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Oral Bio II > Periodontium > Flashcards

Periodontium Flashcards

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Biology 101 flashcards
1
Q

periodontium has three principle components

A
  1. alveolar process
  2. cementum
  3. periodontal ligament
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2
Q

perio develops during a series of complex interaction of

A

mesenchyme, HERS, and dentel follicle

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3
Q

gomphosis

A

fibrous peg-in-socket joint

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4
Q

origin of osteoblast

A

surrounding mesenchymal tissue

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5
Q

origin of cemtoblast: HERS/follicle cells

A

ectomesenchyme cells

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6
Q

origin of PDL fibroblast

A

follicle cells/ectomesenchymecells

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7
Q

origin of odontoblast:

A

formdentinpart of the cemento-dentaljunction, dental pailla

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8
Q

the perioduntium contains ___ types of mineralized tissues found in the oral cavity

A

3 of 4

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9
Q

alveolar process: formed by

A

intramembranous ossification

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10
Q

alveolar process: begins during

A

8th week of uterine life

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11
Q

alveolar bone proper is

A

compact bone, lines the socket

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12
Q

supporting alveolar bone is

A

compact and trabecular

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13
Q

cortical plates:

A

compact bone component, central

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14
Q

Spongiosa

A

trabecular bone componet

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15
Q

cribrum=

A

sieve, it has volksmann’s canals running through it

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16
Q

lamina dura is

A

radiographic term :area of PDL attachment

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17
Q

bundle bone

A

histological term: sharpey’s fibers (PDL) embedded in bone

18
Q

alveolar bone proper: inner

A

constantly being remolded, smooth in young/rougher with age

19
Q

cortical plate inner

A

lingual and palatal surface

20
Q

cortical plate outer

A

labial and buccal surface

21
Q

central spongiosa

A
  1. trabecular (spongy/cancellous) bone supporting alveolar bone proper and cortical plate
  2. Marrow- red (hemopoietic) in young, yellow with aged
22
Q

maxilla, spongiosa ___ prevalent than mandible

A

more

23
Q

often abesent/diminished in ____ region of bothjaws

A

anterior

24
Q

interradicular septum is

A

bony septum between roots of a single tooth

25
Q

interalveolar septum

A

bony septum between adjacent teeth

26
Q

function of alveolar bone

A
  1. protect/stucture of socket for tooth to rest in
  2. attachment of sharpy’s fibers of PDL(embedded in bone)
  3. support of tooth roots, especially facial/lingual
  4. distribution of loading from the tooth and PDL to surrounding bone
27
Q

PDL composed of

A

fibroblast, mesenchymal, epithelial cells and macrophages

28
Q

associated with PDL

A

osteo blats/clast and cementoblast

29
Q

PDL ranges between

A

.15 mm to .38, decreases with age

30
Q

PDL is primarily

A

collagen fibers( I, III, XII)

31
Q

individual fibers can or cannot be remodeled while the overall bundle isnot changed

A

can

32
Q

main elastic fiber of PDL is

A

oxytalan

33
Q

Alveolar crest group

A

attach just at the CEJ and run outward to attach into the alveoar socket rim

34
Q

Horizontal Group

A

run from cementum at right angle to the tooth into the alveolar socket

35
Q

oblique group

A

most numerous, run atoblique from cementum most of the way down the root

36
Q

apical group

A

from root apex to the underlying bone

37
Q

interradicular group

A

only on multi-root teeth, attach to the interradicular spetum

38
Q

dentogingival group

A

most numerous, runs from cervical cementum to lamina propria

39
Q

alveologingival group

A

run from alveolar crest (bone) to lamina propia of free/attach gingivae

40
Q

circular group

A

circular band around neck of the tooth, attaches to other fiber and free gingiva

41
Q

dentoperiosteal group

A

run apically from cementum to the periosteum of the outer cortical plate

42
Q

transeptal fibers

A

run from cementum justunder the junctional epithelium, over the alveolar crest and into the cementum of an adjacent tooth. sig cause of orthodontic relapse

Oral Bio II (10 decks)

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