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NBDE anatomy > 208 -217 > Flashcards

208 -217 Flashcards

1
Q

pulp origin

A

ectomesenchymal cells of dental pappila

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2
Q

coronal pulp

A

found in pulp horn

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3
Q

radicular pulp

A

found n pulp cavity

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4
Q

has mesenchymal cells that form dentins

A

formative function of pulp

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5
Q

nourishes the avasc. dentin

A

nutritive function of pulp

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6
Q

free nerve endings provide pain sensation

A

sensory function of pulp

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7
Q

produce reparative dentin as needed

A

protective function of pulp

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8
Q

single layer of odontoblast lining pulp chamber

A

odontoblstic zone

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9
Q

cell free zone of Weil

A

devoid of cells (exccept during dentinogenesis)

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10
Q

has parietal plexus of nerves and plexus of BV

A

pulp

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11
Q

cell rich zone

A

fibroblast and undiff mesenchymal cells

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12
Q

fibroblast , macrophage, leukocye, blood and lymph vessels

my. symp. nerve fiebrs

collagen 1 and 3

ground substance

no elastic fibers

A

pulp core

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13
Q
A
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14
Q

denticles

A

concentric layers of mineralized tissues

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15
Q

true denticles

A

surround dentinal tubules or odontoblastic processes

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16
Q

surround dead cells or collagen fibers

A

false denticles

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17
Q

free denticles

A

located freelyin pulp chamber

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18
Q

attached denticles

A

attached to ant chmber wall

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19
Q

interstitial denticle

A

embedded in pulp chamber wall

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20
Q

dystrophic calcification

A

calcification of collagen bundles or collagen fibers surrounding BV and nerves

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21
Q

inc collagen fibers and calcifications

A

aging of pulp

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22
Q

dec. pulp chamber vol.

apical 4amen size

cells

vasc

sensitivity

A

effect of aging on pulp

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23
Q

avasc tissue about 10 micor meters thick covering radicular dentin

A

cementum

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24
Q

compositon close to bone

A

cementum

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25
Q

origin of cementum

A

diff. ectomesenchymal cells of dnetal follicle

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26
Q

provide attachment for teeth

prevent root resorption during tooth movement

A

cementum

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27
Q

formation functon of cementum

A

continual apical cementum deposition accounts for continual tooth eruption and movement

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28
Q

during root formation ——- cells of dental follicle migrate through gaps in—— —– and orient themselves along —— dentin.

Here they diff. to —– and sec. ——-

A

during root formation ectomes. cells of dental follicle migrate through gaps in Hertwigs root sheath and orient themselves along radicular dentin.

Here they diff. to cementoblast and sec. cementoid

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29
Q

As cementoblast —– away from dentin . matrix is —— and new layer of cementum matrix secreted/ these form —- lines, seen —–

A

s cementoblast retreat away from dentin . matrix is calcified and new layer of cementum matrix secreted/ these form resting lines, seen microscopically

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30
Q

cementoblast can be trapped in own matrix–> known as

A

cementocytes, residing in lacunae.

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31
Q

ementocytes

A

recieve nutrients via caniliculi that extend to PDL

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32
Q

constantly produced at apical portion of root

A

cementum

(accout for continual eruption of teeth)

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33
Q

hypercementosis

A

deposition of excessive cementum

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34
Q

primary cementum

A

first formed cementum

covers coronal cementum

acellular and consists of ext. collagen fibers

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35
Q

secondary cementum

A

overlies primary cementum

covers apical cmemetum

can be acellular or cellular

mde of mixed collagen fibers

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36
Q

has cementocytes

cementoblsts

cementoclsts

founf in areas of cementum

A

celular cementum

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37
Q

devoid of cells

coronal areas of cementum

A

acellular cementum

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38
Q

int. coll fibers

A

made by cementoblasts

parralel to tooth surface

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39
Q

Ext. coll. fibers

A

made by PDL

arranged perpendicular to tooth surface

when trapped in cementun, know as sharpies fibers

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40
Q

mixed coll. fibers

A

combo of intrinsic and extrinsic fibers

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41
Q

aging effects on cementum

A

inc. cementum depositon

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42
Q

cementum enables tooth movement b/c is more important to resorption than alv. bone

A

Cementum

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43
Q

alv. bone

A

bone in maxila and mandlible

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44
Q

interalveolar setpum

A

bony projection separating 2 alveoli

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45
Q

interradicular septum

A

alv bone b/n roots of multirooted tooth

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46
Q

origin of alv bone

A

diff. ectomes. cells of dental follicle

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47
Q

alv bone proper

A

thin layer of cortical bone

surronds teeth and into which PDL fibers are embedded

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48
Q

bundle bone

lamina dura

crib. plate

supporting alv. bone

A

alv bone proper

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49
Q

part of alveolus that surrounds alv bone proper

A

supporting alv bone

50
Q

coritcal bone

A

buccal and lingual outer surfaces of maxilla and mandible

51
Q

thicker in mandible and post regions

A

cortical bones(plate)

52
Q

cancellous bone

A

fills area b/n cortical plate

makes up majority of alv bones

53
Q

adiographic appearance of lamina dura determined by

A

x ray beam angulation and integrity

54
Q

radiograhic presense of crestal lamina dura

A

no correlation with periodontal attachment loss

55
Q

soft Ct b/n

A

tooth and alv bne

56
Q

.2 mm wide

but varies with tooth function and age

A

PDL

57
Q

diff. ectomes. cells of dental follicle

A

origin of PDL

58
Q

attachment of tooth to alv bone

A

functions of PDL

59
Q

cells responcible for formaton of peridontium

A

formative function fo PDL

60
Q

nutritive funnction of PDl

A

vasc network providing nutrient to cells

61
Q

sensory function of PDL

A

aff. nerve fibers responcible for pain pressure and propioception

62
Q

ell responcible for remodeling of peridontium

A

remodeling function of PDL

63
Q

most common cell of PDL

A

fibroblst

64
Q

cementoblasts or clasts

osteoblast and osteoclast

macrophage, mast cells, eosinophil

A

PDL

65
Q

undiff. mes. cell

A

PDL

66
Q

ground substance of PDL

A

PG

GAG

GP

H2O

67
Q

remnants of HERS

A

ep. rests of Malassez

closer to cementum than alv bone

68
Q

calcified mass either attached or unattached to root surfaces

A

cementicles

69
Q

mostly collagen type 1

but also type 3

A

principle collagen fibers

70
Q

transeptal fibers

A

interproximally over alv crest from cementum of one tooth to adjacent tooth.

resist mesial distal forces

71
Q
A
72
Q

extend obliquely from cementum just apical to JE to alv. crest

resist vertical force

A

alv. crest

73
Q

horizontal colagen fibers

A

extend at right angle fro cementum to alv. bone

resist lat. and rotational forces

74
Q

oblique fibers

A

extend obliquely from cementum to alv bone.

most abundant principle fibers

75
Q

mainr esistance to masticory forces

A

oblique forces

76
Q

apical fibers

A

extend from cemetum to alv bone at rot apices

resst vert. forces

77
Q

interradicular fibrs

A

extend from radicular cementum to interradicular alv bone. only on multirooted tooth.

resist vert forces

78
Q

oxytalin fibers

A

elastic like fibers

runnign parralel to tooth surface and bend to attach to cementum.

largely ass. with BV

79
Q

Vasc of PDL comes from

A

max artery

80
Q

periosteal veseels

A

to PDL from periosteum

(primary source of vasc)

81
Q

apical vessels

A

br. of dnetal vesels that supply apical regions of PDL

82
Q

trans alv. vessels

A

br. of transeptal vessels that perforate alv. bone proper

83
Q

anstomose vessels of

A

gingiva go to PDL

84
Q

nerve fibers of PDL

A

from trigem nerve

85
Q

free nerve ending

A

transmit pain and is most abundant

86
Q

ruffini corpsucle of nerve fiber in PDL

A

mechanoreceptor

87
Q

nerve fibers of PDL

A

have coiled and psindle endings

88
Q

lymphatics of PDL

A

drain to submand. LN

except mand. incisors which drain to submental nodes

89
Q

low PDL width

low cellularity and fiber content

A

aging on PDL

90
Q

teeth in hypofunction have

A

dec. PDL width with fibers arranged parralel to root

91
Q

teeth in hyperfunction

A

inc. PDL width.

92
Q

initation of odontogenesis

A

at week 6 inutero

underlying ectomes. cells induce overyling ectoderm to prolif. ,

form localized thickening at site of each tooth called dental lamina

93
Q

defects in inititation

A

anodontia or supernumeray teeth

94
Q

week 8 in utero

A

bud stage

95
Q

Bud stage; ectodermal and ectomes. cells prolif

A

to make round shape of tooth bud

96
Q

cap stage

A

week 9 in utero

enamel organ begins to form

1 layer cells at convex region (OEE) and concave region (IEE)

97
Q

B/n the 2 ep layers

A

loosely arranged Stellate retic.

(some cells of stellate retic. become densely packed near IEE and known as enamel knot

98
Q

dental pappila

A

condense ectomes. cells (w/in concavity of enamel organ)

99
Q

dentla follicle

A

capsule like encasing mesenchyme surround enamel organ

100
Q

succadaneus dental lamina

A

form adjaent to primary enamel organ

101
Q

dens in date

gemination

fusion

tubrcle

A

defected in cap stage

102
Q

bell stage

A

at week 11 in utero

103
Q

beel stage

A

morphogenesis and histodiff occur

104
Q

enamel organ

A

well defined;

OEE

IEE

Stratum Int.

StellateReticulum

105
Q

lateral to IEE

A

Stratum Int

106
Q

becomes more sparesly arranged due to INC PG synthesis

A

stellate retic.

107
Q

enamel knot disspappear

A

bell stage

108
Q

tall columnar

A

cells of IEE

(preameloblastS)

109
Q

cells of dental pap.

A

become tall and columnar

after preameloblast forms

(called preodontoblast)

110
Q

dental lamina disintegrates

and remnans known as

A

ep. rests of Serres

111
Q

DI

AI

macrodontia, microdontia

A

Bell stage defect

112
Q

start at week 14 in utero

A

Appos. stage

113
Q

REE forms when the SR. collapses merging OEE and IEE

A

APPOS stage

114
Q

secrete detin matrix first

A

odontoblast

115
Q

secrete enamel matrix after dentin is first formed

A

ameloblasts

116
Q

root formation begins

A

appos. space

117
Q

dental pappilar forms pulp tissue

A

APPOS stage

118
Q

dental follicle forms

A

alv bone

cementum

PDL

119
Q

enamel dysplasia

concrescence

enamel pearls

A

APPOS Stage

120
Q

starts at 4-6 months in utero

A

APPOS stage

121
Q

tarts at DEJ

and takes 2 years to finish

A

mineralization phase

122
Q
A

NBDE anatomy (23 decks)

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