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A Study on Pressure Distribution of Supporting Tissues under Upper Complete Denture

上颌全口义齿下支撑组织压力分布的研究

基本信息

批准号：
62480391
负责人：
MATSUMOTO Naoyuki
金额：
$ 2.82万
依托单位：
Tokushima University
依托单位国家：
日本
项目类别：
Grant-in-Aid for General Scientific Research (B)
财政年份：
1987
资助国家：
日本
起止时间：
1987 至 1988
项目状态：
已结题

项目摘要

Impedance grid pressure sensor was used to measure the pressure distribution over supporting tissues under upper complete denture. Through simulation method with this sensor, the influences of occlusal force loading point, arrangement of posterior artificial teeth, and denture base material on pressure distribution over supporting tissues under complete denture were studied. The results were as follows:1. Pressure distribution over supporting tissues showed remarkable variation according to the position of the occlusal force loading point.2. In the case of the buccally shifted arrangement , pressure distribution on the palate was more dispersed in comparison with standard arrangement and total pressure increased.3. In the case of the lingually shifted arrangement, pressure distribution on the palate was greater in comparison with standard arrangement. There was increased in total pressure but maximum pressure was reduced.4. Pressure distribution on the palate of metal plate denture ,especially in the oblique region of the palate was greater in comparison with resin plate denture, and maximum pressure was reduced. Where loading point is on the alveolar ridge , pressure distribution on the palate of matal plate denture was greater than that of resin plate denture. These results taken together suggest that buccally shifted arrangement of posterior artificial teeth in upper complete denture was undesirable. If arrangement of posterior artificial teeth deviates from standard, denture base should be fabricated with metal base.

采用阻抗网格压力传感器测量上颌全口义齿支撑组织的压力分布。通过该传感器的仿真方法，研究了全口义齿下咬合力加载点、后牙义齿排列方式和义齿基托材料对支撑组织压力分布的影响。实验结果如下：1.实验结果表明：牙合力加载点位置不同，支撑组织压力分布也有显著差异。2 .上颚移位布置时，上颚压力分布较标准布置更加分散，总压力增加。在舌移排列的情况下，上颚的压力分布比标准排列更大。总压力增大，最大压力减小。金属板义齿与树脂板义齿相比，上颚压力分布更大，尤其是上颚斜区压力分布更大，最大压力降低。当加载点在牙槽嵴上时，金属板义齿的上颚压力分布大于树脂板义齿。综上所述，上颌全口义齿后牙的下颌移位是不可取的。若后牙排列偏离标准，应采用金属基托制作义齿基托。