Comparison of First Jaw Motor Performance between Bite Task at Anterior and Posterior Teeth

DOI Web Site 参考文献12件 オープンアクセス
  • Mai Ikuta
    Division of Oral Function and Rehabilitation, Department of Oral Health Science, Nihon University School of Dentistry at Matsudo, Matsudo, Chiba 271-8587, Japan
  • Takashi Iida
    Division of Oral Function and Rehabilitation, Department of Oral Health Science, Nihon University School of Dentistry at Matsudo, Matsudo, Chiba 271-8587, Japan
  • Hidetoshi Hayakawa
    Nihon University Graduate School of Dentistry at Matsudo, Oral Function and Rehabilitation, Matsudo, Chiba 271-8587, Japan
  • Osamu Komiyama
    Division of Oral Function and Rehabilitation, Department of Oral Health Science, Nihon University School of Dentistry at Matsudo, Matsudo, Chiba 271-8587, Japan

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説明

<p>This study aimed to compare bite force and masticatory muscle activity between anterior and posterior teeth during first jaw motor performance.</p><p>Twenty-six participants performed two biting tasks; one at the anterior teeth(ATB)and one at the right first molar(PTB). The tooth bite task consisted of three force levels(20%,</p><p>40% and 60% maximum voluntary contraction(MVC)). Before measurement, participants performed a maximum tooth bite on a force meter to determine the 100% MVC at the anterior and posterior teeth. During all tasks, electromyographic(EMG)activities were recorded from the left and right masseter muscles, and left and right temporalis muscles and bite force were recorded. The variability at each target force level and for each jaw motor task was determined as the coefficient of variation(CV)of the actual bite force activity and EMG activities.</p><p>Actual bite force values and EMG RMS amplitude in each muscle were significantly dependent on target force level during ATB and PTB(P<0.01). CV values of actual bite force level in each jaw motor task were not significantly dependent on target force level or biting task. EMG RMS amplitude during ATB and PTB were significantly dependent on force level(P<0.01). In conclusion, our findings suggest that force control of first jaw motor performance did not vary between anterior teeth and posterior teeth. In addition, the present study suggests that the mechanism of force control with regard to jaw movements contributes masticatory muscle activity and periodontal receptors.</p>

収録刊行物

  • ＩＪＯＭＳ

    ＩＪＯＭＳ 18 (1), 15-21, 2018-06-24

    日本大学松戸歯学部 口腔科学研究所

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