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203 Cards in this Set

  • Front
  • Back
95 inorganic
1 organic
enamel
organic matric of enamel
=proline
mainly protein
begins -DEJ
extends-outer surface of crown
enamel rod
rods/crown
5-12 million
flare out from DEJ
rods increase in diameter
oldest enamel
DEJ
under cusp/cingulum
96 mineralized
enamel
inorganic matter =
hydroxyapatite
histo X-sec of Enamel=
translucent bc high inorganic
with time inorganic content of enamel
increase
selectively permeable membrane
enamel
allows water/ions to pass via osmosis
formed in increments by ameloblast
enamel rod
traverses uninterrupted thru enamel
rod
alternating light/dark lines in enamel that begin at DEJ
hunter schreger bands
end before reach E
hunter schreger bands
begins at future cusp
enamel formation
lines retzius
ameloblasts retreat in incremental steps
neonatal line
division btw enamel formed before birth/after birth
tiny valley on tooth surface
cirucumferentially around crown
perikymata
hypocalcified enamel rods
project from DEJ into enamel proper
enamel tufts

fxn unknown
pain receptors
enamel spindles
elongated odontoblastic processes
enamel spindles
defects in the enamel
looks like cracks/fx
-traverse entire lenght of crown from surface to DEJ
enamel lamellae
organic material
provide area for bacteria to enter
enamel lamellae
elongation >
differentiation >
deposition of D >
depostion of E
histogenesis
elongation of
inner enamel epi of enamel organ
differentiation
odontoblasts
cellular interaxns btw
epithelial/mesenchymal components of tooth germ
tooth dev
rope like fibers in periph of pulp
korff fibers
formation/dev of tissues in body
histogenesis
begins at future cusp
enamel formation
lines retzius
ameloblasts retreat in incremental steps
neonatal line
division btw enamel formed before birth/after birth
tiny valley on tooth surface
cirucumferentially around crown
perikymata
hypocalcified enamel rods
project from DEJ into enamel proper
enamel tufts

fxn unknown
pain receptors
enamel spindles
elongated odontoblastic processes
enamel spindles
defects in the enamel
looks like cracks/fx
-traverse entire lenght of crown from surface to DEJ
enamel lamellae
organic material
provide area for bacteria to enter
enamel lamellae
elongation >
differentiation >
deposition of D >
depostion of E
histogenesis
elongation of
inner enamel epi of enamel organ
differentiation
odontoblasts
cellular interaxns btw
epithelial/mesenchymal components of tooth germ
tooth dev
rope like fibers in periph of pulp
korff fibers
formation/dev of tissues in body
histogenesis
elongation
differentiation
deposition of D
deposition of E
histogenesis of tooth
elongation >
inner enamel epi cells
elongation influences
mesencymal cells on periph of dental papilla to differentiate >
odontoblasts
differentiation>
odontoblasts
tooth dev=
cellular interaxns btw epi and mesenchymal of tooth germ
ectomesenchyme influences oral epi >
epi grows down into ectomesenchyme > tooth germ
rope like fibers in periph of pulp

a/w formation of dentin matrix
korff fibers
layers of enamel organ
OEE
IEE
stratum intermedium
stellate reticulum
cell > ameloblast > E
IEE
essential to initiation of D formation once E is formed
IEE
lateral to IEE
stratum intermedium
essential to enamel formation
stratum intermedium
central core of enamel organ
stellate reticulum
after enamel formation all of enamel organ >
reduced enamel epi
enamel and epi come together as tooth in mouth erupts
dentoging jxn
dental pulp from
dental papilla
mesodermal tissue
dental papilla
communicated with PDL
apical foramen
pulp proper=
central zone
nerves/BV
pulp proper
like cell rich zone
pulpal core
contains fibroblasts
cell rich zone
capillary nerve plexus
zone of Weil=
cell free zone
plexus of raschkow
zone of weil
cell free zone
next to :
predentin
mature dentin
odontoblastic layer
70 inorganic
20 organic
10 water
dentin
organic substance in dentin
collagen
more mineralized than
cementum
bone
dentin
calcium hydroxyapatite
mineral phase
mineral phase=
inorganic matter
dentin like
bone
main cell type of dentin
odontoblast
odontoblast from
ectomesenchyme
harder than bone
dentin
enamel
lower modulus of elasticity
dentin
=more flexible
cellular component
dentin
dental papilla >
dentin
pulp
avascular
calcified
dentin
greatest abundance in tooth pulp
fibroblast
newly erupted tooth
pulp is large
physiological process of differentiation
bell
initiation
bud
cap
bell
appositional
maturation
odontogenesis
tooth dev
induction
initiation
initiation
6th wk
initiation stage=
interaxn
epi and mesenchyme>
dental lamina
proliferation
bud stage
8th week
bud
growth of dental lamina 10 buds/arch
bud stage/prolif
bud stage> mesenchyme prolif>
shape of tooth
enamel organ starts to form
bud stage
prolif and differentiation
cap stage
morphodifferentiation
histodifferentiation>
cap stage
9th-10th week
cap stage
tooth germ complete
end of cap stage=

initiation
bud
cap
bell
appositional
differentiation to its fullest extent
bell
enamel organ
bell
4 different cell types
bell
cuboidal
OEE
columnar
IEE
star shaped
stellate reticulum
dental papilla >
1-outer cells
2-cental cells
bell stage
dental sac
bell
dental sac >
increase in collagen
11-12th wk
bell
deposit the specifif dental tissue
appositional stage
mineralization begins @ DEJ
maturation stage
takes 2 yrs to complete
maturation stage
dental pulp fxn
form dentin
odontoblasts >
dentin
mesenchyme >
dentin pulp
pulp capping good for kids bc
1-apical foramen large
2-more odontoblasts
3-very vascular
4-less fibrous
5-more tissue fluid
lack a collateral circulation
young pulp
cementum fxn
rough surface anchorage for attachment of sharpey's
terminal portions of principal fibers of PDL
sharpey's
bone like rigid CT
cementum
compensates for loss of tooth surface due to occlusal wear by apical deposition
cementum
reparative fxn
cementum
collagen fibers
cellular components
cementum
periph layer of dev cementum that is uncalcified
cementoid
coronal 2/3 of root
acellular
contains cementoblasts
fibroblast form PDL
cementoclasts
cellular cementum
apical 1/3
cellular cementum
thickest to compensate for attritional wear on occlusal
cellular cementum
response to irritants >
reparative dentin
attrition
erosion
abrasion
dental caries
trauma >>>>>
reparative dentin
aging
sclerotic dentin
dentin tubules calcified/obliterated
sclerotic dentin
forms initial shape of tooth
primary dentin
deposited before completion of APICAL FORAMEN
primary dentin
dentin that is formed after completion
secondary dentin
compensates for loss of tooth surface due to occlusal wear by apical deposition
cementum
reparative fxn
cementum
collagen fibers
cellular components
cementum
periph layer of dev cementum that is uncalcified
cementoid
coronal 2/3 of root
acellular
contains cementoblasts
fibroblast form PDL
cementoclasts
cellular cementum
apical 1/3
cellular cementum
thickest to compensate for attritional wear on occlusal
cellular cementum
response to irritants >
reparative dentin
attrition
erosion
abrasion
dental caries
trauma >>>>>
reparative dentin
aging
sclerotic dentin
dentin tubules calcified/obliterated
sclerotic dentin
forms initial shape of tooth
primary dentin
deposited before completion of APICAL FORAMEN
primary dentin
dentin that is formed after completion
secondary dentin
compensates for loss of tooth surface due to occlusal wear by apical deposition
cementum
reparative fxn
cementum
collagen fibers
cellular components
cementum
periph layer of dev cementum that is uncalcified
cementoid
coronal 2/3 of root
acellular
contains cementoblasts
fibroblast form PDL
cementoclasts
cellular cementum
apical 1/3
cellular cementum
thickest to compensate for attritional wear on occlusal
cellular cementum
response to irritants >
reparative dentin
attrition
erosion
abrasion
dental caries
trauma >>>>>
reparative dentin
aging
sclerotic dentin
dentin tubules calcified/obliterated
sclerotic dentin
forms initial shape of tooth
primary dentin
deposited before completion of APICAL FORAMEN
primary dentin
dentin that is formed after completion
secondary dentin
regular uniform layer of dentin around pulp cavity
secondary dentin
sharp change in direction of dentinal tubules
jxn btw
primary/secondary dentin
perip layer of dentin

first layer of dentin depositted
mantle dentin
adjacent to
DEJ
CEJ
mantle
korff fiber
mantle
circumpulpal dentin
remaining dentin
lines each dentinal tubule
peritubular dentin
more mineralized than intertubular dentin
peritubular dentin
surrounds peritubular dentin
intertubular dentin
less mineralized
intertubular dentin
imperfectly calcified matrix
interglobular dentin
btw
calcified globules
near periph of dentin
interglobular dentin
tomes fiber
cytoplasmic cell process of odontoblast
each dentinal tubule contains
tomes fiber
coagulated cytoplasmic processes of dentinal tubules
dead tracts
aging process of dentinal tissue
dead tracts
caused by

caries
erosion
cavity prep
odontoblastic crowding
dead tracts
remnant of enamel formation
DEJ
first layer of dentin formed >
ameloblasts enter first formative state
secrete enamel matrix as retreat away from DEJ
ameloblasts
begin dentin formation immediately before enamel formation
odontoblasts
odtontoblasts lay down a collagen matix
dentinogenesis
move from DEJ inward towards pulp
dentinogenesis
adjacent to pulpal surface
new layer of dentin
calcification of tooth begins
DEJ
morphology of DEJ determined at
BELL stage
free nerve endings
only type of nerve ending
myelinated
unmyelinated
pulp
pulp nerves
afferent
sympathetic
sensory=
myelinated
motor
unmyelinated fibers
not found in pulp
proprioceptors
decrease reticulin fibers>
aged pulp
secondary/tertiary dentin >
aged pulp
increase collagen fibers
aged pulp
denticles
pulp stones
aged pulp
lie within PDL
cementicles
fused with cementum
cementicles