根管封闭剂iroot+sp根尖封闭性能的分析

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1、关键词iRootSP；根管充填；根管封闭剂；微渗漏；单核充填技术●英文论著摘要StudyonapicalsealingabilityofiRootSProotcanalsealerObjectiveToaevaluatetheapicalsealingabilityoftworootcanalsealersbyobturatingrootcanals、航mContinuouswavecondensationtechniqueandsingleconeobturationtechnique．1．Materials：Materialsa

2、ndMethodsOnehundredextractedhumananteriorteeth、衍thasinglecanalwereselected．2．Methods：TherootcanalswereinstrumentedusingProtapertoF2，dividedrandomlyintofourexperimentgroups(twentyteethinanygroup)，inadditiontopositiveandnegativecontrolgroup(tenteethinanygroup)．GroupA：The

3、rootcanalswereobturated、ⅣitlliRootSP诹tllContinuouswavecondensationtechnique(n=20)．GroupB：Therootcanalswereobturated、析t11AHplus、柝t11Continuouswavecondensationtechnique(n=20)．GroupC：Therootcanalswereobturated、析miRootSP、析thSingleconeobturationtechnique(n=20)．GroupD：Theroo

4、tcanalswereobturatedwithAHplus、析也Singleconeobturationtechnique(n=20)．Accesscavitiesofallrootcanalwerobturateedwithcompositeresin．Thequalityofobturationonfourexperimentalgroup’SsamplewerecheckoutbyX—ray．ThewholetoothsurfaceevenlycoatednailpolishtwotimesforgroupF，except4

5、fortheapicalforamen2mmgroupA，B，C、DandE．Theapicalmicroleakagewasevaluatedbydyepenewationmethod．Afterdividingthesamplealongthelongaxistomesio-distallydirection，dyepenetrantlengthWasmeasuredbyStereoMicroscope．Thestatisticaldatawasanalyzedbymeansofspssl3．0softwarepackage．T

6、-testoftwosampleWasusedtoanalyzelineardyepenetration．MeandepthofleakagegroupsWasindicated、析tllx：￡-s．ThereWasstatisticaldifferencewhenP

7、valueoftheexperimentalgroupBWasgreaterthangroupA，butthereWasnotstatisticaldifferencebetweenthebothgroups妒>0．05)．2．Whenobturatingrootcanals埘mSingleconeobtruationtechnique，themeanvalueoftheexperimentalgroupDWaSgreaterthangroupC，butthereWasnotstatisticaldifferencebetweent

8、hebothgroups(尸>O．05)．3．WhenobturatingrootcanalswithiRootSProotcanalsealer，themeanvalueoftheexperimentalgroupCwasgreat