Multiple choice

Lead poisoning is seen on gingiva as _______________.

  1. yellowish line

  2. bluish black line

  3. greenish line

  4. brownish line

Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

This black line is termed as halo saturninus or Burtonian  line. This is similar to bismuth line, but the difference is that the lead line is more diffuse.