Patent ID: 7753960

Claim:
A joint prosthesis comprising a tibial tray, a tibial base, a coupler, a tibial articular member, and a femoral articular member, wherein: the tibial tray, the tibial base, the coupler and the tibial articular member define a common axis; the tibial tray comprises a stem protruding distally from a proximal surface, the proximal surface: sized and shaped to cover at least part of a cut proximal end of a tibia; and defining a bore therethrough; the tibial base comprises: a distal surface sized and shaped to interface with the proximal surface of the tibial tray; and a proximal surface sized and shaped to attach to the tibial articular member; the coupler comprises: a proximal portion that contacts the tibial base, holds the distal surface of the tibial base in contact with the proximal surface of the tibial tray, and permits rotation of the tibial base about the common axis with respect to the tibial tray; and a distal portion that is received in the tibial tray bore with a diametrical interference fit; the tibial articular member comprises: a distal surface so sized and shaped as to attach to the proximal surface of the tibial base and to permit the tibial articular member to rotate about the common axis with the tibial base; and a proximal surface sized and shaped to articulate with the femoral articular member; and the femoral articular member comprises: a distal surface sized and shaped to articulate with the proximal surface of the tibial articular member; and a proximal surface sized and shaped to replace at least part of a cut proximal end of a femur.