Apparatus for sizing a femoral component

Claim 1

A sizing and drilling assembly for determining the optimum size femoral component to couple to a resected distal end of a femur from a group of femoral components having various sizes and condyle thicknesses, the assembly comprising: a body portion including a flat contact surface for engaging the resected end of the femur; a plurality of feet coupled to a bottom surface of the body for engaging posterior femoral condyles to align the body portion with the resected distal end of the femur; a stylus assembly slidably coupled to the body portion, the stylus assembly including an arm extending away from the body portion and a stylus coupled to the arm, the stylus assembly being movable relative to said body portion until the stylus engages the anterior femoral cortex; means on the stylus assembly and body portion for indicating the size of femoral component corresponding to the resected femur based on the position of the stylus assembly relative to the body portion a plurality of drill bushings of various sizes; and means coupled to the stylus assembly for supporting a drill bushing selected from the plurality of drill bushings, said selected bushing corresponding to the size of the femoral component indicated by the indicating means.