三种不同脱敏剂对牙本质小管封闭的扫描电镜观察

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1、质小管的封闭深度为10．49+2．15岬，经过刷牙实验后牙本质小管重新开放，无管塞物，仅在小管口周边部位残留少量封闭物。结论二日◆匕1、奥威尔有渗入牙本质小管内达到一定深度，与牙本质小管壁紧密结合，抗洗刷能力最强。2、极固宁脱敏剂作为临床常用的牙本质脱敏剂对牙本质小管的封闭疗效较佳，其抗洗刷能力较弱。3、自酸蚀粘结剂能达到封闭牙本质小管效果，但其抗洗刷能力最差。关键词牙本质过敏症；奥威尔；极固宁；自酸蚀粘结剂；扫描电镜2·英文论著摘要·Occlusiveeffectofthreedesensitizersondentinaltubule：anSEMinvestigati

2、onObjectiveDentinehypersensitivitywhichhasahilghmorbidityisacommonmouthdisease．Varieddesensitizersandmethodsareusedtotreatdentinehypersensitivityclinically．Thisstudyinvestigatedtheabilitytoenclosethedentinalmbfleandresistwashingoffrequentlyuseddesensitizersbyusmgscanningelectronmicroscop

3、e(SEM)，whichprovidesomereferencefordesensitizersselectiontoclinicalapplication．MaterialsandMethods42f-reshpremolarswereselectedforsensitivedentinemodelspreparingaccordingtothemethodwhichintroducedbyMordan．6specimenwererandomlyselectedasblankcontrolgroup(Deionizedwater)，othersweredividedi

4、nto3experimentalgroups，Oravivegroup，Greenorgroupandself-etchgroup，12specimenineachgrouprespectively．Allspecimeninexperimentalgroupswerecleanedandetched，desensitizersofOmvive，Greenorandself-etchadhensivewereappliedaccordingtot．heirinstruction．6specimenwererandomlyselectedfromeachgroupandk

5、eptinphysiologicalsalinefor24hours，followingthesurfacesofspecimenwerescrubedwithsofttoothbrushestwiceeverydayfor4weeks．3specimenofscmbedandun·scmbedinallgroupsweresplitedopenincenter．SEMWasusedtoobservetheclosingsituationofdentinaltubuleandpenetrationdepthofthepaste．AstatisticalanalysisW

6、asperformedusi．ngtheSPSS13．0software诵tllone—wayANOVAandindependentsamplert-testatasignificancelevelofO．05．3Results1．Oravive，Greenorandself-etchadhensivehavethefunctiontoenclosedentinaltubule．OraviveCallcompletelyenclosedentinaltubulesandinfiltratedintodentinaltubules鹊deep弱27．344-1．70m'n．

7、Itcouldkeepclosingdentinaltubuleaftertoothbrushinganditsclosingdepthwas27．25±1．331mLNosi嘶ficantdifferenceWasobservedcomparedtothedepthbeforetoothbrushing．2．OreenorWasabletoenclosedentinaltubules，butthosetubulesopenedaftertoothbrushing．ThereWasStatisticallySignificantdiffe