There is no tooth whitening trick in life, teeth want to become white mainly rely on medical cosmetic technology, such as scaling, laser whitening, cold light whitening, drug bleaching, veneers and other methods, at the same time should pay attention to improve living habits. 1, scaling: scaling is the most fundamental method of dental cleaning and whitening, need to have a professional dentist to operate, can effectively get rid of plaque, calculus, to avoid gum 2, laser whitening: the use of laser to remove tetracycline-induced tooth discoloration and smoke stains left after smoking, the effect is better, can make teeth white, relatively few adverse reactions; 3, cold light whitening: through cold light to penetrate the drug into the tooth tissue, can get rid of deep and superficial tooth pigmentation, to achieve the effect of whitening teeth; 4, drug bleaching: you can use 5.Veneers: The teeth can be covered by resin or porcelain material, which can also make the teeth look white, but some of the tooth tissues need to be removed, and there is some damage to the original teeth. In addition, eating more coarse fiber foods, foods rich in vitamins and calcium, such as fresh fruits and vegetables, milk, shrimp, eggs, etc., drink more water, less carbonated drinks and coffee, quit smoking and good brushing habits can help whiten teeth.