两种托槽临床脱落率的对比研究(1)
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[摘要]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。
[关键词]自锁托槽;直丝托槽;脱落率
[中图分类号]R783.5 [文献标识码]A[文章编号]1008-6455(2010)08-1200-02
Comparison of the rate of bond failure between patients treated with self-ligating brackets and conventional straight wire brackets
LI Li-guo,YUAN Dong-hui
(Department of Stomatology,The Bethune Internation Peace Hospital,Shijiazhuang 050082,Hebei,China)
Abstract:ObjectiveTo compare the rate of bond failure between patients treated with self-ligating brackets and conventional straight wire brackets.MethodsA 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.ResultsThere 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 wasstatistically significant difference(P<0.01).ConclusionThere is no significant difference between the rate of bond failure of two kinds of brackets, and different failure rate at different location and time.
Key words:self-ligating bracket;conventional straight wire bracket;the rate of bond failure
自锁托槽是一种新的托槽类型,可以通过托槽槽沟唇侧的滑盖或弹簧夹固定弓丝,简便了结扎过程,节省了椅旁操作时间,还有助于减小滑动阻力,减少关闭间隙的阻力,使矫治效率增加。在治疗过程中,若托槽发生脱落,复诊时重新粘结托槽会延长椅旁时间,使疗程延长。本研究通过比较自锁托槽与传统托槽在临床上的脱落率,分析托槽脱落的原因,为临床上自锁托槽的应用提供参考。
1资料和方法
1.1临床资料:选取白求恩国际和平医院口腔科就诊患者120例(男74例,女66例),年龄12.6～16.8岁,分为两组,60例使用自锁托槽矫治,设为A组,60例使用传统直丝托槽矫治,设为B组。选择标准:牙体完整,釉质发育正常,唇面釉质无龋坏,无固定正畸治疗史。
1.2材料
1.2.1 德国非凡公司Quick自锁托槽,国产金属网底直丝弓托槽,国产京津釉质粘合剂。
1.2.2 托槽的粘结方法:用开口器撑开上下唇,充分暴露操作区。常规清洁牙面,酸蚀60s,清水冲洗牙面并吹干,此时牙面呈白垩色,取京津釉质粘结剂,等量AB两液调匀,涂布于牙面,将等量AB两糊剂调匀,放置在托槽底部,托槽就位,去除多余粘结剂。
1.2.3 复查:从粘结托槽之日起,每次复诊时记录托槽脱落例数,脱落例数包括同一牙位脱落后再粘结、再次脱落的例数 ......
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