MODULAR SHAPING AND TRIAL REDUCTION GUIDE FOR IMPLANTATION OF POSTERIOR-STABILIZED FEMORAL PROSTHESIS AND METHOD OF USING SAME

摘要

MODULAR SHAPING AND TRIAL REDUCTION GUIDE FOR IMPLANTATION OF POSTERIOR-STABILIZED FEMORAL PROSTHESIS AND METHOD OF USING SAME According to the invention, there is provided a trial implant (10) comprising a modular bracket (12) defining a structure having an internal surface adapted to be seated on the distal aspect (14) of a resected femur bone (16) and an external surface with a shape resembling the normal distal condyle of the femur. The bracket has an elongated central opening (18) appointed to expose the resected bone of the femur, including a pair of tracks (20) for guiding a first shaping tool (22) along a predetermined path for controlled shaping of a patellar groove in the bone exposed through the opening. An end mill guide (300) cooperates with the bracket (12) to receive a second shaping tool (304) to form a deep rececs for accommodating a posterior-stabilizing housing. After the recess is formed, the guide (300) is replaced with an insert (322) having a posterior-stabilizing housing which covers the opening of the bracket and articulates with a proximal aspect of the tibia during interoperative trial reduction of the knee joint. Removal of the bracket from the resected bone is unnecessary following the shaping steps prior to performing the trial reduction.