老年人牙列面重度磨损,常使牙尖磨平,牙冠变短,咬垂直距离较前减低。随着磨损的加剧,牙本质外露,继而出现牙质过敏和食物嵌塞,重者影响咬,甚至还可导致一系列的牙髓、关节等症状。为了防止磨损的继续加重,过去有采用 Elderly dentition face severe wear and tear, often smooth the cusp, crowns shorter, lower bite vertical distance than before. As the wear and tear aggravate, the dentin exposed, followed by dentition hypersensitivity and food impaction, severe cases affect the bite, and even can lead to a series of dental pulp, joint and other symptoms. In order to prevent wear to continue to increase, in the past have adopted