Mechanical behavior of ceramic veneer in zirconia-based restorations: a 3-dimensional finite element analysis using microcomputed tomography data

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dc.contributor.authorRocha, Eduardo Passos [UNESP]
dc.contributor.authorAnchieta, Rodolfo Bruniera [UNESP]
dc.contributor.authorFreitas Junior, Amilcar Chagas [UNESP]
dc.contributor.authorde Almeida, Erika Oliveira [UNESP]
dc.contributor.authorCattaneo, Paolo M.
dc.contributor.authorKo, Ching Chang
dc.contributor.institutionAarhus University (AU)
dc.contributor.institutionUniversity of North Carolina
dc.contributor.institutionUniversidade Estadual Paulista (Unesp)
dc.date.accessioned2013-09-30T18:29:58Z
dc.date.accessioned2014-05-20T13:43:39Z
dc.date.available2013-09-30T18:29:58Z
dc.date.available2014-05-20T13:43:39Z
dc.date.issued2011-01-01
dc.description.abstractStatement of problem. The fracture or chipping of ceramic veneers is a common problem for zirconia-based restorations.Purpose. This study evaluated the stress distribution in the veneer of a maxillary central incisor restored with a complete crown using a zirconia core with a feldspathic ceramic veneer, simulating an incomplete bond between the veneer and zirconia substructure.Material and methods. Based on a microcomputed tomography of a maxillary central incisor, 3 finite element models (M) for a complete crown were developed: Mf, a complete crown based on feldspathic ceramic; Mlz, a zirconia-based complete crown with a complete bond at the zirconia/veneer interface; and Mnzl, similar to Mlz, but with an incomplete bond at the zirconia/veneer interface created by using a contact element with a frictional coefficient of 0.3. A distributed load of 1 N was applied to the lingual surface at 45 degrees to the long axis of the tooth.Results. The zirconia core in the Mnzl model showed peak stresses for maximum principal stress (sigma(max)) and shear stress of 9.02 and 8.81 MPa, respectively. The ceramic veneer in the Mnlz model showed peak stresses for sigma(max), minimum principal stress (compressive), and von Mises stresses of 5.4 MPa, 61.23 MPa, and 35.19 MPa, respectively.Conclusions. The incomplete bond increased the sigma(max) in the ceramic veneer in comparison to the perfect bond condition. (J Prosthet Dent 2010;105: 14-20)en
dc.description.affiliationAarhus Univ, Aarhus, Denmark
dc.description.affiliationUniv Aarhus, Dept Orthodont, DK-8000 Aarhus C, Denmark
dc.description.affiliationUniv N Carolina, Dept Orthodont, Chapel Hill, NC USA
dc.description.affiliationSão Paulo State Univ UNESP, Fac Dent, Dept Dent Mat & Prosthodont, Aracatuba, SP, Brazil
dc.description.affiliationUnespSão Paulo State Univ UNESP, Fac Dent, Dept Dent Mat & Prosthodont, Aracatuba, SP, Brazil
dc.description.sponsorshipFundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)
dc.description.sponsorshipCoordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)
dc.description.sponsorshipIdFAPESP: 08/00209-9
dc.description.sponsorshipIdCAPES: BEX 2325-05-5
dc.format.extent14-20
dc.identifierhttp://dx.doi.org/10.1016/S0022-3913(10)60184-9
dc.identifier.citationJournal of Prosthetic Dentistry. New York: Mosby-elsevier, v. 105, n. 1, p. 14-20, 2011.
dc.identifier.doi10.1016/S0022-3913(10)60184-9
dc.identifier.issn0022-3913
dc.identifier.lattes3383392287039820
dc.identifier.urihttp://hdl.handle.net/11449/15244
dc.identifier.wosWOS:000287012100003
dc.language.isoeng
dc.publisherMosby-elsevier
dc.relation.ispartofJournal of Prosthetic Dentistry
dc.relation.ispartofjcr2.347
dc.relation.ispartofsjr1,087
dc.rights.accessRightsAcesso restrito
dc.sourceWeb of Science
dc.titleMechanical behavior of ceramic veneer in zirconia-based restorations: a 3-dimensional finite element analysis using microcomputed tomography dataen
dc.typeArtigo
dcterms.licensehttp://www.elsevier.com/about/open-access/open-access-policies/article-posting-policy
dcterms.rightsHolderMosby-elsevier
unesp.author.lattes3383392287039820
unesp.author.orcid0000-0001-7604-3259[5]
unesp.campusUniversidade Estadual Paulista (Unesp), Faculdade de Odontologia, Araçatubapt

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