Elucation of the mechanism of mouth guard on the body exercise function improvement

2015 Fiscal Year Final Research Report

• Project/Area Number: 25463026
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Research Field: Prosthodontics/ Dental materials science and
• Research Institution: Nihon University
• Principal Investigator: ASANO Takashi 日本大学, 松戸歯学部, 講師 (60349975)
• Co-Investigator(Kenkyū-buntansha): KAWARA Misao 日本大学, 松戸歯学部, 教授 (20147713) ; IIDA Takashi 日本大学, 松戸歯学部, 助教 (50453882) ; KOMIYAMA Osamu 日本大学, 松戸歯学部, 准教授 (60339223)
• Project Period (FY): 2013-04-01 – 2016-03-31
• Keywords: マウスガード / 咀嚼筋

Outline of Final Research Achievements

We measured the greatest and total work loads during trunk extension/flexion exercise with and without MG using a multi-purpose muscle function evaluation system in 9 healthy dentulous subjects. Simultaneously, the electromyographic activity patterns and maximum voluntary activities of the temporal, masseter, and digastric muscles were measured. Form obtained muscle activities, the relative percentage(%) of the activity of each masticatory muscle to its maximum voluntary activity was calculated, and masticatory muscle activities during trunk extension/flexion exercise were compared between with and without the use of MG.
Based on physical performance and electromyographic masticatory muscle activity patterns during exertion of trunk muscles, no improvement in physical performance was observed using MG.However, the use of MG was useful for reducing the activities of the masticatory muscles,particularly the digastric muscle.

Free Research Field

歯科補綴学