Department of Orthopaedics, Shanghai Ninth People's Hospital, Shanghai Key Laboratory of Orthopaedic Implant, Shanghai Jiao Tong University School of Medicine and Engineering Research Center of Digital Medicine, Ministry of Education, Shanghai, PR China.
J Arthroplasty. 2012 May;27(5):764-9. doi: 10.1016/j.arth.2011.08.021. Epub 2011 Oct 21.
The precise relationship between developmental dysplasia of the hip and dislocation among patients after total hip arthroplasty has not been well clarified. A total of 820 patients with developmental dysplasia of the hip who underwent total hip arthroplasty from January 2000 to December 2009 were categorized according to Crowe classification, and postoperative dislocation rates were analyzed among subgroups. The overall dislocation rate was 2.93%. No statistically significant differences in dislocation rates were observed between these with and without subtrochanteric osteotomy. Femoral head size was the only factor with significant difference between the dislocated and stable groups, especially when femoral head diameter increased from 28 to 32 mm. Of all dislocations, 69.6% were anterior dislocation, and the degree of cup anteversion and combined anteversion of anterior dislocators was higher than that of the posterior dislocators (P = .0082 and P = .001).
发育性髋关节发育不良患者全髋关节置换术后脱位的确切关系尚未明确。对 2000 年 1 月至 2009 年 12 月行全髋关节置换术的 820 例发育性髋关节发育不良患者进行 Crowe 分类，分析各亚组术后脱位率。总的脱位率为 2.93%。伴或不伴转子下截骨的患者之间，脱位率无统计学差异。股骨头大小是脱位组与稳定组之间唯一有显著差异的因素，特别是当股骨头直径从 28mm 增加到 32mm 时。所有脱位中，69.6%为前脱位，前脱位患者的杯倾斜角度和前脱位合并倾斜角度均高于后脱位患者（P =.0082 和 P =.001）。
