Deck 10: Tooth Identification

Question 1

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

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.

Answer 1

C
Secondary anatomy refers to extra grooves and pits in addition, or secondarily, to the main primary developmental anatomy in any tooth. Tertiary anatomy refers specifically to the extremely shallow and more numerous grooves, pits, and lines present in third molars. Tertiary features give third molars a more wrinkled appearance than first or second molars.

Question 2

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.

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.

Answer 2

D
The lingual cusp of the maxillary first premolar is shorter than the facial cusp. While it is True that this tooth often has two roots, they are the buccal and lingual roots. For comparison, mandibular molars have a mesial and distal root.

Question 3

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

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.

Answer 3

D
While it is True that maxillary molars have three roots, there are two facial roots and one lingual root. Mandibular molars have two roots, one buccal and one lingual.

Question 4

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

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 5

Which molars have five (major and minor) cusps?

A) Maxillary first and second
B) Maxillary first and mandibular first
C) Mandibular first and second
D) Maxillary third and mandibular third

Question 6

Which incisor exhibits a slight distolingual rotation?

A) Maxillary central
B) Maxillary lateral
C) Mandibular central
D) Mandibular lateral

Question 7

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

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 8

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

A) Maxillary first
B) Maxillary second
C) Mandibular first
D) Mandibular second

Question 9

Which of the following accurately describe mandibular molars (select all that apply)?

A) Crowns are wider mesiodistally than faciolingually.
B) Three roots are present: two facial and one lingual.
C) The mandibular second molar has a cusp of Carabelli.
D) The occlusal groove on the second molar is well established.
E) A strong oblique ridge is present on the first molar.

Question 10

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.

A) Both the statement and the reason are correct and related.
B) Both the statement and the reason are correct but are NOT related.
C) The statement is correct, but the reason is NOT correct.
D) The statement is NOT correct, but the reason is correct.
E) NEITHER the statement NOR the reason is correct.

Question 11

The mandibular second molar has

A) Four almost equal cusps
B) One small distal cusp, two buccal cusps, and two lingual cusps
C) Three buccal cusps and two lingual cusps
D) Three major cusps and one minor cusp

Question 12

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.

A) Both the statement and the reason are correct and related.
B) Both the statement and the reason are correct but are NOT related.
C) The statement is correct, but the reason is NOT correct.
D) The statement is NOT correct, but the reason is correct.
E) NEITHER the statement NOR the reason is correct.

Question 13

Which has an oblique ridge (select all that apply)?

A) Maxillary first premolars
B) Maxillary second premolars
C) Maxillary first molars
D) Maxillary second molars
E) Maxillary third molars

Question 14

Roots of third molars are most often dilacerated because the more posterior the molars are positioned, the more variation of anatomy is evident.

A) Both the statement and the reason are correct and related.
B) Both the statement and the reason are correct but are NOT related.
C) The statement is correct, but the reason is NOT correct.
D) The statement is NOT correct, but the reason is correct.
E) NEITHER the statement NOR the reason is correct.

Question 15

Crowns of which teeth are wider faciolingually than mesiodistally (select all that apply)?

A) Maxillary premolars
B) Mandibular premolars
C) Maxillary molars
D) Mandibular molars

Question 16

Which are the smallest teeth?

A) Maxillary lateral incisors
B) Maxillary third molars
C) Mandibular central incisors
D) Mandibular lateral incisors

Question 17

Which premolar most frequently has three cusps?

A) Maxillary first
B) Maxillary second
C) Mandibular first
D) Mandibular second

Question 18

Which molar has two buccal grooves?

A) Maxillary first
B) Maxillary second
C) Mandibular first
D) Mandibular second

Question 19

On anterior teeth, the curvature of the CEJ is the same on mesial and distal surfaces.

Question 20

The cusp of Carabelli is located on the _____ molar.

A) Mandibular first
B) Mandibular second
C) Maxillary first
D) Maxillary second

Question 21

Canines have a single cusp.

Question 22

The distal incisal edges of anterior teeth are more rounded than the mesial incisal edges.