800 Questions Anatomic Sciences_pag206

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Questions: 20-40 191
31. The mandibular condyle and its associated
disc slide against which surface in normal
mandibular opening?
A. Posterior one-fourth of mandibular fossa
B. Anterior portion of articular eminence
C. Posterior portion of articular eminence 
D. Articular (glenoid) fossa
32. The crown of the primary maxillary central
incisor
A. has a longer length incisocervically and is
smaller mesiodistally than the permanent
maxillary central incisor. 
B. has a longer length incisocervically and is
larger mesiodistally than the permanent
maxillary central incisor. 
C. has a shorter length incisocervically and
is smaller mesiodistally than the perma-
nent maxillary central incisor. 
D. has a shorter length incisocervically and
is larger mesiodistally than the perma-
nent maxillary central incisor. 
33. In a maxillary 1st molar, a depression associ-
ated with a furcation might be detectable on
all of the following surfaces EXCEPT
A. buccal.
B. palatal.
C. mesial.
D. distal.
34. Which of these surfaces is a proximal surface? 
A. Facial
B. Lingual
C. Incisal
D. Buccal
E. Mesial 
35. In an ideal occlusion, the mesiobuccal cusp
of the permanent maxillary 2nd molar
opposes which of the following?
A. The buccal groove of the mandibular
2nd molar
B. The distobuccal groove of the mandibu-
lar 1st molar
C. The mesiobuccal groove of the mandibu-
lar 2nd molar
D. The buccal embrasure between the
mandibular 1st and 2nd molars
36. Which one of the following normally single-
rooted teeth is most likely to have a bifur-
cated root?
A. Maxillary central incisor
B. Maxillary lateral incisor
C. Maxillary canine
D. Mandibular canine
E. Maxillary 1st premolar
37. Which tooth is likely to have root depressions
on both the mesial and distal root surfaces?
A. Maxillary central incisor
B. Maxillary lateral incisor
C. Maxillary 2nd premolar
D. Mandibular 2nd premolar
38. The mandible functions as what type of lever?
A. Class I
B. Class II
C. Class III
D. Class IV
39. At what age is a child expected to have 12 pri-
mary teeth and 12 permanent teeth?
A. 61/2 years
B. 71/2 years
C. 81/2 years
D. 101/2 years
E. 121/2 years
40. All of the following are true of the functional
outer aspect (FOA) in ideal occlusions
EXCEPT
A. it is located on the outer aspect of 
supporting cusps.
B. it may contact the inner incline of 
supporting cusps.
C. in the mandibular arch, it is a continuous
ribbon which runs from the buccal of one
3rd molar to the other, covering the
incisal edges of the lower anterior teeth.
D. it does not exist on maxillary anterior teeth.
E. it is no more than 1 mm wide.
Dental Anatomy
and Occlusion 
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