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Development of wearable real-time occlusal force measurement method using electrostatic induction power generation sheet

Research Project

Project/Area Number 21K09969
Research Category

Grant-in-Aid for Scientific Research (C)

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

Principal Investigator

Yoda Nobuhiro  東北大学, 歯学研究科, 教授 (20451601)

Co-Investigator(Kenkyū-buntansha) 佐々木 啓一  東北大学, 歯学研究科, 非常勤講師 (30178644)
土方 亘  東京工業大学, 工学院, 准教授 (30618947)
伊藤 浩之  東京工業大学, 科学技術創成研究院, 准教授 (40451992)
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: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
Fiscal Year 2022: ¥1,820,000 (Direct Cost: ¥1,400,000、Indirect Cost: ¥420,000)
Fiscal Year 2021: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
Keywords咬合力 / ブラキシズム / 静電誘導 / 発電シート / 静電誘導型発電シート / パラファンクション / オクルーザルスプリント / IoT
Outline of Research at the Start

補綴歯科治療や顎関節症への対応に際しては,機能運動やパラファンクション時の上下顎歯列の接触,さらには歯列内での咬合接触の部位,同部における咬合力の大きさ,を把握することが必要であるが,それらを客観的に把握しうる方法は無く,適切な装置開発のための技術基盤が必要とされている.
本研究は,咬合接触部位や咬合力のセンシングデバイスとして「静電誘導型発電シート」を活用し,さらにIoT技術を応用し出力を無線通信化することで,咀嚼などの機能的な下顎運動時,ブラキシズム等のパラファンクション時に歯列上に発現する咬合接触部位ならびに咬合力を日常環境下にてリアルタイムで測定しうる技術の開発を試みる.

Outline of Final Research Achievements

The force sensing device used in the occlusal force measuring device developed in this research uses an electrostatic induction type power generation sheet. When a constant load was applied at a certain frequency to the PET resin in which the sheet was embedded, a good correlation between the load force and the sensor output was found. Furthermore, we verified the output using thin PET resin to ensure the comfort of wearing the device in the oral cavity. We found that sufficient output was obtained even with PET resin 0.5 mm thick. Appropriate output was also confirmed in the oral cavity temperature environment. When a measuring device molded into a mouthguard shape was applied in the oral cavity, stable output was obtained during tapping and clenching movements, demonstrating its validity as an occlusal force measuring device.

Academic Significance and Societal Importance of the Research Achievements

「咬合力」は口腔の健康を示す重要な生体情報の一つである。たとえば、最大咬合力の低下が将来的なフレイルのリスクを高めることが指摘されており、本装置により日常的に発揮される咬合力をモニタリングすることは,フレイル予防の観点においても重要な情報を提供する。また、過大な咬合力負荷により歯列や顎骨へのダメージを与えうるブラキシズムに対してもモニタリング可能であり、マウスガードによる歯列へのダメージを減らすなどの対症療法効果のみならず、効率的な認知行動療法の実践に大きく貢献することが期待される。

Report

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

    (9 results)

All 2023 2022 2021

All Journal Article (5 results) (of which Int'l Joint Research: 2 results,  Peer Reviewed: 5 results,  Open Access: 1 results) Presentation (4 results) (of which Int'l Joint Research: 1 results,  Invited: 1 results)

  • [Journal Article] Effect of customized abutment taper configuration on bone remodeling and peri‐implant tissue around implant‐supported single crown: A 3D nonlinear finite element study2023

    • Author(s)
      Poovarodom Pongsakorn、Rungsiyakull Chaiy、Suriyawanakul Jarupol、Li Qing、Sasaki Keiichi、Yoda Nobuhiro、Rungsiyakull Pimduen
    • Journal Title

      Journal of Prosthodontics

      Volume: - Issue: 8 Pages: 815-823

    • DOI

      10.1111/jopr.13776

    • Related Report
      2023 Annual Research Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Impact of implant location on load distribution of implant-assisted removable partial dentures: a review of in vitro model and finite-element analysis studies2023

    • Author(s)
      Ichikawa Hiromi、Yoda Nobuhiro、Ogawa Toru、Iwamoto Maya、Kawata Tetsuo、Egusa Hiroshi、Sasaki Keiichi
    • Journal Title

      International Journal of Implant Dentistry

      Volume: 9 Issue: 1

    • DOI

      10.1186/s40729-023-00500-3

    • Related Report
      2023 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Effect of gingival height of a titanium base on the biomechanical behavior of 2-piece custom implant abutments: A 3-dimensional nonlinear finite element study2023

    • Author(s)
      Poovarodom Pongsakorn、Rungsiyakull Chaiy、Suriyawanakul Jarupol、Li Qing、Sasaki Keiichi、Yoda Nobuhiro、Rungsiyakull Pimduen
    • Journal Title

      The Journal of Prosthetic Dentistry

      Volume: 130 Issue: 3 Pages: 380.e1-380.e9

    • DOI

      10.1016/j.prosdent.2023.06.031

    • Related Report
      2023 Annual Research Report
    • Peer Reviewed
  • [Journal Article] In vivo measurement of three-dimensional load exerted on dental implants: a literature review2022

    • Author(s)
      Assoratgoon Itt、Yoda Nobuhiro、Iwamoto Maya、Sato Tomoya、Kawata Tetsuo、Egusa Hiroshi、Sasaki Keiichi
    • Journal Title

      International Journal of Implant Dentistry

      Volume: 8 Issue: 1 Pages: 52-52

    • DOI

      10.1186/s40729-022-00454-y

    • Related Report
      2022 Research-status Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] エレクトレットを用いた外部電源不要な触覚機能を有する人工皮膚に関する研究2021

    • Author(s)
      土方亘, 松本爽, 市川健太
    • Journal Title

      ロボティクス・メカトロニクス講演会講演概要集

      Volume: 0

    • NAID

      130008135059

    • Related Report
      2021 Research-status Report
    • Peer Reviewed
  • [Presentation] 静電誘導型発電シートを用いた咬合力測定装置の開発2023

    • Author(s)
      成原大衣智,依田信裕,江草宏,市川健太,土方亘,伊藤浩之
    • Organizer
      令和5年度生体医歯工学共同研究拠点成果報告会
    • Related Report
      2023 Annual Research Report
  • [Presentation] 静電誘導型発電シートを用いた咬合力測定装置の開発2022

    • Author(s)
      成原大衣智,依田信裕,江草宏,市川健太,土方亘,伊藤浩之.
    • Organizer
      令和4年度生体医歯工学共同研究拠点成果報告会
    • Related Report
      2022 Research-status Report
  • [Presentation] Development of a method to measure occlusal force based on electret and dielectric elastomer2022

    • Author(s)
      Taichi Narihara, Kenta Ichikawa, Nobuhiro Yoda, Wataru Hijikata, Hiroshi Egusa
    • Organizer
      The 7th International Symposium on Biomedical Engineering (ISBE2022)
    • Related Report
      2022 Research-status Report
  • [Presentation] Future possibility of digital denture production based on computer-aided engineering2022

    • Author(s)
      Nobuhiro Yoda
    • Organizer
      The 3rd International Conference on Digital Solutions for Education and Clinical Dentistry (ICDSECD) 2022
    • Related Report
      2021 Research-status Report
    • Int'l Joint Research / Invited

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

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