Protection of short-time enamel erosion by different tetrafluoride compounds

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dc.contributor.authorWiegand, Annette
dc.contributor.authorLaabs, Koija Alexander
dc.contributor.authorGressmann, Grit
dc.contributor.authorRoos, Malgorzata
dc.contributor.authorMagalhaes, Ana Carolina [UNESP]
dc.contributor.authorAttin, Thomas
dc.contributor.institutionUniv Zurich
dc.contributor.institutionUniv Gottingen
dc.contributor.institutionUniversidade Estadual Paulista (Unesp)
dc.date.accessioned2013-09-30T18:30:26Z
dc.date.accessioned2014-05-20T13:44:09Z
dc.date.available2013-09-30T18:30:26Z
dc.date.available2014-05-20T13:44:09Z
dc.date.issued2008-06-01
dc.description.abstractobjective: This in vitro study aimed to analyse the protective effect of differently concentrated titanium (TiF4), zirconium (ZrF4) and hafnium (HfF4) tetrafluoride on enamel erosion. Methods: Polished enamel surfaces of 36 bovine crowns were covered with tape leaving 4 enamel windows each 3 mm in diameter exposed. The crowns were randomly assigned to six groups (each n = 6) and pretreated with 4% TiF4, 10% TiF4, 4% ZrF4, 10% ZrF4, 4% HfF4 or 10% HfF4 for 4 min (first window), 10 min (second window) or 15 min (third window). The fourth window of each crown was not pretreated and served as control. Erosion was performed stepwise with 1% HCl (pH 2) in five consecutive intervals of each 15 s (total 75 s). Enamel dissolution was quantified by colorimetric determination of phosphate release into the acid. For each tooth, cumulative phosphate loss of enamel pretreated with one of the tetrafluoride compounds was calculated as percentage of the respective control and statistically analysed using two-way ANOVA.Results: Enamel erosion was significantly reduced by TiF4, ZrF4 and HfF4 application. Cumulative phosphate loss (mean % of control, 75 s erosion) after 4-15 min application was significantly lower for 4% ZrF4 (7-11%), 10% ZrF4 (2-6%), 4% HfF4 (11-9%) and 10% HfF4 (12-16%) compared to 4% TiF4 (42-27%) and 10% TiF4 (54-33%). Only for 4% and 10% TiF4, phosphate loss decreased with increasing duration of application, but also increased with increasing acid intervals.Conclusion: TiF4, ZrF4 and HfF4 might protect enamel against short-time erosion, but protection was more enhanced by ZrF4 and HfF4 compared to TiF4 application overtime. (C) 2008 Elsevier Ltd. All rights reserved.en
dc.description.affiliationUniv Zurich, Clin Prevent Dent Periodontol & Cariol, CH-8032 Zurich, Switzerland
dc.description.affiliationUniv Gottingen, Dept Operat Dent Prevent Dent & Periodontol, D-37075 Gottingen, Germany
dc.description.affiliationUniv Zurich, Inst Social & Prevent Med, Biostat Unit, CH-8001 Zurich, Switzerland
dc.description.affiliationSão Paulo State Univ, UNESP, Sch Dent Aracatuba, Dept Pediat Dent, Aracatuba, SP, Brazil
dc.description.affiliationUnespSão Paulo State Univ, UNESP, Sch Dent Aracatuba, Dept Pediat Dent, Aracatuba, SP, Brazil
dc.format.extent497-502
dc.identifierhttp://dx.doi.org/10.1016/j.archoralbio.2008.01.003
dc.identifier.citationArchives of Oral Biology. Oxford: Pergamon-Elsevier B.V. Ltd, v. 53, n. 6, p. 497-502, 2008.
dc.identifier.doi10.1016/j.archoralbio.2008.01.003
dc.identifier.issn0003-9969
dc.identifier.urihttp://hdl.handle.net/11449/15457
dc.identifier.wosWOS:000256133000001
dc.language.isoeng
dc.publisherPergamon-Elsevier B.V. Ltd
dc.relation.ispartofArchives of Oral Biology
dc.relation.ispartofjcr2.050
dc.relation.ispartofsjr0,752
dc.rights.accessRightsAcesso restrito
dc.sourceWeb of Science
dc.subjectenamelen
dc.subjecterosionen
dc.subjectfluorideen
dc.titleProtection of short-time enamel erosion by different tetrafluoride compoundsen
dc.typeArtigo
dcterms.licensehttp://www.elsevier.com/about/open-access/open-access-policies/article-posting-policy
dcterms.rightsHolderPergamon-Elsevier B.V. Ltd
unesp.campusUniversidade Estadual Paulista (Unesp), Faculdade de Odontologia, Araçatubapt

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