Internal tooth stains can be present since birth or result from age, medication, overexposure to fluoride, dental fillings, tooth trauma or root-canal therapy.
This kind of discoloration does respond well to treatments used on surface stains. Since these stains are within the teeth themselves, they can only be fully addressed through procedures that mask discoloration, like bonding, crowns and veneers.
In some instances, specifically those related to staining from tetracycline, professional whitening treatments repeated over time may be of some benefit in the long run. However, in-office or at-home bleaching may not entirely remove stains rooted deep within the teeth.
Concealing internal stains is the only guaranteed, permanent solution.
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