When teeth are yellow due to plaque or calculus residue, you can go to dental scaling; teeth yellow due to fluorosis or the original color of the teeth, scaling can not be teeth whitening. 1. Some people have yellow teeth mainly because of plaque, food residue, calculus, tobacco stains, tea stains, etc., which is caused by dental ultrasonic scaling, which can remove exogenous pigments and tartar, restore the original color of the teeth, and make the teeth look whiter than before. 2. But teeth yellow is mainly endogenous coloring, by fluorosis or teeth originally color looks yellow, go to the dental scaling and can not make teeth white. But you can use dental cold light whitening, dental veneers and other technologies to change the teeth yellow, so that the teeth become white. When you want to go to the dentist to improve the problem of yellow teeth, you should choose a dentist in a regular dental hospital, and be given the right advice by a professional doctor.