Yellow teeth have a variety of reasons, may be the emergence of dental calculus, may also be the emergence of tetracycline teeth, dental fluorosis, whitening can be treated by scaling, whitening and other methods. 1. Scaling, if there are obvious symptoms of yellow teeth, caused by dental calculus, you can choose the regular medical cosmetic hospital to carry out scaling treatment, through ultrasonic scaling, can effectively alleviate the symptoms of yellow teeth. 2. whitening, patients with yellow teeth if tetracycline, dental fluorosis and other factors, you can laser whitening, cold light whitening and other physical methods to remove surface stains on the teeth, alleviate enamel damage, to achieve the effect of whitening. Patients usually must pay attention to oral hygiene, morning and evening brushing, rinsing after meals, to avoid food residue residue, the formation of tartar, but also easy to breed bacteria, causing oral diseases, it is best not to smoke for a long time, which can easily lead to yellow teeth.