Patients who consent for enrollment in this study will have a standard pre-operative and post-operative AP pelvic x-ray, and leg length, offset measurements, and center of rotation measurements will be made from these two radiographs. In addition, intra-operative fluoroscopic radiographs will also be obtained. Validated questionnaire (Harris Hip Scores) will be administered pre-operatively, at 3 months, at one year, and at two years.