摘要：目的 分析比较下颌牙列拥挤的自锁托槽非拔牙矫治牙列排齐前后牙齿变化的情况。方法 选择下颌牙列拥挤非拔牙矫治患者各15例，随机分配至Damon自锁托槽与3M MBT传统结扎托槽组。对治疗前、牙列排齐后的研究模型、头颅定位侧位片进行测量分析。结果 牙列排齐后，Damon自锁托槽组与MBT组矫治后的下前牙唇倾度及双尖牙宽度均较治疗前增大，差异有统计学意义(P<0.05)；两组矫治前后各项测量指标差值比较，差异均无统计学意义(P>0.05)。结论 对于下牙列拥挤患者的非拔牙矫治，Damon自鎖托槽矫治发生类似MBT传统结扎托槽相同的牙齿变化，主要为前牙的唇向倾斜移动以及双尖牙段的宽度增加。

    关键词：牙列拥挤；自锁托槽矫治器；非拔牙治疗

    Abstract：Objective To analyze the dental change of self-ligating appliance for non-extraction patients with crowding of mandibular arch.Methods 15 cases were treat with Damon3 self- ligating brackets and 15 cases were treat with conventional 3M MBT brackets. The cephalometric films and model were taken and measured before and after treatment.Results Compared with the incisor inclination and premolar width before treatment ......