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Multiscale analysis of maxillofacial locomotor for elucidation of oral frailty mechanisms

Research Project

Project/Area Number 20K18616
Research Category

Grant-in-Aid for Early-Career Scientists

Allocation TypeMulti-year Fund
Review Section Basic Section 57050:Prosthodontics-related
Research InstitutionTokyo Dental College

Principal Investigator

Kasahara Masaaki  東京歯科大学, 歯学部, 講師 (60779776)

Project Period (FY) 2020-04-01 – 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 2022: ¥520,000 (Direct Cost: ¥400,000、Indirect Cost: ¥120,000)
Fiscal Year 2021: ¥1,690,000 (Direct Cost: ¥1,300,000、Indirect Cost: ¥390,000)
Fiscal Year 2020: ¥1,950,000 (Direct Cost: ¥1,500,000、Indirect Cost: ¥450,000)
Keywordsオーラルフレイル / エンテーシス / 骨質 / 生体アパタイト / 結晶配向性 / 力学解析 / マルチスケール解析 / 筋機能圧
Outline of Research at the Start

オーラルフレイルは咀嚼筋の筋機能減退に伴い顎骨の力学機能が低下し、それぞれの構造形態に影響が生じると考えられるが、その相関性は不明である。そこで本申請課題は、口腔機能低下の機序解明のために、顎口腔系運動器の構造と機能の関連を明らかにする。1)咀嚼筋の腱-骨付着部におけるマルチスケール構造解析を行い、各スケールの構造特性と筋機能の関連を解明する。2)筋機能圧による荷重の大きさが顎骨の形態・構造へ及ぼす変化を調べる。これら両者の包括的な解析を行うことで、オーラルフレイル機序解明のための基礎的基盤を確立、提案に挑む。

Outline of Final Research Achievements

Oral frailty is thought to be caused by a decline in the mechanical function of the maxillofacial locomotor due to a decrease in the muscle function of the perioral muscles, affecting their respective structures and morphologies, but the correlation between the two is not clear. Therefore, the purpose of this project was to clarify the relationship between the structure and function of the oral and maxillofacial locomotor in order to elucidate the mechanism of oral functional decline. To this end, 1) multi-scale structural analysis at the tendon-bone attachment of perioral muscles will be conducted to elucidate the relationship between the structural characteristics of each scale and muscle function. Next, we used experimental animals to 2) examine the changes in the jawbone morphology and structure due to the magnitude of loading caused by muscle function pressure. From the results obtained, we aimed to establish a basic foundation for elucidating the mechanism of oral frailty.

Academic Significance and Societal Importance of the Research Achievements

顎口腔系運動器は咬合のみならず口腔周囲筋に代表される咀嚼筋や舌骨上筋、下筋からの筋機能圧を絶えず受ける骨であることから、顎顔面領域における筋-腱-骨の構造特性と力学環境の関連性解明が切望されている。また、マクロ・ミクロスケールの構造的要素とメゾ・ナノスケールの材質的要素の相互作用及び力学機能との関連解明は、顎口腔系運動器の複雑なバイオメカニクスを究明するためには急務であると考える。本申請課題で得られる結果から、口腔機能維持・向上に向けた方略を確立、提案できると考え、将来的にはオーラルフレイル防止を目指した生体力学的診断基準の規定に貢献できると考えている。

Report

(5 results)
  • 2023 Annual Research Report   Final Research Report ( PDF )
  • 2022 Research-status Report
  • 2021 Research-status Report
  • 2020 Research-status Report
  • Research Products

    (11 results)

All 2024 2023 2022 2021 2020

All Journal Article (8 results) (of which Peer Reviewed: 8 results,  Open Access: 6 results) Presentation (3 results) (of which Int'l Joint Research: 1 results)

  • [Journal Article] Analysis of Bone Mineral Density and Bone Quality of Cortical Bone in the Human Hyoid Body and Histological Observation of the Entheses2024

    • Author(s)
      Kasahara Masaaki、Someya Tomoko、Kitamura Kei、Watanabe Genji、Matsunaga Satoru、Abe Shinichi、Hattori Masayuki
    • Journal Title

      Journal of Functional Biomaterials

      Volume: 15 Issue: 3 Pages: 56-56

    • DOI

      10.3390/jfb15030056

    • Related Report
      2023 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] The effects of orthodontic anchor screw inserted into the femur of growth-phase or mature rats —Osteoid formation, bone mineral density, collagen fiber bundles, biological apatite crystal orientation—2023

    • Author(s)
      NISHIMURA Tatsuro、MATSUNAGA Satoru、KASAHARA Masaaki、KASAHARA Norio、NAKANO Takayoshi、ISHIMOTO Takuya、YAMAMOTO Hitoshi、ABE Shinichi、NISHII Yasushi
    • Journal Title

      Dental Materials Journal

      Volume: 42 Issue: 4 Pages: 542-551

    • DOI

      10.4012/dmj.2022-209

    • ISSN
      0287-4547, 1881-1361
    • Year and Date
      2023-07-25
    • Related Report
      2023 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Effect of the Correction of Bilateral Differences in Masseter Muscle Functional Pressure on the Mandible of Growing Rats2023

    • Author(s)
      Mizuno Shuhei、Matsunaga Satoru、Kasahara Norio、Kasahara Masaaki、Shimoo Yoshiaki、Abe Shinichi、Nakano Takayoshi、Ishimoto Takuya、Hikita Atsuhiko、Nojima Kunihiko、Nishii Yasushi
    • Journal Title

      Journal of Functional Biomaterials

      Volume: 14 Issue: 8 Pages: 435-435

    • DOI

      10.3390/jfb14080435

    • Related Report
      2023 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Alveolar Bone Microstructure Surrounding Orthodontic Anchor Screws with Plasma Surface Treatment in Rats2023

    • Author(s)
      Okawa Keisuke、Matsunaga Satoru、Kasahara Norio、Kasahara Masaaki、Tachiki Chie、Nakano Takayoshi、Abe Shinichi、Nishii Yasushi
    • Journal Title

      Journal of Functional Biomaterials

      Volume: 14 Issue: 7 Pages: 356-356

    • DOI

      10.3390/jfb14070356

    • Related Report
      2023 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Evaluation of the Microstructural Characteristics of Bone Surrounding Anchor Screws Placed under a Horizontal Load by Exploring the Orientation of Biological Apatite Crystals and Collagen Fiber Anisotropy2022

    • Author(s)
      Matsumoto Takaaki、Matsunaga Satoru、Kasahara Masaaki、Kasahara Norio、Nakano Takayoshi、Ishimoto Takuya、Nishii Yasushi
    • Journal Title

      Journal of Hard Tissue Biology

      Volume: 31 Issue: 2 Pages: 79-86

    • DOI

      10.2485/jhtb.31.79

    • ISSN
      1341-7649, 1880-828X
    • Related Report
      2022 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Micro/nanostructural Characteristic Changes in the Mandibles of Rats after Injection of Botulinum Neurotoxin2021

    • Author(s)
      Kusaba Gaku、Matsunaga Satoru、Kitamura Kei、Kasahara Masaaki、Shimoo Yoshiaki、Abe Shinichi、Nakano Takayoshi、Ishimoto Takuya、Hikita Atsuhiko、Nojima Kunihiko、Nishii Yasushi
    • Journal Title

      Journal of Hard Tissue Biology

      Volume: 30 Issue: 2 Pages: 183-192

    • DOI

      10.2485/jhtb.30.183

    • NAID

      130008024914

    • ISSN
      1341-7649, 1880-828X
    • Related Report
      2021 Research-status Report
    • Peer Reviewed
  • [Journal Article] Structural characteristics of the bone surrounding dental implants placed into the tail-suspended mice2021

    • Author(s)
      Otsu Yuto、Matsunaga Satoru、Furukawa Takehiro、Kitamura Kei、Kasahara Masaaki、Abe Shinichi、Nakano Takayoshi、Ishimoto Takuya、Yajima Yasutomo
    • Journal Title

      International Journal of Implant Dentistry

      Volume: 7 Issue: 1 Pages: 89-89

    • DOI

      10.1186/s40729-021-00374-3

    • Related Report
      2021 Research-status Report
    • Peer Reviewed
  • [Journal Article] Micro- and nano-bone analyses of the human mandible coronoid process and tendon-bone entheses2020

    • Author(s)
      Kasahara Masaaki、Matsunaga Satoru、Someya Tomoko、Kitamura Kei、Odaka Kento、Ishimoto Takuya、Nakano Takayoshi、Abe Shinichi、Hattori Masayuki
    • Journal Title

      Journal of Biomedical Materials Research Part B: Applied Biomaterials

      Volume: in press Issue: 7 Pages: 00-00

    • DOI

      10.1002/jbm.b.34609

    • Related Report
      2020 Research-status Report
    • Peer Reviewed / Open Access
  • [Presentation] Analysis of biological apatite crystal orientation in cortical bone of human hyoid bone using microbeam X-ray diffractometry2022

    • Author(s)
      Masaaki KASAHARA , Tomoko SOMEYA , Hiroki KAGOURA, Masayuki HATTORI
    • Organizer
      INTERNATIONAL DENTAL MATERIALS CONGRESS
    • Related Report
      2022 Research-status Report
    • Int'l Joint Research
  • [Presentation] ミクロ/ ナノスケール解析によるヒト筋突起腱付着部の構造特性解明2021

    • Author(s)
      笠原正彰、染屋智子、服部雅之
    • Organizer
      第24回日本歯科医学学術大会
    • Related Report
      2021 Research-status Report
  • [Presentation] ヒト下顎骨筋突起腱付着部におけるミクロ―ナノ解析2020

    • Author(s)
      笠原正彰,松永 智,染屋智子,北村 啓,小高研人,阿部伸一,服部雅之
    • Organizer
      東京歯科大学学会(総会)
    • Related Report
      2020 Research-status Report

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Published: 2020-04-28   Modified: 2025-01-30  

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