System and method for aligning hip replacement prostheses

A position measurement system for use in a hip arthroplasty procedure, the position measurement system comprising:

• an acetabular liner component having an inner concave surface and an outer convex surface, wherein the acetabular liner component includes at least two magnetic sensors arranged in a spatially distributed manner and a wireless transceiver configured to transmit measured magnetic field data to a destination external to the acetabular liner component;
• a prosthetic femoral component comprising a femoral head component, wherein
• the femoral head component and the acetabular liner component are shaped such that a ball-and-socket joint is formed when the femoral head component comes into contact with the inner concave surface of the acetabular liner component,
• while the ball-and-socket joint is formed, and in at least some orientations of the femoral head component relative to the acetabular liner component, a contact point on an external surface of the femoral head component contacts the inner concave surface, and
• the femoral head component includes at least one permanent magnet;
• and
• a computer system comprising one or more processors and a memory, wherein the memory stores instructions that, when executed by the one or more processors, cause the computer system to:
• determine orientations of the femoral head component relative to the acetabular liner component substantially in real time at least by inputting the measured magnetic field data transmitted by the wireless transceiver, or data derived from the measured magnetic field data, to a trained neural network configured to output data indicative of the orientations of the femoral head component relative to the acetabular liner component,
• detect a dislocation of the femoral head component from the acetabular liner component based on the measured magnetic field data indicative of sensor readings captured by the at least two magnetic sensors, the measured magnetic field data being representative of the orientations of the femoral head component relative to the acetabular liner component, and
• output data indicative of whether the dislocation is due to implant impingement or bony impingement.