1.
a function of the PDL is to help the tooth to withstand natural substantial forces. what is the name of the type of forces that occur during chewing?
A
occlusal trauma
B
compressive
C
frictional
2.
the PDL also serves as a source of sensory innervation, what is the name of the sensory innervation detected by the brain?
A
proprioception
B
percussion
C
parafunctional
3.
what part of the tooth germ does the PDL develop from?
A
dental papilla
B
dental sac
C
enamel organ
4.
what is the most common cell found in the PDL?
A
ameloblast
B
fibroblast
C
osteoblasts
5.
what is the principal fiber group of the PDL? this fiber group consists of five fiber subgroups
A
circular ligament
B
alveolodental ligament
C
lamina propria
6.
what is the name of the fiber subgroup that is attached to the cementum just below the CEJ? this subgroup functions to resist tilting, intrusive, extrusive, and rotational forces
A
alveolar crest group
B
dentoperiosteal ligament
C
dentogingival ligament
7.
what is the name of the fiber subgroup that is the most numerous of the subgroups? it covers the apical 2/3 of the root and originates in the alveolar bone proper and extends apically
A
alveolar crest group
B
circular ligament
C
oblique group
8.
what is the name of the subgroup that has no bony attachment? this subgroup is only on multirooted teeth
A
horizontal group
B
interradicular group
C
apical group
9.
the PDL is also made up of gingival fiber groups, what is the name of the subgroup that helps attach the gingiva to the alveolar bone proper because of its one mineralized attachment to bone?
A
circular ligament
B
alveologingival ligmaent
C
alveolar crest group
10.
of the gingival fiber groups, which is the most numerous?
A
dentoperiosteal
B
circular
C
dentogingival
11.
a clinical consideration of the PDL that causes the widening of the PDL and can often lead to an increase in mobility of the tooth is called what?
A
periodontitis
B
percussion
C
occlusal trauma
12.
which of the principal fiber subgroups remains the longest in the presence of active periodontal disease, despite the previous destruction of the entire alveolodental ligament?
A
interdental ligament
B
alveolar crest group
C
circular ligament
13.
what are the ends of the principal fibers that are within either cementum or alveolar bone proper called?
A
collagen fibers
B
periodontal fibers
C
sharpey fibers
14.
in addition to the periodontal ligament, what else makes up the periodontium?
A
pulp and dentin
B
enamel and dentin
C
alveolar bone and cementum
15.
what is the term we use when the PDL undergoes drastic changes with chronic periodontal disease that involves the deeper structures of the periodontium?
