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oral embryology > quiz on pulp and cementum > Flashcards

quiz on pulp and cementum Flashcards

(80 cards)

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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
response to stimuli may trigger formation of reactive/reparative dentin
protective
26
pulp response to stimuli the brain receives as pain
sensory
27
in the pulp, blood vessels enter and exit by the _______
apical foramen
28
extensive vascular network formed in the cell free zone in pulp
capillary plexus
29
are pulp vessels innervated?
yes
30
what is a neurovascular bundle?
artery, vein, and a nerve
31
the nerve cell bodies from the dentinal tubules are located:
between odontoblastic cell bodies in pulp
32
two types of myelinated fibers in pulp
autonomic, afferent
33
regulate blood flow
autonomic
34
mainly from 2nd and 3rd branches of the trigeminal
afferent
35
pulp stones are also called ___
denticles
36
form during root development; dentinal tubules present; odontoblast located periphery
true pulp stones
37
form when components of pulp start to degenerate; dentinal tubules not present
false pulp stones
38
may be loose in the pulp, attached to the dentin wall, or embedded in the dentin tissue
both true and false
39
with age in the pulp, you have a decrease in::
intercellular substance, water, and cells
40
with age you also have a lower rate of collagen degradation which causes
increased collagen fibers
41
as the pulp ages, size does what
decreases because of continual deposition of dentin
42
is pulp vital after a root canal?
no
43
age within the pulp is reflected where
in dentin-- there is a cont. deposition of peritubular dentin, scelorotic dentin, etc
44
cementum is part of the ____
periodontium (tissues supporting and investing the tooth
45
what does the peridontium consist of
cementum, PDL, alveolar bone, and gingiva facing the tooth
46
what parts of the periodontium are derived from the dental follicle
cementum, pdl, alveolar bone
47
is cementum a highly calcified CT?
yes
48
cementum, alveolar bone, and PDL form attachment apparatus of
teeth, allowing teeth to be suspended in the jaw
49
bone: avascular or vasucular
vascular
50
cementum: vascular or avascular
avascular
51
bone contains:
nerve, and nutrient canals
52
cementum doesnt contain:
nerve and canals
53
inorganic, organic and water composittion of cementum
inorganic: 65% organic: 23% water: 12%
54
which cells are found in the cementum
cementoblasts and cytes
55
make cementum
cementoblasts
56
entrapped cementoblasts in cementum being produced
cementocytes
57
ground substance of cementum
proteoglycans
58
what shapes the root?
hertwig sheath begins to grow down after crown formation is complete
59
(cementum) which root sheath induces the formation of root dentin
inner root sheath
60
for cementum: the sheath breaks down to form the _____
epithelial rests of malassez
61
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)
cells of the dental follicle contacting new dentin
62
very little cementum is deposited on the developing root until
tooth reaches functional occlusion
63
how much of root has been formed when tooth erupts
2/3
64
two groups of fibers found in cementum:
extrinsic collagen fibers and intrinsic collagen fibers
65
aka sharpeys fibers; uncalcified fibers form pdl and are partially inserted into outer cementum at right angles(90); dental follicle produce these fibers
extrinsic collagen fibers
66
non pdl fibers produced by cementoblasts and run parallel to DCJ
intrinsic collagen fibers
67
acellular cementum is made:
made first; primary
68
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
acellular cementum
69
contains cementocytes trapped in lacunae due to fast rate of production
cellular ; secondary; less calcified
70
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
cellular cementum
71
occurs when resorption stops and cementum deposition begins; reflects remodeling or cementum; cen occur when associated with orthodontic movement or trauma to the teeth
reversal lines
72
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
cementicles
73
can present some clinical problems in differentiation from calculus
cementicles
74
near CEJ; symmetrical spheres of cementum attached to cemental root surface(similar to enamel pearls)
cemental spurs
75
local abnormal thickening of parts of the cememtum; apical region
hypercementosis
76
hypercementosis can be seen in cases of:
chronic inflammation of the tooth; loss in an opposing tooth; tooth becomes fused to the surrounding alveolar bone proper
77
there are how many types of CEJ relationships that can occur during the development of the tooth
3
78
percentage of cementum meets the enamel edge to edge
52%
79
percentage of cementum overlaps a small part of the enamel
15%
80
percentage of cementum and enamel do not meet, exposing dentin; patient may experience dentinal hypersensitivity
33%

oral embryology (10 decks)

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