Patients will be evaluated in clinic at 2 weeks, 3 months, one year, two year, five years and every 5 years afterwards. The leg length, offset and center of rotation will be measured on the pre and post-operative x-ray. Questionnaires based on validated clinical outcomes scores will be completed at the pre-operative visit, at 3 months, one year, two years, five years and every 5 years afterwards.