Comparison of different designs of implant-retained overdentures and fixed full-arch implant-supported prosthesis on stress distribution in edentulous mandible - A computed tomography-based three-dimensional finite element analysis

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dc.contributor.authorBarão, V. A R [UNESP]
dc.contributor.authorDelben, J. A. [UNESP]
dc.contributor.authorLima, J.
dc.contributor.authorCabral, T.
dc.contributor.authorAssunção, Wirley Goncalves [UNESP]
dc.contributor.institutionUniversidade Estadual Paulista (Unesp)
dc.contributor.institutionSmarttech Company
dc.contributor.institutionUniversidade Estadual de Campinas (UNICAMP)
dc.date.accessioned2014-05-27T11:29:00Z
dc.date.available2014-05-27T11:29:00Z
dc.date.issued2013-04-26
dc.description.abstractA finite element analysis was used to compare the effect of different designs of implant-retained overdentures and fixed full-arch implant-supported prosthesis on stress distribution in edentulous mandible. Four models of an human mandible were constructed. In the OR (O'ring) group, the mandible was restored with an overdenture retained by four unsplinted implants with O'ring attachment; in the BC (bar-clip) -C and BC groups, the mandibles were restored with overdentures retained by four splinted implants with bar-clip anchor associated or not with two distally placed cantilevers, respectively; in the FD (fixed denture) group, the mandible was restored with a fixed full-arch four-implant-supported prosthesis. Models were supported by the masticatory muscles and temporomandibular joints. A 100-N oblique load was applied on the left first molar. Von Mises (σvM), maximum (σmax) and minimum (σmin) principal stresses (in MPa) analyses were obtained. BC-C group exhibited the highest stress values (σvM=398.8, σmax=580.5 and σmin=-455.2) while FD group showed the lowest one (σvM=128.9, σmax=185.9 and σmin=-172.1). Within overdenture groups, the use of unsplinted implants reduced the stress level in the implant/prosthetic components (59.4% for σvM, 66.2% for σmax and 57.7% for σmin versus BC-C group) and supporting tissues (maximum stress reduction of 72% and 79.5% for σmax, and 15.7% and 85.7% for σmin on the cortical and trabecular bones, respectively). Cortical bone exhibited greater stress concentration than the trabecular bone for all groups. The use of fixed implant dentures and removable dentures retained by unsplinted implants to rehabilitate edentulous mandible reduced the stresses in the periimplant bone tissue, mucosa and implant/prosthetic components. © 2013 Elsevier Ltd.en
dc.description.affiliationDepartment of Dental Materials and Prosthodontics Araçatuba Dental School Univ Estadual Paulista (UNESP), Sao Paulo
dc.description.affiliationSmarttech Company, Sao Paulo
dc.description.affiliationDepartment of Prosthodontics and Periodontology Piracicaba Dental School State Univ of Campinas (UNICAMP), Sao Paulo
dc.description.affiliationUnespDepartment of Dental Materials and Prosthodontics Araçatuba Dental School Univ Estadual Paulista (UNESP), Sao Paulo
dc.format.extent1312-1320
dc.identifierhttp://dx.doi.org/10.1016/j.jbiomech.2013.02.008
dc.identifier.citationJournal of Biomechanics, v. 46, n. 7, p. 1312-1320, 2013.
dc.identifier.doi10.1016/j.jbiomech.2013.02.008
dc.identifier.file2-s2.0-84876301000.pdf
dc.identifier.issn0021-9290
dc.identifier.issn1873-2380
dc.identifier.lattes4438747643373395
dc.identifier.scopus2-s2.0-84876301000
dc.identifier.urihttp://hdl.handle.net/11449/75173
dc.identifier.wosWOS:000318583800014
dc.language.isoeng
dc.relation.ispartofJournal of Biomechanics
dc.relation.ispartofjcr2.431
dc.relation.ispartofsjr1,147
dc.rights.accessRightsAcesso aberto
dc.sourceScopus
dc.subjectBiomechanics
dc.subjectDental Implants
dc.subjectFinite element analysis
dc.subjectFixed full-arch prosthesis
dc.subjectOverdenture
dc.subjectImplant-supported prosthesis
dc.subjectMasticatory muscles
dc.subjectPeri-implant bones
dc.subjectPrincipal stress
dc.subjectTemporomandibular joint
dc.subjectThree dimensional finite element analysis
dc.subjectTrabecular bones
dc.subjectArches
dc.subjectBone
dc.subjectComputerized tomography
dc.subjectDental prostheses
dc.subjectFinite difference method
dc.subjectFinite element method
dc.subjectRestoration
dc.subjectStress concentration
dc.subjectTissue
dc.subjectProsthetics
dc.subjectbone stress
dc.subjectcompressive stress
dc.subjectcomputer assisted tomography
dc.subjectcontrolled study
dc.subjectcortical bone
dc.subjectdental abutment
dc.subjectdental retainer
dc.subjectedentulousness
dc.subjectequipment design
dc.subjectfinite element analysis
dc.subjecthuman
dc.subjectmandible prosthesis
dc.subjectmandible reconstruction
dc.subjectmechanical stress
dc.subjectoverlay denture
dc.subjectpriority journal
dc.subjectprocess design
dc.subjectremovable partial denture
dc.subjectstress distibution
dc.subjectthree dimensional imaging
dc.subjecttrabecular bone
dc.titleComparison of different designs of implant-retained overdentures and fixed full-arch implant-supported prosthesis on stress distribution in edentulous mandible - A computed tomography-based three-dimensional finite element analysisen
dc.typeArtigo
dcterms.licensehttp://www.elsevier.com/about/open-access/open-access-policies/article-posting-policy
unesp.author.lattes4438747643373395
unesp.campusUniversidade Estadual Paulista (Unesp), Faculdade de Odontologia, Araçatubapt

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