Sandblasting and scaling, which is less harmful to teeth, can not be unified, because both have their own advantages and disadvantages, as follows. 1. Sandblasting: is through the sandblasting machine, combined with high-pressure impact to make the teeth plaque and tobacco stains removed, so that the teeth to restore the beautiful white state. In the sandblasting process, there may be a slight pain, or cause local bleeding, but generally not serious. 2. Scaling: The professional term is supragingival scaling, which mainly utilizes a scaler to remove calculus, plaque, and pigmentation on the surface of the overlying teeth. It can restore the whiteness of the teeth and make them smooth. During the scaling process, there will be tooth sensitivity or mild pain, and the gums tend to bleed, but it is usually not serious. Regarding which one to choose, sandblasting or scaling, the decision should be made on an individual basis, but under the guidance of a physician.