Results A two-year follow-up revealed there occurred butment caries,luxated butment,and overlain residual root gingivitis,even on the rise,while the alveolar ridge showed no uneven absorption.

结果基牙根龋、基牙松动、覆盖残根牙龈炎的发生随时间呈递增趋势,而牙槽嵴则无不均匀吸。

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术式的术后愈合良好,而腭侧舌形瓣术式的术后有9例分别出现瓣膜肿胀、穿孔及出血。