Femoral component sizing and positioning in hip resurfacing arthroplasty.

Hip resurfacing arthroplasty is now being done on a regular basis with excellent short-term results. Although the technologic improvements are important in achieving improved clinical results, surgical technique and implant positioning are also critical. To minimize the risk of impingement and preserve acetabular bone stock during hip resurfacing arthroplasty, it is important for orthopaedic surgeons to be familiar with the current principles of femoral component sizing and positioning.