不同牙本质清洁剂对牙本质与自粘接树脂水门汀粘接强度的影响.docx

不同牙本质清洁剂对牙本质与自粘接树脂水门汀粘接强度的影响[摘要]目的评价乙二胺四乙酸（EDTA）和次氯酸钠（NaClO）对自粘接树脂水门汀与牙本质间粘接强度的影响。方法选择新鲜无龋、无裂纹的人离体前磨牙27颗去除颊侧釉质暴露浅层牙本质随机分为对照组（A组）、EDTA组（B组）和NaClO组（C组）。分别选用蒸馏水、3%EDTA溶液和1%NaClO溶液处理牙本质表面后与自粘接树脂水门汀RelyXUnicem进行粘接将其中24个试件置于37℃生理盐水中浸泡24h后测定剪切强度采用SPSS17.0统计学软件对数据进行统计分析在扫描电镜（SEM）和体视显微镜下分别观察粘接界面及断裂模式。结果A组与B组的剪切强度分别为（8.55±0.63）MPa和（8.47±0.56）MPa二者间差异无统计学意义（P>0.05）；C组的剪切强度为（12.97±0.59）MPa与A组和B组间差异均有统计学意义（P[关键词]乙二胺四乙酸；次氯酸钠；自粘接树脂水门汀；剪切强度[中图分类号]R783.1[文献标志码]A[doi]10.7518/hxkq.2015.03.019[Abstract]ObjectiveThisstudyaimstoevaluatethebondstrengthofaself-adhesiveresincementtodentinbyethylene-diaminetetraaceticacid（EDTA）andNaClO.MethodsTwenty-sevenfreshlyextractednon-carioushumanpremolarswerepreparedtoexposethebuccaldentinandrandomlydividedintothreegroups：controlgroup（Agroup）EDTAgroup（Bgroup）andNaClOgroup（Cgroup）.Allteethwerebondedtodentinusingaself-adhesiveresincementaftertheteethintheAgroupwereprocessedwithdistilledwater.TheBandCgroupwereprocessedwith3%EDTAand1%NaClOrespectively.After24hoursat37℃watertheshearbondstrengthsofthetwenty-fourspecimensweremeasured.AllstatisticalanalysiswasperformedusingSPSS17.0softwarepackage.Eachfracturedspecimenwasexaminedunderdentalmicroscope.Threenewspecimenswerecutandthemorphologiesofthecement-dentininterfacewereobservedunderscanningelectronmicroscope（SEM）.ResultsTheshearbondstrengthintheAgroupBgroupandCgroupwas（8.55±0.63）（8.47±0.56）and（12.97±0.59）MParespectively.ThedifferencebetweenAgroupandBgroupwasnostatisticallysignificant（P>0.05）whereasthedifferencebetweenCgroupandBgroup（orAgroup）wasstatisticallysignificant（P[Keywords]ethylenediaminetetraaceticacid；NaClO；self-adhesiveresincement；shearbondstrength临床上全冠修复体连同粘接材料一起脱落、基牙表面发生继发龋或基牙与修复体之间产生微渗漏等现象时有发生除了粘接材料的粘接性能及操作者的粘接技术等因素之外基牙表面玷污层的影响也是不