Apparatus, system, and method for determining a position of a hip prosthesis in a bone of a patient

A method of performing an orthopaedic surgical procedure on a hip of a patient to implant a hip prosthesis having a femoral prosthesis and an acetabular cup, the method comprising:

• operating a computer system to (i) determine a boundary that defines a set of orientations of the acetabular cup, relative to an acetabulum of the patient, that are predicted to not result in edge loading of the acetabular cup by the femoral prosthesis based on a first mathematical model of contact points between a femoral head of the femoral prosthesis and a cup liner of the acetabular cup for each functional position of a set of different functional positions of the patient, using pelvic tilt measurements of the hip of the patient and a type and a size of the femoral prosthesis and the acetabular cup as inputs to the first mathematical model and (ii) display a graph of the boundary relative to a range of possible orientations for the acetabular cup relative to the acetabulum of the patient;
• selecting a planned orientation for the acetabular cup from the range of possible orientations while the graph of the boundary is displayed by the computer system;
• and
• implanting the acetabular cup in the acetabulum of the patient at the planned orientation.