Impact of chemical agents for surface treatments on microhardness and flexural strength of root dentin

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dc.contributor.authorMarcelino, Ana Paula Marcheto
dc.contributor.authorBruniera, João Felipe
dc.contributor.authorRached-junior, Fuad Abi
dc.contributor.authorSilva, Silvio Rocha Corrêa da [UNESP]
dc.contributor.authorMessias, Danielle Cristine
dc.contributor.institutionUniversity of Ribeirão Preto School of Dentistry
dc.date.accessioned2015-08-06T16:14:45Z
dc.date.available2015-08-06T16:14:45Z
dc.date.issued2014
dc.description.abstractThis study assessed the cross-sectional Knoop microhardness and flexural strength of root dentin exposed to different surface treatments with chemical agents after biomechanical preparation. Root canals from human canines were biomechanically treated and divided into eight groups (n=10) to receive one of the following dentin treatments: I. Deionized water (control); II. 5.25% Sodium hypochlorite (NaOCl); III. NaOCl + 10% Sodium ascorbate (SA); IV. SA; V. 2% Chlorhexidine gel (CHX); VI. 37% Phosphoric acid gel (PA) + CHX; VII. PA; and VIII. PA + NaOCl. The roots were sectioned to obtain specimens that were evaluated for cross-sectional Knoop microhardness and flexural strength using a three-point bending test. ANOVA and Tukey’s test were performed. The microhardness in the control group was significantly higher (p < 0.05) than in the groups exposed to chemical agents, which in turn were statistically similar (p > 0.05) to each other. Regarding flexural strength, PA+NaOCl provided statistical higher values than PA+CHX and CHX. However, there was no significant difference between the control group and those groups subjected to surface treatment (p > 0.05). Dentin microhardness was reduced after exposure to NaOCl, CHX, PA, SA and their associations and the flexural strength of radicular dentin was not affected by the chemical agents.en
dc.description.affiliationUniversity of Ribeirão Preto School of Dentistry
dc.description.sponsorshipConselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)
dc.format.extent1-6
dc.identifierhttp://dx.doi.org/10.1590/1807-3107BOR-2014.vol28.0052
dc.identifier.citationBrazilian Oral Research. Sociedade Brasileira de Pesquisa Odontológica - SBPqO, v. 28, n. 1, p. 1-6, 2014.
dc.identifier.doi10.1590/1807-3107BOR-2014.vol28.0052
dc.identifier.fileS1806-83242014000100260.pdf
dc.identifier.issn1806-8324
dc.identifier.scieloS1806-83242014000100260
dc.identifier.urihttp://hdl.handle.net/11449/126186
dc.language.isoeng
dc.publisherSociedade Brasileira de Pesquisa Odontológica - SBPqO
dc.relation.ispartofBrazilian Oral Research
dc.rights.accessRightsAcesso aberto
dc.sourceSciELO
dc.subjectChemical Compoundsen
dc.subjectPhysical Propertiesen
dc.subjectDentinen
dc.titleImpact of chemical agents for surface treatments on microhardness and flexural strength of root dentinen
dc.typeArtigo
unesp.author.orcid0000-0002-0227-8896[4]

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