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microanatomy > Alveolar Bone (UNIT 4) > Flashcards

Alveolar Bone (UNIT 4) Flashcards

1
Q

What does the alveolar bone contain?

A

teeth sockets

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2
Q

What does the alveolar bone develop from?

A

Dental sac

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2
Q

What is the alveolar bone continuous with?

A

basal bone

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3
Q

What does the alveolar bone work in conjunction with to anchor the teeth in the jaw?

A

Cementum and the Periodontal Ligament

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3
Q

What is the function of the alveolar bone?

A

anchor the teeth in the jaw

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4
Q

What are the alveolar bone types?

A

Alveolar Bone Proper
Supporting Alveolar Bone

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5
Q

What type of bone does the alveolar bone proper have?

A

It’s always compact bone

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6
Q

What type of bone does the supporting alveolar bone have?

A

Either spongy bone or compact bone

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7
Q

What are the supporting alveolar bone at the lingual and buccal surfaces?

A

Cortical Plates

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8
Q

What type of bone do the Cortical Plates have?

A

Compact Bone

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9
Q

What is the cribriform plate?

A

Its pierced with small holes, openings for blood vessels and nerves

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10
Q

Does the alveolar bone proper have holes like the cribriform plate?

A

Yes, permit passage of bvs from PDL

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11
Q

What is Bundle bone?

A

attachment for PDL bundle fibers

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12
Q

What is spongy bone also called?

A

Cancellous bone
Trabecular bone

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13
Q

T or F: Only supporting alveolar bone is spongy

A

True

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14
Q

What are osteoclasts?

A

resorb bone

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15
Q

What are osteoblasts?

A

deposit bone (osteoid)

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16
Q

What are Osteocytes?

A

trapped inside bone tissue

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17
Q

What do Osteocytes have?

A

lacunae and canaliculi

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18
Q

What does the the alveolar bone proper merge with?

A

cortical plates at the alveolar crest

19
Q

What is the alveolar bone proper continuous with?

A

cortical plate bone

20
Q

What happens if the spongy bone is lacking?

A

Alveolar bone proper and cortical plate fuse

21
Q

What is going on if a tooth is leaning to one side?

A

There is pressure on the bone in the direction of the lean.

22
Q

What is the Interdental Speta area?

A

Between two different teeth

23
Q

What is the Interradicular Speta area?

A

between roots of the same tooth

24
Q

How is spongy (cancelous) bone arranged?

A

Is arranged in trabeculae (ladder-like or haphazard)

25
Q

What does spongy (cancelous) bone contain?

A

nutrient canals

26
Q

Spongy (cancelous) bone may not be present in what?

A

Interdental septa when teeth are too close together

27
Q

What does stress and tooth movement leads to?

A

Alveolar bone remodeling

28
Q

Alveolar bone may be remodeled under the pressure of stress from what?

A
  • Mesial drift
  • Orthodontia
29
Q

What is mesial drift?

A

The gradual movement of teeth in a horizontal direction towards the front of the oral cavity

30
Q

Mesial drift may be the result of ?

A
  • inclination of teeth, actions of jaw muscles, in particular the buccinator
  • deposition of the bone on the distal surface first pushes the teeth mesially
  • contraction of the gingival transseptal fibers.
31
Q

What does the mesial drift provide space for?

A

3rd molars

32
Q

Pressure causes bone?

A

resorption

33
Q

Tension causes bone?

A

deposition

34
Q

Force on tooth results in both?

A

tension and pressure

35
Q

What is the septum?

A

alv. bone proper + cancellous + alv. bone proper

36
Q

What happens as as adjacent teeth shift?

A

There will be both bone loss and formation occurring in the interdental and interradicular septa.

37
Q

There is a reconstructive shift of the _____ that maintains same width.

A

septum

38
Q

What does tension on the trailing(distal) side of a tooth cause?

A

Tension stimulates new bone formation in the adjacent alveolar bone proper.

39
Q

What are resting lines?

A

Smooth lines due to even osteoblast activity at linear edge of bone.

40
Q

What do resting line indicate?

A

Bone formation as a result of tension on the trailing side of the tooth

41
Q

What does pressure on the leading side of a tooth cause?

A

Causes bone to be removed from the adjacent alveolar bone proper to make space as the tooth moves.

42
Q

What are reversal lines?

A

Ruffled lines due to uneven edge left by osteoclastic activity.

43
Q

What do reversal lines indicate?

A

Bone removal as a result of pressure on the bone and marking sites of bone remodeling.

44
Q

Periodontal disease can result in?

A

resorption of alveolar bone

45
Q

Loss of teeth can also result in?

A

atrophy/loss of alveolar bone

46
Q

When alveolar bone is lost that includes all types of alveolar bone:

A
  • alveolar bone proper
  • spongy supporting alveolar bone
  • cortical plate alveolar bone
  • alveolar crest bone
  • interdental septa
  • interradicular septa.

microanatomy (9 decks)

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