下顎運動パラメータの安定性について : 3年経過後の評価から  [in Japanese] Reliability of the Mandibular Movement Parameters : Initial and 3-year Subsequent Recording Comparison  [in Japanese]

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Author(s)

    • 佐藤 真 SATO Shin
    • 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
    • 鈴木 卓哉 SUZUKI Takuya
    • 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
    • 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
    • 工藤 亜希子 KUDO Akiko
    • 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

目的: 下顎運動の経年的な安定性を調べることを目的に, 健常者における初回と3年経過時の下顎運動結果の関係を下顎運動解析から検討した.<BR>方法: 岩手医科大学歯学部学生のなかで, 顎機能に異常がない27名 (男性20名, 女性7名, 平均年齢20.4±2.4歳) を被験者とし, 6自由度下顎運動測定装置を用いて, 下顎運動記録を行った. 下顎限界運動および習慣性開閉口運動における, 切歯点および左右顆頭点の移動距離を求め, 初回と3年経過時の測定結果の比較を行った.<BR>結果: 前方滑走運動時, 左右側方滑走運動時, 習慣性開閉口運動時において, いずれのパラメータにおいても初回と3年経過時の間に有意差を認めなかった (対応のあるt検定). また, 測定値間の相関を調べた結果, 12項目中11項目で有意な相関が認められた. 初回の測定後に顎関節症の症状を発症した被験者が5名出現したが, これらの被験者の初回のデータから将来の発症を示唆する特徴的な点は認められなかった.<BR>結論: 本研究結果より, 健常者における下顎運動測定データでは経年的な変動が少なく, 再現性を有する安定したパラメータとして評価しうることから, 顎機能の変化を評価するうえでの有用性が確認できた. しかしながら, 下顎運動測定結果のみで症状の発症を予知するパラメータとは考えにくいものと思われる.

Purpose: To ascertain the reproducibility and reliability of mandibular movement as one of the parameters reflecting mandibular functions, mandibular movements were recorded at different time points over three years for the same subjects.<BR>Methods: For twenty-seven healthy volunteers (20 males and 7 females, average age 20.4±2.4 years old) without past or current history of temporomandibular disorder (TMD), border mandibular movement and habitual open-close jaw movements were recorded with a six-degree-of-freedom jaw tracking device. Three years later, identical movements that the subjects had initially been instructed to perform were recorded again for the same subjects, and the translational distance at the incisal and condylar points were compared.<BR>Results: Neither the distance parameters of protrusive and lateral excursion nor open-close movement showed any statistically significant difference between the initial and subsequent records (paired t-test). Although five subjects eventually revealed TMD symptoms during the three-year-period, there was no distinctive parameter that predicted the symptoms from the initial data.<BR>Conclusions: Since mandibular movement is thought to be a reliable parameter in non-TMD subjects, mandibular movement recording has been confirmed to be of use to evaluate the functional changes. However, it is difficult to predict possible changes in mandibular function from mandibular movement analysis alone.

Journal

  • Nihon Hotetsu Shika Gakkai Zasshi

    Nihon Hotetsu Shika Gakkai Zasshi 47(2), 326-334, 2003-04-10

    Japan Prosthodontic Society

References:  24

Cited by:  1

Codes

  • NII Article ID (NAID)
    10010529459
  • 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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