Feasibility And Safety Study Of rhBMP-2/CPM For Hip Fractures

Inclusion Criteria: * Age 55 or older. * Acute fracture of the proximal femur: displaced femoral neck fracture or unstable intertrochanteric femur fracture. * Anatomic reduction (open or closed) and internal fixation within 48 hours following injury using any one of the following fixation constructs: 1) multiple parallel interfragmentary screws; 2) sliding hip screw and side plate fixation; or 3) cephalomedullary nail. Exclusion Criteria: * Concurrent fractures of the ipsilateral or contralateral lower extremity that would impede performance on functional assessments. * Previous arthroplasty of contralateral (unaffected) hip. * Planned procedure(s) to stimulate fracture healing after internal fixation of the fractured hip.