Black tartar may be caused by pigmentation, dental caries, dental calculus, etc. Patients can follow the doctor’s instructions to remove it through cold light whitening, resin filling and ultrasonic scaling. 1. Hyperpigmentation: If patients often drink coffee, strong tea and other beverages containing melanin, it is easy to leave pigment on the teeth. Patients can improve by brushing their teeth correctly and use ultrasonic scaling in severe cases. You can also follow the doctor’s advice to choose cold light whitening, through the optical treatment, so that the tooth surface redox reaction, so as to alleviate the symptoms of black tartar. 2. Dental caries: If the patient’s oral cleaning is not in place, bacteria will attack the tooth tissue, resulting in dental caries. At this time, you need to follow the doctor’s instructions to grind away the decayed tissue, and then resin filling. 3. Calculus: If the teeth are attached to the calculus, plaque, etc., generally through the ultrasonic high-frequency vibration, the calculus will be shattered, so as to eliminate the black tartar on the teeth. It is recommended that patients usually pay attention to oral hygiene, timely visit the hospital dentistry, under the guidance of the doctor to choose the treatment of treatment.