Ultimate tensile strength of tooth structures

dc.creatorGiannini, M
dc.creatorSoares, CJ
dc.creatorde Carvalho, RM
dc.date2004
dc.dateMAY
dc.date2014-11-15T11:13:26Z
dc.date2015-11-26T17:19:40Z
dc.date2014-11-15T11:13:26Z
dc.date2015-11-26T17:19:40Z
dc.date.accessioned2018-03-29T00:07:20Z
dc.date.available2018-03-29T00:07:20Z
dc.identifierDental Materials. Elsevier Sci Ltd, v. 20, n. 4, n. 322, n. 329, 2004.
dc.identifier0109-5641
dc.identifierWOS:000220938200003
dc.identifier10.1016/S0109-5641(03)00110-6
dc.identifierhttp://www.repositorio.unicamp.br/jspui/handle/REPOSIP/76885
dc.identifierhttp://www.repositorio.unicamp.br/handle/REPOSIP/76885
dc.identifierhttp://repositorio.unicamp.br/jspui/handle/REPOSIP/76885
dc.identifier.urihttp://repositorioslatinoamericanos.uchile.cl/handle/2250/1282956
dc.descriptionObjective. This study determined the ultimate tensile strength (UTS) of enamel (E), dentin (D) and dentin-enamel junction (DEJ) using the microtensile technique. It was hypothesized that the UTS of dental structures varies according to location and nature. Methods. Intact occlusal, enamel surfaces from extracted human third molars were etched with 37% phosphoric acid and bonded with a one-bottle adhesive system. The bonded occlusal surfaces received a resin composite build-up and teeth were serially, vertically sectioned into several 0.7 mm thick stabs. Each stab was then trimmed to a dumbbell-shaped specimen with irrigated diamond burs to reduce the cross-sectional area to approximately 0.5 mm(2) at E, D or DEJ. E was tested according to its prismatic orientation (parallel, EP; and transversally, ET) and D as function of depth (superficial, DS; middle, DM and deep, DD). Specimens were tested in tension in an Instron testing machine at 0.5 mm/min. Results were analyzed by one-way ANOVA and Duncan's Multiple Range test. Results. UTS mean values (N = 20) were, MPa (SD): DEJ, 46.9 (13.7)(b); EP, 42.1 (11.9)(b); ET, 11.5 (4.7)(d); DS, 61.6 (16.2)(a); DM, 48.7 (16.6)(b) and DD, 33.9 (7.9)(c). Enamel stressed transversally to its prismatic orientation was significantly weaker (p < 0.05). Dentin depth significantly affected its UTS (p < 0.05). DEJ presented UTS that was similar to EP and DM (p > 0.05). Significance. The UTS of dental structures varies according to its nature and location. (C) 2003 Academy of Dental Materials. Published by Elsevier Ltd. All rights reserved.
dc.description20
dc.description4
dc.description322
dc.description329
dc.languageen
dc.publisherElsevier Sci Ltd
dc.publisherOxford
dc.publisherInglaterra
dc.relationDental Materials
dc.relationDent. Mater.
dc.rightsfechado
dc.rightshttp://www.elsevier.com/about/open-access/open-access-policies/article-posting-policy
dc.sourceWeb of Science
dc.subjecttensile strength
dc.subjectenamel
dc.subjectdentin
dc.subjectdentin-enamel junction
dc.subjectDentin-enamel Junction
dc.subjectHuman Coronal Dentin
dc.subjectBond Strength
dc.subjectShear-strength
dc.subjectDentinoenamel Junction
dc.subjectDemineralized Human
dc.subjectBovine Dentin
dc.subjectOrientation
dc.subjectAdhesion
dc.subjectTubules
dc.titleUltimate tensile strength of tooth structures
dc.typeArtículos de revistas


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