三次元咬合力に基づく側頭筋機能に関する研究  [in Japanese] Study on Physiological Function of Human Temporal Muscle Related to Three-Dimensional Bite Force  [in Japanese]

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Author(s)

    • 川田 哲男 KAWATA Tetsuo
    • 東北大学歯学部歯科補綴学第二講座 Department of Prosthetic Dentistry, Tohoku University Schoo1 of Dentistry
    • 渡辺 誠 WATANABE Makoto
    • 東北大学歯学部高齢者歯科学講座 Department of Geriatric Dentistry, Tohoku University Schoo1 of Dentistry

Abstract

This study was conducted to clarify functional differentiation among the anterior temporal muscle (AT), the middle temporal muscle (MT), and the posterior temporal muscle (PT) for producing bite force with various direction and magnitude. Six male subjects were asked to bite arbitrarily and the direction and magnitude were recorded using a three-dimensional bite-force-transducer. Concurrently, electromyogram of muscles was done. As a result, each muscle had a proper range of bite force direction with its range wider in AT and narrower in PT. Each muscle had a specific direction shown by highest EMG activity, anteriorly in AT and posteriorly in PT. In AT, the activity was higher than the others with anterior bite force direction. In MT, it was higher than the other two when the direction of bite force was posterior. In PT, the proportional activity to the combined muscle activity increased as the bite force direction changed to posterior, with an opposite tendency in AT. Changing the direction of bite force laterally had no effect on the proportion of muscle activity. The findings indicated a functional partitioning of the temporal muscle into at least three parts. The direction of muscle fibers seems to dictate the characteristics of muscle function.

Journal

  • Nihon Hotetsu Shika Gakkai Zasshi

    Nihon Hotetsu Shika Gakkai Zasshi 44(4), 486-498, 2000-08-10

    Japan Prosthodontic Society

References:  42

Cited by:  1

Codes

  • NII Article ID (NAID)
    10008155962
  • NII NACSIS-CAT ID (NCID)
    AN00197911
  • Text Lang
    JPN
  • Article Type
    Journal Article
  • ISSN
    03895386
  • Data Source
    CJP  CJPref  J-STAGE 
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