TRANSVERSE SUBTROCHANTERIC SHORTENING OSTEOTOMY IN PRIMARY TOTAL HIP ARTHROPLASTY FOR PATIENTS WIT SEVERE HIP DEVELOPMENTAL DYSPLASIA

Abstract

Twenty-Six total hip arthroplasties were performed in Crowe grade 3 or 4 hip dysplasia using subtrochanteric shortening osteotomy with 2-kinds of femoral stem(Primary monoblock and modular femoral stem). The average age was 46.2 years, and the average follow-up was 4.1 years. Acetabular reconstruction with structural autograft was used in 13 hips. Radiologically, hip centers were nearly normalized by vertical height of 10.6mm elevation and horizontal lengths of 1.7mm compared with uninvolved sites. Three of four osteotomy nonunions were managed with bone graft and other one wating for surgery. One acetabular revision was performed for migration. One postoperative dislocation was managed successfully with closed reduction and abduction brace. One patient (> 7cm) showed postoperative neurologic complications was noted. Harris hip score was improved from 35.6 to 81.7. A cementless modular distal fluted femoral stem is a useful device in these patients.