POSTERIOR STABILIZED ORTHOPAEDIC KNEE PROSTHESIS HAVING CONTROLLED CONDYLAR CURVATURE

摘要

To provide an orthopaedic knee prosthesis.SOLUTION: An orthopaedic knee prosthesis is provided, including: a femoral component including condyles having condyle surfaces curved in the sagittal plane; and a tibial bearing including a platform having a bearing surface configured to articulate with the condyle surface of the femoral component. The condyle surface of the femoral component contacts the bearing surface at first to third contact points on the respective condyle surfaces at first to third degrees of flexion. The condyle surface (i) has first to third radiuses of curvature in the respective sagittal planes at the first to third contact points, and (ii) has a first curved surface section defined between the first contact point and the second contact point, the first curved surface section having a non-constant radius of curvature. A second radius of curvature is different from a first radius of curvature and a third radius of curvature is different from the first radius of curvature and the second radius of curvature, and the third radius of curvature is smaller than the second radius of curvature.SELECTED DRAWING: Figure 18