Adhesive cementation of zirconia posts to root dentin: Evaluation of the mechanical cycling effect

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dc.contributor.authorGalhano, Graziela Ávila Prãdo [UNESP]
dc.contributor.authorde Melo, Renata Marques [UNESP]
dc.contributor.authorPavanelli, Carlos Augusto [UNESP]
dc.contributor.authorBaldissara, Paolo
dc.contributor.authorScotti, Roberto
dc.contributor.authorValandro, Luiz Felipe
dc.contributor.authorBottino, Marco Antonio [UNESP]
dc.contributor.institutionUniversidade Estadual Paulista (Unesp)
dc.contributor.institutionUniversity of Bologna
dc.contributor.institutionFederal University of Santa Maria
dc.date.accessioned2014-05-27T11:23:44Z
dc.date.available2014-05-27T11:23:44Z
dc.date.issued2008-12-01
dc.description.abstractThis study evaluated the effect of mechanical cycling on the bond strength of zirconia posts to root dentin. Thirty single-rooted human teeth were transversally sectioned to a length of 16 mm. The canal preparation was performed with zirconia post system drills (CosmoPost, Ivoclar) to a depth of 12 mm. For post cementation, the canals were treated with total-etch, 3-steps All-Bond 2 (Bisco), and the posts were cemented with Duolink dual resin cement (Bisco). Three groups were formed (n = 10): G1 - control, no mechanical cycling; G2 - 20,000 mechanical cycles; G3 - 2,000,000 mechanical cycles. A 1.6-mm-thick punch induced loads of 50 N, at a 45° angle to the long axis of the specimens and at a frequency of 8 Hz directly on the posts. To evaluate the bond strengths, the specimens were sectioned perpendicular to the long axis of the teeth, generating 2-mm-thick slices, approximately (5 sections per teeth), which were subjected to the push-out test in a universal testing machine at a 1 mm/min crosshead speed. The push-out bond strength was affected by the mechanical cycling (1-way ANOVA, p = .0001). The results of the control group (7.7 ± 1.3 MPa) were statistically higher than those of G2 (3.9 ± 2.2 MPa) and G3 (3.3 ± 2.3 MPa). It was concluded that the mechanical cycling damaged the bond strength of zirconia posts to root dentin.en
dc.description.affiliationDept. of Dental Materials and Prosthodontics School of Dentistry of São José dos Campos São Paulo State University, Av. Francisco José Longo 777, São José dos Campos, SP 12245-000
dc.description.affiliationDept. of Oral Science Alma Mater Studiorum University of Bologna, Bologna
dc.description.affiliationDept. of Restorative Dentistry Federal University of Santa Maria, Santa Maria, RS
dc.description.affiliationUnespDept. of Dental Materials and Prosthodontics School of Dentistry of São José dos Campos São Paulo State University, Av. Francisco José Longo 777, São José dos Campos, SP 12245-000
dc.format.extent264-269
dc.identifierhttp://dx.doi.org/10.1590/S1806-83242008000300013
dc.identifier.citationBrazilian Oral Research, v. 22, n. 3, p. 264-269, 2008.
dc.identifier.doi10.1590/S1806-83242008000300013
dc.identifier.file2-s2.0-60749119694.pdf
dc.identifier.issn1806-8324
dc.identifier.issn1807-3107
dc.identifier.lattes6087378734666740
dc.identifier.lattes9234456003563666
dc.identifier.scieloS1806-83242008000300013
dc.identifier.scopus2-s2.0-60749119694
dc.identifier.urihttp://hdl.handle.net/11449/70719
dc.language.isoeng
dc.relation.ispartofBrazilian Oral Research
dc.relation.ispartofjcr1.223
dc.rights.accessRightsAcesso aberto
dc.sourceScopus
dc.subjectBond strength
dc.subjectCeramics
dc.subjectPost and core technique
dc.subjectStress, mechanical
dc.subjectresin cement
dc.subjectzirconium
dc.subjectzirconium oxide
dc.subjectanalysis of variance
dc.subjectceramics
dc.subjectchemistry
dc.subjectdental bonding
dc.subjectdental care
dc.subjectdentin
dc.subjectendodontics
dc.subjecthuman
dc.subjectinstrumentation
dc.subjectmaterials testing
dc.subjectmechanical stress
dc.subjectmethodology
dc.subjectstandard
dc.subjecttensile strength
dc.subjecttooth crown
dc.subjectAnalysis of Variance
dc.subjectDental Bonding
dc.subjectDental Stress Analysis
dc.subjectDentin
dc.subjectHumans
dc.subjectMaterials Testing
dc.subjectPost and Core Technique
dc.subjectResin Cements
dc.subjectRoot Canal Preparation
dc.subjectStress, Mechanical
dc.subjectTensile Strength
dc.subjectZirconium
dc.titleAdhesive cementation of zirconia posts to root dentin: Evaluation of the mechanical cycling effecten
dc.typeArtigo
dcterms.licensehttp://www.scielo.br/revistas/bor/paboutj.htm
unesp.author.lattes6087378734666740
unesp.author.lattes9234456003563666
unesp.campusUniversidade Estadual Paulista (Unesp), Instituto de Ciência e Tecnologia, São José dos Campospt

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