Patient specific indibidual computational bio-mechanics of temporomandibular joint system and application to temporomandibular disorder examination

点击翻译按钮获取中文摘要

1. The methodology for establishing patient-specific individual modeling was developed for temporomandibular joints based on magnetic resonance images available at medical examination, and a prototype modeling system has been demonstrated for the clinical dental researchers.2. The jaw bone movement was reconstructed interpolating the jaw bone position observed by magnetic resonance images at different mouth opening stages of individual subject. It gives us a rationale to determine the typical jaw movement condition used for the computational biomechanics analysis of temporomandibular joints.3. Stress analysis concerning on the soft tissue components of articular disc and surrounding connective tissue have showed that normal temporomandibular joints exhibited the high stress region at the anteromedial portion of the articular disc and that permanently anterior-disc-displaced temporomandibular joint resulted the relatively high stress in retrodiscal connective tissue in which tissue liga … More mentization was observed.4. Stress redistribution and tentative displacement in articular disc was very dependent not only on irregular spatial arrangement of components of anterior-disc-displaced temporomandibular joint but also on biomechanical property of articular disc and retrodiscal connective tissue. This fact suggested us the importance of biomechanical tests of retorodiscal connective tissue as well as articular disc.5. Indiyidual computational biomechanics analysis revealed that the tentative articular disc displacement in anterior direction due to the mouth opening was dependent on the elastic modulus of the articular disc in the case of normal temporomandibular joints, while the disc displacement was dependent on the elastic modulus of the retrodiscal tissue in the case of permanently anterior-disc-displaced joints. This feet showed the possibility to estimate the mechanical property of soft tissue components by comparing tentative disc displacement by image analysis and that by computational biomechanics analysis. Less