All incisors have two marginal ridges,a cingulum,and a lingual fossa.The mandibular central incisor has the least distinct lingual anatomy.
A) Both statements are true.
B) The first statement is true;the second statement is false.
C) The first statement is false;the second statement is true.
D) Both statements are false.

Question

Quizplus · Accepted Answer

Marginal ridges,a cingulum,and a lingual fossa are standard anatomic features of incisors.The cingulum is a smooth convexity on the lingual surface immediately below the cervical line.The lingual fossa is mesially and distally confluent with the cingulum.Marginal ridges are rounded convexities that border the lingual fossa.Of the four incisors,the mandibular central has the least distinct anatomy as evidenced by a shallow surface with no prominent features.

All Incisors Have Two Marginal Ridges,a Cingulum,and a Lingual Fossa