Regular and moderate scaling is good for teeth, too frequent scaling may harm teeth. 1. Regular scaling every year can remove calculus, plaque and soft tartar on the surface of the teeth, and the surface of the teeth becomes cleaner after scaling, which improves the oral environment and prevents oral diseases such as periodontitis and gingivitis. Scaling removes the pigmentation on the surface of the teeth, plaque, etc., and the teeth look whiter after scaling. 2. Too frequent scaling, easy to damage the enamel, exposure of dentin, so that the teeth become more sensitive, the teeth are prone to eating and drinking in the future, such as soreness, tingling and other discomfort. Frequent scaling and improper operation may also damage the hard tissues of the teeth, resulting in loose teeth. Therefore, it is recommended that people should pay attention to scaling, but the annual scaling 1-2 times can be, the number of times should not be too much, scaling should go to the regular dental hospital.