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_ is hydroxyapatite crystals
TERM 2
_ is organic collagen fibers and small amounts
of other proteins
DEFINITION 2
TERM 3
_ is water
DEFINITION 3
TERM 4
dentin is harder than
DEFINITION 4
bone or cementum
TERM 5
dentin tubules as well as the organic and
water content, make dentin _
DEFINITION 5
resilient
preameloblasts induce the cells of the dental
papilla to differentiate into
odontoblasts
TERM 7
odontoblasts secrete
DEFINITION 7
a collagen matrix of fibers (predentin)
TERM 8
deposition of dentin continues incrementally
until
DEFINITION 8
the pulp chamber is formed
TERM 9
three types of dentin
DEFINITION 9
primary, scondary, tertiary
TERM 10
primary dentin has two types
DEFINITION 10
mantle and circumpulpal
dentinal tubules run a _ course and contain _
_
wavy; odontoblastic processes
TERM 17
secondary dentin
DEFINITION 17
forms on the pulpal surface of primary dentin to protect the
pulp after clinical occlusal funtion once the roots are nearly
complete
TERM 18
secondary dentin is _ _ than primary dentin
and may have tubules with a _ _ _ _
DEFINITION 18
less mineralized; regular or irregular pattern
TERM 19
Tubules of primary & secondary dentin are
usually _ unless there is uneven deposition of
secondary dentin
DEFINITION 19
continuous
TERM 20
reparative dentin is
DEFINITION 20
tertiary dentin
tertiary dentin forms from
stimulation of dentinal tubules and the enclosed
odontoblastic process
TERM 22
rapid tertiary dentin formation
DEFINITION 22
may have cell inclusions & resemble bonereferred to as
osteodentin*
TERM 23
slow tertiary dentin formation
DEFINITION 23
resembles primary or secondary dentin
TERM 24
response dentin forms
DEFINITION 24
from severe injury requiring new odontoblasts
TERM 25
when original odontoblasts form tertiary
dentin
DEFINITION 25
reparative dentin
lateral processes that branch off of the S
curves of odontoblastic processes
are also called canaliculi, secondary branches, or
microtubules & are enclosed in the secondary tubules
TERM 32
The primary & secondary processes
provide
DEFINITION 32
vitality to the dentin
TERM 33
dentin that immediately surrounds the
dentinal tubule (a hypermineralized collar)
DEFINITION 33
Peritubular dentin
TERM 34
Peritubular dentin is more appropriately
called
DEFINITION 34
intratubular dentin
TERM 35
Intratubular dentin is not found in
DEFINITION 35
predentin (uncalcified) & the interglobular dentin
(hypomineralized)
The hypermineralization found in intratubular
dentin completely filling the tubule
sclerotic or transparent dentin
TERM 37
Sclerotic dentin is found
DEFINITION 37
in areas of stimulation such as overlying the pulp horns, near
the CEJ, attrition, abrasion, fracture, & caries
TERM 38
INTERTUBULAR DENTIN is _ _ _ as intratubular
dentin
DEFINITION 38
not as calcified
TERM 39
factors that increase dentinal
permeability
DEFINITION 39
Cone shape of tubules, Branching of the tubules, Increase
tubule diameter after etching due to greater peritubular
calcification, Formation of dead tracts which are more
permeable
TERM 40
what helps protect pulp
DEFINITION 40
Greater osmotic fluid pressure in pulp than at the DEJ forces
fluid out of exposed tubuleswill not completely prevent
migration through tubule to pulp, Smear layer-cut dentinal
debris blocks the tubule, Cavity liner
