• Search Research Projects
  • Search Researchers
  • How to Use
  1. Back to previous page

Diagnosis of awake bruxism by EMA and EMG

Research Project

Project/Area Number 21K10007
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Review Section Basic Section 57050:Prosthodontics-related
Research InstitutionMeikai University

Principal Investigator

Fujisawa Masanori  明海大学, 歯学部, 教授 (00209040)

Co-Investigator(Kenkyū-buntansha) 三浦 賞子  明海大学, 歯学部, 准教授 (60431590)
勅使河原 大輔  明海大学, 歯学部, 講師 (70779016)
Project Period (FY) 2021-04-01 – 2024-03-31
Project Status Completed (Fiscal Year 2023)
Budget Amount *help
¥4,160,000 (Direct Cost: ¥3,200,000、Indirect Cost: ¥960,000)
Fiscal Year 2023: ¥780,000 (Direct Cost: ¥600,000、Indirect Cost: ¥180,000)
Fiscal Year 2022: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000)
Fiscal Year 2021: ¥2,470,000 (Direct Cost: ¥1,900,000、Indirect Cost: ¥570,000)
Keywords覚醒時ブラキシズム / 生態学的瞬間評価 / 筋電図 / カットオフ値 / ROC曲線
Outline of Research at the Start

覚醒時ブラキシズムの診断基準設定の根拠となる検査方法を確立することを目的として、筋電計により覚醒時の咀嚼筋筋活動を記録するとともに、自身の自覚を正確に記録する手法である生態学的瞬間評価を併用することにより覚醒時ブラキシズムの認識を同時に記録し、両データを照合することにより、覚醒時ブラキシズムの診断基準を設定する根拠データを提示する。

Outline of Final Research Achievements

To find the suitable parameter for awake bruxism determination, the masticatory muscle EMG activity during awake time together with the ecological momentary assessment (EMA) of the bruxism event were recorded simultaneously in the bruxism (BR) group (n=50) and the control (CO) group (n=50).
The receiver operating characteristic (ROC) curve was obtained. The maximum voluntary contraction (MVC) at the time of maximum bite force was set as 100 %, and the muscle activity was evaluated as a relative value. The assessed parameter combined the EMG and the EMA allowed to obtain the cut-off point that enabled to distinguish the BR group and the CO group. As a result, the area under the ROC curve was 0.77 and the cut-off point was 3.2 events / h under the EMG of 20% MVC with duration of 1s or longer.

Academic Significance and Societal Importance of the Research Achievements

日中に生じる覚醒時ブラキシズム(AB)による顎関節症,筋疲労等による弊害が知られているが,検査法や評価基準など多くの面で未だコンセンサスを得られるには至っていない.筋電図単独による評価では,食事や会話などの機能運動時の波形も含まれることから,機能運動の影響を受けにくくかつ検出力の高い評価基準を検証することを目的とした.本研究は生態学的瞬間評価との同時記録を行った初めての報告であり,ABの検査に有効なパラメータが得られたことから,筋電図バイオフィードバックによる治療や予防に貢献できるデータを提供できたと考える.ストレス社会におけるマネージメントへの応用も期待できる.

Report

(4 results)
  • 2023 Annual Research Report   Final Research Report ( PDF )
  • 2022 Research-status Report
  • 2021 Research-status Report
  • Research Products

    (14 results)

All 2023 2022 2021

All Journal Article (5 results) (of which Int'l Joint Research: 4 results,  Peer Reviewed: 4 results,  Open Access: 4 results) Presentation (9 results) (of which Int'l Joint Research: 2 results,  Invited: 5 results)

  • [Journal Article] Assessment of awake bruxism—Combinational analysis of ecological momentary assessment and electromyography—2023

    • Author(s)
      Asami Kazuya、Fujisawa Masanori、Saito-Murakami Konatsu、Miura Shoko、Fujita Takafumi、Imamura Yoshiki、Koyama Shiho
    • Journal Title

      Journal of Prosthodontic Research

      Volume: 68 Issue: 1 Pages: 166-171

    • DOI

      10.2186/jpr.JPR_D_22_00289

    • ISSN
      1883-1958, 1883-9207
    • Related Report
      2023 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] ブラキシズム24hours-睡眠時・覚醒時ブラキシズムの検査・診断法-. 日中のブラキシズム-筋電図による検査とバイオフィードバック療法-2023

    • Author(s)
      村上小夏,浅見和哉,藤澤政紀
    • Journal Title

      歯界展望

      Volume: 141 Pages: 1095-1103

    • Related Report
      2023 Annual Research Report
  • [Journal Article] Prosthodontic treatment can improve the ingestible food profile in Japanese adult outpatients2023

    • Author(s)
      A Kimura-Ono, K Maekawa, T Kuboki, K Nawachi, M Fujisawa, et al.
    • Journal Title

      Journal of Prosthodontic Research

      Volume: 67 Issue: 2 Pages: 189-195

    • DOI

      10.2186/jpr.JPR_D_22_00017

    • ISSN
      1883-1958, 1883-9207
    • Related Report
      2022 Research-status Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Managements of sleep bruxism in adult: A systematic review2022

    • Author(s)
      Minakuchi Hajime、Fujisawa Masanori、Abe Yuka、Iida Takashi、Oki Kyosuke、Okura Kazuo、Tanabe Norimasa、Nishiyama Akira
    • Journal Title

      Japanese Dental Science Review

      Volume: 58 Pages: 124-136

    • DOI

      10.1016/j.jdsr.2022.02.004

    • Related Report
      2022 Research-status Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Impact of number of functional teeth on independence of Japanese older adults2022

    • Author(s)
      K Maekawa, T Ikeuchi, S Shinkai, H Hirano, M Fujisawa, et al.
    • Journal Title

      Geriatrics & Gerontology International

      Volume: - Issue: 12 Pages: 1032-1039

    • DOI

      10.1111/ggi.14508

    • Related Report
      2022 Research-status Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Presentation] Effect of daytime biofeedback on sleep bruxism2023

    • Author(s)
      Fujisawa M
    • Organizer
      101th International Association for Dental Research
    • Related Report
      2023 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] Challenge to Bruxism -Management by daytime biofeedback and Prosthodontic approach to severe Bruxers2023

    • Author(s)
      Fujisawa M
    • Organizer
      Korean Academy of Stomatognathic Function and Occlusion
    • Related Report
      2023 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] 顎関節症と咬合を再考する コホート調査からみた顎関節症と咬合因子2023

    • Author(s)
      藤澤政紀
    • Organizer
      第36回日本顎関節学会総会・学術大会
    • Related Report
      2023 Annual Research Report
    • Invited
  • [Presentation] 筋電図と生態学的瞬間評価の組合せによる覚醒時ブラキシズムの評価2023

    • Author(s)
      浅見和哉、藤澤政紀
    • Organizer
      第36回日本顎関節学会総会・学術大会
    • Related Report
      2023 Annual Research Report
  • [Presentation] 生態学的瞬間評価と筋電図を組合せた覚醒時ブラキシズムの評価2022

    • Author(s)
      浅見和哉,村上小夏,三浦寛貴,小山志保,藤澤政紀
    • Organizer
      日本顎口腔機能学会 第67回学術大会
    • Related Report
      2022 Research-status Report
  • [Presentation] ブラキシズム24h ー覚醒時ブラキシズムの検査と評価ー2022

    • Author(s)
      藤澤政紀
    • Organizer
      第35回一般社団法人日本顎関節学会総会・ 学術大会
    • Related Report
      2022 Research-status Report
    • Invited
  • [Presentation] 生態学的瞬間評価と筋電図による覚醒時ブラキシズムの診断2021

    • Author(s)
      浅見和哉,村上小夏,佐藤雅介,大塚英稔,藤澤政紀
    • Organizer
      第130回日本補綴歯科学会 学術大会
    • Related Report
      2021 Research-status Report
  • [Presentation] 補綴医に必要な覚醒時ブラキシズムの検査と診断 筋電図で診る覚醒時ブラキシズム -PPDのDが問題です-2021

    • Author(s)
      藤澤政紀
    • Organizer
      第130回日本補綴歯科学会 学術大会
    • Related Report
      2021 Research-status Report
    • Invited
  • [Presentation] 頭頸部深層屈曲筋力が嚥下機能に及ぼす影響2021

    • Author(s)
      三浦寛貴, 村上小夏, 浅見和哉, 藤澤政紀
    • Organizer
      顎口腔機能学会第66回学術大会
    • Related Report
      2021 Research-status Report

URL: 

Published: 2021-04-28   Modified: 2025-01-30  

Information User Guide FAQ News Terms of Use Attribution of KAKENHI

Powered by NII kakenhi