The influence of chemical activation on hardness of dual-curing resin cements.

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dc.contributor.authorFonseca, Renata Garcia [UNESP]
dc.contributor.authorCruz, Carlos Alberto dos Santos [UNESP]
dc.contributor.authorAdabo, Gelson Luis [UNESP]
dc.contributor.institutionUniversidade Estadual Paulista (Unesp)
dc.date.accessioned2014-05-27T11:21:06Z
dc.date.available2014-05-27T11:21:06Z
dc.date.issued2004-07-01
dc.description.abstractDuring the cementation of metallic restorations, the polymerization of dual-curing resin cements depends exclusively on chemical activation. This study evaluated the influence of chemical activation compared with dual-curing (chemical and light activation), on the hardness of four dual-curing resin cements. In a darkened environment, equal weight proportions of base and catalyst pastes of the cements Scotchbond Resin Cement, Variolink II, Enforce and Panavia F were mixed and inserted into moulds with cavities of 4 mm in diameter and 2 mm in height. Subsequently, the cements were: 1) not exposed to light (chemical activation = self-cured groups) or 2) photoactivated (dual-curing = dual-cured groups). The Vickers hardness number was measured at 1 hour, 24 hours and 7 days after the start time of cements' spatulation. For all the cements, the hardness values of self-cured groups were lower than those of the respective dual-cured groups at 1 hour and 24 hours. At 7 days, this behavior continued for Variolink II and Panavia F, whilst for Scotchbond Resin Cement and Enforce there was no statistical difference between the two activation modes. All cements showed a significant increase in their hardness values from 1 hour to 7 days for both activation modes. Of the self-cured groups, Scotchbond Resin Cement and Variolink II presented the highest and the lowest hardness values, respectively, for all three times tested. Within the limitations of this study, up to the time of 24 h, chemical activation alone was unable to promote similar hardness as to that obtained with dual-curing.en
dc.format.extent228-232
dc.identifierhttp://dx.doi.org/10.1590/S1806-83242004000300009
dc.identifier.citationPesquisa odontologica brasileira = Brazilian oral research, v. 18, n. 3, p. 228-232, 2004.
dc.identifier.doi10.1590/S1806-83242004000300009
dc.identifier.file2-s2.0-28744436494.pdf
dc.identifier.issn1806-8324
dc.identifier.lattes3041561340615890
dc.identifier.lattes9056474544845038
dc.identifier.lattes2851339311179809
dc.identifier.scieloS1806-83242004000300009
dc.identifier.scopus2-s2.0-28744436494
dc.identifier.urihttp://hdl.handle.net/11449/67791
dc.language.isoeng
dc.relation.ispartofPesquisa Odontológica Brasileira = Brazilian Oral Research
dc.rights.accessRightsAcesso aberto
dc.sourceScopus
dc.subjectbisphenol A bis(2 hydroxypropyl) ether dimethacrylate
dc.subjectDuo Cement
dc.subjectresin cement
dc.subjectanalysis of variance
dc.subjectchemistry
dc.subjectcomparative study
dc.subjectdental bonding
dc.subjecthardness
dc.subjecthuman
dc.subjectmaterials testing
dc.subjecttime
dc.subjectAnalysis of Variance
dc.subjectBisphenol A-Glycidyl Methacrylate
dc.subjectDental Bonding
dc.subjectHardness
dc.subjectHumans
dc.subjectMaterials Testing
dc.subjectResin Cements
dc.subjectTime Factors
dc.titleThe influence of chemical activation on hardness of dual-curing resin cements.en
dc.typeArtigo
dcterms.licensehttp://www.scielo.br/revistas/pob/paboutj.htm#Propriedade
unesp.author.lattes3041561340615890
unesp.author.lattes9056474544845038[2]
unesp.author.lattes2851339311179809
unesp.author.orcid0000-0002-0734-7926[3]
unesp.author.orcid0000-0001-6657-913X[1]
unesp.author.orcid0000-0001-8406-4797[2]
unesp.campusUniversidade Estadual Paulista (Unesp), Faculdade de Odontologia, Araraquarapt

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