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Periodontium Vocab
PCD Exam2
23
Dentistry
Graduate
09/17/2013

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Term
The supporting tissues including mineralized tissues and soft tissues
Definition
periodontium
Term
the portion of the maxilla and
mandible which surrounds
the tooth roots
Definition
Alveolar bone
Term
The outer layer of the root
Definition
cementum
Term
Another name for alveolar bone
Definition
alveolar process
Term
the
individual tooth
“socket” within
the bone
Definition
alveolus
Term
If 32 teeth are present, then 32 ______ are present
Definition
alveoli
Term
the thin layer of
compact bone which lines each alveolus
Definition
lamina dura
Term
What composes the soft tissue
Definition
Gingiva (“gums”)
and
Periodontal
ligament (PDL)
Term
gingiva firmly bound to the underlying
alveolar bone
Definition
attached gingiva
Term
gingiva NOT bound to underlying bone
and 2 things it includes
Definition
free gingiva
Marginal gingiva and the interdental papilla
Term
- fills the interdental space
- the part of the gingiva between two adjacent teeth
- somewhat triangular
Definition
Interdental papilla
Term
not always
visible; when visible, it delineates where the
attached gingiva and free gingiva meet
Definition
Free gingival groove
Term
a crevice or
potential space, “pocket”
Definition
Gingival sulcus
Term
the “edge” or
“outline” of the gingiva
Definition
gingival margin
Term
plural of interdental papilla
Definition
interdental papillae
Term
fibers that attach to the cementum
and to the lamina dura
Definition
periodontal ligament (PDL)
Term
How short are PDL fibers
Definition
about 0.2 mm
Term
What is the function of periodontal ligament
Definition
attachment and support;
allows some movement
(a little like a trampoline)
Term
What is the zone between gingival groove and gingival margin
Definition
free gingiva covering sulcus
Term
What fibers are tooth to tooth (cementum to cementum)
Definition
transeptal fibers
Term
How do proper contours help the gingiva?
Definition
direct the food away from the gingiva
Term
What does undercontoured and over contoured mean and what does it do to the gingiva
Definition
undercontoured=Flat=abrasion of gingiva by food/impaction of food “into” the gingiva
overcontoured=Bulky= lack of stimulation by food
Term
an immovable
articulation in which a hard part is
received into a bone cavity (as the
teeth into the jaws) It is the “joint”
of teeth in the alveolar bone
Definition
Gomphosis
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