ガム軟化前後における咀嚼運動 : 運動経路と運動リズム Chewing movements before and after softening of the gum : The path and rhythm of masticatory movement

この論文にアクセスする

この論文をさがす

著者

    • 志賀 博 Shiga Hiroshi
    • 日本歯科大学歯学部歯科補綴学教室第1講座 The Nippon Dental University, School of Dentistry at Tokyo, Department of Partial and Complete Denture
    • 小林 義典 Kobayashi Yoshinori
    • 日本歯科大学歯学部歯科補綴学教室第1講座 The Nippon Dental University, School of Dentistry at Tokyo, Department of Partial and Complete Denture
    • 王 孝 Oh Takashi
    • 日本歯科大学歯学部歯科補綴学教室第1講座 The Nippon Dental University, School of Dentistry at Tokyo, Department of Partial and Complete Denture
    • 栃倉 純 Tochikura Jun
    • 日本歯科大学歯学部歯科補綴学教室第1講座 The Nippon Dental University, School of Dentistry at Tokyo, Department of Partial and Complete Denture

抄録

咀嚼運動におけるガム軟化前後間の機能的差異を明らかにする目的で, 独自のシステムを用いて正常者10名のガム軟化前とガム軟化後における咀嚼開始後第5ストロークからの10ストロークの運動経路と運動リズムを分析した.結果は, 以下の通りである.1.開口量と咀嚼幅は, ガム軟化前の方がガム軟化後よりも大きく, ガム軟化前後間に有意差が認められた.2.開口時側方成分, 閉口時側方成分, 垂直成分の各SD/ODは, ガム軟化前の方がガム軟化後よりも大きく, ガム軟化前後間に有意差が認められた.3.中心咬合位から下方1mmに閾値設定した場合の咬合相時間の平均は, ガム軟化前の方がガム軟化後よりも短縮していたが, 開口相時間, 閉口相時間, cycle timeの各平均は, ガム軟化前の方がガム軟化後よりも延長した.4.中心咬合位から下方2mmに閾値設定した場合の咬合相時間の平均は, ガム軟化前とガム軟化後とがほぼ同じ値を示したが, 開口相時間, 閉口相時間, cycle timeの各平均は, いずれもガム軟化前の方がガム軟化後よりも延長した.5.中心咬合位から下方3mmに閾値設定した場合の開口相時間, 閉口相時間, 咬合相時間, cycle timeの各平均は, いずれもガム軟化前の方がガム軟化後よりも延長した.6.中心咬合位から下方1mm, 2mm, 3mmに閾値をそれぞれ設定した場合のcycle timeの各変動係数は, いずれもガム軟化前の方がガム軟化後よりも大きく, ガム軟化前後間に有意差が認められた.7.以上のことから, 正常者のガム咀嚼時の咀嚼運動は軟化前の方が軟化後よりも垂直的かつ側方的な運動量が大きく, また運動リズムが不安定であり, ガム軟化前後間には機能的差異のあることが明らかになった.

In order to verify the functional differences in the masticatory movement between chewing hard chewing gum and chewing softened chewing gum the path and the rhythm of the 10 strokes of the movement beginning with the fifth stroke of the mastication of 10 healthy subjects chewing chewing gum were analyzed using our own system and the following results were obtained. 1)The amount of opening and the width of mastication were larger before the chewing gum softened and a statistically significant difference was found between chewing hard chewing gum and chewing softened chewing gum. 2)Each SD/OD of the lateral and vertical components of the opening time and the closing time was larger before the chewing gum softened, and a significant difference was found between chewing hard chewing gum and chewing softened chewing gum. 3)When the threshold value was set at 1mm below centric occlusion, the average occluding time was shorter before the chewing gum softened. However, the average of opening time, closing time and cycle time were all longer before the chewing gum softened. 4)When the threshold value was set at 2 mm below centric occlusion, the average occluding time was about the same for both hard and softened chewing gum, but the average opening time, closing time and cycle time were all longer before the chewing gum softened. 5)When the threshold value was set at 3mm below centric occlusion, the average occluding time, opening time, closing time, and cycle time were all longer before the chewing gum softened. 6)Each coefficient of variation of the cycle time when the threshold value was set at 1 mm, 2 mm, and 3 mm were all larger before the chewing gum softened, and a significant difference was observed between chewing hard chewing gum and chewing softened chewing gum. 7)From the above results, it was clear that before the chewing gum softened both the vertical and lateral movements were larger and the rhythm was unstable, and that a functional difference existed between chewing hard chewing gumand chewing softened chewing gum.

収録刊行物

  • 日本顎口腔機能学会雑誌

    日本顎口腔機能学会雑誌 1(1), 45-55, 1994-12-21

    日本顎口腔機能学会

参考文献:  33件中 1-33件 を表示

被引用文献:  2件中 1-2件 を表示

各種コード

  • NII論文ID(NAID)
    110001091849
  • NII書誌ID(NCID)
    AN1047134X
  • 本文言語コード
    JPN
  • 資料種別
    ART
  • ISSN
    13409085
  • データ提供元
    CJP書誌  CJP引用  NII-ELS 
ページトップへ