Bond strength durability of direct and indirect composite systems following surface conditioning for repair

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dc.contributor.authorPassos, Sheila Pestana [UNESP]
dc.contributor.authorÖzcan, Mutlu
dc.contributor.authorVanderlei, Aleska Dias [UNESP]
dc.contributor.authorLeite, Fabiola Pessoa Pereira [UNESP]
dc.contributor.authorKimpara, Estevão Tomomitsu [UNESP]
dc.contributor.authorBottino, Marco Antonio [UNESP]
dc.contributor.institutionUniversidade Estadual Paulista (Unesp)
dc.contributor.institutionUniversity of Groningen
dc.date.accessioned2014-05-27T11:22:38Z
dc.date.available2014-05-27T11:22:38Z
dc.date.issued2007-11-16
dc.description.abstractPurpose: This study evaluated the effect of surface conditioning methods and thermocycling on the bond strength between a resin composite and an indirect composite system in order to test the repair bond strength. Materials and Methods: Eighteen blocks (5 x 5 x 4 mm) of indirect resin composite (Sinfony) were fabricated according to the manufacturer's instructions. The specimens were randomly assigned to one of the following two treatment conditions (9 blocks per treatment): (1) 10% hydrofluoric acid (HF) for 90 s (Dentsply) + silanization, (2) silica coating with 30-Ìm SiOx particles (CoJet) + silanization. After surface conditioning, the bonding agent was applied (Adper Single Bond) and light polymerized. The composite resin (W3D Master) was condensed and polymerized incrementally to form a block. Following storage in distilled water at 37°C for 24 h, the indirect composite/resin blocks were sectioned in two axes (x and y) with a diamond disk under coolant irrigation to obtain nontrimmed specimens (sticks) with approximately 0.6 mm2 of bonding area. Twelve specimens were obtained per block (N = 216, n = 108 sticks). The specimens from each repaired block were again randomly divided into 2 groups and tested either after storage in water for 24 h or thermocycling (6000 cycles, 5°C to 55°C). The microtensile bond strength test was performed in a universal testing machine (crosshead speed: 1 mm/min). The mean bond strengths of the specimens of each block were statistically analyzed using two-way ANOVA (α = 0.05). Results: Both surface conditioning (p = 0.0001) and storage conditions (p = 0.0001) had a significant effect on the results. After 24 h water storage, silica coating and silanization (method 2) showed significantly higher bond strength results (46.4 ± 13.8 MPa) than that of hydrofluoric acid etching and silanization (method 1) (35.8 ± 9.7 MPa) (p < 0.001). After thermocycling, no significant difference was found between the mean bond strengths obtained with method 1 (34.1 ± 8.9 MPa) and method 2 (31.9 ± 7.9 MPa) (p > 0.05). Conclusion: Although after 24 h of testing, silica coating and silanization performed significantly better in resin-resin repair bond strength, both HF acid gel and silica coating followed by silanization revealed comparable bond strength results after thermocycling for 6000 times.en
dc.description.affiliationDepartment of Dental Materials and Prosthodontics São Paulo State University at São José Dos Campos
dc.description.affiliationUniversity Medical Center Groningen University of Groningen Department of Dentistry and Dental Hygiene, Groningen
dc.description.affiliationUniversity Medical Center Groningen University of Groningen Department of Dentistry and Dental Hygiene, Antonius Deusinglaan 1, 9713 AV Groningen
dc.description.affiliationUnespDepartment of Dental Materials and Prosthodontics São Paulo State University at São José Dos Campos
dc.format.extent443-447
dc.identifierhttp://www.quintpub.com/journals/jad/abstract.php?article_id=8955#.U0QIX_ldV1Y
dc.identifier.citationJournal of Adhesive Dentistry, v. 9, n. 5, p. 443-447, 2007.
dc.identifier.issn1461-5185
dc.identifier.lattes0967916388665754
dc.identifier.lattes9234456003563666
dc.identifier.orcid0000-0003-0586-4644
dc.identifier.scopus2-s2.0-36049023447
dc.identifier.urihttp://hdl.handle.net/11449/69986
dc.identifier.wosWOS:000250298900006
dc.language.isoeng
dc.relation.ispartofJournal of Adhesive Dentistry
dc.relation.ispartofjcr1.691
dc.relation.ispartofsjr0,839
dc.rights.accessRightsAcesso restrito
dc.sourceScopus
dc.subjectHydrofluoric acid
dc.subjectIndirect composite
dc.subjectMicrotensile test
dc.subjectRepair
dc.subjectSilica coating
dc.subjecthydrofluoric acid
dc.subjectresin
dc.subjectsilane derivative
dc.subjectsilicon dioxide
dc.subjectanalysis of variance
dc.subjectdental bonding
dc.subjectdental care
dc.subjectdental etching
dc.subjectdrug storage
dc.subjectmethodology
dc.subjectrandomization
dc.subjectsurface property
dc.subjecttensile strength
dc.subjecttooth prosthesis
dc.subjectAnalysis of Variance
dc.subjectComposite Resins
dc.subjectDental Bonding
dc.subjectDental Etching
dc.subjectDental Prosthesis Repair
dc.subjectDental Stress Analysis
dc.subjectDrug Storage
dc.subjectHydrofluoric Acid
dc.subjectRandom Allocation
dc.subjectSilanes
dc.subjectSilicon Dioxide
dc.subjectSurface Properties
dc.subjectTensile Strength
dc.titleBond strength durability of direct and indirect composite systems following surface conditioning for repairen
dc.typeArtigo
dcterms.licensehttp://www.quintpub.com/terms.php
unesp.author.lattes0967916388665754[5]
unesp.author.lattes9234456003563666
unesp.author.orcid0000-0003-0586-4644[5]
unesp.campusUniversidade Estadual Paulista (Unesp), Instituto de Ciência e Tecnologia, São José dos Campospt

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