1. Methods After designs the trefoil flap in the prolabium, the displaced tissuce is replaced and the columnella is lengthened, the sill is raised by the application of the trefoil flap.
   方法前唇设计出三叶瓣后,先对移位的组织进行完全游离及复位,再将三叶瓣向鼻小柱方向掀起,延长鼻小柱及抬高鼻底。
2. The prolabium of complete BCL operated on with straight line suture method had muscle fibers proliferated from the lateral lips, but the fibers were sparse and also had ultra structure variations.
   用直线缝合法修复的完全性双侧唇裂的前唇部，有从侧唇增生的肌纤维，但稀少，超微结构亦有变异。

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