Pesqueira, Aldieris Alves [UNESP]Goiato, Marcelo Coelho [UNESP]Santos, Daniela Micheline dos [UNESP]Haddad, Marcela Filié [UNESP]Andreotti, Agda Marobo [UNESP]Moreno, Amália [UNESP]2014-05-272014-05-272013-07-08Journal of Biomedical Optics, v. 18, n. 6, 2013.1083-36681560-2281http://hdl.handle.net/11449/75924Maxillary defects resulting from cancer, trauma, and congenital malformation affect the chewing efficiency and retention of dentures in these patients. The use of implant-retained palatal obturator dentures has improved the self-esteem and quality of life of several subjects. We evaluate the stress distribution of implant-retained palatal obturator dentures with different attachment systems by using the photoelastic analysis images. Two photoelastic models of the maxilla with oral-sinus-nasal communication were fabricated. One model received three implants on the left side of the alveolar ridge (incisive, canine, and first molar regions) and the other did not receive implants. Afterwards, a conventional palatal obturator denture (control) and two implant-retained palatal obturator dentures with different attachment systems (O-ring; bar-clip) were constructed. Models were placed in a circular polariscope and a 100-N axial load was applied in three different regions (incisive, canine, and first molar regions) by using a universal testing machine. The results were photographed and analyzed qualitatively using a software (Adobe Photoshop). The bar-clip system exhibited the highest stress concentration followed by the O-ring system and conventional denture (control). Images generated by the photoelastic method help in the oral rehabilitator planning. © 2013 SPIE.engdental implantmaxillectomyphotoelasticityAdobe PhotoshopCircular polariscopeCongenital malformationsPhoto-elastic analysisPhotoelastic methodPhotoelastic modelsUniversal testing machinesO ringsPhotoelasticityStress analysisStress concentrationDental prosthesesdental procedureelasticitymaxillofacial prosthesismechanical stresspalatal obturatorphotographyprosthesisDental ModelsElasticityMaxillofacial ProsthesisPalatal ObturatorsPhotographyProsthesis DesignStress, MechanicalArtigo10.1117/1.JBO.18.6.061203WOS:000322341100011Acesso aberto2-s2.0-848758102622-s2.0-84875810262.pdf97198838148725820000-0002-3800-3050