Management of instability and osteolysis after total hip arthroplasty.

William J. Hozack, MD: The radiographs demonstrate a dislocated total hip arthroplasty (THA) with extensive bone lysis on both the acetabular and femoral sides. Component fixation appears intact. Closed reduction is indicated in this case, as in virtually all cases of dislocation. A dislocated THA is painful for the patient and requires immediate attention. Furthermore, there are many instances of single dislocations related to an unusual patient position that, once reduced, may never occur again. In this patient, further treatment is required, so the closed reduction gives the surgeon time to more William J. Hozack, MD, Department of Orthopedics, Thomas Jefferson University Medical School, Rothman Institute Orthopedics, Philadelphia, Pennsylvania