Researchers from State University Report Recent Findings in Bone Research (Stress analysis in oral obturator prostheses, part II: photoelastic imaging)
By a News Reporter-Staff News Editor at Biotech Week -- Investigators publish new report on Bone Research. According to news reporting originating in Aracatuba, Brazil, by NewsRx journalists, research stated, "In part I of the study, two attachment systems [O-ring; bar-clip (BC)] were used, and the system with three individualized O-rings provided the lowest stress on the implants and the support tissues. Therefore, the aim of this study was to assess the stress distribution, through the photoelastic method, on implant-retained palatal obturator prostheses associated with different attachment systems: BOC--splinted implants with a bar connected to two centrally placed O-rings, and BOD--splinted implants with a BC connected to two distally placed O-rings (cantilever)."
The news reporters obtained a quote from the research from State University, "One photoelastic model of the maxilla with oral-sinus-nasal communication with three parallel implants was fabricated. Afterward, two implant-retained palatal obturator prostheses with the two attachment systems described above were constructed. Each assembly was positioned in a circular polariscope and a 100-N axial load was applied in three different regions with implants by using a universal testing machine. The results were obtained through photograph record analysis of stress. The BOD system exhibited the highest stress concentration, followed by the BOC system. The O-ring, centrally placed on the bar, allows higher mobility of the prostheses and homogeneously distributes the stress to the region of the alveolar ridge and implants. It can be concluded that the use of implants with O-rings, isolated or connected with a bar, to rehabilitate maxillectomized patients allows higher prosthesis mobility and homogeneously distributes the stress to the alveolar ridge region, which may result in greater chewing stress distribution to implants and bone tissue."
According to the news reporters, the research concluded: "The clinical implication of the augmented bone support loss after maxillectomy is the increase of stress in the attachment systems and, consequently, a higher tendency for displacement of the prosthesis."
For more information on this research see: Stress analysis in oral obturator prostheses, part II: photoelastic imaging. Journal of Biomedical Optics, 2014;19(6):066012 (see also Bone Research).
Our news correspondents report that additional information may be obtained by contacting A.A. Pesqueira, University Estadual Paulista, Aracatuba Dental School, Dept. of Dental Materials and Prosthodontics, Aracatuba 16015-050, SP, Brazil. Additional authors for this research include M.C. Goiato, E.V. da Silva, M.F. Haddad, A. Moreno, A. Zahoui and D.M dos Santos.
Keywords for this news article include: Brazil, Aracatuba, South America, Bone Research.
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