Relation between stress and masticatory muscle activities associated with oral habits

• Project/Area Number: 25861848
• Research Category: Grant-in-Aid for Young Scientists (B)
• Allocation Type: Multi-year Fund
• Research Field: Prosthodontics/ Dental materials science and
• Research Institution: The University of Tokushima
• Principal Investigator: TAKATA Nami 徳島大学, 病院, 診療支援医師 (30643803)
• Project Period (FY): 2013-04-01 – 2016-03-31
• Project Status: Completed (Fiscal Year 2015)
• Budget Amount: ¥3,510,000 (Direct Cost: ¥2,700,000、Indirect Cost: ¥810,000); Fiscal Year 2015: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000); Fiscal Year 2014: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000); Fiscal Year 2013: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
• Keywords: ストレス / 咀嚼筋活動 / ブラキシズム

Outline of Final Research Achievements

Nine adult volunteers (7 males and 2 females mean age 23.6 ± 3.5 year old)with no impairment of stomatognathic function were participated in this study. Their surface EMG of the masseter muscle was recorded with a portable EMG logging device for about 24 hours.We detected and classified non-unctional masseter muscle activities during awake and sleep bruxism as clenching, grinding, and mixed by using the same detection and classification criteria.　The frequency, maximum masseter muscle activity, and duration of were compared between awake and sleep bruxism events. The awake bruxism events were significantly more frequent than the sleep bruxism events. There were no significant differences in the maximum masseter muscle activity and duration between the awake and sleep bruxism events. As a result this study, we revealed the characteristic nonfunctional masseter muscle activity patterns during the awake bruxism in the healthy adults.

Research Products

• [Journal Article] A preliminary investigation of reproducibility of EMG signals during daytime masticatory muscle activity using a portable EMG logging device (2015)
  • Author(s): Omoto K, Shigemoto S, Suzuki Y, Nakamura M, Okura K, Nishigawa K, Goto N, Omar M R and Matsuka Y
  • Journal Title: Journal of Electromyography and Kinesiology Volume: 印刷中
  • Peer Reviewed / Acknowledgement Compliant
• [Presentation] Masseter muscle activity during awake / sleep state with all day EMG recording (2014)
  • Author(s): Omoto K, Shigemoto S, Iwata K, Kurogoshi R, Goto N, Suzuki Y, Okura K and Matsuka Y
  • Organizer: The ASEAN Plus and Tokushima Joint International Conference
  • Place of Presentation: Makassar (Indonesia)
  • Year and Date: 2014-12-04
• [Presentation] 連続 24 時間筋電図記録による覚醒時と睡眠時の咬筋活動の比較 (2014)
  • Author(s): 大本 勝弘, 重本 修伺, 後藤 奈美, 鈴木 善貴, 上枝 麻友, 髙橋 陽光, 松香 芳三
  • Organizer: 123回日本補綴歯科学会
  • Place of Presentation: 仙台国際センター（宮城県仙台市）
  • Year and Date: 2014-05-24 – 2014-05-25
• [Presentation] 携帯型筋電計測定による覚醒時と睡眠時の筋活動比較 (2014)
  • Author(s): 大本勝弘 ,岩田こころ , 黒厚子璃佳 , 鈴木善貴 , 高田奈美 , 重本 修伺, 松香 芳三
  • Organizer: 四国歯学会第44回例会
  • Place of Presentation: 徳島大学歯学部（徳島県徳島市）
• [Presentation] Classification of Jaw Movement Patterns During Associated Bruxism (2013)
  • Author(s): Shuji Shigemoto, Yoshitaka Suzuki, Nami Takata and Yoshizo Matsuka
  • Organizer: 15th Meeting of the International College of Proshodontists
  • Place of Presentation: Centro Congressi Lingotto (Torino, Italy)
• [Presentation] The analysis of jaw movements at peak Masseter Muscle Activities of Rhythmic Masticatory Muscle Activity Events During Sleep (2013)
  • Author(s): Yoshitaka Suzuki, Shuji Shigemoto, Nami Takata and Yoshizo Matsuka
  • Organizer: 15th Meeting of the International College of Proshodontists
  • Place of Presentation: Centro Congressi Lingotto (Torino, Italy)
• [Presentation] 日中の咬筋活動様式 (2013)
  • Author(s): 大本 勝弘, 重本 修伺, 高田 奈美, 鈴木 善貴, 大倉 一夫, 細木 眞紀, 田島 登誉子, 神原 佐知子, 松香 芳三
  • Organizer: 平成25年度日本補綴歯科学会 中国・四国支部学術大会
  • Place of Presentation: 総合あんしんセンター（高知県高知市）
• [Presentation] 睡眠時ブラキシズムのクレンチング時における顎位と咬筋活動の検討 (2013)
  • Author(s): 鈴木 善貴, 重本 修伺, 大倉 一夫, 野口 直人, 安陪 晋, 大本 勝弘, 神原 佐知子, 高田 奈美, 中野 雅德, 坂東 永一, 松香 芳三
  • Organizer: 日本補綴歯科学会第122回学術大会
  • Place of Presentation: 福岡国際会議場（福岡県福岡市博多区）