Femoral extension prosthetic component and tibial shelf prosthetic component for unicondylar meniscal bearing knee prosthesis and prosthesis including such a component

Abstract

A femoral extension prosthetic component for use in a unicondylar meniscal bearing unicompartmental knee replacement is described. The femoral component comprises a securing element and a bearing surface, the securing element adapted to abut and be connected to a distal end of a femur bone, and the bearing surface adapted to abut a meniscal bearing. The femoral component includes an entrapment portion adapted to extend beyond the meniscal bearing. Tibial components and meniscal bearings are also described, as well as methods of using such components.

1 . A tibial shelf prosthetic component for use in a unicondylar meniscal bearing unicompartmental knee replacement, the tibial component comprising a shelf having a connection surface and a convex bearing surface, the connection surface adapted to abut and be connected to a proximal end of a tibia bone, the convex bearing surface adapted to abut a concave face of a meniscal bearing, the tibial shelf including an inner wall extending from the perimeter of the bearing surface over a portion of the inner side, the inner wall having an outwardly facing side adjacent to the bearing surface, wherein the outwardly facing side is inclined to an axis of the tibial component.