Ultimate Tensile Strength Of Tooth Structures.

dc.creatorGiannini, Marcelo
dc.creatorSoares, Carlos José
dc.creatorde Carvalho, Ricardo Marins
dc.date2004-May
dc.date2015-11-27T12:58:47Z
dc.date2015-11-27T12:58:47Z
dc.date.accessioned2018-03-29T01:00:23Z
dc.date.available2018-03-29T01:00:23Z
dc.identifierDental Materials : Official Publication Of The Academy Of Dental Materials. v. 20, n. 4, p. 322-9, 2004-May.
dc.identifier0109-5641
dc.identifier10.1016/S0109-5641(03)00110-6
dc.identifierhttp://www.ncbi.nlm.nih.gov/pubmed/15019445
dc.identifierhttp://repositorio.unicamp.br/jspui/handle/REPOSIP/196147
dc.identifier15019445
dc.identifier.urihttp://repositorioslatinoamericanos.uchile.cl/handle/2250/1296380
dc.descriptionThis 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. 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 slabs. Each slab was then trimmed to a dumbbell-shaped specimen with irrigated diamond burs to reduce the cross-sectional area to approximately 0.5 mm2 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. 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) The UTS of dental structures varies according to its nature and location.
dc.description20
dc.description322-9
dc.languageeng
dc.relationDental Materials : Official Publication Of The Academy Of Dental Materials
dc.relationDent Mater
dc.rightsfechado
dc.rights
dc.sourcePubMed
dc.subjectAnalysis Of Variance
dc.subjectCrystallography
dc.subjectDental Enamel
dc.subjectDental Stress Analysis
dc.subjectDentin
dc.subjectHumans
dc.subjectMaterials Testing
dc.subjectMicroscopy, Electron, Scanning
dc.subjectMolar
dc.subjectStatistics, Nonparametric
dc.subjectTensile Strength
dc.subjectTooth Cervix
dc.titleUltimate Tensile Strength Of Tooth Structures.
dc.typeArtículos de revistas


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