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Flashcards in Cementum Deck (78)
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31

True or false. Intermediate cementum has harder consistency than dentin.

True

32

Thin clear zone between granular layer and primary cementum?

Hyaline layer of Hopewell-Smith

33

Type of cementum laid down during root formation?

Acellular cementum

34

Type of cementum laid down after eruption and throughout life?

Cellular cementum

35

Cementum becomes about 3 times thicker between __ and __ yrs of age.

11 and 76

36

Sharpey's fibers are formed by the?

Fibroblast of periodontal ligament

37

Describe the direction of sharpeys fibers.

Perpendicular to cementum

38

Affects the direction of the extrinsic fibers? (2)

  • Mesial migration
  • Tipping

39

Intrinsic fibers are formed by the?

Cementoblasts

40

Describe the direction of intrinsic fibers of cementum?

Parallel to cementum

41

Growth lines of cementum?

Incremental lines of Salter

42

Ground substance of cementum is composed of? (3)

  • Proteoglycans
  • Glycoproteins
  • Phosphoproteins

43

Cells lining the root surface?

Cementoblasts

44

Type of cementoblasts?(2)

  • Active cemetoblast
  • Resting cementoblasts

45

Cementoblasts that are trapped in the lacunae?

Cementocytes

46

Where do you expect the canaliculi positioned?

Towards the PDL for nutrients

47

Types of cementoenamel junction? (3)

  • Overlapping
  • Butt joint
  • Gapped

48

CEJ type which occurs 60% of the time?

Overlapping

49

Type of CEJ:

When cementum meets enamel forming a distinct CEJ?

Butt joint (30%)

50

Type of CEJ:

Where root dentin is exposed?

Gapped (10%)

51

Determines the size and shape of roots?

HERS

52

Induces root dentin formation?

HERS

53

Side note: presence of root dentin --> HERS break --> cells of dental follicle come in contact with dentin -->

Multipotential cells differentiate into cementoblasts :)

54

Uncalcified cementum?

Cementoid or precementum

55

What cells make the ground substance and intrinsic fibers of cementum?

Cementoblasts

56

True or false. Acellular cementum is laid down more slowly.

True

57

True or false. Root is easier to extract if cementum is fused.

True

58

Excessive amount of cementum?

Hypercementosis

59

Hypercementosis is caused by overproduction of what type of cementum?

Cellular cementum

60

Overgrowth of cementum found in functional teeth?

Cementum hypertrophy