Evaluation of elderly denture wearers in function by Stomatognathic Analyzing system.

为了量化老年全口义齿佩戴者咬合期咀嚼肌活动量，我们尝试开发了由肌电图和下颌运动仪（MKG - K6-I）组成的测量分析系统。在设置的位置阈值下识别出遮挡相位，垂直距离为2mm。同时测量叩击运动下咀嚼肌肌电图和下颌运动，综合肌电图可量化咬合期咀嚼肌活动量1。在叩击动作下，闭塞期肌肉活动占总肌肉活动的比例约为70-80%。采用该系统对全口义齿佩戴者的咀嚼肌活动和咬合力进行散点图分析。利用散点图的功率曲线和二次曲线选择了两种曲线回归。两次曲线回归得到的咬合力值误差约为实际值的10%。1995年，我们尝试开发了使用三个测压元件的三维咬合力装置，并可以制作三维咬合力测量试验装置。该测量系统经校正系数，误差在5%以内。可以测量3例老年全口义齿佩戴者在咬合2.5秒时三维咬合力的方向和大小。

In quantifying the amount of masticatory muscle activities at the occluding phase in elderly complete denture wearers, we tried to develope the measuring and analyzing system composed of electromyograph and Mandibular kinesiograph (MKG K6-I). The occluding phase was recognized under the setting positional threshold value up to 2mm vertically.Masticatory muscular electromyogram and mandibular movement under the tapping movement could be simultaneously measured, and the amount of masticatory muscle activities in the occluding phase could be quantified from the integrated EMG.1.The ratio of muscular activities in the occluding phase was about 70-80% of total muscle activities under the tapping movement.2.Scatter diagrams were obtained from masticatory muscle activities and biting force in each complete denture wearers using this system.Two curvilinear regression were elected by the power curve and quadratic curve of the scatter diagram.The error in the value of the biting force obtained by two curvilinear regression was about 10% of actual values.In 1995, we had been tried to develope the three-dimensional bite force device using the three load cells, and could manifactured for trial the three-dimensional bite force measurement.1.The error of this measurement systme was within 5% by the coefficient for correction.2.The direction and the magnitude of three-dimensional bite force could be measured during clenching at period of 2.5 sec in three elderly complete denture wearers.