Burton's line
Burton's line, also known as the Burton line or Burtonian line, is a clinical sign found in patients with chronic lead poisoning. It is a very thin, black-blue line visible along the margin of the gums, at the base of the teeth.

The sign was described in 1840 by Henry Burton:

A similar line, the "bismuth line", occurs in people who have ingested bismuth compounds; bismuth, however, is of very low toxicity.
Q1441305
clinical sign
Concept
Q110315
lead poisoning
Concept
Q104280
gums
Concept
Q5718918
Henry Burton
PER
Q4918357
bismuth line
UNK
Q942
bismuth
Concept
Q5000947
Burton's line
Concept
1840-01-01T00:00:00Z^^http://www.w3.org/2001/XMLSchema#dateTime
1840
DATE
instance of
has cause
discoverer or inventor
symptoms and signs