Effect of Conventional and Resin-modified Glass-Ionomer Liner on Dentin Adhesive Interface of Class I Cavity Walls After Thermocycling

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dc.contributor.authorSampaio, P. C. P.
dc.contributor.authorde Almeida Junior, A. A. [UNESP]
dc.contributor.authorFrancisconi, L. F.
dc.contributor.authorCasas-Apayco, L. C.
dc.contributor.authorPereira, J. C.
dc.contributor.authorWang, L.
dc.contributor.authorAtta, M. T.
dc.contributor.institutionUniversidade de São Paulo (USP)
dc.contributor.institutionUniversidade Estadual Paulista (Unesp)
dc.date.accessioned2014-05-20T13:46:36Z
dc.date.available2014-05-20T13:46:36Z
dc.date.issued2011-07-01
dc.description.abstractObjective: The aim of this in vitro study was to analyze the effect of glass-ionomer cement as a liner on the dentin/resin adhesive interface of lateral walls of occlusal restorations after thermocycling.Materials and Methods: Occlusal cavities were prepared in 60 human molars, divided into six groups: no liner (1 and 4); glass-ionomer cement (GIC, Ketac Molar Easymix, 3M ESPE) (2 and 5); and resin-modified glass-ionomer cement (RMGIC, Vitrebond, 3M ESPE) (3 and 6). Resin composite (Filtek Z250, 3M ESPE) was placed after application of an adhesive system (Adper Single Bond 2, 3M ESPE) that was mixed with a fluorescent reagent (Rhodamine B) to allow confocal microscopy analysis. Specimens of groups 4, 5 and 6 were thermocycled (5 degrees C-55 degrees C) with a dwell time of 30 seconds for 5000 cycles. After this period, teeth were sectioned in approximately 0.8-mm slices. One slice of each tooth was randomly selected for confocal microscopy analysis. The other slices were sectioned into 0.8 nun x 0.8 mm beams, which were submitted to microtensile testing (MPa). Data were analyzed using two-way ANOVA and Tukey test (p < 0.05).Results: There was no detectedstatistical difference on bond strength among groups (alpha < 0.05). Confocal microscopy analysis showed a higher mean gap size in group 4(12.5 mu m) and a higher percentage of marginal gaps in the thermocycled groups. The RNIGIC liner groups showed the lowest percentage of marginal gaps.Conclusions: Lining with RMGIC resulted in less gap formation at the dentin/resin adhesive interface after artificial aging. RMGIC or GIC liners did not alter the microtensile bond strength of adhesive system/resin composite to dentin on the lateral walls of Class I restorations.en
dc.description.affiliationUniv São Paulo, Bauru Sch Dent, Dept Operat Dent Endodont & Dent Mat, São Paulo, Brazil
dc.description.affiliationUniv Estadual Paulista, UNESP, Araraquara Dent Sch, Dept Dent Mat & Prosthodont, São Paulo, Brazil
dc.description.affiliationUnespUniv Estadual Paulista, UNESP, Araraquara Dent Sch, Dept Dent Mat & Prosthodont, São Paulo, Brazil
dc.format.extent403-412
dc.identifierhttp://dx.doi.org/10.2341/09-240-L
dc.identifier.citationOperative Dentistry. Indianapolis: Operative Dentistry Inc, v. 36, n. 4, p. 403-412, 2011.
dc.identifier.doi10.2341/09-240-L
dc.identifier.issn0361-7734
dc.identifier.urihttp://hdl.handle.net/11449/16508
dc.identifier.wosWOS:000295108000009
dc.language.isoeng
dc.publisherOperative Dentistry Inc
dc.relation.ispartofOperative Dentistry
dc.relation.ispartofjcr2.130
dc.relation.ispartofsjr1,180
dc.rights.accessRightsAcesso restrito
dc.sourceWeb of Science
dc.titleEffect of Conventional and Resin-modified Glass-Ionomer Liner on Dentin Adhesive Interface of Class I Cavity Walls After Thermocyclingen
dc.typeArtigo
dcterms.rightsHolderOperative Dentistry Inc
unesp.author.orcid0000-0001-6308-2769[6]
unesp.campusUniversidade Estadual Paulista (Unesp), Faculdade de Odontologia, Araraquarapt

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