intrinsic staining

in·trin·sic stain·ing

(in-trinzik stāning)
Discoloration of internal tooth structure due to factors derived from within the body; an effect of substances such as the antibiotic tetracycline. Such stains are not usually removable but may be treated through cosmetic dental procedures.
Medical Dictionary for the Dental Professions © Farlex 2012
References in periodicals archive ?
Other factors may be dental materials--some fillings, such as amalgam, can cause intrinsic staining of grey-black color--and aging.
The intra-oral examination when the child reported at 17 months showed green intrinsic staining of all the erupted primary teeth (chlorodontia).
Harder/deeper extrinsic discoloration and intrinsic staining require various bleaching techniques.
Conditions which cause intrinsic staining of teeth are:
Intrinsic staining is a bit more complicated, because the staining is on the inside of the tooth, or where the dentin is exposed, and does not usually go away.
To permanently remove intrinsic staining, a crown or veneers can be suggested by the dentist, as it provides a cosmetic option for the discoloration.
Other factors may be dental materials-some fillings, such as amalgam, can cause intrinsic staining of grey-black color--and aging.