The majority of patients on the Adult Reconstructive Surgery Service have primary or revision total joint replacements. Approximately 15% to 20% of the cases are undergoing revisions of failed total joints. Hip resurfacing arthroplasty is now offered as a non-traditional option for younger patients with hip disease. Non-prosthetic options for hip disorders include arthroscopy, surgical dislocation for impingement, and femoral or periacetabular osteotomy for dysplasia. A limited number of knee patients may require hemiarthroplasty, osteotomy, or fusion after failure of a total knee replacement.