An evaluation method of gnathostomatologic function in partially edentate mouth and changes in prosthodontics.

随着人类年龄的增长，为了重建部分牙列的合理咬合关系，研制了一种生理可调节的人工磨牙，并应用于临床。为了评估临床结果，我们使用了一种复杂的计算机化研究设备来监测患者的下颌运动和咀嚼肌活动，并将肌电图和功能负荷准确地联系在一起。并对部分无牙颌患者进行定期分析，观察人工咬合面大小和形状变化的影响，并参考残牙脊形态与相对残牙形态的形态学关系。这些结果以前也报道过。在此基础上，对部分缺牙病例的支持能力变量的重要性进行了评价。用I-EMG值评价两组患者带假牙和不带假牙最大咬合时的支撑能力。本实验以上述系统为指标，分析各咀嚼周期模式的意义，作为口腔功能变化的指标。研究结果如下：植入义齿后，咀嚼周期模式发生改变，其椭圆周期的垂直直径比未植入义齿时增大。2. 额平面的总闭合角和开口角随着义齿的植入而增加，但在义齿植入几个月后，这一趋势在无义齿咀嚼时仍然存在。3. 在后区建立稳定的咬合支持后，咀嚼肌的协调模式和颞叶左右侧肌肉活动的相关系数在闭合期得到明显调节。

Caused to reconstruct rational occlusal relation in partially edentation followed course of human aging, a physiologically adjustable artificial molar teeth has been developed and applied in clinical cases. For the evaluation of clinical results,a sophisticated computerised research equipment to monitor patient's jaw movements and masticatory muscle activities on EMG and functional loads to relate together accurately,was competed.And the partially edentate patients with and without denture were analysed in periodical termk Also the effects of changes the size and shape of artificial occlusal surfaces were observed,with reference to morphological relation of the residual ridge form and opposing remaining teeth. These results were reported before. Then the importance of variabilities of supporting abilities in partially edentate cases was assessed. An evaluation of supporting abilities was assessed in I-EMG value at maximal clenching with and without denture for the cases. In this experiment, as indices of changes on gnathostomatological functions, signification of each masticatory cycle pattern was analysed by above-mentioned system. The results as follows: 1. The masticatory cycle patterns were changed by denture insertion,vertical diameter of elliptical cycle became longer than that of without denture. 2. Total angle of closing and oppening in frontal plane increased with denture insertion,though when after a few month denture insertion this tendency was remaining at the mastication without denture. 3. When after esterblishing stable occlusal support in posterior area,the masticatory muscle coordination pattern and coefficient correlation between left and right side of the muscle activities of tempolaris at closing stage were markedly regulated.