Drill jig for a femoral prosthesis

Claim 1

A jig for preparing the femur to receive a hip prosthesis, said prosthesis having a shank which includes a platform formed at one end to which head means is connected, said shank having a hole therethrough, said jig comprising means removably insertable into the shaft of said femur, said insert means being substantially sized and shaped like the platform and at least a portion of the remainder of the shank of said prosthesis and having a tool guide bore therethrough, and including grip means for inserting said insert means into said femoral shaft so that said guide bore will be positioned in the femur at substantially the same location as said hole in the prosthesis when the prosthesis is fitted for use with its shank extending into said femoral shaft, a guide part spaced from said insert means and having a tool guide bore therethrough, means rigidly connecting said guide part to said insert means for operation as a unit and for spacing said guide part from said insert means so as to enable said guide part to be positioned outwardly of the femur when said insert means is positioned in said femoral shaft, said guide bore in the guide part and insert means being aligned to accommodate a work tool means for forming a securement means receiving a hole in said femur when said insert means is positioned in said femoral shaft, said securement means receiving hole being aligned with said hole in said prosthesis shank when said prosthesis is fitted for use with said shank extending into the femoral shaft.