Abstract
Objective: In joint replacement surgery for young patients, it is important to preserve the bone stock for future revision surgery. We performed 118 total hip arthroplasties (THAs), using the Mayo conservative hip prosthesis since March 2003. The purpose of this study was to evaluate the short-term results of THAs using the Mayo conservative hip prosthesis for young patients with osteonecrosis of the femoral head who were aged less than 40 years old?
Methods: From March 2003 to September 2008 inclusive, we performed 29 THAs on 25 patients under 40 years old. The average age at surgery was 33 years and the average observation period was 38.5 months. Clinical and radiographic evaluations were performed for all the cases.
Results: Japanese Orthopedic Association (JOA) score improved from 50 to 95 points, respectively There were no loosening or dislocations identified. In one patient with alcoholism, stem subsidence of 2 mm was observed, but it was not progressive. In 93% of the cases, spot welds were found until 8 months after surgery in such a high proportion of patients.
Conclusion: From the results of this study, it appeared that short-term results, when using the Mayo conservative hip prosthesis for young patients with osteonecrosis of the femoral head, were satisfactory.
