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dc.contributor.authorGresnigt, Marco M. M.-
dc.contributor.authorOzcan, Mutlu-
dc.contributor.authorKalk, Warner-
dc.contributor.authorGalhano, Graziela A. P.-
dc.identifier.citationJournal of Adhesive Dentistry. Hanover Park: Quintessence Publishing Co Inc, v. 13, n. 6, p. 569-577, 2011.-
dc.description.abstractPurpose: Existing composite restorations on teeth are often remade prior to the cementation of fixed dental prostheses. The aim of this study was to evaluate the effect of static and cyclic loading on ceramic laminate veneers adhered to aged resin composite restorations.Materials and Methods: Eighty sound maxillary incisors were collected and randomly divided into four groups: group 1: control group, no restorations; group 2: two Class III restorations; group 3: two Class IV restorations; group 4: complete composite substrate. Standard composite restorations were made using a microhybrid resin composite (Anterior Shine). Restored teeth were subjected to thermocycling (6000 cycles). Window preparations were made on the labial surface of the teeth for ceramic laminate fabrication (Empress II). Teeth were conditioned using an etch-and-rinse system. Existing composite restorations representing the aged composites were silica coated (CoJet) and silanized (ESPE-Sil). Ceramic laminates were cemented using a bis-GMA-based cement (Variolink Veneer). The specimens were randomly divided into two groups and were subjected to either static (groups 1a, 2a, 3a, 4a) or cyclic loading (groups 1b, 2b, 3b, 4b). Failure type and location after loading were classified. Data were analyzed using one-way ANOVA and Tukey's test.Results: Significantly higher fracture strength was obtained in group 4 (330 +/- 81 N) compared to the controls in group 1 (179 +/- 120 N) (one-way ANOVA, p < 0.05). Group lb survived a lower mean number of cyclic loads (672,820 cycles) than teeth of groups 2b to 4b (846x10(3) to 873x10(3) cycles). Failure type evaluation after the fracture test showed predominantly adhesive failures between dentin and cement, but after cyclic loading, more cohesive fractures in the ceramic were seen.Conclusion: Ceramic laminate veneers bonded to conditioned aged composite restorations provided favorable results. Surface conditioning of existing restorations may eliminate the necessity of removing aged composite restorations.en
dc.publisherQuintessence Publishing Co Inc-
dc.sourceWeb of Science-
dc.subjectceramic veneeren
dc.subjectcyclic loadingen
dc.subjectesthetic dentistryen
dc.subjectglass ceramicen
dc.subjectresin compositeen
dc.subjectsilica coatingen
dc.subjectsurface conditioningen
dc.titleEffect of Static and Cyclic Loading on Ceramic Laminate Veneers Adhered to Teeth with and Without Aged Composite Restorationsen
dc.contributor.institutionUniv Groningen, Univ Med Ctr Groningen-
dc.contributor.institutionUniv Zurich-
dc.contributor.institutionUniversidade Estadual Paulista (UNESP)-
dc.description.affiliationUniv Groningen, Univ Med Ctr Groningen, Ctr Dent & Oral Hyg, Dept Oral Funct Implantol & Clin Dent Bioma, NL-9713 AV Groningen, Netherlands-
dc.description.affiliationUniv Zurich, Dent Mat Unit, Ctr Dent & Oral Med, Clin Fixed & Removable Prosthodont & Dent Mat Sci, Zurich, Switzerland-
dc.description.affiliationSão Paulo State Univ, Dept Dent Mat & Prosthodont, Sao Jose Dos Campos, Brazil-
dc.description.affiliationUnespSão Paulo State Univ, Dept Dent Mat & Prosthodont, Sao Jose Dos Campos, Brazil-
dc.rights.accessRightsAcesso restrito-
dc.relation.ispartofJournal of Adhesive Dentistry-
Appears in Collections:Artigos, TCCs, Teses e Dissertações da Unesp

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