上颌后缩主要是指上颌后缩，下颌位置基本正常，前牙反牙合，后牙近中合。上颌后缩是由于乳磨牙早失，上颌骨发育不全，上前牙先天缺失或者侧切牙腭侧异位而造成前牙反牙合，后牙中性合或者近中合。至于腭裂造成的上颌后缩，则前后牙大都成反合，后牙近中合。
结论：唇裂修复术后会出现上颌后缩的生长发育畸形。
Conclusion: After cleft lip repair maxillary retrusion will happen.
患者均有严重的小下颌畸形并伴轻度的上颌后缩畸形，睡眠呼吸暂停指数AI＞5，且睡眠时血氧饱和度都有不同程度的降低。
All patients have severe retrognathia with slight maxillary retrognathia, and their apnea index (AI) was higher than 5 as well as with oxygen hyposaturation during sleep.
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