“我这牙齿用冷水漱口时总酸疼得厉害。吃水果与雪糕更受不了。”这是许多人都曾相过的抱怨医学上称为牙齿感觉过敏症,俗称牙过敏症。 我们知道,人的牙齿由牙釉质、牙本质、牙骨质和牙髓所组成。牙釉质在牙冠的最表层,是人体中最硬的组织;牙骨质在牙根的最表层,硬度与厚度都远不及牙釉质;牙釉质与牙骨质的内层是牙本质,它围成容纳牙髓的髓腔。由于来自牙髓的神经末稍广泛分布在牙本质之中,所以当牙釉质耗损,牙本质暴露的时候,牙齿受到外来刺激就会产生酸痛感觉。像牙面的磨损、崩缺、龋坏等。还有,牙 “When I was gargle with cold water, my teeth ached a lot and I could not bear fruit and ice cream any more.” This is what many people have complained about as medical hypersensitivity called tooth hypersensitivity. We know that human teeth consist of enamel, dentin, cementum and pulp. Enamel in the crown of the most surface, is the body's hardest tissue; cementum in the root of the surface layer, hardness and thickness are far less than enamel; enamel and cementum is the dentin inner layer Into the pulp to accommodate the marrow cavity. Since the nerve endings from the pulp are widely distributed in the dentine, when the enamel is worn out and the dentin is exposed, the teeth are subjected to external stimuli to produce a sore feeling. Teeth wear, collapse, caries and so on. Also, teeth