上颌中切牙倒置埋伏阻生的临床矫治

Orthodontic treatment of inversely impacted central incisors in the maxillae

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 2 4～ 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 。

Objective:To investigate the method of orthodontic treatment of the 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.