Development of an experimental glass ionomer cement containing niobium and fluoride

dc.contributor.authorBertolini, M. J.
dc.contributor.authorZaghete, M. A.
dc.contributor.authorGimenes, R.
dc.contributor.institutionUniversidade Estadual Paulista (Unesp)
dc.date.accessioned2014-05-20T15:20:23Z
dc.date.available2014-05-20T15:20:23Z
dc.date.issued2005-12-15
dc.description.abstractGlass ionomer cements (GICs) are currently used for various dental applications such as luting cements or as restorative materials. The calcium fluoro-alumino-silicate system is the basis for degradable glasses used to obtain the GICs. The purpose of the present paper is to add niobium to conventional glass system because according to previous papers niobium addition improves the chemical resistance and the mechanical properties of glasses. Therefore, the GICs prepared from these glasses would result in cements with higher chemical and mechanical resistance. The niobium fluoride powders were prepared using the sol-gel process and were characterized by X-ray diffraction, differential thermal analysis (DTA) and Al-27 and Si-29 MAS NMR. The results obtained by XRD showed that the powders prepared by this method are glass-ceramic. In the DTA curve was detected the presence of T-g and T-c temperatures. The analysis of MAS NMR spectra indicated that the framework of the powders is formed by SiO4 and AlO4 linked tetrahedra which are essential structures to yield the cements. Thus, we concluded that niobium fluoride silicate powders can be used in the preparation of GICs. (c) 2005 Elsevier B.V. All rights reserved.en
dc.description.affiliationUNESP, Inst Chem, BR-14801970 Araraquara, SP, Brazil
dc.description.affiliationUnespUNESP, Inst Chem, BR-14801970 Araraquara, SP, Brazil
dc.format.extent3884-3887
dc.identifierhttp://dx.doi.org/10.1016/j.jnoncrysol.2005.10.008
dc.identifier.citationJournal of Non-crystalline Solids. Amsterdam: Elsevier B.V., v. 351, n. 52-54, p. 3884-3887, 2005.
dc.identifier.doi10.1016/j.jnoncrysol.2005.10.008
dc.identifier.issn0022-3093
dc.identifier.urihttp://hdl.handle.net/11449/31696
dc.identifier.wosWOS:000234022400016
dc.language.isoeng
dc.publisherElsevier B.V.
dc.relation.ispartofJournal of Non-Crystalline Solids
dc.relation.ispartofjcr2.488
dc.relation.ispartofsjr0,722
dc.rights.accessRightsAcesso restrito
dc.sourceWeb of Science
dc.titleDevelopment of an experimental glass ionomer cement containing niobium and fluorideen
dc.typeArtigo
dcterms.licensehttp://www.elsevier.com/about/open-access/open-access-policies/article-posting-policy
dcterms.rightsHolderElsevier B.V.
unesp.campusUniversidade Estadual Paulista (Unesp), Instituto de Química, Araraquarapt

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