Colour of teeth
Since the enamel of permanent teeth is slightly transparent, the yellowish colour of the underlying dentine is shown through it. Therefore, permanent teeth will appear slightly yellowish. As we get older, the dentine increasingly grows thicker, and it is normal that our teeth become more yellowish.
Photograph of a set of yellowish permanent teeth.
Slightly yellowish permanent teeth

The enamel of deciduous teeth is not as transparent as our permanent teeth. That is why deciduous teeth look milky white.
Photograph of a set of milky white deciduous teeth.
Milky white deciduous teeth

Factors causing tooth discoloration

There are two factors causing tooth discoloration—internal factor and external factor.

External factors causing tooth discoloration

Internal factors causing tooth discoloration

Last revision date: 18 January 2012