Please use this identifier to cite or link to this item: http://repositorio.unitau.br/jspui/handle/20.500.11874/1427
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dc.contributor.authorGobbo, Vanessa Cavallipt_BR
dc.contributor.authorRosa, Denise Aparecida dapt_BR
dc.contributor.authorSilva, Daylana Pacheco dapt_BR
dc.contributor.authorKury, Matheuspt_BR
dc.contributor.authorLiporoni, Priscila Christiane Suzypt_BR
dc.contributor.authorSoares, Luis Eduardo S.pt_BR
dc.contributor.authorMartins, Airton Abraãopt_BR
dc.date.accessioned2019-09-11T20:51:38Z-
dc.date.available2019-09-11T20:51:38Z-
dc.date.issued2018-
dc.citation.volume26pt_BR
dc.citation.spagee20170589-
dc.identifier.doi10.1590/1678-7757-2017-0589pt_BR
dc.identifier.issn1678-7765-
dc.identifier.urihttp://repositorio.unitau.br/jspui/handle/20.500.11874/1427-
dc.description.abstractAbstract High concentrations of hydrogen peroxide can cause adverse effects on composition and structure of teeth. However, the addition of calcium and fluoride in bleaching agents may reduce enamel demineralization. Objective: To evaluate chemical changes of sound and demineralized enamels submitted to high concentrations of hydrogen peroxide containing fluoride (F) or calcium (Ca). Material and Methods: Enamel blocks of bovine incisors with standard dimensions were obtained and half of them were submitted to pH-cycling to promote initial enamel caries lesions. Sound and demineralized enamel samples were divided into (n=10): (C) Control (no whitening treatment); (HP) 35% hydrogen peroxide; and two experimental groups: (HPF) 35% HP+0.2% F and (HPC) 35% HP+0.2% Ca. Experimental groups were submitted to two in-office bleaching sessions and agents were applied 3 times for 15 min to each session. The control group was kept in remineralizing solution at 37°C during the bleaching treatment. The surface mineral content of sound and demineralized enamels was determined through Fourier Transform Raman spectroscopy (FT-Raman), Energy dispersive Micro X-ray fluorescence spectroscopy (μ-EDXRF); and the subsurface, through cross-sectional microhardness (CSMH). In addition, polarized light microscopy (PLM) images of enamel subsurface were observed. Results: According to three-way (FT-Raman and μ-EDXRF analyses) or two-way analysis of variance (ANOVA) (CSMH) and Tukey test (α=5%), the calcium or fluoride added to high-concentrated bleaching agents increased phosphate and carbonate concentrations on sound and demineralized enamels (p<0.05). However, HPC and HPF were unable to completely reverse the subsurface mineral loss promoted by bleaching on sound and demineralized enamels. The calcium/ phosphate (Ca/P) ratio of sound enamel decreased after HP treatment (p<0.001). Conclusion: Even though experimental bleaching agents with Ca or F reduced mineral loss for both sound and demineralized enamel surfaces, these agents were unable to reverse the enamel subsurface demineralization.en
dc.description.provenanceMade available in DSpace on 2019-09-11T20:51:38Z (GMT). No. of bitstreams: 0 Previous issue date: 2018en
dc.languageInglêspt_BR
dc.publisherFaculdade De Odontologia De Bauru - USP-
dc.relation.ispartofJournal of Applied Oral Science-
dc.rightsAcesso Abertopt_BR
dc.rights.urihttps://creativecommons.org/licenses/by-nc-nd/4.0*
dc.sourceScielopt_BR
dc.subject.otherTooth bleachingen
dc.subject.otherHydrogen peroxideen
dc.subject.otherFluoridesen
dc.subject.otherTooth remineralizationen
dc.titleEffects of experimental bleaching agents on the mineral content of sound and demineralized enamelsen
dc.typeArtigo de Periódicopt_BR
dc.contributor.orcidLiporoni, Priscila Christiane Suzy https://orcid.org/0000-0001-6787-1167pt_BR
dc.contributor.orcidda Silva, Daylana https://orcid.org/0000-0002-1690-6451pt_BR
dc.contributor.orcidCavalli, Vanessa https://orcid.org/0000-0002-9459-1926pt_BR
dc.contributor.researcheridCavalli, Vanessa/J-1187-2014pt_BR
dc.description.affiliation[Soares, Luis Eduardo S.] Universidade do Vale do Paraíba, Brazil-
dc.description.affiliationMartins, Airton Abraão] Universidade Federal do Piauí, Brazil-
dc.description.affiliationCavalli, Vanessa; Silva, Daylana Pacheco da; Kury, Matheus] Universidade Estadual de Campinas, Brazil-
dc.description.affiliationRosa, Denise Aparecida da] Consultório particular, Brasil-
dc.description.affiliationLiporoni, Priscila C. S.] Universidade de Taubaté, Brazil-
dc.subject.researchareaDentistry, Oral Surgery & Medicineen
dc.subject.scieloareaDentistry, Oral Surgery & Medicineen
dc.identifier.scieloSCIELO:S1678-77572018000100497-
Appears in Collections:Artigos de Periódicos

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