METHOD OF IMPLANTING EXTRAMEDULLARY FEMORAL HEAD-NECK PROSTHESIS

摘要

A method for implanting an extramedullary femoral headneck prosthesis (1) in the femur, the latter having a shaft (5) and a neck (7) at the upper end of the shaft (5) at the medial side of the femur, includes determining the axis of the medial trabecular stream, cutting the neck of the femur to form a seat on the femur neck, and drilling a bore through the shaft of the femur to extend from the neck of the femur down to the lateral side of the shaft along a line substantially parallel to the axis of the medial trabecular stream. A barrel (15) having an open end is inserted into the bore with the open end of the barrel (15) facing upwardly and secured in fixed position in the bore. A stem (27) of a ball assembly (25) is inserted coaxially into the barrel to bring a generally planar surface (37) of the ball assembly into congruent, face-to-face engagement with the planar surface (39) of the femur neck.