顎関節症患者における咬頭嵌合位の咬合所見と顎関節MRI所見の関連について  [in Japanese] Comparison between Occlusal Findings in the Intercuspal Position and Temporomandibular Joint Magnetic Resonance Imaging Findings in Temporomandibular Disorders Patients  [in Japanese]

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Author(s)

    • 櫻井 直樹 SAKURAI Naoki
    • 新潟大学大学院医歯学総合研究科摂食機能再建学 Division of Removable Prosthodontics, Niigata University Graduate School of Medical and Dental Sciences
    • 河野 正司 KOHNO Shoji
    • 新潟大学大学院医歯学総合研究科摂食機能再建学 Division of Removable Prosthodontics, Niigata University Graduate School of Medical and Dental Sciences
    • 小林 富貴子 KOBAYASHI Fukiko
    • 新潟大学大学院医歯学総合研究科顎顔面放射線学 Division of Oral and Maxillofacial Radiology, Niigata University Graduate School of Medical and Dental Sciences

Abstract

目的: 本研究では, 顎関節症患者の咬頭嵌合位における咬合状態と顎関節MRI診断による顎関節症患者の病態との関連について明らかにすることとした.<BR>方法: 被験者は患者群として顎関節症患者30名と対照群として顎関節症状を自覚していない本学学生29名とした.被験者は顎関節MRI診断によって非復位性円板転位, 復位性円板転位, 円板位置正常の3群に分類した.咬合状態の評価は, 咬頭嵌合位における接触歯数をオクルーザルレジストレーションストリップスとブラックシリコーンを用いて分析した.咬頭嵌合位における咬合力を咬合力測定用感圧フィルムデンタルプレスケール50Htype Rを用いて分析した.<BR>結果: 顎関節症患者の咬頭嵌合位の咬合状態とMRIによる顎関節部病態診断を比較した結果, 以下の結果を得た.1.全歯列の接触歯数は, 非復位患者群が正常対照群と比較して有意に少なかった.前歯部でも同様の傾向であった.2.全歯列の咬合力は, 非復位患者群が, 復位対照群および正常対照群と比較して有意に小さかった.前歯部の咬合力も同様の傾向であった.3.大臼歯部に対する前歯部の咬合力比は, 非復位患者群が正常対照群と比較して有意に小さかった.<BR>結論: 顎関節症患者の咬頭嵌合位の咬合状態と顎関節部のMRIによる病態とは関連がある.

Purpose: This study investigated the relation between magnetic resonance imaging (MRI) findings and occlusal condition of the intercuspal position in temporomandibular disorders (TMD) patients.<BR>Methods: Thirty TMD patients, and 29 control subjects, were selected for this study. Occlusal contacts and occlusal bite force in the intercuspal position were determined with occlusal registration strips, black silicon (bite checker), and Dental Prescale 50 H type R (pressure sensitive sheet), respectively. The subjects were divided into three groups based on MRI assessments: disk displacement with reduction (DDWR), disk displacement without reduction (DDWOR), and normal subjects.<BR>Results: The number of teeth with occlusal contact in the intercuspal position of the DDWOR TMD patients group was lower than in the normal control group. The number of teeth with occlusal contact on the anterior teeth showed a similar tendency. The total occlusal bite force in the intercuspal position in the DDWOR TMD patients group was lower than in the DDWR control group and the normal control group. The occlusal bite force on anterior teeth in the intercuspal position showed a similar tendency. The ratio between anterior teeth and molars occlusal bite force in the intercuspal position in the DDWOR TMD patients group was lower than in the normal control group.<BR>Conclusions: There is some relation between MRI findings and occlusal condition of the intercuspal position in TMD patients.

Journal

  • Nihon Hotetsu Shika Gakkai Zasshi

    Nihon Hotetsu Shika Gakkai Zasshi 45(4), 476-485, 2001-08-10

    Japan Prosthodontic Society

References:  38

Codes

  • NII Article ID (NAID)
    10008629909
  • NII NACSIS-CAT ID (NCID)
    AN00197911
  • Text Lang
    JPN
  • Article Type
    ART
  • ISSN
    03895386
  • Data Source
    CJP  J-STAGE 
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