Zimmer Holdings Offer and ORTHOsoft Directors' Circular Mailed to Shareholders


WARSAW, Ind. and MONTREAL, Sept. 7 -- Zimmer Holdings, Inc. (NYSE:ZMH), a leader in the orthopaedics industry, and ORTHOsoft Inc. (TSX-Venture: OSH), a leader in computer navigation for orthopaedic surgery, announced that Zimmer's indirect wholly owned subsidiary, ZMH Acquisition Co., has mailed today its offer and circular to ORTHOsoft shareholders in connection with Zimmer's previously announced takeover bid for all of ORTHOsoft's outstanding common shares in a cash transaction for CDN$1.10 per common share (the "Offer"). The ORTHOsoft Directors' Circular was also mailed with the Offer.

The Offer is open for acceptance until 6:00 p.m. (Eastern time) on October 15, 2007, unless withdrawn or extended, and is subject to customary closing conditions including, among other things, that the number of ORTHOsoft common shares being validly deposited under the Offer and not withdrawn, upon expiration of the Offer, constitute, together with any common shares directly or indirectly held by ZMH Acquisition Co. and its affiliates, at least 66-2/3% of the common shares calculated on a fully diluted basis and more than 50% of the common shares calculated on a fully diluted basis, the votes attached to which would be included in the minority approval of a second-step business combination.

ORTHOsoft shareholders are advised to read the Offer, the Directors' Circular and related documents, which have been filed with the Canadian securities regulatory authorities, as they contain important information. ORTHOsoft shareholders may obtain a copy of these materials at www.sedar.com.

About Zimmer
Founded in 1927 and headquartered in Warsaw, Indiana, Zimmer is the worldwide #1 pure-play orthopaedic leader in designing, developing, manufacturing and marketing reconstructive and spinal implants, trauma and related orthopaedic surgical products. Zimmer has operations in more than 24 countries around the world and sells products in more than 100 countries. Zimmer's 2006 sales were approximately $3.5 billion. The Company is supported by the efforts of more than 7,000 employees worldwide.

Visit Zimmer on the worldwide web at www.zimmer.com

About ORTHOsoft
ORTHOsoft develops and markets best-in-class medical software, instruments and computerized systems designed to help orthopaedic surgeons increase accuracy in hip, knee and spine implant surgery. ORTHOsoft's FDA-approved patented software solutions are developed by surgeons for surgeons, resulting in intuitive and easy-to-use navigation that tracks surgical flow and provides surgeons with real-time data, thus helping to improve the surgical process and patient outcomes. ORTHOsoft's 2006 revenues were approximately CDN$12.7 million.

Visit ORTHOsoft on the worldwide web at www.orthosoft.ca

Source: Zimmer Holdings, Inc.

CONTACT: Media, Brad Bishop, +1-574-372-4291,
bradley.bishop@zimmer.com,

Web site: www.zimmer.com/
http://www.orthosoft.ca/

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