TIBIAL KNEE COMPONENT WITH A MOBILE BEARING

摘要

An orthopaedic knee component for implanting within a proximal tibia include s a tibial tray with a proximal tibial plateau and a projection extending generally orthogonal to the tibial plateau. The tibial tray also includes a distally extending stem. A bearing is coupled with the tibial plateau and has an articular bearing surface for engagement with a femoral component. The bearing is rotationally movable between a first rotational limit and a secon d rotational limit about an axis extending generally orthogonal to the tibial plateau. The bearing ha s a backing surface engaging the tibial plateau which is sized and shaped such that the backing surface is substantially entirely supported by the tibial plateau at any position during rotational movement between the first rotation limit and the second rotational limit.