Prosthesis for knee replacement.

摘要

A knee prosthesis includes a femoral component in which the condyles have a continuous contact surface for the tibial bearing surface and in which the sagittal radius is constant from posterior to a point more anterior than the distalmost point. The tibial bearing surface is shaped to have a curvature which corresponds closely with that of the femoral condylar surfaces. The tibial component includes a plastics meniscus component supported on a metal platform for sliding movement in the anterior-posterior direction and the mating surface between the meniscus and platform has a sagittal curvature which is larger than the sagittal radius of the femoral condyles.