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oral embryology > quiz on pulp and cementum > Flashcards

quiz on pulp and cementum Flashcards

1
Q

what are products of the dental papilla

A

pulp and dentin

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2
Q

a loose, noncalcified connective tissue

A

pulp

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3
Q

highly specialized, calcified connective tissue

A

dentin

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4
Q

vascular

A

pulp

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5
Q

avascular

A

dentin

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6
Q

both____ and ____ form the bulk of the tooth

A

pulp and dentin

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7
Q

where is pulp located

A

centrally located tissue in the tooth

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8
Q

coronal pulp is where

A

crown

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9
Q

radicular pulp is where

A

in root

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10
Q

fibers of pulp

A

many collagen fibers

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11
Q

what cells form and maintain collagen in pulp(pulp matrix and ground substance); largest group of cells in the pulp(in cell rich zone)

A

fibroblasts

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12
Q

help to eliminate dead cells in the pulp

A

macrophages

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13
Q

WBC; helps in defense in the pulp

A

lymphocytes

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14
Q

function as cell pool when a new odontoblast or fibroblast is needed in pulp

A

undifferentiated mesenchymal cells

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15
Q

are there adipose cells in the pulp?

A

no

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16
Q

form a layer lining the periphery; cell body live in the pulp; cell process extend in the dentin

A

odontoblasts

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17
Q

what is the 2nd largest group of cells in the pulp?

A

odontoblasts

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18
Q

outer periphery of the pulp(zone)

A

odontoblastic zone

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19
Q

zone underneath odontoblastic zone; contains a nerve and capillary plexus; fewer cells than odontoblastic zone

A

cell free zone of Weil

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20
Q

zone where cell density is very high; mainly fibroblasts

A

cell rich zone

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21
Q

centrally located where major vessels and nerves are located

A

pulp core

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22
Q

early pulp interacts and initiates tooth formation

A

inductive

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23
Q

rich blood supply that forms capillary plexus surrounding odontoblasts

A

nutritive

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24
Q

odontoblastic cells of pulp form dentin

A

formative

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25
Q

response to stimuli may trigger formation of reactive/reparative dentin

A

protective

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26
Q

pulp response to stimuli the brain receives as pain

A

sensory

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27
Q

in the pulp, blood vessels enter and exit by the _______

A

apical foramen

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28
Q

extensive vascular network formed in the cell free zone in pulp

A

capillary plexus

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29
Q

are pulp vessels innervated?

A

yes

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30
Q

what is a neurovascular bundle?

A

artery, vein, and a nerve

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31
Q

the nerve cell bodies from the dentinal tubules are located:

A

between odontoblastic cell bodies in pulp

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32
Q

two types of myelinated fibers in pulp

A

autonomic, afferent

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33
Q

regulate blood flow

A

autonomic

34
Q

mainly from 2nd and 3rd branches of the trigeminal

A

afferent

35
Q

pulp stones are also called ___

A

denticles

36
Q

form during root development; dentinal tubules present; odontoblast located periphery

A

true pulp stones

37
Q

form when components of pulp start to degenerate; dentinal tubules not present

A

false pulp stones

38
Q

may be loose in the pulp, attached to the dentin wall, or embedded in the dentin tissue

A

both true and false

39
Q

with age in the pulp, you have a decrease in::

A

intercellular substance, water, and cells

40
Q

with age you also have a lower rate of collagen degradation which causes

A

increased collagen fibers

41
Q

as the pulp ages, size does what

A

decreases because of continual deposition of dentin

42
Q

is pulp vital after a root canal?

A

no

43
Q

age within the pulp is reflected where

A

in dentin– there is a cont. deposition of peritubular dentin, scelorotic dentin, etc

44
Q

cementum is part of the ____

A

periodontium (tissues supporting and investing the tooth

45
Q

what does the peridontium consist of

A

cementum, PDL, alveolar bone, and gingiva facing the tooth

46
Q

what parts of the periodontium are derived from the dental follicle

A

cementum, pdl, alveolar bone

47
Q

is cementum a highly calcified CT?

A

yes

48
Q

cementum, alveolar bone, and PDL form attachment apparatus of

A

teeth, allowing teeth to be suspended in the jaw

49
Q

bone: avascular or vasucular

A

vascular

50
Q

cementum: vascular or avascular

A

avascular

51
Q

bone contains:

A

nerve, and nutrient canals

52
Q

cementum doesnt contain:

A

nerve and canals

53
Q

inorganic, organic and water composittion of cementum

A

inorganic: 65%
organic: 23%
water: 12%

54
Q

which cells are found in the cementum

A

cementoblasts and cytes

55
Q

make cementum

A

cementoblasts

56
Q

entrapped cementoblasts in cementum being produced

A

cementocytes

57
Q

ground substance of cementum

A

proteoglycans

58
Q

what shapes the root?

A

hertwig sheath begins to grow down after crown formation is complete

59
Q

(cementum) which root sheath induces the formation of root dentin

A

inner root sheath

60
Q

for cementum: the sheath breaks down to form the _____

A

epithelial rests of malassez

61
Q

what induces the differentiation of cementoblasts from the dental follicle to begin secretion of cementoid- which leads to the apposition of cementum over dentin(DCJ is formed)

A

cells of the dental follicle contacting new dentin

62
Q

very little cementum is deposited on the developing root until

A

tooth reaches functional occlusion

63
Q

how much of root has been formed when tooth erupts

A

2/3

64
Q

two groups of fibers found in cementum:

A

extrinsic collagen fibers and intrinsic collagen fibers

65
Q

aka sharpeys fibers; uncalcified fibers form pdl and are partially inserted into outer cementum at right angles(90); dental follicle produce these fibers

A

extrinsic collagen fibers

66
Q

non pdl fibers produced by cementoblasts and run parallel to DCJ

A

intrinsic collagen fibers

67
Q

acellular cementum is made:

A

made first; primary

68
Q

located near cervical half of tooth-closer to CEJ; no embedded cementocytes in lacunae; forms slower; not increase during life of tooth; greater calcified than cellular

A

acellular cementum

69
Q

contains cementocytes trapped in lacunae due to fast rate of production

A

cellular ; secondary; less calcified

70
Q

located near apical portion of tooth; depositied throughout life of tooth; depositied at intervals– producing arrest lines; highly calcified lines similar to those seen in bone–growth rings of a tree( incremental lines of cementum

A

cellular cementum

71
Q

occurs when resorption stops and cementum deposition begins; reflects remodeling or cementum; cen occur when associated with orthodontic movement or trauma to the teeth

A

reversal lines

72
Q

small, abnormal calcified bodies occasionally found in the pdl; result of apposition of cementum around cellular debris in the pdl; found attached to cementum, free pdl, or embedded in cementum of root

A

cementicles

73
Q

can present some clinical problems in differentiation from calculus

A

cementicles

74
Q

near CEJ; symmetrical spheres of cementum attached to cemental root surface(similar to enamel pearls)

A

cemental spurs

75
Q

local abnormal thickening of parts of the cememtum; apical region

A

hypercementosis

76
Q

hypercementosis can be seen in cases of:

A

chronic inflammation of the tooth; loss in an opposing tooth; tooth becomes fused to the surrounding alveolar bone proper

77
Q

there are how many types of CEJ relationships that can occur during the development of the tooth

A

3

78
Q

percentage of cementum meets the enamel edge to edge

A

52%

79
Q

percentage of cementum overlaps a small part of the enamel

A

15%

80
Q

percentage of cementum and enamel do not meet, exposing dentin; patient may experience dentinal hypersensitivity

A

33%

oral embryology (10 decks)

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