Third molar roots continue to calcify until about 25

Third molar roots continue to calcify until about 25 years of age.
ANS: T
Calcification of permanent teeth begins soon after birth and continues until about the 25th
year, when roots of the third molars become calcified. The last area of any tooth to become
calcified is the apex of the root.
REF: p. 44 OBJ: To understand how the growth centers or lobes fuse and form a tooth
NAT: CDA: GC I.A.7. Identify basic oral and dental anatomy, physiology and development,
including but not limited to: teeth. TOP: BLOOM: Remembering

Anatomy of Orofacial Structures 8th Edition Brand Test Bank
Chapter 06: Occlusion
Brand/Isselhard: Anatomy of Orofacial Structures, 8th Edition
MULTIPLE CHOICE
1.
Class II occlusion is called distoclusion because the distal surface of the mandibular canine is
distal to the mesial surface of the maxillary canine.
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.
ANS: A
Class II occlusion is called distoclusion. This question addresses the canine relationship;
however the dental classification, described by E. H. Angle, more frequently relies on the
relationship between maxillary and mandibular first molars. Note that for both Class II and
Class III occlusion, the discrepancy must be by at least the width of a premolar.
REF: p. 62 OBJ: To identify the three occlusal classifications
NAT: CDA: GC I.A.7. Identify basic oral and dental anatomy, physiology, and development,
including but not limited to: teeth. TOP: BLOOM: Understanding
2.
Classification of occlusion by the Angle system primarily relies on the relationship between
maxillary and mandibular canines because the anatomical features of molars are more difficult
to interpret.
N R I G B.C M
a. Both the statement and the
U
rea s
S
on
N
are
T
correct
O
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.
ANS: E
Classification of occlusion by Dr. Angle’s system, the mo st commonly utilized dental
classification system, primarily relies on molar relationship. The anatomical features of
molars provide optimal means of assessing occlusal patterns. The canine relationship is
utilized when one or more first molars are missing or there is another reason that makes
analysis of molar relationship not possible.
REF: p. 62 | p. 64 OBJ: To identify the three occlusal classifications
NAT: CDA: GC I.A.7. Identify basic oral and dental anatomy, physiology, and development,
including but not limited to: teeth. TOP: BLOOM: Understanding
3.