Objective:Analyze the difference of maxillary growth after cleft palate operation between earlier period and later period.

目的：分析腭裂手术早晚是否会对患者上颌骨发育造成不同的影响。

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The relationship between modified incision of cleft palate operation and post-operation velopharyngeal insufficiency(VPI);

目的探讨腭裂手术切口设计的改良对术后腭咽闭合不全的影响。

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Objective: This study analysed the cause of cleft relapse after cleft palate operation and researched the preventive method.

前言： 目的：分析腭裂术后复裂的原因，探讨预防复裂的方法。

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