The clinical situation of teeth with black spots is generally divided into the following two kinds: 1, exogenous pigmentation caused by black spots or black plaques on the tooth surface, in this case, generally through supragingival cleaning, sandblasting and other ways to treat, after perfect polishing, basically can be restored to the original tooth color, in this case, it is recommended that patients after treatment within a month, or even a longer period of time, try to avoid again In this case, patients are recommended to avoid eating food containing pigment, such as coffee, chocolate and other dark-colored food, to brush their teeth correctly after three meals, and to rinse their mouth immediately after drinking pigmented drinks, so that they can generally maintain a good long-term effect; 2, the black spots on teeth are actually the black spots caused by tooth decay, the treatment in this case needs to remove the black spots first, and then restore the shape and color of teeth by resin filling, the earlier the treatment, the better the long-term prognosis will be. The earlier the treatment, the better the long-term prognosis will be, but when the black spot becomes a black hole, the treatment will be more troublesome and the effect is not as good as the early treatment.