Remote Facilitation of Soleus H-reflex Induced by Clenching on Occlusal Stabilization Appliances

DOI Web Site 被引用文献2件 参考文献72件 オープンアクセス
  • Naka Shinji
    Department of Sports Medicine and Dentistry, Graduate School, Tokyo Medical and Dental University
  • Takahashi Toshiyuki
    Department of Removable Prosthodontics, Graduate School of Dental Medicine Hokkaido University
  • Sumita Yosuke
    Department of Sports Medicine and Dentistry, Graduate School, Tokyo Medical and Dental University
  • Ueno Toshiaki
    Department of Sports Medicine and Dentistry, Graduate School, Tokyo Medical and Dental University
  • Ohyama Takashi
    Department of Removable Prosthodontics, Graduate School, Tokyo Medical and Dental University

書誌事項

公開日
2004
DOI
  • 10.2186/prp.3.15
公開者
公益社団法人 日本補綴歯科学会

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説明

Purpose : The purpose of this study was to examine the change in spinal cord excitability in a leg muscle during maximal voluntary clenching on a stabilization appliance.<br>Materials and Methods : The H reflex of the soleus muscle was elicited in five healthy male volunteers by electrical stimulation of the tibial nerve under the following five dental occlusal conditions : mandibular rest position (RP : control), maximum voluntary clenching in the intercuspal position (IP), maximum voluntary clenching on a hard acrylic stabilization appliance (H-SA), maximum voluntary clenching on a soft stabilization appliance (S-SA) and maximum voluntary clenching on a very soft stabilization appliance (VS-SA).<br>Results : The soleus H reflex modulations in the IP, H-SA, S-SA and VS-SA conditions were 117.6%, 119.5%, 126.2% and 133.6%, respectively. There was a significant difference between IP and S-SA, and IP and VS-SA (p=0.0001-0.0226) ; however, there was no significant difference between IP and H-SA (p=0.3412-0.9940). Significant positive correlations between the magnitude of the soleus H reflex and the masseter electromyogram activity were found in each subject (r=0.670-0.862, p<0.05).<br>Conclusion : This study demonstrated that the spinal cord excitability in the motor pathway of a leg muscle was considerably raised during clenching on a soft stabilization appliance compared to a hard stabilization appliance, suggesting that a powerful biting action on a resilient intraoral appliance strongly influences the motor system in humans.

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