Objective To analyze the mid-term clinical and radiographic results obtained with the Bernese periacetabular osteotomy for the treatment of severe hip dysplasia. Methods From October 1997 to December 2002 20 hips of 18 patients were classified as having severe acetabular dysplasia (Severin classification Grade Ⅳb). Preoperatively, all patients had hip pain, and sufficient hip joint congruency on functional radiographs. All 20 hips underwent Bernese periacetabular osteotomy. Postoperatively, the hips were assessed radiographically on center edge angle (CE), acetabular roof obliquity and the progression of osteoarthritis. Clinical results and hip function were measured with the Harris hip score at an average of 6.2 years follow-up. Results Comparison of preoperative and follow-up radiographs demonstrated significant improvements in the lateral CE angle, the anterior CE angle, and roof obliquity. The average Harris hip score improved from 78.5 points preoperatively to 91.1 points at the time of the latest follow-up. Fourteen of 18 patients were satisfied with the result of the surgery, and 16 of 20 hips had a good or excellent clinical result. Undercorrection occurred in 5 hips. Conclusions The Bernese periacetabular osteotomy is an effective procedure for surgical correction of the severe dysplastic hip. This osteotomy can predictably obtain major reorientation of the acetabulum in all planes. The clinical results in the mid-term follow-up are encouraging.%目的 研究和分析使用伯尔尼髋臼周围截骨术治疗严重髋臼发育不良的中期临床和影像学结果.方法 1997年10月至2002年12月对18例(20髋)严重髋臼发育不良(Severin分级Ⅳb级)的患者接受了伯尔尼髋臼周围截骨术.患者手术时平均年龄21岁,平均随访时间6.2年.本组患者术前患髋均已出现疼痛,术前功能位片显示关节面吻合.术后影像学评价畸形的矫正范围,截骨处的愈合情况及关节炎的进展.临床结果和髋关节功能由Harris评分进行评价,术前Harris评分平均78.5分.结果 比较术前和术后X线片,外侧中心边缘角(CE角)、前方CE角和臼顶倾斜角均有显著改善.所有髂骨截骨均愈合.患者术后末次随访Harris评分平均91.1分.18例患者中的14例对手术效果表示满意.20髋中16髋临床结果优.但有5髋存在畸形矫正不足.结论 伯尔尼髋臼周围截骨术是治疗严重髋臼发育不良的有效术式.这一截骨术可以在各个平面对严重的骨缺损进行矫正,中期临床结果令人满意.
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