Patent ID: 7513912
Filing Date: 2009-04-07
Classification: A61B,A61F,A61L,C08L

Abstract:
1. A prosthetic tibial component for a prosthetic total knee joint, said component comprising two constructs, one comprising a metal base construct adapted to engage a bone and the other comprising a polyethylene bearing construct adapted to attach to said metal base construct and adapted to articulate with a prosthetic femoral component on an opposing side of the joint, wherein said metal base construct is composed of two different metals, a first of said metals being adapted to engage the bone surface and a second of said metals being adapted to engage said polyethylene bearing construct, with the first metal being selected so as to provide a superior bone-engaging face, and the second metal being selected so as to provide a superior polyethylene-engaging face; wherein said metal base construct comprises: a base plate having a first of the different metals on a first surface thereof for engagement with the tibia; a stem extending from the first surface and adapted to be embedded in the tibia; posts extending from the first surface of said base plate for connecting engagement with the tibia; and a connector disposed on a second surface of said base plate for connection to a complementary connector on the polyethylene bearing construct; wherein said first metal comprises a selected one of titanium, a titanium alloy, tantalum, a tantalum alloy; wherein said second metal comprises a selected one of CoCrMo, a cobalt based alloy, a stainless steel, and a zirconium based alloy; and