Cold light teeth whitening technology is the wavelength between 480-520nanometer high-intensity blue light, through the fiber optic conduction, through two pieces of 30 multi-layer coated special optical lens, and then through special optical treatment, isolate all harmful ultraviolet and infrared, the main body of hydrogen peroxide and 20 nanometer diameter silicon dioxide whitening agent, rapid Produces oxidation reduction effect. Through the dentinal tubules, the pigments on the surface and deeper layers of the teeth are removed, thus achieving the whitening effect. The operation time of this whitening method is not very long, only 30 minutes. The low temperature cold light completely avoids the stimulation of the dental nerve during the operation. Hydrogen peroxide, the main component of the whitening agent, has been safely used for decades to decolorize teeth. With hydrophilic medication and complete absence of gum contact, the whitening process does not cause any damage to tooth structure and enamel. The one-time, non-irritating, side-effect-free whitening effect lasts for more than two years. Therefore, it is recognized as the most effective and safest tooth decoloration whitening technology at present. It can not only remove the pigmentation on the surface of the teeth, but also get into the deeper layers of the teeth to achieve the effect of decoloration. According to clinical experiments, the effect of using beyond cold light teeth whitening technology can improve 5-14 vita shades, which is not only better than similar products, but also exceeds the whitening effect of home braces by more than 30%. The operation process only takes thirty minutes, no side effects, and the whitening effect can be maintained for more than two years. Scope of application: 1, for exogenous staining of teeth, such as staining caused by coffee, soy sauce, tea, etc., the best effect of cold light whitening; 2, mild to moderate tetracycline teeth, fluorosis, or other factors caused by discolored teeth, hereditary yellow and black teeth, generally through a cold light whitening dental treatment can get satisfactory results. 3, dead pulp teeth re-colored quickly after bleaching treatment, so it is not an indication for cold light teeth whitening. Cold light whitening has no effect on the filling and porcelain crown veneer, so such patients are also not indications for cold light teeth whitening. 4.Heavy tetracycline teeth with enamel dysplasia, fluorosis, or discolored teeth caused by other factors need to be treated with cold light teeth whitening several times under the diagnosis of the doctor to get some improvement. Such patients can also be restored by means of porcelain teeth. 5, heavy tetracycline, fluorosis, or other factors caused by discolored teeth generally need more than one treatment, which is separated by half a month, in order to obtain the results that satisfy both the doctor and the patient. Generally, after the first treatment, there is an improvement of four to five shades on the colorimetric plate. But visually the change is not very significant, after the second treatment there will be at least five more shades of improvement on the results of the first treatment, and after this treatment we will see very satisfactory results.