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stain
(redirected from intrinsic stain)

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stain

Coloured compound that will bind to other substances. Stains are used extensively in microbiology to colour micro-organisms, in histochemistry to detect the presence and whereabouts in plant and animal tissue of substances such as fats, cellulose, and proteins, and in biochemistry to reveal the location of biomolecules, as in gel electrophoresis.
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Extrinsic stains are on the outer surface of the tooth, whereas intrinsic stains are actually inside the tooth and they show through the surface of the tooth enamel.
Ask the Warrior Dentist Cosmetic Dentistry Why Tooth Whitening ... by Meridith Berk / Food/cooking/nutrition community
Both extrinsic stains (those that appear on the surface of the teeth) and intrinsic stains that form on the teeth''s interior can be good candidates for the right teeth whitening system.
Get a Brighter Smile with Teeth Whitening by Matty Mathias / Business community
Bleaching products contain peroxide which not only removes surface or extrinsic discoloration but also the acts to penetrate the deep or intrinsic stains.
The Safety and Effectiveness of Whitening Products by John Grant / Women's issues/gender studies community
 
 
 
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