自锁托槽与传统托槽矫治对牙弓形态影响的临床比较

Comparison of Self-ligating Bracket and Conventional Bracket on the Correction of Dental Arch

目的:比较自锁托槽与传统托槽对牙弓形态变化的影响,分析自锁托槽矫治牙列拥挤的临床效果。方法:选取在笔者所在科进行正畸矫治的患者80例,随机分为观察组和对照组各40例,观察组采用自锁托槽矫治,对照组采用传统金属托槽矫治,比较两组治疗前后牙弓形态的变化。结果:自锁托槽与传统托槽治疗可改善第一前磨牙宽度、第二前磨牙宽度、第一磨牙间宽度、前段弓长,治疗前后组内比较差异具有统计学意义(P<0.05);比较治疗后的改变量,观察组患者第二前磨牙宽度、中段弓长的改善效果优于对照组,差异具有统计学意义(P<0.05)。结论:自锁托槽矫治相对于传统金属托槽矫治改善牙弓形态更为明显,且操作时间短,使用舒适。

Objective：To evaluate changes in the dental arch and soft and hard tissue produced by the seif-ligating bracket and conventional bracket. Method：80 patients were selected and assigned randomly into 2 groups as observation group and control group.Each group contained 40 patients. Observation group received non-extraction treatment with a self-ligating bracket and control group with a conventional ]）racket. The measurements of intercanine and intermolar and interpremolar width and arch length of dentition were made on dental casts to investigate the changes associated with the correction. Result：There was significant increase in length of dental arch with self-ligating and conventional bracket after treatment （ P〈0.05 ） .And there were significant increase in second premolar width and middle arch length in observation group than control group （ P〈0.05 ） .Conclusion：Self-ligating bracket has better clinical effect, shorter operation time and more comfortable than conventional bracket.