| Project/Area Number |
12680830
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
Biomedical engineering/Biological material science
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| Research Institution | Osaka University |
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Principal Investigator |
TANAKA Masao Osaka University, Graduate School of Engineering Science, Professor, 大学院・基礎工学研究科, 教授 (40163571)
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| Co-Investigator(Kenkyū-buntansha) |
TANAKA Eiji Hiroshima University, Dental School, Associate Professor, 歯学部, 助教授 (40273693)
TODAH Masahiro Osaka University, Graduate School of Engineering Science, Research Associate, 大学院・基礎工学研究科, 助手 (10314402)
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| Project Period (FY) |
2000 – 2001
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| Project Status |
Completed (Fiscal Year 2001)
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| Budget Amount *help |
¥3,800,000 (Direct Cost: ¥3,800,000)
Fiscal Year 2001: ¥1,100,000 (Direct Cost: ¥1,100,000)
Fiscal Year 2000: ¥2,700,000 (Direct Cost: ¥2,700,000)
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| Keywords | Biomechanics / Computational Mechanics / Individual modeling / Temporomandibular joint |
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| Research Abstract |
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
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