Artificial joints wherein the mating surfaces are both non-metallic, preferably plastic, even more preferably polyethylene and even more preferably ultra-high molecular weight polyethylene. Because neither of the bearing surfaces of the artificial joint are made of metal, there is a potential for greatly...http://www.google.es/patents/US20030208280?utm_source=gb-gplus-sharePatente US20030208280 - Wear resistant artificial joint
