Tabe Hideki, Ueda Hiroshi M, Kato Masaaki, Nagaoka Keiko, Nakashima Yoshiko, Matsumoto Eka, Shikata Noriko, Tanne Kazuo
Department of Orthodontics and Craniofacial Developmental Biology, Hiroshima University Graduate School of Biomedical Sciences, Hiroshima, Japan.
Angle Orthod. 2005 Jul;75(4):616-24. doi: 10.1043/0003-3219(2005)75[616:IOFAOM]2.0.CO;2.
The purpose of the present study was to investigate the influence of an activator appliance and a spring active appliance on masticatory muscle activity by means of electromyography (EMG). Twelve adult males with good general health were recruited as subjects. Three functional appliances were used in each subject for long-period EMG recording during daytime and sleep and short-time EMG recording during voluntary biting. Following findings were obtained. (1) The activity of all muscles was greater during biting than during daytime and sleep, (2) the muscle activities tended to increase in the digastric muscle and to decrease in the temporal muscle with activators under all conditions, and (3) the temporalis-masseter ratios became lower with the biting use of appliances. Therefore, this study suggests that functional appliances should be used during sleep and during the day in combination with voluntary biting to achieve adaptation and development of the masticatory muscles.
本研究的目的是通过肌电图（EMG）研究一种激活器矫治器和一种弹簧激活矫治器对咀嚼肌活动的影响。招募了12名身体健康的成年男性作为受试者。在每位受试者身上使用三种功能性矫治器，分别用于白天和睡眠期间的长时间肌电图记录以及自主咬合期间的短时间肌电图记录。获得了以下研究结果。（1）所有肌肉在咬合时的活动都比白天和睡眠时更强，（2）在所有条件下，使用激活器时，二腹肌的肌肉活动倾向于增加，颞肌的肌肉活动倾向于减少，并且（3）随着矫治器在咬合时的使用，颞肌-咬肌比值降低。因此，本研究表明，功能性矫治器应在睡眠期间和白天结合自主咬合使用，以实现咀嚼肌的适应和发育。
