What Makes Teeth White?
By Ann Sielicki on January 15, 2014
Tooth enamel might seem white, but it's actually the layer underneath -- dentin -- that's makes the tooth appear lighter or darker. Enamel is semi-translucent. At least it starts that way.
Over time, coffee, tea, wine, cigarettes, and other substances can stain your enamel, making it dingy, yellow, or gray.
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