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

为了定量测定老年全口义齿患者咬合期咀嚼肌的活动量，我们试图开发一套由肌电图仪和下颌运动记录仪(MKG K6-I)组成的测量分析系统。在设定的位置阈值下垂直于2 mm识别咬合阶段，可同时测量咀嚼肌肌电信号和敲击运动下的下颌运动，1.咬合阶段的肌肉活动量约占总活动量的70%~80%。2.利用该系统得到每个全口义齿佩戴者的咀嚼肌活动量和咬合力散点图。根据散点图的功率曲线和二次曲线选择两条曲线回归。由两条曲线回归得到的咬合力的误差约为实际值的10%。1995年，我们尝试用三个测力计研制了三维咬合力测定仪。该测量系统经校正系数误差在5%以内。2.对3名老年全口义齿佩戴者，在咬合周期为2.5s时，可测量到咬合力的三维方向和大小。

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.