A Clinical Trial of a Metal on Poly Component Versus CORAIL Stem: A Bone Mineral Density Study

The main goal is to prospectively evaluate bone mineral density adjacent to the femoral component and femoral bone remodeling of two different designs: CORAIL impaction broach titanium stem compared to a modular titanium femoral stem (Tri-lock). Patients will be randomized to one of the two treatment groups prior to surgery. Each patient will be evaluated at their regularly scheduled 10-14 days, 3, 6, 12 and 24 month visits following surgery. Patients will be asked to have bilateral DEXA bone mineral density tests (10-14 days post-surgery, and 6, 12 and 24 months post-operatively). Urine and serum samples (measures of bone turnover) will be collected at 3, 6 and 12 months post-operatively after an overnight fast. Patient reported questionnaires will be completed preoperatively and at the 3, 6, 12, and 24 month visits.