Evaluation of glass ionomer cements properties obtained from niobium silicate glasses prepared by chemical process

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dc.contributor.authorBertolini, M. J.
dc.contributor.authorPalma-Dibb, R. G.
dc.contributor.authorZaghete, M. A.
dc.contributor.authorGimenes, R.
dc.contributor.institutionUniversidade Estadual Paulista (Unesp)
dc.contributor.institutionUniversidade de São Paulo (USP)
dc.date.accessioned2014-05-20T15:26:20Z
dc.date.available2014-05-20T15:26:20Z
dc.date.issued2005-03-15
dc.description.abstractGlass ionomer cements (GICs) are glass and polymer composite materials. These materials currently find use in the dental field. The purpose of this work is to obtain systems based on composition 4.5SiO(2)-3Al(2)O(3)-XNb2O5-2CaO to be used in Dentistry. The systems were prepared by chemical route at 700 degrees C. The results obtained by XRD and DTA showed that all systems prepared are glasses. The structures of the obtained glasses were compared to commercial material using Al-27 and Si-29 MAS NMR. The analysis of MAS NMR spectra indicated that the systems developed and commercial material are formed by SiO4 and AlO4 linked tetrahedra. The properties of glass ionomer cements based on the glasses prepared with several niobium contents were studied. Setting and working times of the cement pastes, microhardness and diametral tensile strength were evaluated for the experimental GICs and commercial luting cements. It was concluded that setting time of the cement pastes increased with increasing niobium content of the glasses (X). The properties to the GICs such as setting time and microhardness were influenced by niobium content. (c) 2005 Elsevier B.V. All rights reserved.en
dc.description.affiliationUNESP, Inst Quim Araraquara, BR-14801970 Araraquara, SP, Brazil
dc.description.affiliationUSP, Fac Odontol Ribeirao Preto, BR-14040904 Ribeirao Preto, SP, Brazil
dc.description.affiliationUnespUNESP, Inst Quim Araraquara, BR-14801970 Araraquara, SP, Brazil
dc.format.extent466-471
dc.identifierhttp://dx.doi.org/10.1016/j.jnoncrysol.2005.01.040
dc.identifier.citationJournal of Non-crystalline Solids. Amsterdam: Elsevier B.V., v. 351, n. 6-7, p. 466-471, 2005.
dc.identifier.doi10.1016/j.jnoncrysol.2005.01.040
dc.identifier.issn0022-3093
dc.identifier.urihttp://hdl.handle.net/11449/36517
dc.identifier.wosWOS:000230067300002
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.titleEvaluation of glass ionomer cements properties obtained from niobium silicate glasses prepared by chemical processen
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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