内側翼突筋に関する筋電図学的検討 : 第2報 咬合支持部位の相違が閉口筋に及ぼす影響  [in Japanese] EMG Activity of the Human Medial Pterygoid Muscle in Relation to the Other Jaw Muscles : Part 2 : Effect of Changing Occlusal Bite Positions on the Correlation between the Medial Pterygoid Muscle and the Other Closing Muscle Activity  [in Japanese]

Access this Article

Search this Article

Author(s)

    • 岡部 良博 OKABE Yoshihiro
    • 東京医科歯科大学歯学部補綴学第一講座 The First Department of Prosthodontics, Faculty of Dentistry, Tokyo Medical and Dental University
    • 藍 稔 AI Minoru
    • 東京医科歯科大学歯学部補綴学第一講座 The First Department of Prosthodontics, Faculty of Dentistry, Tokyo Medical and Dental University
    • 屋嘉 智彦 YAKA Tomohiko
    • 東京医科歯科大学歯学部補綴学第一講座 The First Department of Prosthodontics, Faculty of Dentistry, Tokyo Medical and Dental University
    • 西山 暁 NISHIYAMA Akira
    • 東京医科歯科大学歯学部補綴学第一講座 The First Department of Prosthodontics, Faculty of Dentistry, Tokyo Medical and Dental University
    • 佐藤 雅之 SATO Masayuki
    • 東京医科歯科大学歯学部補綴学第一講座 The First Department of Prosthodontics, Faculty of Dentistry, Tokyo Medical and Dental University

Abstract

This study was conducted to investigate the muscle activity of the medial pterygoid, the superficial masseter and the anterior temporal muscles when two bite forces (49 N and 147 N) were exerted on different teeth. The subjects were instructed to perform isometric muscle contractions on either the right or left first premolar or second molar. Simultaneously, the EMG activity of the muscles was registered using subcutaneous needle electrodes.<BR>The results were as follows:<BR>1. The change of the bite-point location affected the EMG activity of all the muscles. Although the occlusal bite force was altered from 49 N to 147 N, various patterns in each muscle activity at each bite location were almost consistent.<BR>2. The largest activity was observed in the medial pterygoid and masseter muscles on the contralateral first premolar, while that of the temporal muscles was on the ipsilateral first premolar. Clenching on one first premolar compared with the other first premolar resulted in a significant increase in the activity of the working-side temporal muscle.<BR>3. The bite-point location being changed from right second molar to various other teeth, at a 49 N bite force the right medial pterygoid muscle had a significant correlation between the right or left masseter and right temporal muscles. At a 147 N bite force the medial pterygoid muscle significantly correlated to ipsilateral masseter muscle.

Journal

  • Nihon Hotetsu Shika Gakkai Zasshi

    Nihon Hotetsu Shika Gakkai Zasshi 43(4), 681-688, 1999-08-10

    Japan Prosthodontic Society

References:  27

Cited by:  2

Codes

  • NII Article ID (NAID)
    10008174057
  • NII NACSIS-CAT ID (NCID)
    AN00197911
  • Text Lang
    JPN
  • Article Type
    Journal Article
  • ISSN
    03895386
  • Data Source
    CJP  CJPref  J-STAGE 
Page Top