3M自锁托槽与直丝弓托槽在正畸治疗过程中应用的比较

3M self-locking bracket versus straight wire bracket during orthodontic treatment

背景:自锁托槽矫治器的出现改变了传统的结扎方式,显著提升了矫治过程中牙齿的滑动机制及扩弓效果,有效降低了摩擦力。目的:探讨3M自锁托槽和传统直丝弓托槽在正畸治疗过程中的应用效果差异。方法:纳入轻、中度拥挤的安氏一类错牙合畸形矫治患者796例,其中男398例,女400例,年龄11-19岁,398例患者选择采用3M Smart ClipTM自锁托槽矫正器治疗,为观察组;另398例选择奥杰MBT直丝弓托槽矫正器治疗。比较两组磨牙间宽度、尖牙间宽度、上前牙凸度及矫正疗程。结果与结论:两组矫治后的前磨牙间宽度、上前牙凸度显著优于矫治前(P<0.05),并且观察组矫治效果明显优于对照组(P<0.05);两组组内治疗前后的第一磨牙宽度、尖牙间宽度等比较差异无显著性意义,两组之间比较差异也无显著性意义。观察组牙列排齐时间与总治疗疗程均少于对照组(P<0.05)。表明与传统的MBT直丝弓托槽矫正器相比,3M自锁托槽矫正器扩弓效果明显,可降低临床矫治拔牙比率,缩短矫正疗程。

BACKGROUND： Self-locking brackets changed the traditional ligation mode and obviously elevated the sliding mechanism of the teeth and the effect of its spreading during orthodontic treatment, and effectively decreased friction force. OBJECTIVE： To explore the differences of the application of 3M self-locking bracket and traditional straight wire bracket during orthodontic treatment. METHODS： A total of 796 patients receiving orthodontic correction of mild and moderate misaligned teeth, including 398 males and 400 females, at the age of 11-19 years old. 398 patients received 3M Smart ClipTM self-ligating bracket braces as observation group. The remaining 398 patients received MBT straight wire appliance. The width of molars, intercanine width, superior anterior tooth convexity and correction were compared between the two groups. RESULTS AND CONCLUSION： The width of premolars and superior anterior tooth convexity were significantly better after correction than that before correction in both groups（P〈0.05）. Moreover, the correction outcomes were significantly better in the observation group than in the control group（P〈0.05）. No significant difference in the width of first molar and intercanine width was detected before and after treatment in either group, as well as between the two groups. Aligned dentition time and the total therapeutic duration were shorter in the observation group than in the control group（P〈0.05）. These findings indicate that compared with the traditional MBT straight wire bracket braces, expansion arch effect of the 3M Smart Clip TM self-ligating bracket braces is obvious; clinical treatment can reduce the rate of extraction cases, and shorten the course of correction.