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1、两种托槽临床脱落率的对比研究两种托槽临床脱落率的对比研究[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
2、槽;直丝托槽;脱落率[中图分类号1R783.5[文献标识码]A[文章编号]1008-6455(2010)08-1200-02Comparisonoftherateofbondfailurebetweenpatientstreatedwithself-ligatingbracketsandconventionalstraightwirebracketsLILi-guo,YUANDong-hui(DepartmentofStomatology,TheBethuneInternationPeaceHosp
3、ital,Shijiazhuang050082,Hebei,China)Abstract:0bjectiveTocomparetherateofbondfailurebetweenpatientstreatedwithself-ligatingbracketsandconventionalstraightwirebrackets・MethodsAtotalof120patientswereselected,ineluding74malesand66females・60casesweretreated
4、withself-ligatingbrackets,whiletheother60casesweretreatedwithconventionalstraightwirebrackets.Therateofbondfailureduring6monthswasrecorded.ResultsTheirewasnostatisticallysignificantdifferencebetweentherateofbondfailureofself-ligatingbracketsandconventi
5、onalstraightwirebrackets(P>0.05).Therateofbondfailurebetweenthefirstthreemonthswashigherthanthesecondthreemonths,therewasnostatisticallysignificantdifference(P>0.05).Posteriorteethhadhigherfailureratethananteriorteeth,madibularposteriorteethhadhigherfa
6、ilureratethanmaxillary,therewasstatisticallysignificantdifference(P<0.01).ConclusionThereisnosignificantdifferencebetweentherateofbondfailureoftwokindsofbrackets,anddifferentfailurerateatdifferentlocationandtime・Keywords:self-ligatingbracket;convention
7、alstraightwirebracket:therateofbondfailure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吋间,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:选取口求恩国际和平医院口腔科就诊患者120例(男
8、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,釉质发育止常,唇面釉质无翩坏,无固定止畸治疗史。1・2材料1.2.1徳国非凡公司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,此时牙面呈口垩色,取京津釉质粘结剂,等量AB两液调匀,涂布于牙面,将等量