Elucidation of acutual state of awake bruxism in patients with temporomandibular disorders by using wearable electromyogram systems

• Project/Area Number: 21592441
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Single-year Grants
• Section: 一般
• Research Field: Prosthetic dentistry
• Research Institution: Hokkaido University
• Principal Investigator: YAMAGUCHI Taihiko 北海道大学, 北海道大学病院, 准教授 (90200617)
• Co-Investigator(Kenkyū-buntansha): OKADA Kazuki 北海道大学, 北海道大学病院, 助教 (70399856) ; SATOH Kaoru 北海道大学, 北海道大学病院, 助教 (40281828) ; KANEKO Tomoo 北海道大学, 北海道大学病院, 講師 (10241340) ; GOTOUDA Akihito 北海道大学, 北海道大学病院, 医員 (70466465)
• Project Period (FY): 2009 – 2011
• Project Status: Completed (Fiscal Year 2011)
• Budget Amount: ¥4,680,000 (Direct Cost: ¥3,600,000、Indirect Cost: ¥1,080,000); Fiscal Year 2011: ¥650,000 (Direct Cost: ¥500,000、Indirect Cost: ¥150,000); Fiscal Year 2010: ¥650,000 (Direct Cost: ¥500,000、Indirect Cost: ¥150,000); Fiscal Year 2009: ¥3,380,000 (Direct Cost: ¥2,600,000、Indirect Cost: ¥780,000)
• Keywords: 顎口腔機能 / ブラキシズム / 筋電図 / ウェアラブル / 顎関節症 / 覚醒時

Research Abstract

To clarify the actual state of awake bruxism in patients with temporomandibular disorders and nocturnal bruxism, we analyzed their masseteric activities in the daytime and nighttime. Total integral value of elctromyographic(EMG) activities of masseter muscles during awake state in the daytime except meal time was relatively small in healthy subjects. The value obtained in the patients with temporomandibular disorders and nocturnal bruxism was relatively large and almost equal to those in the total meal time. The masseteric EMG activities during awake states intermingled among the sleep stages in the nighttime accounted for considerable rate of nocturnal masseteric EMG activities. It was suggested that we should pay attention to muscle activities at awake states in the daytime and awake stages among sleep stages in the nighttime, as well as muscle activities during sleep stages, when we consider influences of bruxism on human organism and life.

Research Products

• [Presentation] Rhythmic Masticatory Muscle Activity(RMMA)とガム咀嚼時筋活動の比較 (2011)
  • Author(s): 松田慎平,山口泰彦,三上紗季,岡田和樹,後藤田章人,渡辺一彦
  • Organizer: 日本顎口腔機能学会第46回学術大会
  • Place of Presentation: 東北大学,仙台
  • Year and Date: 2011-05-28
• [Presentation] Measurement of masseteric activity using a wearable data logger type electromyogram system-Comparison with current electromyogram systems during daytime and nocturnal sleep- (2011)
  • Author(s): Watanabe K, Gotouda A, Yamaguchi T, Okada K, Mikami S, Matsuda S
  • Organizer: The 7th Biennial Congress of the Asian Academy of Prosthodontics
  • Place of Presentation: Shanghai, China
• [Presentation] 新たに導入したウェアラブル筋電図システムによる咬筋筋活動測定-覚醒時における従来型筋電計との比較- (2011)
  • Author(s): 渡辺一彦,山口泰彦,三上紗季,松田慎平,岡田和樹,後藤田章人,菱川龍樹,斉藤未来,佐藤華織,井上農夫男
  • Organizer: 日本顎関節学会第24回学術大会
  • Place of Presentation: 広島県民文化センター,広島
• [Presentation] Measurement of masseteric activity using a wearable data logger type electromyogram system-Comparison with current electromyogram systems during daytime and nocturnal sleep- (2011)
  • Author(s): Watanabe K, Gotouda A, Yamaguchi T, et, al
  • Organizer: The 7th Biennial Congress of the Asian Academy of Prosthodontics
  • Place of Presentation: The EXPO Theme Pavilion Shanghai (China)
• [Presentation] 終日咬筋活動測定のためのウェアラブル筋電図システム (2010)
  • Author(s): 渡辺一彦,山口泰彦,三上紗季,松田慎平,岡田和樹,後藤田章人
  • Organizer: 平成22年度社団法人日本補綴歯科学会
  • Place of Presentation: 北海道歯科医師会館,札幌
  • Year and Date: 2010-10-24
• [Presentation] 終日咬筋活動測定のためのウェアラブル筋電図システム (2010)
  • Author(s): 渡辺一彦, 山口泰彦, 三上紗季, 松田慎平, 岡田和樹, 後藤田章人
  • Organizer: 平成22年度 社団法人日本補綴歯科学会 東北・北海道支部学術大会
  • Place of Presentation: 北海道歯科医師会館(札幌市)
  • Year and Date: 2010-10-24