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Company insight


Innovative biomaterials for joint prostheses


As one of the leaders in specialty chemicals, Evonik wants to extend the service life of joint prostheses with PEEK biomaterials for more quality of life for patients.


replacement, many of today’s veterinary treatment methods would not be conceivable at all without the underlying highly regulated human medicine. As a rule, veterinary medicine participates in the achievements of medical devices approved for humans by the FDA or the PMDA (Pharmaceuticals and Medical Devices Agency, Japan). The polymer experts from the speciality chemicals company Evonik want to see it the other way around. According to its idea, high-performance materials used in the treatment of hip dysplasia in dogs and cats should find their way into human medicine. The success of the innovative technology so far could prove them right.


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Innovative hip prostheses for pets The hip dysplasia treatment method of the Swiss company KYON is based on a novel cementless hip prosthesis. It was designed from a combination of several high-performance materials, each of which is capable of performing all its functions in the best possible way. “One of the weak points of hip prostheses has always been the tribology between the head and the cup. This is the crucial point where damage due to frictional losses accumulates in the form of wear particles with the millions of annual movement cycles of an active dog. The performance of the tribological


pair, therefore, significantly determines the lifespan of a hip prosthesis,” explains Dr Slobodan Tepic, founder of KYON. “In developing our system, we were always driven by the desire to permanently reduce the suffering of the animals. For us, this meant devising a hip prosthesis system that does not require any subsequent revision.” The result of over two decades of research and development


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hether internal fixation of bone fractures, treatment of cruciate rupture or total hip


The latest generation of cementless hip prostheses for permanent use on dogs and cats from the Swiss company KYON. At the heart of the innovative technology is a friction partner made of VESTAKEEP PEEK biomaterial from Evonik.


by KYON is the latest generation of cementless hip prostheses for permanent use. At the heart of the innovative technology is a friction partner, a so-called inlay, made of Evonik’s VESTAKEEP PEEK biomaterial with an additional carbon fibre- reinforced PEEK ring between the ceramic


head and the cup. “VESTAKEEP PEEK is a proven high-performance polymer for implants in human medicine offering outstanding tribological properties. Unpublished data suggests that linear wear is reduced by a factor of seven with ceramic on PEEK when compared with conventional pairing, which is why we have based our latest generation of hip prostheses on this material combination,” explains Guy C. Spörri, CEO of KYON. Approximately 6,000 successful hip replacement procedures without a single revision due to inlay wear and as many satisfied dogs – including true champions (agility dogs) – and five years of detailed documentation confirm the success of KYON’s hip prosthesis system relying on PEEK. The polymer experts from Evonik want to build on this success and are aiming to make it possible to use PEEK in human joint prostheses.


Medical Device Developments / www.nsmedicaldevices.com


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