関節円板前方転位が下顎運動に及ぼす影響 : 側方滑走運動時の解析  [in Japanese] Effect of the Anterior Disc Displacement of TMJ on Mandibular Movement during Lateral Excursion  [in Japanese]

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Author(s)

    • 金村 清孝 KANEMURA Kiyotaka
    • 岩手医科大学歯学部歯科補綴学第二講座 Department of Fixed Prosthodontics, School of dentistry, Iwate Medical University
    • 藤澤 政紀 FUJISAWA Masanori
    • 岩手医科大学歯学部歯科補綴学第二講座 Department of Fixed Prosthodontics, School of dentistry, Iwate Medical University
    • 石橋 寛二 ISHIBASHI Kanji
    • 岩手医科大学歯学部歯科補綴学第二講座 Department of Fixed Prosthodontics, School of dentistry, Iwate Medical University

Abstract

To understand the relationship between disc displacement status and condylar movement, the mandibular movement together with articular disc position of 80 outpatients with temporomandibular disorders were examined. Articular disc position was detected with a 1.5 T MR scanner. Mandibular movement was analyzed with a six-degree-of-freedom jaw tracking device.<BR>Evaluation of nonworking condylar movement during lateral excursion jaw movement made it possible to reduce the effect of contralateral condylar movement.<BR>The results were as follows:<BR>1. Out of 160 mandibular joints, 80 joints were found to be disc displaced. Thirty-nine cases involved reduction and 41 nonreduction.<BR>2. No joint having disc displacement with reduction was classified as grade 3, implying the most prominent displacement in terms of condylar head and disc positional relationship.<BR>3. It showed a high correlation between the range of condylar movement and that of incisal movement regardless of the disc situation.<BR>4. Range of lateral movement at the nonworking condylar point was influenced by the degree of displacement rather than by the instance or lack of reduction.

Journal

  • Nihon Hotetsu Shika Gakkai Zasshi

    Nihon Hotetsu Shika Gakkai Zasshi 42(6), 1007-1012, 1998-12-10

    Japan Prosthodontic Society

References:  32

Cited by:  6

Codes

  • NII Article ID (NAID)
    10008171619
  • 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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