Deck 10: Tooth Identification

Question 1

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 statement is false.
C) The first statement is false;the second statement is true.
D) Both statements are false.

Answer 1

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 2

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 statement is false.
C) The first statement is false;the second statement is true.
D) Both statements are false.

Answer 2

B
The crowns of maxillary incisors are wider in mesiodistal dimension than in faciolingual dimension.The second statement is false because the roots of maxillary incisors are triangular in cross section.The roots of the mandibular incisors,however,are oval in cross section.These facts apply to both central and lateral incisors.

Question 3

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.

Answer 3

A,D
Crowns of mandibular molars are wider mesiodistally than faciolingually.Note that the opposite is true of maxillary molars.Mandibular molars have two roots: one buccal and one lingual.The cusp of Carabelli is not located on a mandibular molar;it is found on the maxillary first molar.It is true that the occlusal groove on the second molar is well established.Running in a mesial to distal direction,this groove forms a cross (+)with facial and lingual grooves.Finally,a strong oblique ridge is present on the maxillary first molar,not the mandibular.

Question 4

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

Question 5

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 6

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 7

Which premolar most frequently has three cusps?

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

Question 8

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 9

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 10

The cusp of Carabelli is located on the

A) mandibular first molar
B) mandibular second molar
C) maxillary first molar
D) maxillary second molar

Question 11

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 12

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 13

Which molar has two buccal grooves?

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

Question 14

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 15

Which are the smallest teeth?

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

Question 16

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 statement is false.
C) The first statement is false;the second statement is true.
D) Both statements are false.

Question 17

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 statement is false.
C) The first statement is false;the second statement is true.
D) Both statements are false.

Question 18

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

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

Question 19

Which incisor exhibits a slight distolingual rotation?

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

Question 20

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 statement is false.
C) The first statement is false;the second statement is true.
D) Both statements are false.

Question 21

MATCHING
Identification of teeth involves mastery of tooth anatomy.Match the anatomical descriptions with the appropriate teeth.
a.Two roots,one mesial and one distal
b.Two facial roots and one lingual root
c.Lingual surface almost smooth
d.Incisal edge angled toward lingual
e.Prominent facial cusp with one or two smaller lingual cusps
f.Mesioincisal angle is relatively sharp
g.Single cusp tip directly over midcenter of root
h.Buccal and lingual cusps approximately equal in height
Mandibular incisors

Question 22

MATCHING
Identification of teeth involves mastery of tooth anatomy.Match the anatomical descriptions with the appropriate teeth.
a.Two roots,one mesial and one distal
b.Two facial roots and one lingual root
c.Lingual surface almost smooth
d.Incisal edge angled toward lingual
e.Prominent facial cusp with one or two smaller lingual cusps
f.Mesioincisal angle is relatively sharp
g.Single cusp tip directly over midcenter of root
h.Buccal and lingual cusps approximately equal in height
Maxillary incisors

Question 23

MATCHING
Identification of teeth involves mastery of tooth anatomy.Match the anatomical descriptions with the appropriate teeth.
a.Two roots,one mesial and one distal
b.Two facial roots and one lingual root
c.Lingual surface almost smooth
d.Incisal edge angled toward lingual
e.Prominent facial cusp with one or two smaller lingual cusps
f.Mesioincisal angle is relatively sharp
g.Single cusp tip directly over midcenter of root
h.Buccal and lingual cusps approximately equal in height
Maxillary premolars

Question 24

MATCHING
Identification of teeth involves mastery of tooth anatomy.Match the anatomical descriptions with the appropriate teeth.
a.Two roots,one mesial and one distal
b.Two facial roots and one lingual root
c.Lingual surface almost smooth
d.Incisal edge angled toward lingual
e.Prominent facial cusp with one or two smaller lingual cusps
f.Mesioincisal angle is relatively sharp
g.Single cusp tip directly over midcenter of root
h.Buccal and lingual cusps approximately equal in height
Mandibular canine

Question 25

Canines have a single cusp.

Question 26

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

Question 27

MATCHING
Identification of teeth involves mastery of tooth anatomy.Match the anatomical descriptions with the appropriate teeth.
a.Two roots,one mesial and one distal
b.Two facial roots and one lingual root
c.Lingual surface almost smooth
d.Incisal edge angled toward lingual
e.Prominent facial cusp with one or two smaller lingual cusps
f.Mesioincisal angle is relatively sharp
g.Single cusp tip directly over midcenter of root
h.Buccal and lingual cusps approximately equal in height
Mandibular premolars

Question 28

MATCHING
Identification of teeth involves mastery of tooth anatomy.Match the anatomical descriptions with the appropriate teeth.
a.Two roots,one mesial and one distal
b.Two facial roots and one lingual root
c.Lingual surface almost smooth
d.Incisal edge angled toward lingual
e.Prominent facial cusp with one or two smaller lingual cusps
f.Mesioincisal angle is relatively sharp
g.Single cusp tip directly over midcenter of root
h.Buccal and lingual cusps approximately equal in height
Maxillary canine

Question 29

MATCHING
Identification of teeth involves mastery of tooth anatomy.Match the anatomical descriptions with the appropriate teeth.
a.Two roots,one mesial and one distal
b.Two facial roots and one lingual root
c.Lingual surface almost smooth
d.Incisal edge angled toward lingual
e.Prominent facial cusp with one or two smaller lingual cusps
f.Mesioincisal angle is relatively sharp
g.Single cusp tip directly over midcenter of root
h.Buccal and lingual cusps approximately equal in height
Maxillary molars

Question 30

MATCHING
Identification of teeth involves mastery of tooth anatomy.Match the anatomical descriptions with the appropriate teeth.
a.Two roots,one mesial and one distal
b.Two facial roots and one lingual root
c.Lingual surface almost smooth
d.Incisal edge angled toward lingual
e.Prominent facial cusp with one or two smaller lingual cusps
f.Mesioincisal angle is relatively sharp
g.Single cusp tip directly over midcenter of root
h.Buccal and lingual cusps approximately equal in height
Mandibular molars