Patent ID: 7070623
Filing Date: 2006-07-04
Classification: A61F,A61L,C23C

Abstract:
1. A prosthesis for implantation in a patient, comprising: (a) a prosthesis body formed of zirconium or zirconium alloy comprising an implant portion for inserting into the body tissue of the patient, at least a part of said zirconium or zirconium alloy having a single phase crystalline structure; (b) a bearing surface comprising at least one condyle on the prosthesis body; (c) a tibial component formed of an organic polymer or polymer based composite and adapted to cooperate with the bearing surface; and (d) a coating of blue-black or black oxidized zirconium of uniform thickness directly on the bearing surface of the condyle for reducing wear of the organic polymer or polymer-based composite component prepared by the process comprising the steps of altering the surface roughness of said zirconium or zirconium alloy having a single phase crystalline structure and uniform composition and subsequently oxidizing said zirconium or zirconium alloy.