The cause of tooth discoloration can often be determined based on the color, dental examination and clinical history.
Location of the discoloration in or on the teeth:
(1) extrinsic: with exterior of the tooth cleaned, the discoloration is reduced
(2) instrinsic: discoloration persists despite cleaning
Number of teeth involved:
(1) localized: one or a few teeth involved, with others unaffected
(2) generalized: all or most teeth affected
Instrinsic vs Extrinsic
poor oral hygiene
coffee or tea
drugs (iron, antibiotics, etc.)
betel nut chewing
brown, black, white
black, silver, gold
bilirubin (kernicterus, etc)
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