Periodontal scaling (that is, people often say scaling) is the main purpose is to remove plaque, tartar attached to the junction of teeth and gums, to remove local pathogenic factors, so that the damage to the gums to stop the development of the gums to a relatively healthy state, so that the teeth to restore the natural color, but one thing that needs to be clarified is that scaling is different from bleaching, which can not remove the pigmentation of the teeth inside the tooth, is not the true meaning of teeth whitening. Some pigments such as tobacco stains and tea stains are more difficult to remove with ultrasonic cleaning, and sandblasting is an option. Scaling will not destroy the teeth, but patients who have just finished scaling treatment, the sensitivity symptoms are quite obvious, you should pay attention to avoid using too cold, too acidic and other stimulating food in the near future. Scaling and root planing on top of scaling are necessary treatments for periodontal therapy.