Module 4 Flashcards

(43 cards)

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?

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?

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
What kind of contours can bone have?
horizontal and angular
26
is there a diference between angular contour and vertical bone loss?
yes
27
What is fenestration?
isolated areas where root is viewed through a window of bone
28
In fenestration what is the root surface covered by?
it is covered by periosteum and overlying gingiva and the marginal bone intact
29
What is dehiscence?
denuded areas extend through the marginal bone
30
What is the significance of fenestrations and dehiscence?
- perio differs - perio therapy may be needed for these areas - think about as you probe and find deep pockets
31
What are the cells responsible for remodeling of bone?
osteoblasts, osteoclasts
32
osteoblasts
bone formation
33
osteoclasts
bone resorption
34
What is the major nerve supply to the periodontium?
Trigeminal nerve
35
What branches of the trigeminal nerve to go to the maxilla and mandible
Maxilla- 2nd branch | Mandible- 3rd branch
36
What does the trigeminal nerve function to detect?
pain, touch and pressure
37
where are the nerve receptors located?
gingiva, alveolar bone and PDL
38
What is the maxillary gingiva innervated by?
PSA, MSA, ASA, infraorbital, GP, NP
39
What is the mandibular gingiva innervated by?
mental, buccal, and sublingual brand of the lingual nerve
40
What are the teeth and PDL innervated by?
Max: PSA, MSA, ASA Mand: inferior alveolar nerves
41
Where is the blood supply derived from for the periodontium?
inferior and superior alveolar arteries and their branches to the mandible, and maxilla
42
What are the 3 major sources of blood supply to the periodontium?
- apical vessels - penetrating vessels from the alveolar bone and PDL - anastomosing vessels for the gingiva
43
What does venous drainage accompany?
arterial supply