESTORS"),
in writing, of such proposed Transfer and its terms and conditions. Within ten
(10) business days of the date of such notice, each other Tag-Along Investor
shall notify Warburg if it elects to participate in such Transfer. Any Tag-Along
Investor that fails to notify Warburg within such ten (10) business day period
shall be deemed to have waived its rights hereunder. Each Tag-Along Investor
that so notifies Warburg shall have the right to sell, at the same price and on
the same terms and conditions as Warburg, an amount of Shares equal to the
Shares the third party actually proposes to purchase multiplied by a fraction,
the numerator of which shall be the number of Shares issued and owned by such
Tag-Along Investor and the denominator of which shall be the aggregate number of
Shares issued and owned by Warburg

<PAGE>

and each Tag-Along Investor exercising its rights under this Section l(a)
(assuming, in the case of sales of Common Stock, full conversion of all
convertible securities held by Warburg and each Tag-Along Investor exercising
its rights under this Section l(a)).

            (ii) Notwithstanding anything contained in this Section l(a), in the
event that all or a portion of the purchase price consists of securities and the
sale of such securities to the Tag-Along Investors would require either a
registration under the Securities Act or the preparation of a disclosure
document pursuant to Regulation D under the Securities Act (or any successor
regulation) or a similar provision of any state securities law, then, at the
option of Warburg, any one or more of the Tag-Along Investors may receive, in
lieu of such securities, the fair market value of such securities in cash, as
determined in good faith by the Board.

            (b) DRAG-ALONG RIGHT.

            (i) Subject to the provisions of the WMT Stockholders Agreement, if
at any time and from time to time, Warburg desires to Transfer in a bona fide
arms' length sale all of its Shares to any Person or Persons who are not
Affiliates of Warburg (for purposes of this Section l(b), the "PROPOSED
TRANSFEREE"), Warburg shall have the right (for purposes hereof, the "DRAG-ALONG
RIGHT") to require each other Investor to sell to the Proposed Transferee all of
his Shares (including any warrants or options to acquire Shares) for the same
per share consideration as proposed to be received by Warburg (less, in the case
of options or warrants, the exercise price for such options or warrants) then
held by such Investor. Each other Investor agrees to take all steps necessary
(including approving a sale via vote or written consent) to enable him or it to
comply with the provisions of this Section l(b) to facilitate Warburg's exercise
of a Drag-Along Right.

            (ii) To exercise a Drag-Along Right, Warburg shall give each other
Investor a written notice (for purposes of this Section l(b), a "DRAG-ALONG
NOTICE") containing (1) the name and address of the Proposed Transferee and (2)
the proposed purchase price, terms of payment and other material terms and
conditions of the Proposed Transferee's offer. Each other Investor shall
thereafter be obligated to sell its Shares (including any warrants or options
Held by such Investor), PROVIDED that the sale to the Proposed Transferee is
consummated within ninety (90) days of delivery of the Drag-Along Notice. If the
sale is not consummated within such 90-day period, then each other Investor
shall no longer be obligated to sell such other Investor's Shares pursuant to
that specific Drag-Along Right but shall remain subject to the provisions of
this Section l(b).

            (iii) Notwithstanding anything contained in this Section l(b), in
the event that all or a portion of the purchase price consists of securities and
the sale of such securities to the Investors would require either a registration
under the Securities Act or the preparation of a disclosure document pursuant to
Regulation D under the Securities Act (or any successor regulation) or a similar
provision of any state securities law, then, at the option of Warburg, the other
Investors may receive, in lieu of such securities, the fair market value of such
securities in cash, as determined in good faith by the Board.

            (c) INJUNCTIVE RELIEF. The Company and the Investors hereby declare
that it is impossible to measure in money the damages which will accrue to the
parties hereto by reason of

                                       2
<PAGE>

the failure of any Investor or the Company to perform any of its obligations set
forth in this Section 1. Therefore, the Company, Warburg and the Investors shall
have the right to specific performance of such obligations, and if any party
hereto shall institute any action or proceeding to enforce the provisions
hereof, each of the Company, Warburg and the Investors hereby waives the claim
or defense that the party instituting such action or proceeding has an adequate
remedy at law.

SECTION 2.  REGISTRATION RIGHTS

            (a) Each Investor hereby acknowledges and agrees that it is not
entitled to any rights pursuant to Section 2(a) of the WMT Registration Rights
Agreement (which entitles certain stockholders of the Company party to the WMT
Registration Rights Agreement with demand registration rights).

            (b) Subject to the provisions of Section 2(b) of the WMT
Registration Rights Agreement (which provides piggy-back registration rights),
each Investor shall be entitled to include in the proposed registration under
the Securities Act the same proportion of its Shares as the proportion of Shares
being registered by Warburg in such registration; PROVIDED, HOWEVER, that the
Company is only required to register the Eligible Shares of each Investor.

SECTION 3.  COMPULSORY TRANSFER

            (a) If an Investor's employment with the Company is terminated for
any reason, Warburg shall first have the right, and if this right is not
exercised then the Company shall have the right, to repurchase all of such
Investor's Shares for cash at a price equal to the Fair Market Value of such
Shares as of the date of cessation of the employment of such Investor.

            (b) If neither Warburg nor the Company exercise the right to
purchase the Shares of such Investor as provided for in Section 3(a) above, then
such Investor shall have the right to require the Company to purchase all of
such Investor's Shares. The price at which the Shares shall be purchased by the
Company shall be the Fair Market Value of the Shares as of the date of cessation
of the employment of such Investor. To the extent the Company repurchases Shares
pursuant to this Section 3(b), the repurchase price shall be payable pursuant to
a subordinated promissory note issued in a form prescribed and agreed to by the
parties hereto, with a term of seven years, bearing the "prime" rate of interest
as published in the Wall Street Journal and otherwise containing reasonable
terms to be agreed at such time.

            (c) All repurchase rights described in this Section 3 shall cease as
of the date of a Qualified Public Offering.

SECTION 4.  TERMINATION

            The Agreement shall terminate:

            (a) immediately subsequent to the closing of a Qualified Public
Offering; or

            (b) on the date on which Warburg and a majority of the other
Investors shall have agreed in writing to terminate this Agreement.

                                       3
<PAGE>

SECTION 5.  INTERPRETATION OF THIS AGREEMENT

            (a) TERMS DEFINED. Capitalized terms used but not defined herein
shall have the meaning assigned to such term in the WMT Shareholder Agreement.
As used in this Agreement, the following terms have the respective meaning set
forth below:

            AFFILIATE: shall mean any Person or entity, directly or indirectly
controlling, controlled by or under common control with such Person or entity.

            COMMISSION: shall mean the Securities and Exchange Commission or any
other federal agency at the time administering the Securities Act.

            ELIGIBLE SHARES: with respect to each Investor shall mean fifty
percent of the Shares owned on the date hereof together with any Shares acquired
by such Investor subsequent to the date hereof.

            EXCHANGE ACT: shall mean the Securities Exchange Act of 1934, as
amended.

            FAIR MARKET VALUE: shall mean the amount determined by the auditors
of the Company (acting as experts and not as arbitrators) to be the fair market
value of the Shares.

            PERSON: shall mean an individual, partnership, joint-stock company,
corporation, limited liability company, trust or unincorporated organization,
and a government or agency or political subdivision thereof.

            QUALIFIED PUBLIC OFFERING: shall have the meaning set forth in the
Purchase Agreement.

            SECURITY, SECURITIES: shall have the meaning set forth in Section
2(1) of the Securities Act.

            SECURITIES ACT: shall mean the Securities Act of 1933, as amended.

            TRANSFER: shall mean any sale, assignment, pledge, hypothecation, or
other disposition or encumbrance.

            (b) ACCOUNTING PRINCIPLES. Where the character or amount of any
asset or amount of any asset or liability or item of income or expense is
required to be determined or any consolidation or other accounting computation
is required to be made for the purposes of this Agreement, this shall be done in
accordance with U.S. generally accepted accounting principles at the time in
effect, to the extent applicable, except where such principles are inconsistent
with the requirements of this Agreement.

            (c) DIRECTLY OR INDIRECTLY. Where any provision in this Agreement
refers to action to be taken by any Person, or which such Person is prohibited
from taking, such provision shall be applicable whether such action is taken
directly or indirectly by such Person.

                                       4
<PAGE>

            (d) GOVERNING LAW. This Agreement shall be governed by and construed
in accordance with the laws of the State of Delaware applicable to contracts
made and to be performed entirely within such State.

            (e) SECTION HEADINGS. The headings of the sections and subsections
of this Agreement are inserted for convenience only and shall not be deemed to
constitute a part thereof.

SECTION 6.  MISCELLANEOUS

            (a) NOTICES.

            (i) All communications under this Agreement shall be in writing and
shall be delivered by hand or facsimile or mailed by overnight courier or by
registered or certified mail, postage prepaid:

                (A) if to any of the Investors, at the address or facsimile
number of such Investor shown on Schedule I, or at such other address as the
Investor may have furnished the Company in writing;

                (B) if to Warburg, at 466 Lexington Avenue, New York, New York
10017 (facsimile: (212) 878-9361), marked for attention of Elizabeth H.
Weatherman, or at such other address as Warburg may have furnished the Company
in writing; with a copy to Jeffrey R. Poss, Esq., at Willkie Farr & Gallagher,
787 Seventh Avenue, New York, New York 10019 (facsimile: (212) 728-8111); and

                (C) if to the Company, at 5677 Airline Road, Arlington,
Tennessee 38002 (facsimile: (901) 867-4398), marked for attention of President,
or at such other address as it may have furnished in writing to each of the
Investors.

            (ii) Any notice so addressed shall be deemed to be given: if
delivered by hand or facsimile, on the date of such delivery; if mailed by
courier, on the first business day following the date of such mailing; and if
mailed by registered or certified mail, on the third business day after the date
of such mailing.

            (b) REPRODUCTION OF DOCUMENTS. This Agreement and all documents
relating thereto, including, without limitation, (i) consents, waivers and
modifications which may hereafter be executed, (ii) documents received by each
Investor pursuant hereto and (iii) financial statements, certificates and other
information previously or hereafter furnished to each Investor, may be
reproduced by each Investor by a photographic, photostatic, microfilm,
microcard, miniature photographic or other similar process and each Investor may
destroy any original document so reproduced. All parties hereto agree and
stipulate that any such reproduction shall be admissible in evidence as the
original itself in any judicial or administrative proceeding (whether or not the
original is in existence and whether or not such reproduction was made by each
Investor in the regular course of business) and that any enlargement, facsimile
or further reproduction of such reproduction shall likewise be admissible in
evidence.

            (c) SUCCESSORS AND ASSIGNS. This Agreement shall inure to the
benefit of and be binding upon the successors and assigns of each of the
parties.

                                       5
<PAGE>

            (d) ENTIRE AGREEMENT; AMENDMENT AND WAIVER. This Agreement and the
Purchase Agreement constitute the entire understanding of the parties hereto
relating to the subject matter hereof and supersede all prior understandings
among such parties. This Agreement may be amended, and the observance of any
term of this Agreement may be waived with (and only with) the written consent of
the Warburg Investors and the other Investors.

            (e) SEVERABILITY. In the event that any part or parts of this
Agreement shall be held illegal or unenforceable by any court or administrative
body of competent jurisdiction, such determination shall not affect the
remaining provisions of this Agreement which shall remain in full force and
effect.

            (f) COUNTERPARTS. This Agreement may be executed in one or more
counterparts each of which shall be deemed an original and all of which together
shall be considered one and the same agreement.

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

                              WRIGHT ACQUISITION HOLDINGS, INC.

                              By:  /s/ Elizabeth Weatherman
                                   ----------------------------------
                                    Name:  Elizabeth Weatherman
                                    Title:

                              WARBURG, PINCUS EQUITY PARTNERS, L.P.

                              By:  Warburg, Pincus & Co., General Partner

                              By:  /s/ Elizabeth Weatherman
                                   ----------------------------------
                                    Name:  Elizabeth Weatherman
                                    Title:

                              /s/ Paul Donnelly
                              ---------------------------------------
                              Paul Donnelly

                              /s/ David Spruzen
                              ---------------------------------------
                              David Spruzen

                              /s/ John Fry
                              ---------------------------------------
                              John Fry

                              /s/ Patrizio Cremascoli
                              ---------------------------------------
                              Patrizio Cremascoli

                              /s/ Edgardo Cremascoli
                              ---------------------------------------
                              Edgardo Cremascoli

                                       6
<PAGE>

                              /s/ David Cremascoli
                              ---------------------------------------
                              David Cremascoli

                              /s/ Alain Allegre
                              ---------------------------------------
                              Alain Allegre

                              /s/ Giovanni Paolo Carollo
                              ---------------------------------------
                              Giovanni Paolo Carollo

                                       7

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