| Stress analysis in oral obturator prostheses: imaging photoelastic. | |
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MedLine Citation:
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PMID: 23143194 Owner: NLM Status: In-Data-Review |
Abstract/OtherAbstract:
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ABSTRACT. Maxillary 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. |
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Authors:
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Aldiéris Alves Pesqueira; Marcelo Coelho Goiato; Daniela Micheline Dos Santos; Marcela Filié Haddad; Agda Marobo Andreotti; Amália Moreno |
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Publication Detail:
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Type: Journal Article |
Journal Detail:
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Title: Journal of biomedical optics Volume: 18 ISSN: 1560-2281 ISO Abbreviation: J Biomed Opt Publication Date: 2013 Jun |
Date Detail:
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Created Date: 2012-11-12 Completed Date: - Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 9605853 Medline TA: J Biomed Opt Country: United States |
Other Details:
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Languages: eng Pagination: 61203 Citation Subset: IM |
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From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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