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Invibiosreg Dr. John Devine to Discuss Wear Performance of CFR PEEKOPTIMAreg...

The wear rates of bearing materials are an increasing concern in the orthopaedic implant market, especially as younger patients are becoming candidates for joint replacement surgery. As a result, on September 27, Dr. John Devine, Invibio's8217;s® Senior Product Development Scientist, will present the findings of the company's8217;s recent screening study of the wear properties of PEEK-OPTIMA® based materials at the European Society of Biomaterials's8217; 20th European Conference on Biomaterials in Nantes, France.



Invibio's8217;s research, which investigates wear rates of PEEK-OPTIMA and carbon fibre-reinforced (CFR) PEEK-OPTIMA polymers used in conjunction with BIOLOX® Forte and BIOLOX Delta ceramic counterfaces or polymeric counterfaces, indicates that orthopaedic implants developed with CFR PEEK-OPTIMA polymer may produce less wear compared to those implants developed using conventional UHWMPE-on-metal material combinations.



's8220;Although the lifespan on an implant is ultimately dependant on its design, the material combinations utilized play a significant role in its overall durability and longevity,'s8221; said Dr. Devine. 's8220;For patients, this wear research indicates that artificial joints developed with CFR PEEK-OPTIMA polymer could last longer than those developed with other materials, reducing the likelihood of revision or implant replacement surgery.'s8221;



Research indicates the combination of CFR PEEK-OPTIMA materials against ceramic counterfaces produced significantly lower wear factors than those of UHMWPE/metal wear couples (1.1 x 10-6 mm3N-1m-1). The lowest wear factor (0.153 x 10-6 mm3N-1m-1) was found for pitch-based CFR PEEK-OPTIMA bearing against BIOLOX Forte. CFR PEEK-OPTIMA also performs well in an all polymeric wear couple, demonstrating wear factors of 0.34 x 10-6 mm3N-1m-1 under identical conditions. It was also observed that in general the surface of the machined polymeric pin becomes smoother (Sa ≈ 0.1µm) and more negatively skewed during the test, without a significant breaking in period.



The 20th European Conference on Biomaterials is the annual meeting of the European Society of Biomaterials gathering front-line researchers, scientists, engineers, manufacturers, dentists and surgeons interested in the development of advanced biomedical materials. Information on the conference is available at http://www.esb2006.org/.



About Invibio

Invibio® is a global leader providing high performance biomaterials, advanced technical research and consultative solutions across a wide range of medical device applications. The company's8217;s innovative products include implantable-grade PEEK-OPTIMA® and ENDOLIGN's8482; polymers and medical-grade PEEK-CLASSIX's8482; polymer. Invibio'ss biomaterials are produced at its headquarters and manufacturing facility in the United Kingdom. Invibio is available on the Web at www.invibio.com.



For more Invibio information, press only:

Tracy Conger, HSR Business to Business, (513) 346-5557

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