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Influential factor on occurrence of Stage II transport in masticatory and swallowing movement

Research Project

Project/Area Number 25463023
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Research Field Prosthodontics/ Dental materials science and
Research InstitutionTokyo Dental College

Principal Investigator

Yamashita Shuichiro  東京歯科大学, 歯学部, 教授 (80242212)

Co-Investigator(Kenkyū-buntansha) HOTA Hiromi  東京歯科大学, 歯学部, 准教授 (50130133)
ISHIDA Ryo  東京歯科大学, 歯学部, 教授 (00327933)
Project Period (FY) 2013-04-01 – 2016-03-31
Project Status Completed (Fiscal Year 2015)
Budget Amount *help
¥5,070,000 (Direct Cost: ¥3,900,000、Indirect Cost: ¥1,170,000)
Fiscal Year 2015: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
Fiscal Year 2014: ¥390,000 (Direct Cost: ¥300,000、Indirect Cost: ¥90,000)
Fiscal Year 2013: ¥3,640,000 (Direct Cost: ¥2,800,000、Indirect Cost: ¥840,000)
KeywordsStage Ⅱ transport / 経鼻内視鏡 / 摂食・嚥下 / 咀嚼運動 / 顎口腔機能 / Stage II transport / StageⅡtransport / StageIItransport
Outline of Final Research Achievements

The purpose of this study was to evaluate the effect of intentionally controlled occlusal force during mastication upon the expression of stage II transport (St II). Five adults with healthy dentition were instructed to make (1)natural mastication and also (2)mastication with 50% of occlusal force, controlled by electromyogram. The test foods were peanuts and gummy jelly. To investigate stage II transport and bolus aggregation in the pharynx, a transnasal endoscope was used.
The numbers of chewing strokes of total, pre-St II, and post-St II processes were significantly higher in case of 50% mastication than in natural mastication. Furthermore, the rate of increase in the number during post-St II process was markedly higher in peanuts than gummy jelly. The results demonstrate that weaker mastication force needs more chewing stroke, and that this tendency varies with the type of food. This fact may lead to clarify the relationship between mastication form and expression of St II.

Report

(4 results)
  • 2015 Annual Research Report   Final Research Report ( PDF )
  • 2014 Research-status Report
  • 2013 Research-status Report
  • Research Products

    (2 results)

All 2015

All Presentation (2 results)

  • [Presentation] 咀嚼時咬合力のコントロールがStageⅡtransportの発現に及ぼす影響2015

    • Author(s)
      小峯明子,山下秀一郎,石田  瞭
    • Organizer
      日本補綴歯科学会 東京支部総会・第19回学術大会
    • Place of Presentation
      東京医科歯科大学M&Dタワー 鈴木章夫記念講堂
    • Year and Date
      2015-11-29
    • Related Report
      2015 Annual Research Report
  • [Presentation] 咀嚼時咬合力の変化がStageⅡtransportの発現に及ぼす影響2015

    • Author(s)
      小峯明子,山下秀一郎,石田  瞭
    • Organizer
      第300回東京歯科大学学会
    • Place of Presentation
      東京歯科大学水道橋校舎新館
    • Year and Date
      2015-10-17
    • Related Report
      2015 Annual Research Report

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Published: 2014-07-25   Modified: 2019-07-29  

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