[Updated on Apr. 18] Integration of CiNii Articles into CiNii Research

Influence of Alteration of Tooth Contact on Mandibular Displacement during Lateral Clenching.

  • Baba Kazuyoshi
    The First Department of Prosthodontics, Faculty of Dentistry, Tokyo Medical and Dental University
  • Yugami Kei
    The First Department of Prosthodontics, Faculty of Dentistry, Tokyo Medical and Dental University
  • Yaka Tomohiko
    The First Department of Prosthodontics, Faculty of Dentistry, Tokyo Medical and Dental University
  • Akishige Satoshi
    The First Department of Prosthodontics, Faculty of Dentistry, Tokyo Medical and Dental University
  • Haketa Tadasu
    The First Department of Prosthodontics, Faculty of Dentistry, Tokyo Medical and Dental University
  • Ai Minoru
    The First Department of Prosthodontics, Faculty of Dentistry, Tokyo Medical and Dental University

Bibliographic Information

Other Title
  • こう合接触部位の違いが側方クレンチング時の下顎の変位に及ぼす影響
  • 咬合接触部位の違いが側方クレンチング時の下顎の変位に及ぼす影響

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Abstract

To investigate the relationship between occlusal scheme and joint loading, mandibular displacement was measured during lateral clenching under experimentally altered occlusal conditions. Acrylic occlusal devices were fabricated for the lower working-side canine, working-side second molar, and balancingside second molar. With the aid of these devices, various occlusal states were simulated. Eight healthy subjects volunteered for this study and performed clenching tasks. Vertical displacements of the mandible were recorded by linear variable differential transformers, and the results were as follows:<BR>1. Clenching efforts in the lateral mandibular position caused elevation of the mandible.<BR>2. When a single occlusal device was placed unilaterally, the amount of the upward displacement near the supporting tooth tended to be smallest.<BR>3. Insertion of three occlusaldevices (bilateral tooth contacts) reduced the amplitude of mandibular displacement.<BR>These results suggested that the nature of reaction forces at the temporomandibular joints caused by the elevation of the mandible would be influenced by the occlusal status.

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