Primary total hip arthroplasty using the modular S-ROM prosthesis for the treatment of severe developmental dysplasia of the hip / 中国矫形外科杂志

ABSTRACT

[Objective]To research short-term results of primary total hip arthroplasty using the cementless modular S-ROM prosthesis for the treatment of severe developmental dysplasia of the hip.[Method]Eighten patients(19 hips) with severe developmental dysplasia of the hip underwent primary total hip arthroplasty using the S-ROM prosthesis.Of the patients,6 were male and 12 were female.The average age was 32 years.According to the Crowe classification system,there were 11 hips in type Ⅲ and 8 hips in type Ⅳ.The acetabulums were deepened at the level of the true acetabulum.The S-ROM modular stems were used on the femoral side.Subtrochanteric shortening osteotomy was performed when it was difficult to reset.The Harris hip score(HHS) and radiography were used to evaluate the hip function preoperatively and at the follow-up.[Result]One proximal femur tissure fracture occurred,and was bundled up with circle wire.There were 2 postoperative sciatic nerve irritation,which disappeared completely within 3 months.All patients were available for follow-up.There was one heterotopic ossification above greater trochanter.But the mobility of the hip was normal.There was no loosening or infection during the follow-up.Average follow-up period was(2.8) years(range,6 months-5 years).The HHS increased from 38.4 preoperatively to 85.2 at the time of final follow-up.[Conclusion]S-ROM is a perfect choice for the teatment of severe developmental dysplasia of the hip.Short-time clinical results were excellent.