A prosthetic tibial component for a prosthetic total knee joint includes two constructs, one being a metal base that engages a bone and the other being a polyethylene bearing that attaches to the metal base and articulates with a femoral prosthetic component on a opposing side of the joint. The metal...http://www.google.co.uk/patents/US7189262?utm_source=gb-gplus-sharePatent US7189262 - Bimetal tibial component construct for knee joint prosthesis
