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The relationship between swallowing related muscles and skeletal muscle in aging

Research Project

Project/Area Number 17H06664
Research Category

Grant-in-Aid for Research Activity Start-up

Allocation TypeSingle-year Grants
Research Field Social dentistry
Research InstitutionTokyo Medical and Dental University

Principal Investigator

Hara Koji  東京医科歯科大学, 歯学部附属病院, 医員 (10804164)

Project Period (FY) 2017-08-25 – 2019-03-31
Project Status Completed (Fiscal Year 2018)
Budget Amount *help
¥1,690,000 (Direct Cost: ¥1,300,000、Indirect Cost: ¥390,000)
Fiscal Year 2018: ¥260,000 (Direct Cost: ¥200,000、Indirect Cost: ¥60,000)
Fiscal Year 2017: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Keywordsオーラルフレイル / 咬合力 / 舌圧 / 開口力 / サルコペニア / 加齢 / 摂食嚥下障害 / フレイル
Outline of Final Research Achievements

Swallowing muscle strength weakens with aging. We investigated differences between age-related declines in TP (Tongue pressure), MBF (maximum bite force) and JOF (jaw-opening force) in a cross-sectional study of 980 healthy and independent participants (379 men, 601 women) without dysphagia. MBF, TP, and JOF were compared among decade-based age groups in multiple comparison analyses with post-hoc tests. Participants with not having occlusal support were excluded in only assessing MBF. TP started to significantly decline in the 60s and 50s for men and women (p<0.01 and p<0.05, respectively); JOF started to significantly decline in men in their 80s (p<0.01, large effect size), but remained unchanged in women. MBF in both men and women remained unchanged with aging. The results reveal that different patterns exist in the age-related decline in swallowing muscle strength.

Academic Significance and Societal Importance of the Research Achievements

加齢に伴う摂食嚥下筋の筋力低下を見過ごすことで、将来的に摂食嚥下障害を引き起こす可能性がある。舌の筋肉は、他の筋よりも老化による筋力低下が生じやく、高齢者に見られる滑舌の低下や食事の際のむせと関連している可能性がある。そのため筋力が低下し始める中高年から、舌の運動を行い、筋力を維持することが重要である。一方で、加齢に伴う咬合力の低下は、摂取できる食品が制限されることで栄養状態に影響を与えることが知られている。咬合力低下予防には、咀嚼筋の老化よりも歯の喪失が関連していることが示唆された。そのため、虫歯や歯周病の治療・予防による歯の喪失を防ぐことが咬合力低下予防となる。

Report

(3 results)
  • 2018 Annual Research Report   Final Research Report ( PDF )
  • 2017 Annual Research Report
  • Research Products

    (3 results)

All 2019 2018

All Journal Article (2 results) (of which Peer Reviewed: 2 results,  Open Access: 1 results) Presentation (1 results)

  • [Journal Article] Association between tongue muscle strength and masticatory muscle strength.2019

    • Author(s)
      Hara K, Tohara H, Kobayashi K, Yamaguchi K, Chantaramanee A, Yoshimi K, Nakane A, Minakuchi S.
    • Journal Title

      J Oral Rehabil.

      Volume: 46(2) Issue: 2 Pages: 134-139

    • DOI

      10.1111/joor.12737

    • Related Report
      2018 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Age-related declines in the swallowing muscle strength of men and women aged 20-89 years: A cross-sectional study on tongue pressure and jaw-opening force.2018

    • Author(s)
      Hara K, Tohara H, Kobayashi K, Yamaguchi K, Yoshimi K, Nakane A, Minakuchi S
    • Journal Title

      Arch Gerontol Geriatr

      Volume: 78 Pages: 64-67

    • DOI

      10.1016/j.archger.2018.05.015

    • Related Report
      2018 Annual Research Report
    • Peer Reviewed
  • [Presentation] 健常高齢者における舌圧と口腔周囲筋の関係2018

    • Author(s)
      原豪志,戸原玄,小林健一郎,山口浩平,吉見佳那子,中根綾子,水口俊 介
    • Organizer
      第29回日本老年歯科医学会学術大会
    • Related Report
      2018 Annual Research Report

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Published: 2017-08-25   Modified: 2020-03-30  

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