Effect of home-bleaching gels modified by calcium and/or fluoride and the application of nano-hydroxyapatite paste on in vitro enamel erosion susceptibility

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dc.contributor.authorSantos, Luciana Floriani Thives Freitas [UNESP]
dc.contributor.authorTorres, Carlos Rocha Gomes
dc.contributor.authorCaneppele, Taciana Marco Ferraz
dc.contributor.authorMagalhães, Ana Carolina
dc.contributor.authorBorges, Alessandra Buhler
dc.contributor.institutionUniversidade Estadual Paulista (Unesp)
dc.date.accessioned2015-12-07T15:33:36Z
dc.date.available2015-12-07T15:33:36Z
dc.date.issued2015
dc.description.abstractThis in vitro study compared the effect of bleaching agents modified by the addition of calcium and/or fluoride and the application of a nano-hydroxyapatite paste after bleaching, on the susceptibility of enamel to erosion. Bovine enamel cylindrical samples (3 mm diameter) were assigned to six groups (n = 20 specimens/group) according to the bleaching agent: no bleaching (C-control), 7.5% hydrogen peroxide gel (HP), HP with 0.5% calcium gluconate (HP+Ca), HP with 0.2% sodium fluoride (HP+F), HP with calcium and fluoride (HP+Ca+F) and HP followed by the application of a nano-hydroxyapatite agent (HP+NanoP). The gels were applied on the enamel surface (1 h) followed by cyclic erosive challenges (Sprite Zero®-2 min), for 14 days. The paste was applied after bleaching for 5 min (HP+NanoP). The enamel surface alteration was measured by contact profilometry (µm) (after 7 and 14 days). C-control (mean ± SD: 2.29 ± 0.37 at 7 days/4.86 ± 0.72 at 14 days) showed significantly lower loss compared to the experimental groups. HP+Ca (3.34 ± 0.37/6.75 ± 1.09) and HP+F (4.49 ± 0.92/7.61 ± 0.90) presented significantly lower enamel loss than HP (4.18 ± 0.50/10.30 ± 1.58) only for 14 days and HP+Ca+F (4.92 ± 1.03/8.12 ± 1.52) showed values similar to the HP+F group. The HP+NanoP (5.51 ± 1.04/9.61 ± 1.21) resulted in enamel loss similar to the HP after 14 days. It was found that 7.5% hydrogen peroxide increased the susceptibility of enamel to erosion. The addition of calcium or fluoride to the bleaching gel reduced the erosion effect, while the nano-hydroxyapatite agent did not provide any protective effect.en
dc.description.affiliationDepartment of Restorative Dentistry, Institute of Science and Technology, Univ Estadual Paulista UNESP , São José dos Campos, SP , Brazil.
dc.description.affiliationUnespDepartment of Restorative Dentistry, Institute of Science and Technology, Univ Estadual Paulista UNESP , São José dos Campos, SP , Brazil.
dc.format.extent1-6
dc.identifierhttp://dx.doi.org/10.3109/00016357.2015.1053150
dc.identifier.citationActa Odontologica Scandinavica, p. 1-6, 2015.
dc.identifier.doi10.3109/00016357.2015.1053150
dc.identifier.issn1502-3850
dc.identifier.lattes3135367849609938
dc.identifier.lattes6960470053037905
dc.identifier.pubmed26083582
dc.identifier.urihttp://hdl.handle.net/11449/131299
dc.language.isoeng
dc.publisherActa Odontologica Scandinavica
dc.relation.ispartofActa Odontologica Scandinavica
dc.relation.ispartofsjr0,706
dc.rights.accessRightsAcesso restrito
dc.sourcePubMed
dc.subjectEnamelen
dc.subjectErosionen
dc.subjectHydrogen peroxideen
dc.subjectTooth bleachingen
dc.subjectTooth wearen
dc.titleEffect of home-bleaching gels modified by calcium and/or fluoride and the application of nano-hydroxyapatite paste on in vitro enamel erosion susceptibilityen
dc.typeArtigo
dcterms.rightsHolderActa Odontologica Scandinavica
unesp.author.lattes3135367849609938[2]
unesp.author.lattes6960470053037905[5]
unesp.author.orcid0000-0003-0521-7922[3]
unesp.author.orcid0000-0001-7686-089X[5]
unesp.author.orcid0000-0002-9485-5514[2]
unesp.campusUniversidade Estadual Paulista (Unesp), Instituto de Ciência e Tecnologia, São José dos Campospt

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