Marginal adaptation of Class 2 adhesive restorations

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dc.contributor.authorDuarte, Sillas
dc.contributor.authorCury Saad, Jose Roberto [UNESP]
dc.contributor.institutionCase Western Reserve Univ
dc.contributor.institutionUniversidade Estadual Paulista (Unesp)
dc.date.accessioned2014-05-20T13:47:11Z
dc.date.available2014-05-20T13:47:11Z
dc.date.issued2008-05-01
dc.description.abstractObjective: Control of microleakage represents a challenge for posterior composite restorations. The technique for composite placement may reduce microleakage. The null hypothesis of this in vitro study was that centripetal incremental insertion of composite resin would result in less microleakage than that obtained with the oblique incremental technique or bulk technique. Method and Materials: Standardized Class 2 preparations were made in 60 caries-free extracted third molars and randomly assigned to 3 groups ( n = 20): ( 1) oblique incremental insertion technique ( control), ( 2) centripetal incremental insertion technique, and ( 3) bulk insertion. The teeth were restored with a total-etch adhesive and micro-hybrid composite resin. The specimens were isolated with nail varnish except for a 2-mm-wide area around the restoration and then thermocycled ( 1,000 thermal cycles, 5 degrees C/ 55 degrees C; 30-second dwell time). The specimens were immersed in an aqueous solution of 50% silver nitrate for 24 hours, followed by 8 hours of immersion in a photo-developing solution and subsequently evaluated for leakage. The microleakage scores ( 0 to 4) obtained from the occlusal and cervical walls were analyzed with median nonparametric tests ( P <.05). Results: The null hypothesis was rejected. All techniques attained statistically similar dentin microleakage scores ( P =.15). The centripetal insertion technique displayed significantly less microleakage than the oblique technique at the enamel margins ( P =.04). Conclusion: None of the techniques eliminated marginal microleakage in Class 2 preparations. However, in occlusal areas, the centripetal technique performed significantly better than the other techniques.en
dc.description.affiliationCase Western Reserve Univ, Sch Dent Med, Dept Comprehens Care, Cleveland, OH 44106 USA
dc.description.affiliationUniv Estadual Paulista, Araraquara Sch Dent, Dept Restorat Dent, São Paulo, Brazil
dc.description.affiliationUnespUniv Estadual Paulista, Araraquara Sch Dent, Dept Restorat Dent, São Paulo, Brazil
dc.format.extent413-419
dc.identifierhttp://www.quintpub.com/journals/qi/abstract.php?article_id=3354#.UjDSfcZwp5I
dc.identifier.citationQuintessence International. Hanover Park: Quintessence Publishing Co Inc, v. 39, n. 5, p. 413-419, 2008.
dc.identifier.issn0033-6572
dc.identifier.lattes1541792949750106
dc.identifier.urihttp://hdl.handle.net/11449/16759
dc.identifier.wosWOS:000257892600007
dc.language.isoeng
dc.publisherQuintessence Publishing Co Inc
dc.relation.ispartofQuintessence International
dc.relation.ispartofjcr1.088
dc.relation.ispartofsjr0,563
dc.rights.accessRightsAcesso restrito
dc.sourceWeb of Science
dc.subjectbulken
dc.subjectcentripetal placementen
dc.subjectClass 2 composite resinen
dc.subjectdentinen
dc.subjectenamelen
dc.subjectmarginal adaptationen
dc.subjectoblique placementen
dc.titleMarginal adaptation of Class 2 adhesive restorationsen
dc.typeArtigo
dcterms.licensehttp://www.quintpub.com/journals/jop/orderreprints.php
dcterms.rightsHolderQuintessence Publishing Co Inc
unesp.author.lattes1541792949750106
unesp.campusUniversidade Estadual Paulista (Unesp), Faculdade de Odontologia, Araraquarapt

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Artigos - Odontologia Restauradora - FOAR