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Journal of Biomedical Optics

Photoelastic analysis to compare implant-retained and conventional obturator dentures
Author(s): Marcelo C. Goiato; Paula do Prado Ribeiro; Eduardo P. Pellizzer; Aldieris A. Pesqueira; Marcela Filie Haddad; Daniela M. dos Santos; Amalia Moreno
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Paper Abstract

The use of photoelastic analysis contributes to the rehabilitation of patients with oral-sinus-nasal sequelae, which in turn affect important functions such as chewing, swallowing, and speech. The prosthetic rehabilitation with implant-retained dentures is a suitable treatment option. The purpose of this study was to verify, by using a photoelastic analysis, the stress distribution in implant-retained palatal obturator dentures (relined or not) associated with different attachment systems (O-ring, bar-clip, and bar-clip associated with distally placed O-rings). Two photoelastic models were obtained from an experimental maxillary cast presenting an oral-nasal communication. One model had two 13-mm length implants placed on the left region. A total of eight colorless maxillary obturators were fabricated and subsequently four of them were relined with soft silicone soft, and three had attachment systems associated. The assembly (model/attachment system/prosthesis) was positioned in a circular polariscope and a 100-N load was applied at 10  mm/s. The results showed that the denture relining influenced the distribution and amount of stress on the models. The O-ring group displayed the lowest stress levels, followed by bar-clip system associated with distally placed O-rings and bar-clip groups.

Paper Details

Date Published: 21 May 2012
PDF: 5 pages
J. Biomed. Opt. 17(6) 061203 doi: 10.1117/1.JBO.17.6.061203
Published in: Journal of Biomedical Optics Volume 17, Issue 6
Show Author Affiliations
Marcelo C. Goiato, Univ. Estadual Paulista (Brazil)
Paula do Prado Ribeiro, Univ. Estadual Paulista (Brazil)
Eduardo P. Pellizzer, Univ. Estadual Paulista (Brazil)
Aldieris A. Pesqueira, Univ. Estadual Paulista (Brazil)
Marcela Filie Haddad, Univ. Estadual Paulista (Brazil)
Daniela M. dos Santos, Univ. Estadual Paulista (Brazil)
Amalia Moreno, Univ. Estadual Paulista (Brazil)

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