Tooth enamel is not a disease, but an anatomical structure on a normal tooth, which is the hardest tissue structure in the body. The hard tissues of the teeth are generally divided into enamel, dentin, and bone. Therefore, tooth enamel is not a disease. Enamel is the outermost tissue structure of the tooth and is mainly characterized by being very hard. The color is usually colorless and translucent. If the tooth is not well protected, the enamel can develop diseases. For example, caries, enamel hypoplasia, etc. are destroyed enamel, and enamel is generally the first tissue structure of teeth to develop disease. Enamel is very hard and once it is destroyed, then the whole tooth is destroyed very fast. Because the hardness of dentin is much less than that of enamel. Therefore, generally speaking, tooth decay is actually a small cavity on the surface, but in fact, the inner part is already very bad. It is very critical to prevent the disease of tooth enamel, because the disease of tooth tissue is caused by bacterial infection. Bacteria attach to the teeth and destroy the teeth, and it becomes caries. The main way to prevent the occurrence of caries is to control the bacteria to attach on the teeth, the main method is to brush the teeth, to master the correct way of brushing and to develop the good habit of brushing the teeth.