Evaluation of Denture Function of Elderly Denture Wearers by Using System for Measurement and Analysis of Biting Force and Pressure Distribution

对老年义齿患者的义齿功能进行评价是非常重要的。为了进行这项研究，我们开发了一套计算咬合力和义齿下压力分布的系统。该系统由肌电图仪、力传感器、压力传感器、动态应变放大器和计算机数据分析系统组成。利用该系统同时记录并分析了3名全口义齿患者的咬合力、肌电和压力分布。用四个电极引导左右前颞肌和咬肌的肌电图。通过连接在下颌双义齿基托表面的7个压力传感器测量支撑组织上的压力分布。在调整总义齿的咬合之前，它被认为是分散压力分布的。综合肌电的咬合力较低，但调整咬合后，咬合力呈反向分布。随着咬合调整的进行，人们认识到全口义齿的承载能力和咬合力都有所增加，与老义齿相比，老年患者的新义齿具有更高的咬合力和更均匀的压力分布。

It is very important to evaluate the denture function of elderly denture patient. In order to perform for this study, we have developed a system of the calculating the biting force and the pressure distribution under the denture.This system consists of many components which have an electromyograph, a force transducer, a pressure sensor, a dynamic strain amplifier and computerized data analysis system.The biting forces, electromyograms and pressure distributions in three complete denture patients were recorded simultaneously and were analyzed by using this system.Electromyograms of the right and left anterior temporal and masseter muscles were led by four electrodes.Pressure distribution on supporting tissue were measured by seven pressure transducer attached to the basal surface of the duplicated mandibular denture.Before occlusal adjustment of the complete denture, it was recognized to disperse pressure distribution. The biting force from intergrated EMG were low degree.However, after occlusal adjustment it was indicated to converse pressure distribution. The biting force was also high degree.By proceeding of the occlusal adjustment, it was acknowledged that load supporting capacity and biting force in complete denture wearers had increased.Compared with old denture, new denture in an elderly patient showed high biting force and displayed adequate distribution of pressure.