Each mamelon forms the incisal edge of one of the primary labial lobes of the incisors. With wear, the rounded incisal edge becomes flat and is then referred to the incisal ridge.
A) Both statements are true.
B) The first statement is true; the second is false.
C) The first statement is false; the second is true.
D) Both statements are false.

Question

Quizplus · Accepted Answer

The terms incisal edge and incisal ridge are reversed in the question. Each mamelon initially forms the incisal ridge of one of the three primary labial lobes. However, normal use eventually wears down the rounded ridge into a flat edge. At this point the term incisal edge is more appropriate than ridge.

Each Mamelon Forms the Incisal Edge of One of the Primary