Patent ID: 7918893
Filing Date: 2011-04-05
Classification: A61F

Abstract:
1. An orthopaedic prosthesis comprising: a tibial bearing having an upper bearing surface including an aperture defined therein; a hinge post including a base, a stem extending downwardly from the base and received in the aperture of the tibial bearing, a medial axle extending medially from the base, and a lateral axle extending laterally from the base; a first bushing having a first curved surface received on the medial axle and a second bushing having a second curved surface received on the lateral axle; a femoral component configured to be coupled to a surgically-prepared surface of the distal end of a femur, the femoral component having (i) an articulating surface including a pair of spaced apart condyles in contact with the upper bearing surface of the tibial tray, (ii) a medial sidewall extending from the articulating surface, (iii) a lateral sidewall extending from the articulating surface, (iv) a pair of curved sidewalls positioned between the lateral sidewall and the medial sidewall, and (v) an internal chamber defined by the medial sidewall, the lateral sidewall, and the pair of curved sidewalls, the internal chamber having an opening defined on the articulating surface, wherein (i) the medial axle, lateral axle, first bushing, and second bushing are received in the internal chamber, (ii) the pair of curved sidewalls receive the first curved surface of the first bushing and the second curved surface of the second bushing, and (iii) the femoral component is configured to rotate about an axis defined by the medial and lateral axles.