Importance

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Abstract

An apparatus for use in total knee arthroplasty includes a tibia engaging plate which is coupled to an upstanding rack member, a drill bushing bracket coupled to the rack member by a lockable pinion member, and a femoral positioning jig which is rotatably coupled to the drill bushing bracket. The drill bushing bracket has a pair of spaced apart drill bushings which are dimensionally located to correspond in position to medial and lateral condyles of the femur. The centers of the drill bushings lie in a plane which is parallel to the plane in which the tibia engaging plate lies. The femoral positioning jig is provided with a pair of posterior skids, one for the lateral posterior condyle and one for the medial posterior condyle, a pair of holes for attaching the jig to the resected distal femur with spikes, and a pair of holes for receiving the two drill bushings. Two different femoral positioning jigs are provided, one for the right knee and one for the left knee. In both jigs, the hole for receiving the medial drill bushing is circular and the hole for receiving the lateral drill bushing is oblong or kidney shaped. This allows the positioning jig (and the femur) to rotate about the axis of the medial drill bushing. The positioning jigs are also each provided with angular indicia adjacent the lateral oblong hole and the drill bushing bracket is provided with left and right indicia indicating the axial center of each drill bushing.

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