ABSTRACT
Hip resurfacing arthroplasty has gained popularity as an alternative to Total hip arthroplasty (THA) in younger patients due to preservation of the femoral bone stock, improved hip stability and proprioception, and a lower risk for leg length discrepancy. Computer-assisted navigation allows for accurate reconstruction of the femoral bone and optimal fixation of the femoral component. Most surgeons use intraoperative alignment jigs to place the acetabular component referencing of the position of the patient on the operating table. Following advances in 3D sensor technology, it became possible to develop computer navigation systems that use optical or magnetic sensors to determine and track the position of bones, surgical instruments and implants. Navigation of the acetabular cup in hip resurfacing follows an identical procedure to THA. Reliance on imageless computer navigation systems on the anterior pelvic plane has been touted as a potentially inaccurate method for determining pelvic position due to registration errors and its lack of accounting for pelvic tilt.
