Photoelastic Analysis of the Distribution of Stress in Different Systems of Overdentures on Osseous-Integrated Implants

dc.creatorMachado, ACM
dc.creatorCardoso, L
dc.creatorBrandt, WC
dc.creatorHenriques, GEP
dc.creatorNobilo, MAD
dc.date2011
dc.dateNOV
dc.date2014-07-30T14:31:44Z
dc.date2015-11-26T16:27:40Z
dc.date2014-07-30T14:31:44Z
dc.date2015-11-26T16:27:40Z
dc.date.accessioned2018-03-28T23:08:36Z
dc.date.available2018-03-28T23:08:36Z
dc.identifierJournal Of Craniofacial Surgery. Lippincott Williams & Wilkins, v. 22, n. 6, n. 2332, n. 2336, 2011.
dc.identifier1049-2275
dc.identifierWOS:000297741900107
dc.identifier10.1097/SCS.0b013e318232a791
dc.identifierhttp://www.repositorio.unicamp.br/jspui/handle/REPOSIP/59604
dc.identifierhttp://repositorio.unicamp.br/jspui/handle/REPOSIP/59604
dc.identifier.urihttp://repositorioslatinoamericanos.uchile.cl/handle/2250/1269249
dc.descriptionObjective: The aim of this study was to evaluate the distribution of generated stress around implants and adjacent bone tissue using different implant-retained overdenture designs through photoelastic analysis. Methods: Over an edentulous human mandible, achieved from a human model, 2 or 4 microunit analog abutments were embedded (Master; Conexao Systems Prosthodontics, Sao Paulo, Brazil), settled in the interforaminal region. Three models of photoelastic resin (Araltec Chemicals Ltda, Hunstman, Guarulhos, Sao Paulo, Brazil), with 2 or 4 incorporated implants and microunit abutments, were obtained from molds using silicone for duplication. Inclusion, finishing, and polishing procedures were applied on the frameworks. This study was based on 3 different mechanisms of implant-retained mandibular overdentures: O'ring (GI), bar-clip (GII) (both with 2 implants), and their association (GIII) (with 4 implants). After the adaptation of each overdenture system on the photoelastic models, 100-N alternate occlusal loads were applied on back-side and frontside regions. The photoelastic analysis was made with the aid of a plain polariscope linked to a digital camera, Sony Cybershot > 100, which allowed visualization of the fringes and registration of images on digital photographs. Results: The results demonstrated higher tension concentrated over the GIII, with a flat distribution of stress to the posterior ridge and overload on the posterior implants. GI showed the smaller stress level, and GII, intermediate level; there was distribution of stress to the posterior ridge in these 2 groups. Conclusion: The use of bar attachment proved to be a better alternative, because it showed a moderate level of tension with a more uniform stress distribution and possessed higher retention than did the ball system.
dc.description22
dc.description6
dc.description2332
dc.description2336
dc.descriptionState of Sao Paulo, Brazil [2005/03595-9]
dc.descriptionState of Sao Paulo, Brazil [2005/03595-9]
dc.languageen
dc.publisherLippincott Williams & Wilkins
dc.publisherPhiladelphia
dc.publisherEUA
dc.relationJournal Of Craniofacial Surgery
dc.relationJ. Craniofac. Surg.
dc.rightsfechado
dc.sourceWeb of Science
dc.subjectOsseointegrated implant
dc.subjectoverdenture
dc.subjectbar system
dc.subjectO'ring
dc.subjectphotoelastic analysis
dc.subjectDenture-bearing Area
dc.subjectMandibular Overdentures
dc.subjectRetained Overdentures
dc.subjectLoad-transfer
dc.subjectSupporting Overdentures
dc.subjectAttachment Selection
dc.subjectAnchorage Systems
dc.subjectBone Reactions
dc.subjectOral Implants
dc.subjectIn-vitro
dc.titlePhotoelastic Analysis of the Distribution of Stress in Different Systems of Overdentures on Osseous-Integrated Implants
dc.typeArtículos de revistas


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