Tetracycline is a yellowing of the teeth that occurs when the enamel encounters tetracycline medication during the developmental stage of the tooth. Tetracycline is an earthy yellow or yellowish-brown drug that can attack the enamel causing yellowing of the teeth, and this type of drug can also be deposited on the teeth, causing them to turn yellow. More severe tetracycline teeth appear grayish brown or dark gray. The treatment for tetracycline teeth is whitening. Mild tetracycline teeth can be left untreated, moderate tetracycline teeth can be treated by decoloration or masking, and severe tetracycline teeth are heavily stained or have severe enamel loss, in which case veneers, porcelain veneers or crown restorations can be done. Tetracycline teeth are treated by means of teeth whitening, but any whitening method can only improve the condition of the teeth and cannot fully restore the normal color. At the same time, tetracycline teeth are due to tetracycline damage to tooth enamel, tooth enamel is to protect the entire tooth structure, if excessive whitening of teeth, will cause enamel loss, if there is no enamel to protect teeth, teeth for a long time in the acidic oral environment, prone to tooth brittleness and dentin allergy, tooth protection is more important than whitening. Tetracycline teeth can be relieved by whitening, but also veneers and other whitening effects.