Revision total hip arthroplasty - Salvage procedures using bone allografts in Japan.

Total hip arthroplasty (THA) and hemiarthroplasty have improved hip joint function of patients suffering from hip disease or trauma with excellent clinical results and long-term survivorship. Conversely, there has been an increase in the number of revision surgeries after THA and hemiarthroplasty due to bone deficiency. The reconstruction of deficient bone remains a challenging problem following THA. While performing revision surgery, we have previously classified the preoperative bone deficiency using X-ray, CT and three-dimensional CT imaging according to location and severity of the deficiencies. We then predicted the shape and amount of the required bone allograft and the type of implant. Due to the accepted reconstruction methods of bone deficiency following revision surgeries, it is important to pre-operatively assess the site and size of the bone deficiency to be repaired in the revision THA (re-THA). Bone allograft makes it possible to repair massive bone deficiency, recover bone stock, and improve long-term implant stability. Performing bone allograft will require a bone bank for harvesting, treating, and storing bone in Japan.