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Tobacco: Tar in smoke from tobacco products (and also smokeless tobacco products) tends to form a yellow-brown-black stain around the necks of the teeth above the gumline. [12] Betel chewing. [13] Certain foods and drinks. Foods, such as vegetables, that are rich with carotenoids or xanthonoids can stain teeth.
Teeth blackening. Nishiki-e by Utagawa Kunisada, 1820, from the series Mirrors of the modern boudoir.. Ohaguro (Japanese: お歯黒, pronounced, lit. ' black teeth ') is the name given in Japan to the custom of blackening one's teeth with a solution of iron filings and vinegar.
Teeth blackening or teeth lacquering is a custom of dyeing one's teeth black. It was most predominantly practiced in Southeast Asian and Oceanic cultures, particularly among Austronesian , Austroasiatic , and Kra–Dai-speaking peoples .
Stele, with Decree of Nectanebo I. [1] ( Lunette of the top 1/3 of stele.) Frosting is a decorative effect named after its resemblance to the appearance of frost.It involves making very small marks in a surface so that it appears matt rather than polished, and in glass opaque rather than optically transparent.
The tablets, sold over the counter in many countries, contain a dye (typically a vegetable dye, such as Phloxine B) that stains the plaque a bright color (typically red or blue). After brushing, one chews a tablet and rinses. Colored stains on the teeth indicate areas where plaque remains after brushing, providing feedback to improve brushing ...
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The agents most commonly used to intrinsically change the color of teeth are hydrogen peroxide and carbamide peroxide. Oxygen radicals from the peroxide in the whitening agents contact the stains in the interprismatic spaces within the enamel layer. When this occurs, stains will be bleached and the teeth now appear lighter in color.