Enamel erosion is the corrosion of the white translucent outer layer of the crown of the tooth, the most calcified hard tissue, causing damage. When we consume foods with high acidic content for a long time, the tooth surface enamel will erode and decalcify. 1.It is caused by scaling or other medical damage causes damage. 2, there are some teeth caused by drug damage, such as tetracycline teeth. 3, long-term consumption of food containing high acidic ingredients, or sugary substances, such substances left in the mouth if not removed in time, will accelerate the loss of calcium ions or reproduce a large number of bacteria, resulting in the formation of enamel surface etch and plaque. Self-repair function is damaged. The main manifestations are tooth decay, dentin hypersensitivity and plaque.