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1、Influenceofdifferentendodonticfilling>materialsonrootfracturesusceptibilityFernandoC.Ribeiro3,AlineEvangelistaSouza-Gabriel5,MelissaA.Marchesan-,EdsonAlfredo~,YaraT.CorreaSilva-Sousa"1andManoelD.Sousa-Neto^*回’旦"SchoolofDentistry,UniversityofRibeiraoProto,RibeiraoPrcto
2、,SP,BrazilhRibeiraoPretoSchoolofDentistry,UniversityofSaoPaulo,RibeiraoPreto,SP,Brazi1Received16August2007;revised16October2007;accepted17October2007.Availableonline28November2007.AbstractObjectiveToevaluatctheinfluenceofdifferentendodonticmaterialsonrootfracturcsusce
3、ptibility.MethodsSeventy-twomandibularincisorsweresectioned1mmbelowthecementoenameljunctiontoobtainrootsof12inmlength.RootsweresubmittedtochemomechanicalpreparationwiththerotaryinstrumentsofProfilesystem.Theobturationofrootcanalswereperformedwiththefollowingilling>mat
4、erials(刀=12):GT,unfi1ledteeth(control);GII,Endofill+gutta-percha;GUI,Sealer26+gutta-percha;GIV,AHPlus+gutta-percha;GV,Epiphany+gutta-percha;GVI,Epiphany+Resilon.Afterthesealerssettingtime,eachrootwasembeddedinacrylicrcsin.Thespecimenswerethensubmittedtofracturcresista
5、ncetestusinganInstrontesting◄machine^at1mm/min>ResultsTheANOVAtestshowednosignificeintsteitisticaldifference(p>.05)amongGT(162.16±41.4N),GTT(168.46±37.5N),GTTT(164.83±35.7N),GIV(168.29±38.7N),GV(172.36±20.6N)andGVI(193.11±42.8N).ConclusionThecorematerials(gutta-percha
6、orResilon)combinedwiththetestedendodonticsealersarenotabletoincreasetherootfractureresistaneeincanalssubmittedtochemomechanicalpreparation.Keywords:Endodontictreatment;Rootfracture;SealersArticleOutline1.Introduction2.Materialsandmethods3.Results4.Discussion5.Conclusi
7、onReferencesLIntroductionTeethwithrootcanaltreatmentseemsbemoresusceptibletoverticalfracturethanthosewithintactpulps.and—Thistypeoffracturehasanunfavorableprognosisandoftenleadstotoothextraction•旦方同四Rootfracturescanbederivedfromdentaltissueremovalduringcanalinstrument
8、ationmnd斗preparationofintraradicularpostspacedintracanalmedicationformorethan30days2andexcessivepressureduringrootobturation
