Dentin Pulp Complex I Flashcards
What are the components of dentin?
70% inorganic
20% organic
10% water
The inorganic material in dentin is mostly composed of
Hydroxyapatite
The organic components of dentin is composed of?
90% collagen
(Mostly 1 and some 3,5)
10% non-collagenous proteins
What are some of the non collagenous proteins found in dentin?
DMP-1 DSPP DSP DPP DG
What is dentin composed of that is also found in bone?
BSP
OP
OC
ON
How is DSPP cleaved?
by BMP-1
there are 3 types of deffects from dentin sialophosphoprotein…. what are they?
1: pulp chambers filled w/ dentin
2: also pulp chambers w/ dentin but not associated with OI
3: Enlarged pulp chambers
Dentin is formed from
mesenchym that turns into odontoblasts which line the pulp chamber
Where does the Dentin-pulp complex arise from?
the dental papilla
odontoblasts fill what zone?
acellular zone (between the IEE and dental papilla)
WHat shape does the DEJ have?
a scalloped edge
2 important things about the shape of the DEJ what are they?
Defines Shape of the crown
Keeps dentin attached to enamal
how is the DEJ bond together?
marging of HA of dentin and enamel
WHat is the first layer of dentin
Mantle Dentin (close to DEJ)
enamel spindles =
penetration of the IEE
moving away from DEJ odontoblasts produce
matrix
what do odontoblasts leave behind?
tomes fibers (future odontoblast process)
initially is dentin mineralized
no (AKA predentin)
what forms after DEJ formation?
circumpulpal dentin
what does HER’s stand for?
Hertwigs root seath
what does HERS break down into?
rests of Malassez
primary dentin is composed of
mantle dentin and circumpulpal dentin
secondary dentin is composed of
made throughout life and laid down after root formation
3rd dentin arises when…
damage occurs to help protect the tooth.
generally no tubules
