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目的:观察发育性髋脱位手法复位后髋臼发育的变化,探讨髋臼发育不良的演变特点。方法:117例(161髋)平均7.4年追踪观察,采用连续 X 线片,观察髋臼指数、臼头指数、Sharp角、ACM 角、前倾角及髋臼硬化带的形态变化,同时对股骨头中心距离差进行了测定。结果:发育性髋脱位手法复位后髋臼随年龄增长逐渐恢复,以复位后1年最为明显,复位后3年趋于平稳。髋臼发育不良者,复位前髋臼指数为39°以上,复位后髋臼指数恢复缓慢,经3～4年观察仍持续在30°左右。随复位年限的增加,股骨头中心距离差有逐渐减小的趋势。结论:复位前髋臼指数超过39°,复位后3年髋臼指数仍持续于30°,即可诊断为髋臼发育不良。
OBJECTIVE: To observe the changes of acetabulum development after the development of dislocation of hip in order to discuss the evolvement characteristics of acetabular dysplasia. Methods: A total of 117 patients (161 hips) were followed up for an average of 7.4 years. Continuous X-ray films were used to observe the changes of acetabular index, acetabular index, Sharp angle, ACM angle, anteversion angle and acetabular stiffening band. Center distance difference was measured. Results: After dislocation of the developmental hip, the acetabulum gradually recovered with age, and was most obvious at 1 year after the reduction, and stabilized 3 years after the reduction. Acetabular dysplasia, before the reset acetabular index was 39 ° or more, the index of recovery of the acetabular slow recovery after 3 to 4 years of observation still continued at about 30 °. With the increase of the resetting period, the distance between the femoral head centers gradually decreased. Conclusion: The index of acetabular acetabular is more than 39 ° before reset, and the index of acetabulum remains at 30 ° 3 years after reset, which can be diagnosed as acetabular dysplasia.