Why teeth turn yellow?

First, because we see the color of teeth is not only the color of the tooth surface, but also show through the enamel surface of teeth out of the dentin color. Enamel color is white translucent, revealing the yellow dentin color bias. When you feel the color of your teeth is not white, a lot of cases because of your relatively high degree of mineralization of enamel, enamel color bias in the transparent color, in fact, the teeth would be more robust.

Dental hospital doctors said, resulting in tooth color, yellow for many reasons, generally divided into endogenous and exogenous two:

Stain is due to the existence of a variety of tooth surface bacteria, they secrete a number of adhesive on the tooth surface material, the diet tea dirt, smoke stains, and drinking water dental instruments in some of the minerals and minerals in the saliva of people adsorbed on these sticky substances on the formation of plaque and tartar, the teeth gradually turn yellow or black.

Endogenous color is formed in the process of tooth development, such as tetracycline deposition in dentin, could make the teeth yellow, brown or dark gray, as tetracycline; if too much fluoride in drinking water may also lead to dental fluorosis, teeth appear before the white startling color, brown patches; if pulp necrosis, the bacteria break down the pulp of the metabolites, as well as Fixed dentures and denture which is better dehydration can make their teeth discoloration of the teeth.

Exogenous coloring needs are usually clean teeth through tooth can restore the original color. The endogenous color, often covered through chemical bleaching or whitening to complete. Teeth whitening methods is essentially only two, one is chemical bleaching, the other is covered with white. Reduction qualities of the teeth scaling, teeth cleaning, teeth whitening can not be considered strictly speaking.