A Study of Occlusion and Tooth Mobilty of Elderly People

随着年龄的增长，老年人的牙齿脱落，牙齿保健能力下降，很难保持剩余牙齿的牙齿健康。牙齿的位置和咬合关系是保持其余牙齿处于咬合接触点的重要因素。我们检查了老年人的咬合关系，并根据Eichner分类法将其分为三组。结果表明：1）随着咬合支持面积的减小，接触点面积和咬合力的平均值也随之减小; 2）老年人的骨吸收指数为20-39%; 3）对于上牙，有牙合支持的牙齿松动度指数小于无牙合支持的牙齿松动度指数，牙合接触和牙合支持是保持其余牙齿在点的重要因素牙齿的灵活性。

It is difficult for elderly people to maintain the dental health of rest teeth, because of the loss of teeth and poor dental health care by aging. The location of teeth and occlusal relationship are important factors to maintain the rest teeth in the point of the occlusal contact. We examined the occlusal relationship of elderly people, and we divided into three groups by Eichner's classfication. Results are as follows.1) As the occlusal support area decreased, the average of the area of contact point and occlusal force decreased.2) The index of bone resorption showed 20-39% for elderly people.3) As for upper teeth, the index of tooth mobility with occlusal supports are smaller than that without them.The occlusal contact and occlusal support are important factors to maintain the rest teeth in the point of tooth mobility.