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目的评价Bioquick自锁矫治器矫治中度拥挤非拔牙病例临床应用效果。方法选取2009年7月至2013年2月于沈阳市口腔医院正畸科就诊的上颌牙列中度拥挤的非拔牙正畸患者28例，分为两组（每组14例）。分别应用Bioquick自锁托槽矫治器配合唇肌功能训练（Bioquick组）和MBT矫治器配合口外弓（MBT组）进行矫治，矫治前后拍摄患者头颅侧位x线片并进行头影测量分析，同时记录比较两组更换弓丝的时间。结果Bioquick组与MBT组矫治后的U6S-Y和U6-PP角测量值较矫治前均减小，差异有统计学意义（P〈0．05）；两组矫治前后各测量值差值比较，仅u6S-Y和u6-PP角的矫治前后差值具有统计学意义（P〈0．05）。Bioquick组更换弓丝时间为（49．72±10．34）S，MBT组为（238．5±25．29）s，两组差异有统计学意义（P〈0．05）。结论对于上颌牙列中度拥挤的非拔牙患者。Bioquick自锁托槽矫治器配合唇肌功能训练虽未能达到口外弓强支抗的作用效果，但仍能防止切牙的过度唇倾作用，可获得较好的面型。

Clinical treatment efficiency of Bioquick self-ligating brackets for the non-extraction patients with moderate crowding arch

Objective To evaluate the clinical treatment efficiency of Bioquick selfligating appliance for the nonex traction patients with moderate crowding arch. Methods Twentyeight nonextraction patients with moderate crowding arch were enrolled in this study. All of these patients were randomly divided into two groups. Fourteen patients from the Bioquick group were treated with Bioquick selfligating brackets and lip muscles training. Fourteen patients from the MBT group were treated with MBT brackets and facebow respectively. The cephalometric films were taken and mea sured immediately before and after treatment. The number of visits and the time of ligation and deligation were recorded and compared. Results The U6sY distance and the U6PP angle of each group were decreased. The difference was statistically significant （P 〈 0.05）. In the same way, the difference of U6sY distance and the U6PP angle between the measured values before and after was remarkably significant between two groups （P 〈 0.05）. The arch wire replacement time of Bioquick group was （49.72 ± 10.34）s, and the junction ligation time of MBT group was （238.5 ± 25.29）s, the dif ference being statistically significant （P 〈 0.05）. Conclusion For the nonextraction patients with moderate crowding arch, the Bioquick selfligating bracket systems with lip muscles training can not achieve the same effect of extraoral an chorage, but it can control the degree of anterior teeth obliquity and surface better.