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why the teeth gets discoloured

Our teeth are attacked daily by pigments from food and drinks. The tooth's enamel is covered with a colourless surface of protein and like flycatcher tape, small particles will be stuck to the surface. As a result the tooth will be discoloured.

Some people have yellower dentine, which can be seen through the enamel. This makes the teeth yellower. The tooth's dentine will be whiter after a teeth bleaching.

Other reasons why teeth will be discoloured and stained are medical reasons like medicine, genetic odontology or normal ageing.

	Medicines like tetracycline (against acne) can make the teeth blue/grey and frequently worsen when the teeth are affected by the surrounding light.
	Too much intake of flour, can make the teeth discoloured.
	Diseases like jaundice. erythroblastosis fetalis and porphyria secretes of colour pigment that affects the teeth.
	Genetically, like amelogenesis and dentinogenesis imperfecta.
	A severe trauma could make the teeth stained. This is caused when the blood in the blood veins in the teeth oxidise and makes the teeth darker.
	The most common causes to discoloured and darker teeth are food, drinks like red wine, coffee, tee, cola and tobacco smoking and moist snuff.
	The teeth will also be darker with age. This because the dentine in the tooth gets darker with age.