In the light of different position, the mesiodens were extracted respectively by the technique of labial ladder-shaped flap, palate-tongue shaped flap or incision of alveolar ridge crest.

唇侧梯形瓣及牙槽嵴顶部切口后合良,侧舌形瓣后有9例分别出现瓣膜肿胀、穿孔及出血。