Goiato, Marcelo Coelho [UNESP]Ribeiro, Paula do Prado [UNESP]Pellizzer, Eduardo Piza [UNESP]Pesqueira, Aldieris Alves [UNESP]Haddad, Marcela Filie [UNESP]Santos, Daniela Micheline dos [UNESP]Moreno, Amalia [UNESP]2013-09-302014-05-202013-09-302014-05-202012-06-01Journal of Biomedical Optics. Bellingham: Spie-soc Photo-optical Instrumentation Engineers, v. 17, n. 6, p. 4, 2012.1083-3668http://hdl.handle.net/11449/15361The 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. (C) 2012 Society of Photo-Optical Instrumentation Engineers (SPIE). [DOI: 10.1117/1.JBO.17.6.061203]4engdental implantmaxillectomyphotoelasticdenture linersArtigo10.1117/1.JBO.17.6.061203WOS:000305582500010Acesso abertoWOS000305582500010.pdf971988381487258255813641935255000000-0002-3800-3050