上颌中切牙倒置埋伏阻生的临床矫治

摘要

目的：探讨上颌中切牙倒置埋伏阻生的矫治方法。方法：对11例倒置埋伏阻生的上中切牙(2例含牙囊肿)，先行手术开窗显露牙冠，然后在“U”型保护罩的支持下用活动或固定正畸技术进行矫治。结果：活动矫正器经24～30个月，固定矫正器8～12个月使倒置埋伏阻生牙进入牙弓排齐。结论：倒置埋伏阻生的上颌中切牙，通过手术和正畸技术，完全能排入正常牙列，不需拔除。%Objective:To investigate the method of orthodontic treatment ofthe inversely impacted central incisors in the maxillae.Methods:Surgical exposures were made in 11 cases of the inversely impacted upper central incisors(2 with denta lyst).Treatments were performed under the protection of “U”.Results:The invensely impacted teeth were aligned after using moving appliance for 24～30 months,and fixed appliance for 8～12 months.Conclusions:The inversely impacted central incisors in the maxillae could be aligned by orthodontic operation.The teeth need not be extracted.