Dental calculus can be removed by subgingival scaling and supragingival scaling. 1. Subgingival Scaling: When calculus and plaque appear under the gums, the doctor will use a scaler to remove the calculus from the top of the gums, and after the calculus is removed cleanly, it is necessary to use instruments for root planing to remove the softened parts of the gum surface, and finally it is necessary to follow the doctor’s instructions to rinse the periodontal pockets with a 3% hydrogen peroxide solution. 2. Gingival scaling: gingival scaling refers to the use of ultrasonic scaler or hand scaler to remove calculus and plaque bacteria on the gums, for example, the doctor will use ultrasonic scaler in the calculus attached to the site of back and forth, which can use ultrasonic waves will be shattered, and will be rinsed out of the calculus. If there is pigmentation on the teeth, it can be treated by sandblasting or polishing. It is recommended that patients need to consult a doctor in a timely manner, and the doctor will choose the appropriate measures for treatment according to the patient’s condition. In addition, patients should avoid sucking or licking the root of the tooth for 1 week after removing the calculus.