Black stains on teeth can be removed by ultrasonic scaling, periodontal scaling, sandblasting and cold light whitening according to your actual condition. 1. ultrasonic scaling: through the high-frequency vibration of ultrasonic waves to clean the surface of the teeth, can effectively remove the black pigmentation, but also can effectively improve plaque, calculus and other dental problems. 2. periodontal scaling: periodontal scaling is usually done by hand, using the periodontal scaling method. 2. Periodontal scaling: Periodontal scaling is generally a treatment method of removing periodontal calculus by using hand-operated periodontal scaling instruments, which can be used for the removal of subgingival calculus. 3. sandblasting: sandblasting refers to spraying salt sand on the surface of teeth or maxillofacial fossa and fissures, etc. Under the pressurized effect of sandblasting, the salt sand reacts with the dirt on the surface of the teeth to remove the black dirt on the surface of the teeth and its surrounding. 4. cold light whitening: the treatment is generally used to remove periodontal calculus using hand-operated periodontal scaling instruments. 4. Cold light whitening: cold light whitening belongs to a relatively safe method of cleaning black stains on the teeth, generally through the whitening medication on the teeth, and then through the cold light irradiation, and then achieve rapid removal of surface stains on the teeth and whiten the teeth of the role. Daily to maintain good oral hygiene, frequent brushing, avoid eating too much coffee, strong tea, chocolate and other pigmented foods.