Li J, Dun C, Wang Y
Faculty of Dentistry, Tianjing Medical College.
Zhonghua Kou Qiang Yi Xue Za Zhi. 1995 Mar;30(2):92-4, 128.
The aim of this investigation was to study the EMG of masseter of edentulous patients in chewing cycle. 18 subjects were examined by Disa-2000M Neuro-electromyograph. It was found that the period of chewing cycle of the patients with complete denture was distinctly longer than that of normal people, and the change of the duration prolongs the time phases. The velocity was relatively slow when trying to keep the stability of dentures. The amplitude of potential in masseter was lower in chewing cycle, but it did not affect the function of mastication. The abnormal pause after occlusal contact of denture had an influence on the function of mastication.
本研究旨在探讨无牙颌患者咀嚼周期中咬肌的肌电图。采用Disa - 2000M型神经肌电图仪对18名受试者进行检测。结果发现，全口义齿患者的咀嚼周期明显长于正常人，且持续时间的变化延长了各时相。在试图保持义齿稳定时速度相对较慢。咬肌在咀嚼周期中的电位幅度较低，但不影响咀嚼功能。义齿咬合接触后的异常停顿对咀嚼功能有影响。
