Scaling time varies depending on oral hygiene and is generally around 30-60 minutes. If it is your first visit for scaling, the scaling time is longer because of the high tartar buildup and the amount of tartar that needs to be cleaned. Scaling generally includes normal ultrasonic scaling, deep scaling, and polishing. If there is more pigmentation, sandblasting may also be performed. Finally the periodontium has to be varnished. So depending on the oral hygiene of different people, its specific time varies. It is recommended that people should have a scaling once in about 0.5-1 year. Scaling can effectively remove tartar, plaque, pigment and other irritants from the periodontium, which can effectively relieve gum bleeding, oral odor, gum swelling, and even tooth loosening and other diseases. Therefore, scaling can prevent periodontal diseases.