In the illustration below, structure "c" is the
A) Distal marginal ridge
B) Mesial marginal ridge
C) Lingual fossa
D) Lingual groove

Question

In the illustration below, structure "c" is the 
A) Distal marginal ridge 
B) Mesial marginal ridge 
C) Lingual fossa 
D) Lingual groove

Quizplus · Accepted Answer

Structure "c" in the illustration is the lingual groove, which is a developmental line that separates the fourth (labial) lobe from the three labial lobes of anterior tooth. Structures "a," "b," and "d," respectively, are the lingual fossa; the mesial marginal ridge; and the distal marginal ridge.

In the Illustration Below, Structure "C" Is the