Teeth are too yellow, can be improved through scaling, cold light whitening, fillings, veneer restoration, full crown restoration and many other ways. 1. Scaling: yellowing of teeth may be due to the presence of calculus, plaque or tobacco stains and other pigmentation on the surface of the teeth, generally through ultrasonic vibration of the surface of the teeth on the way to clean the adhesion, so as to improve the phenomenon of yellowing of the teeth. 2. Cold light whitening: the normal development of the better teeth itself is yellowish, because the internal structure of the teeth is yellowish, the pathology may also be tetracycline teeth, teeth too yellow can be considered for cold light whitening to improve. 3. Dental fillings: after dental caries, the teeth may also appear black and yellow stains, so you can clean up the decayed tooth tissue and then use resin and other materials to fill the teeth, so as to improve the phenomenon of yellow teeth. 4. Veneer restoration: When the teeth have fluorosis, enamel underdevelopment and other problems, the phenomenon of yellowish color may also occur, in this case, you can go to the hospital stomatology department for dental veneer restoration to improve the problem of yellowish color. 5. Full crown restoration: When the tooth is necrotic due to trauma or apical periodontitis, the tooth loses blood supply and the color may become yellowish brown, which requires root canal treatment and then a porcelain tooth or full crown restoration.