Table 1: Discoloration classification.

ESOGENOUS DYSCHROMIA ENDOGENOUS DYSCHROMIA
PRE-ERUPTIVE POST-ERUPTIVE
Chromophorous bacteria (actinomicetes) Imperfect dentinogenesis Decalcification
Food and beverages (tea, coffee, wine, coca-cola e liquorice) Imperfect amelogenesis Carious lesion
Mouthwash (Clorexidine) Dentinal dysplasia Enamel erosion
Drugs Hyperbilirubinemia Restoration matherials
Stannous florure Phenylchetonuria Dental traumas
Plaque, tartarum Haematic diseases Endodontic treatment
Smoke Endocrine diseases
Heavy metal salt Dental fluorosis
Tetracycline dischromia

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