Chapter 10: Tooth Identification

Tooth roots do not always curve. If roots do curve, they typically curve distally.

• Both statements are true.

• The first statement is true, the second is false.

• The first statement is false, the second is true.

• Both statements are false.

Third molars are generally larger than first molars because a general rule of tooth identification states that permanent molars are generally taller in height and have more cusps the more posteriorly they are placed.

• Both the statement and the reason are correct and related.

• Both the statement and the reason are correct but are NOT related.

• The statement is correct, but the reason is NOT correct.

• The statement is NOT correct, but the reason is correct.

• NEITHER the statement NOR the reason is correct.

Secondary anatomy refers to anatomical features of second molars and premolars. Tertiary anatomy refers to unique anatomical features of third molars.

• Both statements are true.

• The first statement is true, the second is false.

• The first statement is false, the second is true.

• Both statements are false.

The crowns of the maxillary incisors are wider mesiodistally than labiolingually. The roots of maxillary incisors are oval in cross section.

• Both statements are true.

• The first statement is true; the second is false.

• The first statement is false; the second is true.

• Both statements are false.

Which incisor exhibits a slight distolingual rotation?

• Maxillary central

• Maxillary lateral

• Mandibular central

• Mandibular lateral

The lingual cusp of the maxillary first premolar is longer than the facial cusp. This tooth often has two roots, one mesial and one distal.

• Both statements are true.

• The first statement is true; the second is false.

• The first statement is false; the second is true.

• Both statements are false.

Which premolar has a small lingual cusp and no central pit?

• Maxillary first

• Maxillary second

• Mandibular first

• Mandibular second

Maxillary molars have three roots, a facial and two lingual. Mandibular molars have two roots, a facial and a lingual.

• Both statements are true.

• The first statement is true; the second is false.

• The first statement is false; the second is true.

• Both statements are false.

Root bifurcations may be present on maxillary premolars but not on mandibular premolars because maxillary premolars have two roots whereas mandibular premolars have only one root.

• Both the statement and the reason are correct and related.

• Both the statement and the reason are correct but are NOT related.

• The statement is correct, but the reason is NOT correct.

• The statement is NOT correct, but the reason is correct.

• NEITHER the statement NOR the reason is correct.

Which molars have five (major and minor) cusps?

• Maxillary first and second

• Maxillary first and mandibular first

• Mandibular first and second

• Maxillary third and mandibular third