Abstract: A knee joint prosthesis is provided for implanting on the tibial plateau and femoral condyle of the knee. The prosthesis includes a tibial prosthesis having a tibial fixation surface on the tibial prosthesis adapted to be positioned on the tibial plateau. The tibial fixation surface has at least one tibial attachment means for securing the tibial prosthesis to the tibial plateau. It further includes a femoral prosthesis having a femoral fixation surface adapted to be positioned on the femoral condyle. The femoral fixation surface has at least one femoral attachment means for securing the femoral prosthesis to the femoral condyle. The prosthesis further includes a bearing member supported by the tibial prosthesis for engaging the femoral prosthesis in weight bearing relationships.

Abstract: A cannulated bone screw is illustrated that retains a knotted suture and which is anchored to bone. The cannulated bone screw comprises a biocompatible body having a proximal end and a distal end, and the body includes exterior screw threads for inserting and retaining the body into the bone. The body is cylindrical and has a passageway that extends axially therethrough. The passageway includes a central portion, a distal portion and a proximal portion. The central portion has a diameter less then the distal portion and is sized to receive a suture thread therethrough. The distal portion is sized to receive a suture thread knot. The suture thread knot received within the distal portion is retained by the central portion, which is sufficiently small to prevent the knot from being drawn therethrough. The proximal portion includes a hexagonal cavity for cooperating with an external drive tool for rotating the body and thereby driving the body into the bone.