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                       SECURITIES AND EXCHANGE COMMISSION
                             WASHINGTON, D.C. 20549

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                                   SCHEDULE TO
                                 (RULE 14D-100)
                 TENDER OFFER STATEMENT UNDER SECTION 14 (d) (1)
          OR SECTION 13 (e) (1) OF THE SECURITIES EXCHANGE ACT OF 1934

                                (AMENDMENT NO. 6)

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                                CENTERPULSE LTD.
                       (Name of Subject Company (Issuer))

                            SMITH & NEPHEW GROUP PLC
                               SMITH & NEPHEW PLC
                      (Names of Filing Persons (Offerors))

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                REGISTERED SHARES, PAR VALUE CHF 30.00 PER SHARE
                         (Title of Class of Securities)

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                                Not Applicable*
                      (CUSIP Number of Class of Securities)

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                                James A. Ralston
                Executive Vice President and Chief Legal Officer
                              Smith & Nephew, Inc.
                                1450 Brooks Road
                            Memphis, Tennessee 38116
                                 (901) 396-2121

                     (Name, address and telephone number of
                      person authorized to receive notices
                 and communications on behalf of filing persons)

                                    Copy to:

                                    Pran Jha
                           Sidley Austin Brown & Wood
                                 Bank One Plaza
                            10 South Dearborn Street
                             Chicago, Illinois 60603
                           Telephone: (312) 853-7000


Check the appropriate boxes below to designate any transactions to which the
statement relates:

         [X]      third-party tender offer subject to Rule 14d-1.
         [_]      issuer tender offer subject to Rule 13e-4.
         [_]      going-private transaction subject to Rule 13e-3.
         [_]      amendment to Schedule 13D under Rule 13d-2.

Check the following box if the filing is a final amendment reporting the results
of the tender offer: [_]

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* There is no CUSIP Number assigned to the registered shares. CUSIP No.
152005104 has been assigned to the American Depositary shares of Centerpulse
Ltd. that are quoted on the New York Stock Exchange under the symbol "CEP."
CUSIP No. 152005203 has been assigned to the American Depositary Shares of
Centerpulse Ltd. that were issued pursuant to a restricted ADR facility and are
not publicly traded.

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     This Amendment No. 6 (this "Amendment") amends and supplements the Tender
Offer Statement on Schedule TO filed by Smith & Nephew Group plc, a corporation
organized under the laws of England and Wales ("S&N Group"), and Smith & Nephew
plc, a corporation organized under the laws of England and Wales ("S&N"), on
April 25, 2003, as amended by Amendment No. 1, Amendment No. 2, Amendment No. 3,
Amendment No. 4 and Amendment No. 5 thereto (as amended, the "Schedule TO"),
relating to the third-party tender offer by S&N Group to exchange S&N Group
ordinary shares, 12 1/2 pence nominal value per share (including S&N Group
shares represented by S&N Group American Depositary Shares ("ADSs"), each
representing 10 S&N Group shares), and cash for registered shares, CHF 30 par
value per share, of Centerpulse Ltd., a Swiss public company ("Centerpulse"),
including Centerpulse shares represented by Centerpulse ADSs, each representing
one-tenth (1/10) of a Centerpulse share, upon the terms and subject to the
conditions set forth in the Preliminary Prospectus/Offer to Exchange dated April
25, 2003 (the "Offer to Exchange") and in the related Letter of Transmittal
(which, together with the Offer to Exchange, as supplemented or amended from
time to time, constitute the "Offer"). Capitalized terms used but not defined
herein have the meanings assigned to such terms in the Schedule TO.

Item 11. ADDITIONAL INFORMATION.

     Although S&N's press release, dated June 19, 2003 and attached hereto as
Exhibit (a)(23), states that under Swiss takeover legislation the Offer will
expire on August 27, 2003, S&N has been informed that the current timetable set
by the Swiss Takeover Board provides for expiration of the Offer on August 25,
2003.

Item 12. EXHIBITS.

     Item 12 of the Schedule TO is hereby amended by adding the following
exhibits thereto:

EXHIBIT NO.     DESCRIPTION
-----------     -----------
(a)(23)         Press release of S&N, dated June 19, 2003 (incorporated
                herein by reference to S&N Group's Rule 425 filing made with the
                Securities and Exchange Commission on June 19, 2003).

(a)(24)         Advertisement of S&N, dated June 19, 2003 (incorporated herein
                by reference to S&N Group's Rule 425 filing made with the
                Securities and Exchange Commission on June 19, 2003).

                                      -2-



                                    SIGNATURE

     After due inquiry and to the best of my knowledge and belief, I certify
that the information set forth in this statement is true, complete and correct.

                                     SMITH & NEPHEW GROUP PLC

                                     By:   /s/  James Ralston
                                          --------------------------------------
                                          Name: James Ralston
                                          Title: Authorized U.S. Representative

                                     SMITH & NEPHEW PLC

                                     By:   /s/  James Ralston
                                          --------------------------------------
                                          Name: James Ralston
                                          Title: Authorized U.S. Representative

Date: June 19, 2003

                                      -3-



                                  EXHIBIT INDEX

EXHIBIT NO.        DESCRIPTION
-----------        -----------
(a)(23)            Press release of S&N, dated June 19, 2003 (incorporated
                   herein by reference to S&N Group's Rule 425 filing made with
                   the Securities and Exchange Commission on June 19, 2003).

(a)(24)            Advertisement of S&N, dated June 19, 2003 (incorporated
                   herein by reference to S&N Group's Rule 425 filing made with
                   the Securities and Exchange Commission on June 19, 2003).