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dc.contributor.authorShemesh, H.-
dc.contributor.authorBier, C. A. S.-
dc.contributor.authorWu, M. -K.-
dc.contributor.authorTanomaru-Filho, M.-
dc.contributor.authorWesselink, P. R.-
dc.identifier.citationInternational Endodontic Journal. Malden: Wiley-blackwell Publishing, Inc, v. 42, n. 3, p. 208-213, 2009.-
dc.description.abstractTo evaluate ex vivo the incidence of defects in root dentine before and after root canal preparation and filling.Eighty extracted mandibular premolars were divided equally in four groups. Group 1 was left unprepared. All other root canals were prepared using Gates Glidden drills and System GT files up to size-40, 0.06 taper at the working length. Group 2 was not filled while the canals of the other groups were filled with gutta-percha and AH26, either with a master cone and passive insertion of secondary gutta percha points (group 3) or lateral compaction (group 4). Roots were then sectioned horizontally 3, 6, and 9 mm from the apex and observed under a microscope. The presence of dentinal defects (fractures, craze lines or incomplete cracks) was noted and the differences between the groups were analysed with the Fisher's exact test.No defects were observed in the roots with unprepared canals. The overall difference between the groups was significant (P < 0.05). Canal preparation alone created significantly more defects than unprepared canals (P < 0.05). The total number of defects after lateral compaction was significantly larger than after noncompaction canal filling.Root canal preparation and filling of extracted teeth created dentine defects such as fractures, craze lines and incomplete cracks.en
dc.description.sponsorshipCoordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)-
dc.publisherWiley-Blackwell Publishing, Inc-
dc.sourceWeb of Science-
dc.subjectcraze linesen
dc.subjectvertical root fractureen
dc.titleThe effects of canal preparation and filling on the incidence of dentinal defectsen
dc.contributor.institutionAcad Ctr Dent Amsterdam-
dc.contributor.institutionUniversidade Estadual Paulista (UNESP)-
dc.description.affiliationAcad Ctr Dent Amsterdam, Dept Cariol, NL-1066 EA Amsterdam, Netherlands-
dc.description.affiliationSão Paulo State Univ, UNESP, Araraquara Dent Sch, Dept Restorat Dent, Araraquara, SP, Brazil-
dc.description.affiliationUnespSão Paulo State Univ, UNESP, Araraquara Dent Sch, Dept Restorat Dent, Araraquara, SP, Brazil-
dc.description.sponsorshipIdCAPES: 2094/07-
dc.rights.accessRightsAcesso restrito-
dc.relation.ispartofInternational Endodontic Journal-
Appears in Collections:Artigos, TCCs, Teses e Dissertações da Unesp

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