Patent ID: 9427323
Filing Date: 2016-08-30
CPC Classification: A61F

Claim Text:
1. A knee prosthesis comprising: a femoral component for securement to a femur, the femoral component defining medial and lateral condyles and an intercondylar groove; and a tibial component for securement to a tibia, the tibial component having respective bearing surfaces shaped to engage with said condyles both when the knee, in use, is extended and also over a range of flexion; wherein the medial and lateral condyles are both part-helical in shape and the respective bearing surface for one of the condyles is correspondingly part-helical in at least a medio-lateral direction; and wherein the other bearing surface is incongruent with the other condyle in at least the antero-posterior direction so as to allow for antero-posterior movement of the femoral component relative to the bearing surfaces of the tibial component.