How to Whiten Yellow Teeth

Tooth staining and yellowing can be roughly divided into two aspects, namely endogenous and exogenous. Endogenous coloration is formed during tooth development. For example, tetracycline is deposited in dentin, which will make teeth yellow, brown or dark gray, called tetracycline teeth; if there is too much fluoride in drinking water, it may also be Causes dental fluorosis, a white chalk-colored, tan-colored plaque on the tooth surface, which can also turn teeth black if the nerve necrosis of the tooth combines with bacterial breakdown products. Exogenous coloration is due to the existence of a variety of bacteria on the surface of the teeth, which secrete many sticky substances. The tea scale, tobacco stains in the daily diet and certain minerals in the drinking water are adsorbed on these sticky substances, gradually making the teeth. yellow or black.