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NBDE anatomy > page 198-207 > Flashcards

page 198-207 Flashcards

1
Q

thcik strt sq

keratinized

stippling seen

A

mast. gingiva

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2
Q

thick strat sq.

keratinized

A

hard palate masticory

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3
Q

thin submucsa

A

hard palate masticatory

bucal mucosa

lips

ventral tongue

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4
Q

indistinct submucosa

A

gingiva masticory

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5
Q

taste bud

thin strat sq

non ker.

A

soft palate lining

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6
Q

thing strat sq

A

alv mucosa

floor of mouth

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7
Q

thick submucsa

A

soft palate

alveolar mucosa and floor of mouth

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8
Q

thick strat sq

nonker..

A

buccal mucosa

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9
Q

thin strat sq keratinized

A

lips

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10
Q

ventral tongue

A

thin strat sq

nonker

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11
Q

dorsal tongue

A

thick strat sq

both ker. and non ker.

taste buds

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12
Q

indistinct submucosa

A

dorsal tongue

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13
Q
A
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14
Q

fre attache ging.

A

located coronal to attached gingiva and is sep. from tooth structure by ging sulcus

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15
Q

interdental papila

A

triangular portion of free ging. located in interprox. embrasure b/n teeth just apical to contact areas

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16
Q

ging. col

A

depression in interdental ging. connecting buccal and lijngual papilla immediately apical to contact areas of adjacent teeth.

ep. is nonker. and its presense is based on presense of interdental contact

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17
Q

dentoging junction

A

attachment of gingiva to tooth

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18
Q

ep and CT

A

DGJ

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19
Q

formed as oral ep. fuses with REE during tooth eruption.

as tooth reaches fully erupted position, cell of the junc. ep.

replace those of REE

A

DGJ

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20
Q

sulcular ep.

A

strat. sq. non ker. ep. w/o rete pegs that extends from ging. margin to junc. ep.

lines the ging sulcus

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21
Q
A
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22
Q

junctinal ep.

A

strat to sigle layer nonker ep. w/o rete pegs that adhere to tooth surface at base of sulcus

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23
Q

provides ep. attachment to tooth.

have higher turnover rates and larger intercell spaces than sulcus and ging. ep.

A

junct. ep

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24
Q

ext. basal lamina

A

Junctional ep

attaches to underlying CT as elsewhere in body

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25
Q

attaches to cementum via hemidesmosome

doesnt have type 4 coll.

A

internal basal lamina

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26
Q

dentoging. CT

A

type 1 colagen makes up bulk of CT

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27
Q

fibroblast, leukocyte, mast ccell, elastic fibrin, PG, glycoproteins

A

DG CT

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28
Q

ging. fiber group

A

support ging. and aid in attachment in alv bone and teeth

continuous with PDL

resist ging. displacment

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29
Q

found at ging level

A

ging fiber groups

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30
Q

DG fibers

A

fan lateral from cementum into adjacent CT

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31
Q

alveolar fibers

A

fan coraonally from alveolar crest into adjacet CT

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32
Q

dentoperiosteal fibers

A

extend from cementum over the alveolar crest, and turn apically to insert into periosteum of buccal side of alv. bone

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33
Q

circumferential fibers

A

surround tooth in ciruclar fashion

help prevent rotational forces

located in lamina propia of marginal ging.

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34
Q
A
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35
Q

55; 45 cemenetum

A

mineral comp.; organic com of cementum

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36
Q

70;30

A

mineral ; organi compostiion of dentin

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37
Q

96;4

A

mineral to organic of enamel

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38
Q

50;50

A

mineral; organic of alv bone

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39
Q

5;95

A

mineral ; organic pulp

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40
Q

ectomes. (neural crest)

A

dentin

cementum

alv bone

pulp

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41
Q

ectoderm derived

A

enamel

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42
Q

ameloblast

A

enamel

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43
Q

odontoblast

A

dentin and alv bone

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44
Q

cementoblast

A

cementum

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45
Q

fibroblast and mesenchymal

A

pulp

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46
Q

dental follicle

A

cementum and alv bone

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47
Q

dental pap.

A

dentin

pulp

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48
Q

IEE

A

enamel

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49
Q

connective tisue

A

dentin

cementum

alv bone

pulp

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50
Q

epithelial

A

enamel

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51
Q

repair

A

dentin

cementum

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52
Q

remodeling

A

alv bone

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53
Q

no viability

A

enamel

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54
Q

has viability

A

pulp

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55
Q

neonatal retzius

A

enamel

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56
Q

neonatal owen von ebner

A

dentin

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57
Q

resting inc. line

A

cementum

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58
Q

resting reversal

A

alv bone

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59
Q

no inc. line

A

pulp

60
Q

no sensitivity

A

cementum

enamel

61
Q

has sensitivity

A

dentin

alv bone

pulp

62
Q

pdl ; pulp

A

nutrition supply for dentin; cementum

63
Q

vesel

A

alv bone and pulp

64
Q

no ntritive supply

A

enamel

65
Q

elastic avasc. mineralized tissue harder thanbone but softer than enamel

A

dentin

66
Q

yellow color

A

dentin

67
Q

diff. ectomes. clls of dental papilla

A

origin

68
Q

odontoblast elongate and the organelles become polarizedd by ameloblatic induction

A

dentinogenesis

69
Q

dentin matrix formed by odontoblast starts at DEJ and prgresses inward to eventual pulp.

A

mantle dentin formation

70
Q

dentin atrix 1t produced

A

type 1 collagen and ground substance known as predentin

71
Q

as odontoblast retreat inwar , leave cyt. extnensions called

A
72
Q

dentinal tubules house

A

odontoblastic proceesses( form channel from DEJ to pulp)

73
Q

odontoblastic processes

A

matrix vesicles containing Ca which chrystalize and rupture

74
Q

act as a bidus for formation of hydroxy apetite crystal in and around the organic dentin matrix

A

crystal from the odontoblastic processes

75
Q

iitial 150 micrometers of dentin =

A

mantle dentin

76
Q

circumpulpal dnetin formation

A

once mantle dentin formed odontoblast begin to secrete collagen fibrils perpendicular to odontoblastic processes as well as other other organic substances such as lipids phospholipids , phosphoprotiens

77
Q

mineralization occcurs by globular calcification by wich globules of HA fuse to form calcified mass.

A

when failed to fuse leave hypomin. interglobular dentin in b/n

78
Q

odontblastic processes shrink in width ; providing space for hyper mineralized peritbular dentin to form

A

if several adjacent dentinal tubules become occluded with peritub. dentin …takes on glassy appearance called sclerotic dentin

79
Q

interntubular dentin

A

most of circumpulpal dentin produced in b/n tubules

80
Q

dead tracts

A

group of necrotic odontoblastic processes w/in dentinal tubules

81
Q

reparative dentin

A

formed at specific sites of injury

82
Q

type 1 and 3 collagen

A

in matrix are produced by difff. odontoblast like cells

from pulp

83
Q

tubular pattern

A

distorted due to inc. rate of its formation

84
Q

first 150 microm of dentin formed

A

mantle dentin

85
Q

closest to enamel and cementum

A

mantle

86
Q

all dentin formed thereafter until tooth formationis complete

A

circumpulpal

87
Q

reparative dentin

A

formed in responce to trauma

88
Q

results from calcification of dentinal tubules as onesages over time

helps prevent pulpal irritation

A

sclerotic dentin

89
Q

primary root formation

A

formed before root completeion

tubule are most regular

90
Q

secondary root formation

A

formed after root completion

but not in responce to trauma

91
Q

tert. dentin

A

formed in responce to trauma

tubules are least regular

92
Q

peritubular dentin

A

hyper miner. dentin formed within the perimeter of dentinal tubules as odontoplastic processes shrinkk

93
Q

intertubular dentin

A

hypomin. dentin b/n dentinal tubules and makes up bulk of dnetin formed

94
Q

interglobular dentin

A

hypomin. dentin located b/n improperly fused HA globules

95
Q

cornal dnetin

A

contain hypomin. interglob. dentin

96
Q

contain dead tract

A

coronal dentin

97
Q

may contain hypomin. tomes granular layer

A

radicular dentin

98
Q

daily imb. line of von ebner

A

daily periodic bands

99
Q

contour lines of owen

A

wide ringx produced by met. disturbances during odontogenesis that run perpendicular to dentinal tubules

100
Q

neonatal lines

A

more pronounced contour line of OWen formed durign physiologic trauma at birth

101
Q

aging effects on dentin

A

inc. sclerotic dentin
inc. reparative dentin formation
inc. dead tracts

102
Q

dentinal hypersensitivity

A

my. nerve fibers have been found in dentinal tubules which can be stim. directly

changes in den. tubules fluid pressure may afect pulpal nerve fibers directly or cause damage to odontblast releasing mediators in pulp.

103
Q

den. imperfecta

A

AD

defects in dentin formation

teeth exhibit an opalescenet colot and bulb shaped crowns

dentin abnormally soft and pulp chambers are obliterated

104
Q

type 1 DI

A

occurs with OI

(blue sclera)

105
Q

type 2 DI

A

not ass. with OI

106
Q

type 3 DI

A

rare form exhibiting multiple pulp exposrues of primary dentin

107
Q

dentin dysplasia

A

AD defect in dentin formation and pulp morphology. tooth color is normal and often called rootless teeth because root dentin is usually affected more often than coronal dentin .

Roots are short, blunt or absent

108
Q

enamel

A

most calcified and brittle substnace in human body

color range from yellow to grayish white

semitranslucent

109
Q

diff. ectodermal cellfs of inner enamel ep.

A

origin

110
Q

ameloblast elongate and the organelles become polarized be4 the same occurs to odontoblast

A

amelogenesis

111
Q

enamel matrix made by ameloblasts

A

vertically perpendicularly to DEJ and progress outward to tooth structure.

112
Q

oldest enamel

A

at DEJ underlying cusp or cingulum

113
Q

ameloblastic activty

A

starts immediately after mantle dentin formation

114
Q

as ameloblast retreat

A

tomos process form around which enamel matrix proteins are secreted , most of which are almost immediately partially mineralized to form enamel matrix

determines structure and morphology of tooth

115
Q

final mineralization

A

happens with inorg. ions influx and removal of protein and water by cyclic ameloblastic activyt forming hydroxyapetite crystal

116
Q

HA crystal accum.

A

tightly stacked in elong units called enamel rods.

rodss surrounded by rod sheath and separated by interorod substance that made up of HA crystals aligned in diff. direction than rods themselves

117
Q

each keyhole shape enamel rod

A

formed by 4 ameloblast (1 for head

3 for tail)

118
Q

at cusp tip enamel rods

A

are more twisted and intertwined in formation known as gnarled enamel

119
Q

enamel matures

A

outer enamel ep , stratum int, stellate retic. colapse onto ameloblastic layer forming the REE

120
Q

REE worn away after tooth eruption and replaced by

A

salivary pellicle

(hemidesmosome also produced and provide ep attachment o tooth)

121
Q

daily imb. line

A

daily periodic bands

122
Q

more pronounce weekly periodic bands

A

striae of retzius

123
Q

shallow depression (perikymata)

A

formed on enamel surface where these lines reach tooth surface

124
Q

perikymata

A

disappear with age due to attrition of raised areas b/n them

125
Q

neonatal line

A

more apparent stria of Retzius formed during the physiologic trauma of birth

126
Q

hunter schreger bands

A

alt. light and dark zones produced only as optical phenomena during light microscopy of long. ground section

127
Q

enamel tufts

A

hypocalc. fan shaped enamel proteins projecting a short distance into enamel

128
Q

namel llamellae

A

hypocalc. enamel deficits that can extend all the way to enamel surface

consist of enamel protien or oral debris

129
Q

enamel spindles

A

trapped odontoblastic processed in enamel

130
Q

Age; attritiion

A

enamel wear by mast. forces

131
Q

Age; discoloration

A

becomes darker as more dentin visible

132
Q

less permeability with age

A

enamel crystals have accepted more ions esp. fluorid

133
Q

color of enamel depends on thickness

A

b/c it is translucent

134
Q

more translucent enamel is

A

more yellow it appears b/c underlying dentin more visible

135
Q

tetracycline

A

inc. into mineralizing tissues by chelation to divalent cations–> leads to browninsh graybanding within enamel. Drugs from this family shouldnt be giver until age 8.

136
Q

deformities of enamel

A

AI (AD or AR enamel defects)

137
Q

hypoplastic

A

enamel has abnormal thickness or pitting but normal hardness.

defect in enamel matrix formation

138
Q

hypocalcified

A

enamel has normal thickness but soft and chalky.

defect in enamel minerlaization

139
Q

hypomaturation

A

enamel has normal thickness, but abnormal hardness

milf forms–> snow capped incisal edges

severe forms–> lose translucency. defect in enamel maturation

140
Q

enamel hypoplasia

A

enamel hard but deficient in amount.

caused by defective or altered enamel matrix formation.

can be acquired or developmentally induced

141
Q

fluorosis

A

enamel is selectively permeable to h20 nd certain ions.

allows fluoride to concentrate in enamel apetite forming fluoroapetite(highly resistant to acid dissolution)

142
Q

enamel motting and brownish pigmentation

A

fluoride conc. > 5 parts per million(affect ameloblasic

enamel matrix secretion)

143
Q

nut. deficiency

A

vit A,C,D and Ca often lea to enamel pitting

144
Q

febrile disease at time of amelogenesis can halt enamel formation leaving bands of malformed surface enamel

A

infection of enamel

145
Q

cong. syphilis

A

causes incisors(hutchinsons incisor) to look screwdriver shaped and molars to look globular (mulberry molarS)

146
Q

Pulp

A

soft Ct that supports dentin and is contained inside the pulp chamber of tooth

147
Q

communicates to periodontal tissues via apical foramen and ass. canal

A

Pulp

NBDE anatomy (23 decks)

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