Our current research includes the analysis of arthroplasty implants which are removed during revision total joint replacement surgery to determine the mechanisms of failure and methods to improve the longevity of joint replacements. We also conduct laboratory research in the area of biomechanics related to arthroplasty. Studies include the analysis of stability and fixation of cementless joint replacements, stress transfer of implants to bone, and the impact of joint replacement on the kinematics of the musculoskeletal system. Our clinical studies include analysis of outcomes after joint replacement, methods to improve joint function after arthroplasty, and studies of the etiology and treatment of osteonecrosis of the hip.