Tooth decay generally refers to the tooth decay, which is also commonly known as tooth decay. Tooth decay is mainly due to the demineralization of hard tissues of teeth caused by bacterial infection and the decomposition of organic matter, which finally leads to the blackening of the surface of teeth and the formation of cavities. The etiology of tooth decay mainly has four points, which are bacteria, environment in the mouth, host, and time. If tooth decay is found, it is recommended to visit the hospital in time, so that the doctor can carry out specialist treatment to remove the decayed and necrotic tooth tissue, and then use the special dental filling material to fill the decayed and necrotic part of the tooth tissue.