Rotten teeth is called dental caries, dental caries cavities are extremely easy to accumulate food debris, and these food debris is not easy to clean by brushing, the oral cavity is a bacterial environment, food debris retained in the cavity is equivalent to bacterial food, bacteria use them to produce acid fermentation, the formation of necrotic substances to become the source of odor. Once found tooth decay should be as early as possible to the dental specialist, the doctor will use professional tools to remove the decayed tooth tissue, clean up the bacteria and odor material, and according to the different degree of tooth decay for the appropriate treatment, the degree of tooth decay is relatively shallow and did not cause tooth pain, you can use the filling material directly to fill the cavity. If the tooth has rotted deeply enough to cause spontaneous pain or some symptoms of periapical inflammation, treatment is required. After treatment, the cavity will be plugged, and the odor will be removed naturally after these decayed or rotten teeth are treated correctly and effectively.