3B自锁托槽系统和传统直丝托槽系统在排齐与整平阶段上颌牙弓宽度的变化

COMPARISON OF MAXILLARY ARCH CHANGES DURING ALIGNMENT AND LEVELING WITH SELF-LIGATING AND TRADITIONAL BRACKETS

目的:评价3B自锁托槽系统和传统直丝托槽系统在排齐和整平牙列过程中上颌牙弓宽度的变化。方法:选取40例非拔牙的正畸患者,分别应用传统直丝托槽和3B自锁托槽,排齐和整平上颌牙列,在T1阶段和T2阶段(即应用0.018×0.025NiTi方丝排齐和整平结束时)分别制取患者上颌模型,然后选取尖牙牙尖间的宽度等测量标志点进行多项测量。结果:自锁托槽组与直丝托槽组牙弓宽度变化最显著的是前磨牙区,各自前后差异均有统计学意义(均P<0.05);自锁托槽组的牙弓变化量比直丝托槽组大,但差异无统计学意义(均P>0.05)。结论:对于非拔牙正畸的患者,应用3B自锁托槽和传统直丝托槽系统在排齐和整平牙列阶段,均可使上颌牙弓中后段宽度显著增大;自锁托槽组的牙弓变化量比直丝托槽组大,但优势不明显。

Objective：To evaluate the maxillary width change in alignment and leveling dentition process between the 3B self-ligating brackets system and traditional straight wire brackets system. Methods： Forty orthodontic patients were selected, the traditional straight wire brackets and 3B self-ligating brackets were applied for align and level upper dentition. In T1 and T2 stage （i. e. application 0. 018× 0. 025 inches NiTi square wire）, we made upper jaw models, and then selected index point to a number of measurement. Results： The most significant change of dental arch width between self-ligating brackets group and straight wire brackets group is premolar area, and the differences have statistical significance. The change in self-ligating brackets group is larger than that in straight wire brackets group, but the difference was not statistically significant. Conclusion： For the dental orthodontic patients, both 3B self-ligating brackets and traditional straight wire brackets system can wide the upper dental arch significantly in alignment and leveling stage the change in self-lig.ating brackets group is larger than that in straight wire brackets group, but the advantage of self-ligating brackets group is not obvious.