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Perio > Module 4 > Flashcards

Module 4 Flashcards

1
Q

What is the alveolar bone also known as?

A

the cribiform plate

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2
Q

What is the thin layer of bone lining the tooth socket

A

alveolar bone

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3
Q

What is the alveolar bone radiographically

A

lamina dura

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4
Q

Alveolar bone only exists in the presence of ______

A

teeth

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5
Q

when there is tooth loss there is atrophy of_______

A

alveolar bone

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6
Q

What allows blood vessels and nerve fibers in an out of the PDL

A

perforations in the bone

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7
Q

What are the perforations in the bone that allow blood vessels and nerves to the PDL called?

A

Volkmann canals

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8
Q

What is another name for medullary bone?

A

canellous bone

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9
Q

where does the cancellous and trabecular bone lie?

A

between the alveolar bone proper and the outer buccal or lingual cortical bone

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10
Q

What supports the alveolar bone proper?

A

cancellous bone

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11
Q

What is another name for compact bone?

A

cortical plate

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12
Q

What forms the outer surface of the bone (external facial and internal lingual plates of bone)?

A

compact bone/cortical plate

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13
Q

The B/L plate become continuous with the alveolar bone proper to form what?

A

the alveolar crest

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14
Q

Where is the buccal cortial bone thin?

A

incisor, canine, and premolar areas

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15
Q

What are 2 common defects of the compact bone?

A

fenestration and dehiscence

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16
Q

Where is the compact bone generally thicker?

A

In the mandible

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17
Q

What is the periosteum

A

thin layer of connective tissue covering the outer surface of bone

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18
Q

What is the interdental septum?

A

cancellous bone bordered by socket wall of adjacent teeth (F & L plates)

19
Q

Is there always cancellous bone in the interdental septum?

A

No sometimes it is very thin or not present

20
Q

Crestal contour is an indicator of what?

A

peridontal health

21
Q

What do you evaluate the crest of bone in relation to on radiographs?

A

the CEJ

22
Q

In young individuals how far apical is the alveolar crest from the CEJ?

A

.75 to 1.5 mm

23
Q

In adults how apical is the alveolar crest from the CEJ?

A

1.5 to 2 mm

24
Q

Why is the alveolar crest 1.5 to 2 mm from the CEJ?

A

gingival fibers and JE take approx 2 m of room and lies above the alveolar crest

25
Q

What kind of contours can bone have?

A

horizontal and angular

26
Q

is there a diference between angular contour and vertical bone loss?

A

yes

27
Q

What is fenestration?

A

isolated areas where root is viewed through a window of bone

28
Q

In fenestration what is the root surface covered by?

A

it is covered by periosteum and overlying gingiva and the marginal bone intact

29
Q

What is dehiscence?

A

denuded areas extend through the marginal bone

30
Q

What is the significance of fenestrations and dehiscence?

A
  • perio differs
  • perio therapy may be needed for these areas
  • think about as you probe and find deep pockets
31
Q

What are the cells responsible for remodeling of bone?

A

osteoblasts, osteoclasts

32
Q

osteoblasts

A

bone formation

33
Q

osteoclasts

A

bone resorption

34
Q

What is the major nerve supply to the periodontium?

A

Trigeminal nerve

35
Q

What branches of the trigeminal nerve to go to the maxilla and mandible

A

Maxilla- 2nd branch

Mandible- 3rd branch

36
Q

What does the trigeminal nerve function to detect?

A

pain, touch and pressure

37
Q

where are the nerve receptors located?

A

gingiva, alveolar bone and PDL

38
Q

What is the maxillary gingiva innervated by?

A

PSA, MSA, ASA, infraorbital, GP, NP

39
Q

What is the mandibular gingiva innervated by?

A

mental, buccal, and sublingual brand of the lingual nerve

40
Q

What are the teeth and PDL innervated by?

A

Max: PSA, MSA, ASA
Mand: inferior alveolar nerves

41
Q

Where is the blood supply derived from for the periodontium?

A

inferior and superior alveolar arteries and their branches to the mandible, and maxilla

42
Q

What are the 3 major sources of blood supply to the periodontium?

A
  • apical vessels
  • penetrating vessels from the alveolar bone and PDL
  • anastomosing vessels for the gingiva
43
Q

What does venous drainage accompany?

A

arterial supply

Perio (11 decks)

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