Stress analysis in oral obturator prostheses, part II: photoelastic imaging

dc.contributorUniversidade Estadual Paulista (UNESP)
dc.creatorPesqueira, Aldieris Alves
dc.creatorGoiato, Marcelo Coelho
dc.creatorFreitas da Silva, Emily Vivianne
dc.creatorHaddad, Marcela Filie
dc.creatorMoreno, Amalia
dc.creatorZahoui, Abbas
dc.creatorSantos, Daniela Micheline dos
dc.date2015-03-18T15:55:23Z
dc.date2016-10-25T20:34:27Z
dc.date2015-03-18T15:55:23Z
dc.date2016-10-25T20:34:27Z
dc.date2014-06-01
dc.date.accessioned2017-04-06T07:14:09Z
dc.date.available2017-04-06T07:14:09Z
dc.identifierJournal Of Biomedical Optics. Bellingham: Spie-soc Photo-optical Instrumentation Engineers, v. 19, n. 6, 5 p., 2014.
dc.identifier1083-3668
dc.identifierhttp://hdl.handle.net/11449/117185
dc.identifierhttp://acervodigital.unesp.br/handle/11449/117185
dc.identifier10.1117/1.JBO.19.6.066012
dc.identifierWOS:000340432900019
dc.identifier0000-0002-3800-3050
dc.identifierhttp://dx.doi.org/10.1117/1.JBO.19.6.066012
dc.identifier.urihttp://repositorioslatinoamericanos.uchile.cl/handle/2250/927832
dc.descriptionIn part I of the study, two attachment systems [O-ring; bar-clip (BC)] were used, and the system with three individualized O-rings provided the lowest stress on the implants and the support tissues. Therefore, the aim of this study was to assess the stress distribution, through the photoelastic method, on implant-retained palatal obturator prostheses associated with different attachment systems: BOC-splinted implants with a bar connected to two centrally placed O-rings, and BOD-splinted implants with a BC connected to two distally placed O-rings (cantilever). One photoelastic model of the maxilla with oral-sinus-nasal communication with three parallel implants was fabricated. Afterward, two implant-retained palatal obturator prostheses with the two attachment systems described above were constructed. Each assembly was positioned in a circular polariscope and a 100-N axial load was applied in three different regions with implants by using a universal testing machine. The results were obtained through photograph record analysis of stress. The BOD system exhibited the highest stress concentration, followed by the BOC system. The O-ring, centrally placed on the bar, allows higher mobility of the prostheses and homogeneously distributes the stress to the region of the alveolar ridge and implants. It can be concluded that the use of implants with O-rings, isolated or connected with a bar, to rehabilitate maxillectomized patients allows higher prosthesis mobility and homogeneously distributes the stress to the alveolar ridge region, which may result in greater chewing stress distribution to implants and bone tissue. The clinical implication of the augmented bone support loss after maxillectomy is the increase of stress in the attachment systems and, consequently, a higher tendency for displacement of the prosthesis. (C) 2014 Society of Photo-Optical Instrumentation Engineers (SPIE).
dc.descriptionConselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)
dc.descriptionFundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)
dc.languageeng
dc.publisherSpie-soc Photo-optical Instrumentation Engineers
dc.relationJournal Of Biomedical Optics
dc.rightsinfo:eu-repo/semantics/closedAccess
dc.subjectphotoelastic imaging
dc.subjectdental implant
dc.subjectpalatal obturators
dc.subjectmaxillofacial prosthesis
dc.titleStress analysis in oral obturator prostheses, part II: photoelastic imaging
dc.typeOtro


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