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

Aldieris A. Pesqueira; Marcelo Coelho Goiato; Daniela M. dos Santos; Adhara S. Nobrega; Marcela F. Haddad; Agda M. Andreotti; Amalia Moreno

doi:10.1117/1.JBO.18.10.106009

15 October 2013 Stress analysis in oral obturator prostheses over parallel and tilted implants: photoelastic imaging

Aldieris A. Pesqueira, Marcelo Coelho Goiato, Daniela M. dos Santos, Adhara S. Nobrega, Marcela F. Haddad, Agda M. Andreotti, Amalia Moreno

Author Affiliations +

Funded by: State of São Paulo Research Foundation—FAPESP

Journal of Biomedical Optics, Vol. 18, Issue 10, 106009 (October 2013). https://doi.org/10.1117/1.JBO.18.10.106009

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.

CC BY: © The Authors. Published by SPIE under a Creative Commons Attribution 4.0 Unported License. Distribution or reproduction of this work in whole or in part requires full attribution of the original publication, including its DOI.

Citation Download Citation

Aldieris A. Pesqueira, Marcelo Coelho Goiato, Daniela M. dos Santos, Adhara S. Nobrega, Marcela F. Haddad, Agda M. Andreotti, and Amalia Moreno "Stress analysis in oral obturator prostheses over parallel and tilted implants: photoelastic imaging," Journal of Biomedical Optics 18(10), 106009 (15 October 2013). https://doi.org/10.1117/1.JBO.18.10.106009

Published: 15 October 2013

ACCESS THE FULL ARTICLE

JOURNAL ARTICLE
6 PAGES

DOWNLOAD PAPER SAVE TO MY LIBRARY