For patients with chronic hip disease, the surgeon will perform a total hip arthoplasty in which the entire femoral head is removed, the interior of the femur is reamed, and a hip prosthesis is implanted to replace the removed femoral head. This removal is done without close dimensional control. It is up tothe surgeon to maintain control principally by "eye". As a result, the possibility of a misaligned foot, a short leg or other structural errors is ever present.

This project was designed to provide the design of a fixture that could provide dimensional control during the operation. By locating the cut of the femur head, locating its position with respect to the femur, replacing the prostheses ball in the same location laterally and lengthwise, potential problems can be minimized. The design was a clever idea that worked well in one cadaver operation.