Devices, systems and methods for monitoring hip replacements

A hip replacement prosthesis comprising:

• a femoral assembly comprising a femoral head having an opening and a femoral implant, the femoral implant comprising a femoral neck and a femoral shaft, where the femoral head and the femoral implant are separate pieces that are assembled together by a coupling of the femoral neck into the opening of the femoral head to form the femoral assembly;
• a plurality of sensors coupled to the femoral shaft;
• at least one head/neck sensor pair comprising a first contact sensor associated with the femoral head and a second contact sensor associated with the femoral neck and positioned within the opening of the femoral head and adjacent the first contact sensor associated with the femoral head, wherein the at least one head/neck sensor pair is configured to detect contact between the femoral neck and the femoral head;
• a two-piece acetabular component comprising an acetabular shell having an opening and an inner acetabular liner attached to the acetabular shell and configured to at least partially fit within the opening of the acetabular shell;
• and
• at least one shell/liner sensor pair comprising a first contact sensor associated with the acetabular shell and a second contact sensor associated with the inner acetabular liner and positioned within the opening of the acetabular shell and adjacent the first contact sensor associated with the acetabular shell, wherein the at least one shell/liner sensor pair is configured to detect contact between the acetabular shell and the inner acetabular liner.