Your teeth can become discoloured by stains on the surface or by changes inside the tooth. There are three main types of tooth discoloration:
Extrinsic– This occurs when the outer layer of the tooth (the enamel) is stained. Tea, Coffee, wine, other drinks or foods can Stained Teeth. Smoking also causes extrinsic stains.
Intrinsic– This is when the inner structure of the tooth (the dentine) darkens or gets a yellow tint. You can get this type of discoloration due to:
Exposure to excessive fluoride during early childhood.
Use of Tetracycline antibiotics during the second half of pregnancy.
Use of tetracycline antibiotics under 8 years old of age.
Trauma that affected a tooth when you were a young child. A fall, for example, may damage the developing permanent tooth or internal bleeding discolors teeth
Born with a rare condition called amelogenesis or dentinogenesis imperfecta. This causes gray, amber or purple discolorations.
Age-related – This is a combination of extrinsic and intrinsic factors. Dentin naturally yellows over time. The enamel that covers the teeth gets thinner with age, which allows the dentin to show through.