| Project/Area Number |
14580829
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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 | KITASATO UNIVERSITY |
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Principal Investigator |
MABUCHI Kiyoshi Kitasato University, School of Allied Health Sciences, Professor, 医療衛生学部, 教授 (70118842)
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| Project Period (FY) |
2002 – 2003
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| Project Status |
Completed (Fiscal Year 2003)
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| Budget Amount *help |
¥3,700,000 (Direct Cost: ¥3,700,000)
Fiscal Year 2003: ¥1,100,000 (Direct Cost: ¥1,100,000)
Fiscal Year 2002: ¥2,600,000 (Direct Cost: ¥2,600,000)
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| Keywords | Biotribology / Knee joint / Temporomandibular joint / Osteoarthritis / Friction / Lubrication / Robotics |
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| Research Abstract |
It is generally accepted that occlusion failure must cause the degeneration of temporomandibular joints. Lubrication mechanism of joints can be disturbed because of lopsided contact position. The relationship between the level of occlusion failiure and the joint function has not been quantitatively clarified, yet. Porcine temporomandibular joints were used for the experiment. A system for measuring joint friction was designed using a robotic arm, a universal force sensor and a personal computer. Friction between the maxilla and the mandible was measured under the various conditions of occlusion. Additionally, the occlusion conditions were assessed by the distribution of contact pressure, which was measured by pressure sensitive films. The coefficient of friction increased from 0.04 to about 0.1 when the mandible moved to 3 mm external or internal position. In that case, high pressure area was concentrated to lateral side. As the results, it was found that lopsided occlusion of temporomandibular joints lowers the lubrication ability of articular cartilage with the rise in contact pressure.
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