Special Section on Photoacoustic Imaging and Sensing

Photoelastic analysis to compare implant-retained and conventional obturator dentures

[+] Author Affiliations
Marcelo Coelho Goiato, Paula do Prado Ribeiro, Eduardo Piza Pellizzer, Aldiéris Alves Pesqueira, Marcela Filiè Haddad, Daniela Micheline dos Santos, Amália Moreno

UNESP, Araçatuba Dental School, Department of Dental Materials and Prosthodontics, São Paulo 16015-050, Brazil

J. Biomed. Opt. 17(6), 061203 (May 21, 2012). doi:10.1117/1.JBO.17.6.061203
History: Received July 29, 2011; Revised September 22, 2011; Accepted September 26, 2011
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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 10mm/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.

Figures in this Article
© 2012 Society of Photo-Optical Instrumentation Engineers

Citation

Marcelo Coelho Goiato ; Paula do Prado Ribeiro ; Eduardo Piza Pellizzer ; Aldiéris Alves Pesqueira ; Marcela Filiè Haddad, et al.
"Photoelastic analysis to compare implant-retained and conventional obturator dentures", J. Biomed. Opt. 17(6), 061203 (May 21, 2012). ; http://dx.doi.org/10.1117/1.JBO.17.6.061203


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