Effective tooth-bleaching protocols capable of reducing H2O2 diffusion through enamel and dentine

dc.contributor.authorSoares, Diana G. [UNESP]
dc.contributor.authorBasso, Fernanda G.
dc.contributor.authorPontes, Elaine C. V. [UNESP]
dc.contributor.authorGarcia, Lucas da F. R. [UNESP]
dc.contributor.authorHebling, Josimeri [UNESP]
dc.contributor.authorSouza Costa, Carlos A. de [UNESP]
dc.contributor.institutionUniversidade Estadual Paulista (Unesp)
dc.contributor.institutionUniversidade Estadual de Campinas (UNICAMP)
dc.date.accessioned2014-12-03T13:10:49Z
dc.date.available2014-12-03T13:10:49Z
dc.date.issued2014-03-01
dc.description.abstractObjectives: To evaluate the effects of experimental protocols on bleaching effectiveness and hydrogen peroxide (HP) diffusion through enamel and dentine.Methods: Enamel/dentine discs were subjected to six bleaching sessions, consisting of 1 or 3 applications of 17.5% or 35%-HP gel for 5/15 min, or 37% carbamide peroxide (CP) gel for 10/20 min. Discs undergoing the regular protocol (35%-HP; 3 x 15 min) constituted the positive control group. Colour change (Delta E) was assessed (CIE L*a*b* system) after each session. HP diffusion was quantified (sessions 1, 3, and 6) in enamel/dentine discs adapted to artificial pulp chambers. Data were analysed by Pillai's Trace and Bonferroni test, or by one-way ANOVA and SNK/Tamhane's test (alpha = 5%).Results: All tooth-bleaching protocols significantly increased the Delta E values. A reduction in HP diffusion and no significant difference in Delta E compared with the positive control were observed for the following bleaching protocols: 17.5%-HP 3 x 15 min, at the 4th session; and 35%-HP 1 x 15 and 3 x 5 min, at the 5th session. HP diffusion in the 37%-CP 3 x 20 min bleaching protocol was statistically similar to that in the positive control. The other experimental bleaching protocols significantly decreased HP diffusion through enamel/dentine discs, but the Delta E values were statistically lower than those observed in the positive control, in all sessions.Conclusion: Shortening the contact time of a 35%-HP gel or reducing its concentration produces gradual tooth colour change and reduced HP diffusion through enamel and dentine.Clinical significance: A reduction in HP concentration, from 35% to 17.5%, in a bleaching gel or shortening its application time on enamel provides a significant tooth-bleaching improvement associated with decreased HP diffusion across hard dental tissues. Therefore, these protocols may be an interesting alternative to be tested in the clinical situation. (C) 2013 Elsevier Ltd. All rights reserved.en
dc.description.affiliationUniv Estadual Paulista, Dept Dent Mat & Prosthodont, Araraquara Sch Dent, BR-14801903 Araraquara, SP, Brazil
dc.description.affiliationUniv Estadual Campinas, UNICAMP, Piracicaba Dent Sch, Dept Oral Diag, Piracicaba, SP, Brazil
dc.description.affiliationUniv Estadual Paulista, Dept Physiol & Pathol, Araraquara Sch Dent, BR-14801903 Araraquara, SP, Brazil
dc.description.affiliationUniv Estadual Paulista, Dept Orthodont & Pediat Dent, Araraquara Sch Dent, BR-14801903 Araraquara, SP, Brazil
dc.description.affiliationUnespUniv Estadual Paulista, Dept Dent Mat & Prosthodont, Araraquara Sch Dent, BR-14801903 Araraquara, SP, Brazil
dc.description.affiliationUnespUniv Estadual Paulista, Dept Physiol & Pathol, Araraquara Sch Dent, BR-14801903 Araraquara, SP, Brazil
dc.description.affiliationUnespUniv Estadual Paulista, Dept Orthodont & Pediat Dent, Araraquara Sch Dent, BR-14801903 Araraquara, SP, Brazil
dc.description.sponsorshipFundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)
dc.description.sponsorshipConselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)
dc.description.sponsorshipIdFAPESP: 11/12938-8
dc.description.sponsorshipIdFAPESP: 11/09385-7
dc.description.sponsorshipIdCNPq: 301029/2010-1
dc.format.extent351-358
dc.identifierhttp://dx.doi.org/10.1016/j.jdent.2013.09.001
dc.identifier.citationJournal Of Dentistry. Oxford: Elsevier Sci Ltd, v. 42, n. 3, p. 351-358, 2014.
dc.identifier.doi10.1016/j.jdent.2013.09.001
dc.identifier.issn0300-5712
dc.identifier.lattes4517484241515548
dc.identifier.urihttp://hdl.handle.net/11449/112553
dc.identifier.wosWOS:000332414000016
dc.language.isoeng
dc.publisherElsevier B.V.
dc.relation.ispartofJournal of Dentistry
dc.relation.ispartofjcr3.770
dc.relation.ispartofsjr1,919
dc.rights.accessRightsAcesso restrito
dc.sourceWeb of Science
dc.subjectTooth bleachingen
dc.subjectHydrogen peroxideen
dc.subjectEnamelen
dc.subjectDentineen
dc.titleEffective tooth-bleaching protocols capable of reducing H2O2 diffusion through enamel and dentineen
dc.typeArtigo
dcterms.licensehttp://www.elsevier.com/about/open-access/open-access-policies/article-posting-policy
dcterms.rightsHolderElsevier B.V.
unesp.author.lattes4517484241515548[6]
unesp.author.orcid0000-0002-7455-6867[6]
unesp.campusUniversidade Estadual Paulista (Unesp), Faculdade de Odontologia, Araraquarapt

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