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

Effects of clenching on regulatory function of bite force in man-role of peridontal mechanoreceptor

Research Project

Project/Area Number 07672134
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeSingle-year Grants
Section一般
Research Field 補綴理工系歯学
Research InstitutionMatsumoto Dental College

Principal Investigator

KURASAWA Ikufumi  Matsumoto Dental College Dentistry Associate Professor, 歯学部, 助教授 (60131059)

Co-Investigator(Kenkyū-buntansha) WAKAMATSU Masanori  Matsumoto Dental College Dentistry Instructor, 歯学部, 助手 (30240451)
TAKAHASHI Yoshihiro  Matsumoto Dental College Dentistry Instructor, 歯学部, 助手 (90171537)
Project Period (FY) 1995 – 1996
Project Status Completed (Fiscal Year 1996)
Budget Amount *help
¥2,000,000 (Direct Cost: ¥2,000,000)
Fiscal Year 1996: ¥300,000 (Direct Cost: ¥300,000)
Fiscal Year 1995: ¥1,700,000 (Direct Cost: ¥1,700,000)
Keywordsclenching / bite force / periodontal mechanoreceptor / hyperactivity / craniomandibular disorders / 固有受容器 / ブラキシズム / 反射 / 筋緊張亢進
Research Abstract

It has previously been reported that bruxism is noted as one of the important causes of a temporomandibular dysfunction. Various discussions have been done about a relation between muscular activity and bruxism. A negative view is proposed from the result of the resting EMG activity about a causal relationship between the pain and the hyperactivity of the masticatory muscle in patients with tempolomandibular dysfunction. However, the fundamental problem is not clarified how any influence the sutained clenching exerts to the masticatory system. We have investigated whether the clenching that is one of the form of bruxism influence for short term to the stomatognathic system. The conditioning clenching induced a significant error in reproducing a leamed criterion bite force under conditions of no visual feed-back of force, like the experiments of Hutton et al. These findings indicate the possibility that the facilitation of motoneurones of closing muscles might occur after clenching. Furthermore, we have investigated whether the periodontal mechanoreceopors are responsible for the effect after clenching. Following results were obtained. 1. The upper oentral incisors were stimulated by the mechanical stimulator under 5% maximum voluntary teeth clenching. A short-latency inhibitory response was induced in masseter muscle, followed by an exciatory response to brisk taps on the teeth, and mainly excitatory response was induced to slow pushes. 2. These responses were almost abolished by local anesthesia around the teeth stimulated. 3. An excitability response to slow pushes increased with background discharge level. 4. A significant change was not observed for response to slow pushes before and after the clenching for 25% m.v.c.-60 seconds. Consequently, although a reflex arc from the periodontal mechanoreceptor to the masseter motoneurone has relatively little role to the postclenching effect, it is obvious to have a facilitatory effect to slow pushes.

Report

(3 results)
  • 1996 Annual Research Report   Final Research Report Summary
  • 1995 Annual Research Report
  • Research Products

    (10 results)

All Other

All Publications (10 results)

  • [Publications] 倉沢郁文: "クレンチングが歯根膜-咬筋反射に及ぼす影響" 日本補綴歯科学会雑誌. 39巻特別号. 106 (1995)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1996 Final Research Report Summary
  • [Publications] 倉沢郁文: "クレンチングが歯根膜受容器由来の咬筋反射性応答に及ぼす影響" 日本補綴歯科学会雑誌. 40巻特別号. 62 (1996)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1996 Final Research Report Summary
  • [Publications] Kurasawa,I: "Brain and Oral Fuicctions Postclenching effect on human bite force ragulatory function" Elsevier (Morimoto, T., Matsuya, T., Takada, K.), 648(393-397) (1995)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1996 Final Research Report Summary
  • [Publications] I.Kurasawa: "Effect of Postclenching on Periodontal Mseeteric Reflex in Man" J.Jpn.Prosthodont.Soc.39. 106 (1995)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1996 Final Research Report Summary
  • [Publications] I.Kurasawa: "Effect of Clenching on Massteric Reflex Originating from" J.Jpn.Prosthodont.Soc.40. 62 (1996)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1996 Final Research Report Summary
  • [Publications] I.Kurasawa: Brain and Oral Function. Morimoto et al.Eds.Postclenching Effect on Human Bite Force Regulatory Function. Elsevier, Amsterdam, 393-397 (1995)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1996 Final Research Report Summary
  • [Publications] 倉沢郁文: "クレンチングが歯根膜-咬筋反射に及ぼす影響" 日本補綴歯科学会雑誌. 39巻94回特別号. 106- (1995)

    • Related Report
      1996 Annual Research Report
  • [Publications] 倉沢郁文: "クレンチングが歯根膜受容器由来の咬筋反射性応答に及ぼす影響" 日本補綴歯科学会雑誌. 40巻96回特別号. 62- (1996)

    • Related Report
      1996 Annual Research Report
  • [Publications] Kurasawa I: "Brain and Oral functions Postclenching effect on human bite force regulatory function" Elsevier (Morimoto,T.,Matsuya,T.,Takada,K.), 648(397-397) (1995)

    • Related Report
      1996 Annual Research Report
  • [Publications] 倉沢郁文,高橋喜博,柳田史城,玉岡玲洋,甘利光治: "クレンチングが歯根膜-咬筋反射に及ぼす影響" 日本補綴歯科学会雑誌. 39. 106- (1995)

    • Related Report
      1995 Annual Research Report

URL: 

Published: 1995-04-01   Modified: 2016-04-21  

Information User Guide FAQ News Terms of Use Attribution of KAKENHI

Powered by NII kakenhi