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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Stress analysis in oral obturator prostheses over parallel and tilted implants: photoelastic imaging

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Author(s):
Pesqueira, Aldieris Alves [1] ; Goiato, Marcelo Coelho [2] ; dos Santos, Daniela Micheline [2] ; Nobrega, Adhara Smith [2] ; Haddad, Marcela Filie [2] ; Andreotti, Agda Marobo [2] ; Moreno, Amalia [2]
Total Authors: 7
Affiliation:
[1] Univ Sagrado Coracao, Fac Dent, Dept Oral Biol, Sao Paulo - Brazil
[2] Univ Estadual Paulista, Aracatuba Dent Sch, Dept Dent Mat & Prosthodont, Sao Paulo - Brazil
Total Affiliations: 2
Document type: Journal article
Source: Journal of Biomedical Optics; v. 18, n. 10 OCT 2013.
Web of Science Citations: 3
Abstract

This study aimed to evaluate the stress distribution through the photoelastic method in implant-retained palatal obturators prostheses. Two photoelastic models with bucco-sinusal communication were fabricated, one model without implants and another with two parallel implants and one tilted in the molar region. A conventional obturator prosthesis and five implant-retained obturators dentures with different attachment systems were fabricated: OR, three individualized O-rings; BC, bar clip; BOC, implants splinted by bars associated with two O-rings positioned at the center of the bar; OD, implants splinted by bars associated with two O-rings positioned in distal cantilever; and BOD, implants splinted by bars with clips associated with two O-rings positioned in distal cantilever. Each assembly (model/attachment system/prosthesis) was positioned in a circular polariscope and a load of 100 N was applied on each implant. The results were obtained by observing the photographic record of the tensions in the photoelastic models resulting from the application of load. It can be observed that a larger amount of stress fringes on BC system. It was concluded that the attachment system has a direct influence on the stress distribution of implant-retained obturator prostheses, with the three individualized O-rings exhibiting the lowest stress values, and tilted implants presented a biomechanical behavior similar to parallel implants. (C) The Authors. (AU)

FAPESP's process: 10/01241-3 - Photoelastic analysis of the stress on implant-retained palatal obturated prostheses, with parallel and inclined implants associated to different retention systems
Grantee:Marcelo Coelho Goiato
Support Opportunities: Regular Research Grants