同拔出残根、直接修复和冠延长术相比，正畸(牙合)向牵引是一种简单、经济、实用的方法，值得在临床上推广。
Compared with root extraction, the direct restoration, and the crown lengthening by surgical procedure, the forced eruption is a simple, economical and practical method in clinical.
摘要］目的： 研究比较应用链状皮圈或镍钛弓丝在埋伏牙的正畸牵引治疗中的临床效果。
Abstract: Objective The aim of the study was to compare orthodontic traction of impacted teeth, using chain rubber ring or Ni-Ti wire respectively.
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