Morimoto T, Abekura H, Tokuyama H, Hamada T
Department of Orai Physiology, Faculty of Dentistry, Osaka University, Japan.
J Oral Rehabil. 1996 May;23(5):336-41. doi: 10.1111/j.1365-2842.1996.tb00861.x.
The bite force and EMG activity of jaw closing muscles were studied at seven different vertical jaw positions around the occlusal vertical dimension (OVD) in 10 edentulous subjects. When the masseteric EMG activity was maintained at constant values (40% and 20% of the maximum activity at the OVD), the bite force increased in proportion to increase of the vertical dimension. On the other hand, when the bite force was maintained at constant values (4 kg and 8 kg), the EMG activities of the jaw closing muscles decreased, with an increase of the vertical dimension. These results indicate that the OVD is not the position at which the most efficient exertion of the bite force is obtained.
在10名无牙颌受试者的咬合垂直距离（OVD）周围的七个不同垂直颌位，研究了咬合力和闭口肌的肌电图活动。当咬肌肌电图活动维持在恒定值（OVD时最大活动的40%和20%）时，咬合力随垂直距离的增加而成比例增加。另一方面，当咬合力维持在恒定值（4千克和8千克）时，闭口肌的肌电图活动随垂直距离的增加而降低。这些结果表明，OVD并非获得最有效咬合力的位置。
