The short-term effects and complications of resurfacing arthroplasty of the hip.

Abstract

Objective To evaluate the short-term effects and complications of resuffacing arthro-plasty of the hip (RSAH). Methods Twenty-six cases (32 hips) treated with RSAH were analyzed retro-spectively. There were 14 males and 12 females, with a mean age of 46.8 years (range, 30-62 years). Nine cases (11 hips) were diagnosed as developmental dysplasia of the hip, 7 cases (9 hips) as osteonecrosis of the femoral head, 3 cases (4 hips) as ankylosing spondylitis, 5 cases (6 hips) as rheumatoid arthritis, 1 case (1 hip) as osteoarthritis, 1 case (1 hip) as pigmented villonodular synovitis. All cases were checked by MR or CT scan for observing the structure of the acetabulum and femoral head, osteolysis, osteosclerosis as well as the location of necrosis. The X-ray film was performed before operation and after operation (1 month, 3 months and every 6 months) to check the prosthesis loosening, migration and heterotopic ossification. Harris hip score system was used to evaluate the clinical results. Results All cases were followed up 8 months to 4.3 years (average, 2.1 years). The follow-ups showed that Harris scale increased from (44.5±7.1) points pre-operatively to (94.3±5.2) points postoperatively, with 28 hips (87.5%) excellent, 4 hips (12.5%) good. Com-plications consisted of 1 hip femoral nerve injury, 2 cases (3 hips) heterotopic ossification, 2 hips Trendelen-burg gait, 2 hips snapping hip, 1 case deep venous thromboembolism in the lower extremities, 1 hip femoral neck narrowing. There were not femoral neck fracture, infection, dislocation, and prosthesis loosening during our follow-up. Conclusion The RSAH has a satisfactory short-term effect. Mastering the indications and accurate procedure of the operation may help to avoid the complications. Key words: Arthroplasty; replacement; hip; Postoperative complications; Treatment outcome