咀嚼時の舌運動と下顎運動の協調性に関する研究  [in Japanese] Tongue Motor Behavior and Mandibular Movement in Chewing  [in Japanese]

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Author(s)

    • 服部 真幸 HATTORI Masayuki
    • 北海道医療大学歯学部歯科補綴学第1講座 Department of Removable Prosthodontics, Health Sciences University of Hokkaido, School of Dentistry
    • 越野 寿 KOSHINO Hisashi
    • 北海道医療大学歯学部歯科補綴学第1講座 Department of Removable Prosthodontics, Health Sciences University of Hokkaido, School of Dentistry
    • 平井 敏博 HIRAI Toshihiro
    • 北海道医療大学歯学部歯科補綴学第1講座 Department of Removable Prosthodontics, Health Sciences University of Hokkaido, School of Dentistry

Abstract

To elucidate the relationship between tongue motor behavior and mandibular movement in chewing, the tongue and mandibular movements of 8 healthy, fully dentate males were analyzed with and without an experimental lingual plate (ELP) while chewing 3 grams of peanuts. Moreover, masticatory efficiency was evaluated by the sieving method. Tongue and mandibular movements were recorded simultaneously by using ultrasound diagnostic equipment and MKG. From simultaneous recordings, all the chewing strokes from the first to the last were measured by a digitizer and calculated for the cycle time of tongue and mandibular movement.<BR>The results were as follows:(1) The masticatory efficiency immediately after ELP insertion decreased significantly compared to that of before insertion of ELP in all subjects (p<0.01).(2) The cycle times of tongue and the mandibular movements were significantly longer compared to those of before insertion of ELP in all subjects (p<0.01).(3) The masticatory efficiency, cycle time of tongue and the mandibular movements with insertion of ELP gradually recovered to the levels prior to insertion of ELP.(4) The correlation coefficient between the cycle time of tongue movement and that of mandibular movement was statistically significant (p<0.01).<BR>It was suggested that the lack of harmony in tongue and mandibular movements causes decreased masticatory efficiency.

Journal

  • Nihon Hotetsu Shika Gakkai Zasshi

    Nihon Hotetsu Shika Gakkai Zasshi 44(1), 129-137, 2000-02-10

    Japan Prosthodontic Society

References:  40

Cited by:  1

Codes

  • NII Article ID (NAID)
    10008154780
  • 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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