| Project/Area Number |
19791465
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| Research Category |
Grant-in-Aid for Young Scientists (B)
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| Allocation Type | Single-year Grants |
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| Research Field |
補綴理工系歯学
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| Research Institution | Nihon University |
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Principal Investigator |
ASANO Takashi Nihon University, 松戸歯学部, 講師 (60349975)
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| Project Period (FY) |
2007 – 2009
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| Project Status |
Completed (Fiscal Year 2009)
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| Budget Amount *help |
¥2,000,000 (Direct Cost: ¥1,700,000、Indirect Cost: ¥300,000)
Fiscal Year 2009: ¥650,000 (Direct Cost: ¥500,000、Indirect Cost: ¥150,000)
Fiscal Year 2008: ¥650,000 (Direct Cost: ¥500,000、Indirect Cost: ¥150,000)
Fiscal Year 2007: ¥700,000 (Direct Cost: ¥700,000)
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| Keywords | マウスガード / 咀嚼筋 / 筋活動 / 身体運動能力 / レジスタンストレーニング / 体幹の伸展・屈曲運動 / 多用途筋機能評価訓練装置 / 顆頭位および切歯点運動 / 3D超音波ナビゲーター / 開口筋 / 閉口筋 / 切歯点 / 全運動軸点 |
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| Research Abstract |
Generally, although the mandible is considered to be fixed during body movement, its dynamics have not been clarified. In this study, we investigated the condylar movement pattern in extension/flexion movement of the body trunk. healthy dentulous subjects performed extension/flexion movement of the body trunk using a multipurpose muscle function training system. The condylar and incisal point movement patterns were measured using a jaw movement analyzer and 3D ultrasonic navigator. The maximum displacements of the condylar and incisal points in mouth opening were measured. The relative percentages of the condylar point displacements in extension/flexion of the body trunk to the maximum displacements were calculated, and displacements in the anterior, and posterior, superior, and inferior directions were compared. Based on the above findings, the mandible is not fixed at the intercuspal position by clenching, but displaced during muscle force exertion by the body trunk.
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