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Abnormal tooth colour
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.
The enamel of deciduous teeth is not as transparent as our permanent teeth. That is why deciduous teeth look milky white
Factors causing tooth discoloration
There are two factors causing tooth discoloration — internal factor and external factor.
External factors causing tooth discoloration
Drinking of dark-coloured beverages, such as tea, result in the food colours being adsorbed onto the tooth surfaces.
The dentist will use:
Avoid drinking dark-coloured beverages to minimize food colours being adsorbed.
Teeth has not been cleaned thoroughly, and the accumulated dental plaque contained bacteria or fungi that can produce colour and formed green and orange stains.
Dentist will perform scaling to remove accumulated dental plaque and stains.
Brush the teeth every morning and before bed at night, and use dental floss to remove dental plaque to keep the teeth white.
If there was certain sickness or, if tetracycline (a kind of antibiotics) is taken during the development of teeth, the teeth formed will be greyish-blue to brownish-yellow.
If teeth still appear greyish-black, dentist can treat the discoloured teeth by bleaching, laminate veneer or crown.