2018 Fiscal Year Final Research Report
Elucidation of mechanism about alleviation effect of fatigue and pain by mouthguard wearing
| Project/Area Number |
15K11203
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Multi-year Fund |
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| Section | 一般 |
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| Research Field |
Prosthodontics/ Dental materials science and
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| Research Institution | Nihon University |
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Principal Investigator |
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| Co-Investigator(Kenkyū-buntansha) |
成田 紀之 日本大学, 松戸歯学部, 客員教授 (10155997)
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| Project Period (FY) |
2015-04-01 – 2019-03-31
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| Keywords | マウスガード / 筋疲労 / 筋痛み / 平均周波数 / 筋活動 / 筋電図 / ｆMRI / 咬合様相 |
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| Outline of Final Research Achievements |
The wearing of the mouthguard improves the occlusal contact area. It is inferred that the stimulation to the brain from baroreceptors of the teeth in the periphery increased, and the activity of the nerve motor unit and synchronization occurred.Therefore, it is presumed that the mass activity of the masseter muscle has increased.It showed significant activity that clenching by wearing a mouthguard is significant for primary motor area (M1), premotor area (PMo), supplementary motor area (SMC), middle cingulate cortex (MCC), and posterior cingulate cortex (PCC) from the results of fMRI.
It is considered that enhancement of motor cortex activity by MG in this study may limit senses of fatigue and pain via motor cortex activatious by wearing of the mouthguard.
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| Free Research Field |
歯科補綴
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| Academic Significance and Societal Importance of the Research Achievements |
マウスガードの装着による効果は，スポーツプレー中に生じる外力の衝撃を吸収することにより，歯や顎の骨の外傷だけでな，脳震盪の予防，さらに，運動能力が向上するなど，マウスガードの装着効果が期待されている。
コンタクトスポーツでは，外力に対して頭部を固定し体幹を安定させるため噛みしめを必要とすることは十分に想定される。マウスガードの装着による噛みしめが，歯の破折による精神的ストレスを軽減し，安定した噛み合わせにより，スポーツ競技中に生じる噛みしめによる顎の筋肉の痛みや疲労の自覚を軽減させ，スポーツパフォーマンスを向上させる。
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