目的：评价标准方丝弓配合高位J钩对正畸治疗中牙根吸收的影响。
PURPOSE: The purpose of this study was to evaluate the effect of high pull J hook headgear(HPHG) on root resorption of maxillary incisors during orthodontic treatment.
目的评价尖牙向后结扎应用于方丝弓矫治技术的临床疗效，并探讨其机制和使用方法。
Objective To evaluate the effect of canine laceback applied in edgewise appliance and to discuss the mechanism and application.
方法：利用方丝弓固定正畸术的矫治原理和矫治方法，应用于脱落牙的再植。
METHODS:The edgewise appliance orthodontic theory and method were applied in the replantation of dropped teeth.
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