Influence of microthreads and platform switching on stress distribution in bone using angled abutments

Página do item simplificado
dc.contributor.authorFerraz, Cacilda Cunha
dc.contributor.authorAnchieta, Rodolfo Bruniera [UNESP]
dc.contributor.authorde Almeida, Erika Oliveira [UNESP]
dc.contributor.authorFreitas, Amilcar Chagas [UNESP]
dc.contributor.authorFerraz, Fábio Cunha
dc.contributor.authorMachado, Lucas Silveira [UNESP]
dc.contributor.authorRocha, Eduardo Passos [UNESP]
dc.contributor.institutionSão Leopoldo Mandic Dental School
dc.contributor.institutionUniversidade Estadual Paulista (Unesp)
dc.contributor.institutionCatholic University
dc.date.accessioned2014-05-27T11:27:03Z
dc.date.available2014-05-27T11:27:03Z
dc.date.issued2012-10-01
dc.description.abstractPurpose: To evaluate the stress distribution in peri-implant bone by simulating the effect of an implant with microthreads and platform switching on angled abutments through tridimensional finite element analysis. The postulated hypothesis was that the presence of microthreads and platform switching would reduce the stress concentration in the cortical bone. Methods: Four mathematical models of a central incisor supported by an implant (5.0mm×13mm) were created in which the type of thread surface in the neck portion (microthreaded or smooth) and the diameter of the angled abutment connection (5.0 and 4.1mm) were varied. These models included the RM (regular platform and microthreads), the RS (regular platform and smooth neck surface), the SM (platform switching and microthreads), and the SS (platform switching and smooth neck). The analysis was performed using ANSYS Workbench 10.0 (Swanson Analysis System). An oblique load (100N) was applied to the palatine surface of the central incisor. The bone/implant interface was considered to be perfectly integrated. Values for the maximum (σmax) and minimum (σmin) principal stress, the equivalent von Mises stress (σvM), and the maximum principal elastic strain (e{open}max) for cortical and trabecular bone were obtained. Results: For the cortical bone, the highest σmax (MPa) were observed for the RM (55.1), the RS (51.0), the SM (49.5), and the SS (44.8) models. The highest σvM (MPa) were found for the RM (45.4), the SM (42.1), the RS (38.7), and the SS models (37). The highest values for σmin were found for the RM, SM, RS and SS models. For the trabecular bone, the highest σmax values (MPa) were observed in the RS model (6.55), followed by the RM (6.37), SS (5.6), and SM (5.2) models. Conclusion: The hypothesis that the presence of microthreads and a switching platform would reduce the stress concentration in the cortical bone was partially rejected, mainly because the microthreads increased the stress concentration in cortical bone. Only platform switching reduced the stress in cortical bone. © 2012 Japan Prosthodontic Society.en
dc.description.affiliationPost Graduate Center São Leopoldo Mandic Dental School, Campinas, SP
dc.description.affiliationDepartment of Dental Materials and Prosthodontics Araçatuba Dental School UNESP - Univ. Estadual Paulista, SP
dc.description.affiliationCatholic University, Minas Gerais
dc.description.affiliationDepartment of Restorative Dentistry Araçatuba Dental School UNESP - Univ. Estadual Paulista, SP
dc.description.affiliationUnespDepartment of Dental Materials and Prosthodontics Araçatuba Dental School UNESP - Univ. Estadual Paulista, SP
dc.description.affiliationUnespDepartment of Restorative Dentistry Araçatuba Dental School UNESP - Univ. Estadual Paulista, SP
dc.format.extent256-263
dc.identifierhttp://dx.doi.org/10.1016/j.jpor.2012.02.002
dc.identifier.citationJournal of Prosthodontic Research, v. 56, n. 4, p. 256-263, 2012.
dc.identifier.doi10.1016/j.jpor.2012.02.002
dc.identifier.issn1883-1958
dc.identifier.lattes3383392287039820
dc.identifier.scopus2-s2.0-84870244726
dc.identifier.urihttp://hdl.handle.net/11449/73608
dc.language.isoeng
dc.relation.ispartofJournal of Prosthodontic Research
dc.relation.ispartofjcr3.306
dc.relation.ispartofsjr1,203
dc.rights.accessRightsAcesso restrito
dc.sourceScopus
dc.subjectDental implants
dc.subjectFinite element
dc.subjectMicrothreads
dc.subjectPlatform switching
dc.subjectStress
dc.titleInfluence of microthreads and platform switching on stress distribution in bone using angled abutmentsen
dc.typeArtigo
dcterms.licensehttp://www.elsevier.com/about/open-access/open-access-policies/article-posting-policy
unesp.author.lattes3383392287039820
unesp.campusUniversidade Estadual Paulista (Unesp), Faculdade de Odontologia, Araçatubapt

Arquivos

Coleções

Artigos - Materiais Odontológicos e Prótese - FOA
Artigos - Odontologia Restauradora - FOA