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dc.contributor.CRUESPUniversidade Estadual de Campinaspt_BR
dc.typeArtigo de periódicopt_BR
dc.titleEffective tooth-bleaching protocols capable of reducing H2O2 diffusion through enamel and dentinept_BR
dc.contributor.authorSoares, DGpt_BR
dc.contributor.authorBasso, FGpt_BR
dc.contributor.authorPontes, ECVpt_BR
dc.contributor.authorGarcia, LDRpt_BR
dc.contributor.authorHebling, Jpt_BR
dc.contributor.authorCosta, CADSpt_BR
unicamp.authorSoares, Diana G. Pontes, Elaine C. V. Univ Estadual Paulista, Dept Dent Mat & Prosthodont, Araraquara Sch Dent, BR-14801903 Araraquara, SP, Brazilpt_BR
unicamp.authorBasso, Fernanda G. Univ Estadual Campinas, UNICAMP, Piracicaba Dent Sch, Dept Oral Diag, Piracicaba, SP, Brazilpt_BR
unicamp.authorGarcia, Lucas da F. R. de Souza Costa, Carlos A. Univ Estadual Paulista, Dept Physiol & Pathol, Araraquara Sch Dent, BR-14801903 Araraquara, SP, Brazilpt_BR
unicamp.authorHebling, Josimeri Univ Estadual Paulista, Dept Orthodont & Pediat Dent, Araraquara Sch Dent, BR-14801903 Araraquara, SP, Brazilpt_BR
dc.subjectTooth bleachingpt_BR
dc.subjectHydrogen peroxidept_BR
dc.subject.wosCarbamide Peroxidept_BR
dc.subject.wosColor Stabilitypt_BR
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
dc.relation.ispartofJournal Of Dentistrypt_BR
dc.relation.ispartofabbreviationJ. Dent.pt_BR
dc.publisherElsevier Sci Ltdpt_BR
dc.identifier.citationJournal Of Dentistry. Elsevier Sci Ltd, v. 42, n. 3, n. 351, n. 358, 2014.pt_BR
dc.sourceWeb of Sciencept_BR
dc.description.sponsorshipFundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)pt_BR
dc.description.sponsorshipConselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)pt_BR
dc.description.sponsorship1Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)pt_BR
dc.description.sponsorship1Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)pt_BR
dc.description.sponsordocumentnumberFAPESP [2011/12938-8, 2011/09385-7]pt
dc.description.sponsordocumentnumberCNPq [301029/2010-1]pt
dc.description.provenanceMade available in DSpace on 2014-07-30T17:07:50Z (GMT). No. of bitstreams: 0 Previous issue date: 2014en
dc.description.provenanceMade available in DSpace on 2015-11-26T16:48:54Z (GMT). No. of bitstreams: 0 Previous issue date: 2014en
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