Discolorations in teeth due to various reasons

Pulpal tissue may become necrotized because of various mechanical trauma, chemical irritations, and bacterial attacks. Necrotic tissue residues arising from this necrotic process, diffuse into and around the dentinal tubules and lead to tooth discoloration. Teeth with this type of discoloration can be whitened by applying bleaching agents to the pulpal chamber following root canal therapy.

Post-traumatic Discolorations

Such discolorations occur due to rupture of capillaries located in the crown of the tooth because of a severe trauma which leads to inflow of Fe-sulfide containing blood cells into the dentinal tubules. In cases where tooth is still not dead, although rare, it may self-resolve. However, if necrosis is already present, discoloration does not resolve. In necrotized cases, following canal therapy, tooth is whitened by applying tooth bleaching agents into the pulpal chamber.


Caries forming on the teeth cause various discolorations as well. These discolorations usually present with grey, brown colors and rarely with white and opaque spots. Treatment is carried out by cleaning of caries and restoration of tooth with tooth colored filling materials. 

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