ガイドの歯種の変化が側方位クレンチング時の顆頭に及ぼす影響  [in Japanese] Influence of Changing the Location of Anterior Guidance Teeth on the Condyles during Unilateral Clenching  [in Japanese]

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Author(s)

    • 荒井 良明 ARAI Yoshiaki
    • 新潟大学歯学部歯科補綴学第一講座 Department of Removable Prosthodontics, School of Dentistry, Niigata University
    • 河野 正司 KOHNO Shoji
    • 新潟大学歯学部歯科補綴学第一講座 Department of Removable Prosthodontics, School of Dentistry, Niigata University

Abstract

This study was conducted to examine the influence of changing the location of guidance teeth on the movements of the condyles during simulated parafunctional unilateral clenching.<BR>Two healthy adults volunteered for this study. To simulate bruxist behaviour, they were asked to perform maximal clenching in a lateral edge to edge position with onlay-like metal guidances that increased by 10 degrees the inclination of the lateral excursions, but did not change at all the vertical dimension in intercuspal position.<BR>A 6-degree-of-freedom jaw movement measurement system was used to record 3-dimensionally the condylar movements.<BR>When the contact point of the anterior guidance was moved posteriorly along the arch from canine to second molar, the trajectory of working condyle movement was an antero-superior one up to the first premolar; but from the first molar this trajectory changed dramatically to an inferior one during unilateral clenching. All the trajectories of nonworking condyle movement were superior during unilateral clenching.<BR>In consideration of the movements of the working condyle during eccentric movement in a parafunctional environment, the results suggested that the location of guidance teeth should be relegated to the anterior region of the working side.

Journal

  • Nihon Hotetsu Shika Gakkai Zasshi

    Nihon Hotetsu Shika Gakkai Zasshi 41(3), 468-480, 1997-06-01

    Japan Prosthodontic Society

References:  41

Cited by:  34

Codes

  • NII Article ID (NAID)
    10008166593
  • 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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