There is no way to whiten teeth, and if the patient is referring to scaling, also called a full mouth cleaning, the cost is around$330. May be small clinics will be slightly cheaper, however, disinfection is not guaranteed, to the regular hospital for teeth cleaning, the patient’s oral health is still more favorable, and the price is not expensive. If the patient does not only want to clean the teeth, but also want to whiten, the cost will be slightly higher, whitening charges in about 2000 yuan. The main method of whitening is through cold light irradiation, and in the surface of the teeth coated with 30% hydrogen peroxide gel, hydrogen peroxide has the effect of whitening teeth, through the cold light can be accelerated, to strengthen the effect of whitening, this whitening effect can be maintained in about 3 years, 3 years later the teeth will return to their original color.