Patent ID: 6258126
Filing Date: 2001-07-10
Classification: A61F

Abstract:
A joint prosthesis system, comprising:a femoral component having medial and lateral articulation surfaces;a first prosthesis member having a superior surface and an inferior bone contacting surface;a cushion member mounted upon the superior surface of the first prosthesis member, the cushion member being formed of an elastomeric material and having an inferior surface and an opposed superior surface; anda second prosthesis member separate from, and movable with respect to the first prosthesis member, the second prosthesis member comprising a bicondylar bearing member having an inferior, cushion contacting surface mounted upon the superior surface of the cushion member and an opposed superior substantially rigid articulation surface having medial and lateral articulation surfaces;wherein the second prosthesis member is unconnected to, but in contact with the femoral component such that the femoral component maintains an articulating relationship with the second prosthesis member medial and lateral articulation surfaces; andwherein the second prosthesis member moves in response to varus/valgus malalignment conditions of up to at least 3.degree. so as to maintain contact between the second prosthesis member and the femoral component at both the medial and lateral articulation surfaces.