 Minimally Invasive Surgery MIS is a new technology in the optimization of healthcare services. It has been developed to minimize damage to surrounding tissue during arthroplasty. by reducing the size of the incision. The possible benefit is dramatic reductions in length of stay LOS for total hip replacement THR patients 12. However, MIS development has led to modifications to existing instrumentation, prostheses and technique which may impact long-term survival of the implant 13. There has been little research investigating the effects of these changes on long-term patient outcomes following MIS surgery. The use of RSA will allow for better understanding of the early fixation of the implant and the potential for early failure due to aseptic loosening. 