The tooth surface is covered with a layer of enamel, which is transparent or translucent, and its deep layer is dentin, which is pale yellow. The color of healthy teeth is deep dentin, which is pale yellow through enamel.
Tooth stains can accelerate tooth discoloration, and pigments in coffee and tea can also change the appearance of teeth. Whether you like to drink cappuccino or tea, if you drink it often, your teeth will change color.
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Causes of yellowing of teeth
1, exogenous coloring
Exogenous coloring is due to the existence of many kinds of bacteria on the tooth surface, which secrete many sticky substances on the tooth surface. Tea stains and smoke stains in daily diet, as well as some minerals in drinking water and human saliva are adsorbed on these sticky substances, forming dental plaque and tartar, which gradually turns teeth yellow or black.
2. Endogenous coloring
Endogenous coloring is formed during tooth development. If tetracycline is deposited in dentin, it will turn teeth into yellow, brown or dark gray, which is called tetracycline teeth. If drinking water contains too much fluorine, it may also lead to dental fluorosis, white chalk and brown plaque on the tooth surface; If the tooth nerve is necrotic, the combination of hemoglobin and bacterial decomposition products will also make the tooth black.
3. Medicinal toothpaste
Although medicinal toothpaste can control the generation of pathogenic bacteria, it will also destroy the "ecological balance" in the oral cavity and cause new infections. More importantly, alkaloids in medicinal toothpaste will damage the enamel on the tooth surface and make the teeth lose luster.
People's Network-Why do teeth turn yellow? Five kinds of food make teeth yellow easily.