两种托槽临床脱落率的对比研究

Comparison of the rate of bond failure between patients treated with self-ligating brackets and conventional straight wire brackets

目的:比较自锁托槽与传统直丝托槽在矫治过程中的脱落率。方法:选择正畸患者120例(男74例,女66例),其中60例使用自锁托槽,60例使用传统直丝托槽,记录6个月内托槽脱落例数。结果:两种托槽脱落率无显著差异(P>0.05);1～3月托槽脱落率高于4～6个月,但没有统计学意义(P>0.05);后牙脱落率高于前牙,下后牙脱落率高于上后牙,有统计学意义(P<0.01)。结论:两种托槽脱落率相当,不同部位、时间托槽脱落率不同。

Objective To compare the rate of bond failure between patients treated with self-ligating brackets and conventional straight wire brackets.Methods A total of 120 patients were selected,including 74 males and 66 females.60 cases were treated with self-ligating brackets,while the other 60 cases were treated with conventional straight wire brackets.The rate of bond failure during 6 months was recorded.Results There was no statistically significant difference between the rate of bond failure of self-ligating brackets and conventional straight wire brackets（P〈0.05）.The rate of bond failure between the first three months was higher than the second three months,there was no statistically significant difference（P〉0.05）.Posterior teeth had higher failure rate than anterior teeth,madibular posterior teeth had higher failure rate than maxillary,there was statistically significant difference（P〈0.01）.Conclusion There is no significant difference between the rate of bond failure of two kinds of brackets,and different failure rate at different location and time.