对３０例单侧发育性髋脱位（ＤＤＨ）患儿闭合复位前后髋关节Ｘ线片进行测量，以自身健侧股骨头中心距离（ＣＨＤＤ）和髋臼指数为对照进行比较分析。结果显示：患髋ＣＨＤＤ不超过５％者，闭合复位后２年，其优良率达９５％，而ＣＨＤＤ大于６％者，则６７％的髋脱位治疗效果欠佳；髋臼指数明显改善发生在闭合复位后３～６个月。这些发现对ＤＤＨ的保守治疗具有一定的指导意义。 Thirty patients with unilateral developmental hip dislocation (DDH) were measured before and after closed reduction of the hip joint radiographs, and their contralateral femoral head center distance (CHDD) and acetabular index as control were compared. The results showed that 67% of the patients with CHDD had a poor outcome when the CHDD was less than 5%, 95% after 2 years of closed reduction and more than 6% after CHD. The acetabular index was significantly improved Closed after reset 3 to 6 months. These findings on the conservative treatment of DDH has some guidance.