A narrow continuous line of brown dots which follow contour of gingival margin of posterior teeth in children is known as:
A black strain in the form of a fine line adjacent to the free gingival margin, which is not related to smoking, has been called metabolic strain and “mesenteric line.”
This stain may occur as a broad thin black line following the contour of the free gingival margin onto the interproximal surface of the teeth.
Burtonian line
Mesenteric line
Neonatal line
Developmental line