The principle of cold light whitening lies in the penetration of drugs into the tooth tissue through cold light to achieve the whitening effect. It is one of the chemical bleachings It is a type of chemical bleaching. Exogenous pigmentation and endogenous hyperpigmentation are suitable for the use of cold light whitening.

After the patient has completed the treatment, the following should be noted:

(1) Within 24 hours after the treatment, teeth can be easily re-stained with colored substances. You must avoid drinking tea, coffee, cola, red wine, berry drinks, colored toothpaste, mouthwash, etc. and eating dark-colored food, as well as avoiding smoking. Avoid smoking. This will make your teeth whiter for longer.

(2) The bleaching of the gum margin may occur in some teeth after the whitening procedure. In addition In addition, because teeth are layered during development, at the end of the treatment, due to the different levels of enamel penetration in each part, there will be There is delamination that occurs, which is more obvious in patients with fluorosis. However, this phenomenon gradually returns to its natural state within 24 hours, as the whitening agent is applied to the enamel at the end of the treatment. This is because the whitening agent remains in effect for 2.14 hours after the treatment has been completed.

(3) There are a few patients with severe tetracycline teeth who experience a rebound in shade about two days after the first treatment. After the second treatment, the whitening effect will be more stable.