BOTB primaries

Question 1

Which primary teeth have crowns that are wider mesiodistally than they are long inciso- or occluso-cervically?

a. Maxillary central incisor
b. Maxillary first molar
c. Mandibular lateral incisor
d. Mandibular first molar
e. Mandibular canine

Answer 1

a. Maxillary central incisor
b. Maxillary first molar
d. Mandibular first molar

Question 2

Which one tooth is adjacent and distal to the primary maxillary second molar in a 7-year-old?

a. Maxillary first premolar
b. Maxillary second premolar
c. Secondary maxillary first molar
d. Secondary maxillary second molar
e. Primary maxillary first molar

Answer 2

c. Secondary maxillary first molar

Question 3

How many teeth should be visible in the mouth of a 3-year-old?

a. None
b. 10
c. 20
d. 24
e. 28

Answer 3

20

Question 4

How many teeth should be present in the mouth of a 13-year-old?

a. 10
b. 20
c. 24
d. 28
e. 32

Answer 4

28

Question 5

Which primary molar most resembles a secondary maxillary right first molar?

a. Tooth A
b. Tooth E
c. Tooth F
d. Tooth T
e. Tooth B

Answer 5

a. Tooth A

Question 6

What would you estimate to be the dental age
of a child with the following teeth: all primary maxillary incisors, canines, and molars; secondary mandibular incisors and first molars.

a. 2 to 4 years
b. 5 to 7 years
c. 8 to 9 years
d. 10 to 11 years
e. Over 12 years

Answer 6

b. 5 to 7 years

Question 7

Which teeth (primary or secondary) have the mesial proximal contact positioned more cervically than the distal proximal contact?

a. Mandibular first premolar
b. Maxillary first premolar
c. Primary maxillary canine
d. Primary mandibular canine
e. Mandibular second premolar

Answer 7

a. Mandibular first premolar

c. Primary maxillary canine

Question 8

Which teeth (secondary or primary) have the mesial cusp ridge of the facial cusp longer than the distal cusp ridge of the facial cusp?

a. Mandibular first premolar
b. Maxillary first premolar
c. Primary maxillary canine
d. Primary mandibular canine
e. Mandibular second premolar

Answer 8

b. Maxillary first premolar

c. Primary maxillary canine

Question 9

Which succedaneous tooth erupts beneath tooth J?

a. No. 1
b. No. 5
c. No. 10
d. No. 13
e. No. 16

Answer 9

13

Question 10

Which of the following traits can be used to differentiate primary teeth from secondary teeth?

a. Primary teeth have greater facial cervical bulges.
b. Primary teeth have relatively thinner and longer roots.
c. Primary teeth are whiter.
d. Primary anterior teeth are larger than their
successors.
e. Primary teeth have relatively larger pulps.

Answer 10

all but D

Question 11

Which of the following secondary teeth would you expect to be erupted in the average 9- to 10-year-old?

a. Maxillary lateral incisor
b. Maxillary central incisor
c. Mandibular canine
d. Maxillary canine
e. Mandibular second molar

Answer 11

a. Maxillary lateral incisor
b. Maxillary central incisor
c. Mandibular canine

Question 12

Which traits apply to a primary mandibular first molar?

a. Its roots are resorbed by the eruption of the 6-year mandibular first molar.
b. It resembles a mandibular 6-year first molar.
c. It has a prominent buccal cervical bulge.
d. It has a prominent mesial marginal ridge.
e. It has a prominent transverse ridge.
f. It has an occlusal table larger in the mesial half than in the distal half.

Answer 12

c. It has a prominent buccal cervical bulge.
d. It has a prominent mesial marginal ridge.
e. It has a prominent transverse ridge.