What Makes Teeth White?

 

 

 

 

 

 

 

 

 

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.