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Analysis on Force Distribution of a Posterior Cantilever Fixed, Partial Denture by means of Electronic Speckle Pattern Interferometry

Li Yingxin Deng Yan Stomatological Hospital of China Medical University (Shenyang 110002)Dong Benhan Gao Pengfei Shenyang Aeroengine Research Institute  
For the first time, Electronic Speckle Pattern Interferometry was introduced in this study. The purpose of this study was to analyze the force distribution on the surface of the supporting bone of the abutment teeth with a mandibular posterior cantilever fixed partial denture. By means of Electronic Speckle Pattern Interferometry, four kinds of vertical loadings were exerted on the mandibular teeth before and after a posterior cantilever fixed partial denture treatment respectively. The real-time Electronic Speckle Interference Pattern was recorded photographically and the corresponding out of plane displacement of the supporting bone was measured. The change of this out of plane displacement of the supporting bone and the effect of loadings on it were analyzed. The results showed that a posterior cantilever fixed partial denture contributed to transmiss the stress and after a posterior cantilever fixed partial denture treatment, the out of plane displacement of supporting bone decreased significanlty. This study, provided a biomechanical reference for a cantilever fixed partial denture design.
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