There are black spots on teeth, the specific reasons are as follows: 1, pigmentation: the sulcus point gap on teeth is more obvious, usually love to drink strong tea, coffee and other colored food and drinks, also lead to sulcus point gap will have pigmentation, this kind of black spots can be removed by scaling; 2, dental caries: the occurrence of tooth decay, that is, dental caries, refers to the teeth due to bacteria, diet, oral environment and other factors, resulting in dental hard The chronic and progressive destruction of the tissue. The main treatment method of tooth decay is to fill the cavity, the patient will visit the hospital and let the doctor use the special turbine to remove the decayed and necrotic tooth tissue, and then use the filling material to fill the cavity.