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目的：探讨伯尔尼髋臼周围截骨术( bernese periacetabular osteotomy，PAO )后并发耻骨下支应力性骨折的相关因素。方法回顾分析2010年4月至2012年10月，PAO 术后并发耻骨下支应力骨折17例(17髋)(骨折组)资料。17例均为女性，随访7～30个月，平均18.2个月。随机(随机表法)抽取同期行 PAO的22例(22髋)女性患者为对照组，随访8～29个月，平均16.8个月。对比两组患者年龄，体质量指数，术前和术后随访时 Harris 评分，测量手术前后髋关节外侧 CE 角、前方 CE 角和臼顶倾斜角，以及术后坐骨截骨及旋转情况。结果两组患者的年龄、体质量指数、术前和术后随访时 Harris 评分、外侧 CE 角、前方 CE 角和臼顶倾斜角等参数差异均无统计学意义。术后坐骨支截骨不充分：骨折组为(12)；对照组为( 2)，差异有统计学意义。两组术后前方 CE 角：骨折组为(36.40±11.81)；对照组为(35.68±11.37)，差异有统计学意义( P＝0.039)。骨折组术前、术后 Harris 评分差异无统计学意义。结论术中坐骨支截骨不充分，强行旋转髋臼致耻骨支应力集中，是导致 PAO 术后耻骨下支应力性骨折的重要因素。“,”Objective To analyze the stress fracture of the pubis inferior ramus in Bernese periacetabular osteotomy ( PAO ) and short term follow-up results. Methods From April 2010 to October 2012, data of 17 patients ( 17 hips, females ) were collected. The average follow-up was 18.2 months ( range: 7 - 30 months ). Meanwhile, 22 PAO patients ( 22 hips, females ) were randomly chosen and listed in the control group, whose average follow-up was 16.8 months ( range: 8 - 29 months ). The 2 groups were compared in age, body mass index ( BMI ), Harris score preoperatively and postoperatively, lateral CE angle preoperatively and postoperatively, anterior CE angle preoperatively and postoperatively, and Tonnis angle of the acetabular roof preoperatively and postoperatively. Results No significant differences existed in age, BMI, Harris score, lateral CE angle, anterior CE angle and Tonnis angle between the 2 groups preoperatively and postoperatively. 12 hips showed incomplete ischial osteotomy in the fracture group, but only 2 hips were found in the control group, showing statistically significant differences between the 2 groups. Anterior CE angle postoperatively: ( 36.40 ± 11.81 ) in the fracture group and ( 35.68 ± 11.37 ) in the control group with statistical significance ( P = 0.039 ). In the fracture group, no statistically significant differences exited in Harris scores preoperatively and postoperatively. Conclusions Ischial incomplete osteotomy in PAO can lead to stress fracture of the pubis inferior ramus, but does not influence clinical the results if the fracture heals.