垂直的咬頭干渉が咬合力発現に及ぼす影響  [in Japanese] Effect of Vertical Cuspal Interferences on Occlusal Force  [in Japanese]

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Author(s)

    • 木原 伸彰 KIHARA Nobuaki
    • 大阪歯科大学大学院歯学研究科歯科補綴学専攻 Osaka Dental University, Graduate School, Major in Prosthodontics

Abstract

This study was conducted to investigate the influence of the vertical cuspal interference with the madibular first molar on the appearance of occlusal force during maximum clenching and mandibule tapping.<BR>Occlusal force was measured using a three-dimensional transducer placed on unilateral first molars of mandible. Cuspal interference was applied using stainless foils (10, 30, 50, 70, 100, 200, 500, 1, 000 and 2, 000 m in thickness) to the flat occlusal table. The results were as follows:<BR>1. At the height of cuspal interferences of 10-100μm, the impulse of occlusal force increased by the centralization of force with the increase in height during clenching (10μm: 1.2 times compared to control, 100 m: 5.9 times).<BR>2. At the height of 10-100μm, the impulse of occlusal force increased by the centralization of force with the increase in height, although EMG activity (AOTC, DOTC, APTC·MV) was not changed (10μm: 1.7 times, 100μm: 5.3 times).<BR>3. At the height of 100-200μm, the mandibule became unstable, with marked changes in the impulse of occlusal force, EMG activity and mandibular position. In two of the three subjects, the increase of the occlusal force was inhibited and in the other increased.<BR>4. These findings indicate that cuspal interference is a very serious acute problem for concerned teeth.

Journal

  • Nihon Hotetsu Shika Gakkai Zasshi

    Nihon Hotetsu Shika Gakkai Zasshi 41(1), 149-157, 1997-02-01

    Japan Prosthodontic Society

References:  39

Cited by:  14

Codes

  • NII Article ID (NAID)
    10008165525
  • 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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