bismuth line

bismuth line
a thin blue-black line in the marginal gingiva around the teeth, sometimes confined to the gingival papilla, observed in bismuth poisoning. See also bismuth stomatitis, under stomatitis.

Medical dictionary. 2011.

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  • lead line — a gray or bluish black line at the gingival margin in lead poisoning, seen especially in patients with poor oral hygiene; it is similar to the bismuth line, but is somewhat more diffuse. Called also blue l. and Burton l. or sign …   Medical dictionary

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