Dentin Pulp Complex I

Question 1

What are the components of dentin?

Answer 1

70% inorganic
20% organic
10% water

Question 2

The inorganic material in dentin is mostly composed of

Answer 2

Hydroxyapatite

Question 3

The organic components of dentin is composed of?

Answer 3

90% collagen
(Mostly 1 and some 3,5)
10% non-collagenous proteins

Question 4

What are some of the non collagenous proteins found in dentin?

Answer 4

DMP-1
DSPP
DSP
DPP
DG

Question 5

What is dentin composed of that is also found in bone?

Answer 5

BSP
OP
OC
ON

Question 6

How is DSPP cleaved?

Answer 6

by BMP-1

Question 7

there are 3 types of deffects from dentin sialophosphoprotein…. what are they?

Answer 7

1: pulp chambers filled w/ dentin
2: also pulp chambers w/ dentin but not associated with OI
3: Enlarged pulp chambers

Question 8

Dentin is formed from

Answer 8

mesenchym that turns into odontoblasts which line the pulp chamber

Question 9

Where does the Dentin-pulp complex arise from?

Answer 9

the dental papilla

Question 10

odontoblasts fill what zone?

Answer 10

acellular zone (between the IEE and dental papilla)

Question 11

WHat shape does the DEJ have?

Answer 11

a scalloped edge

Question 12

2 important things about the shape of the DEJ what are they?

Answer 12

Defines Shape of the crown

Keeps dentin attached to enamal

Question 13

how is the DEJ bond together?

Answer 13

marging of HA of dentin and enamel

Question 14

WHat is the first layer of dentin

Answer 14

Mantle Dentin (close to DEJ)

Question 15

enamel spindles =

Answer 15

penetration of the IEE

Question 16

moving away from DEJ odontoblasts produce

Answer 16

matrix

Question 17

what do odontoblasts leave behind?

Answer 17

tomes fibers (future odontoblast process)

Question 18

initially is dentin mineralized

Answer 18

no (AKA predentin)

Question 19

what forms after DEJ formation?

Answer 19

circumpulpal dentin

Question 20

what does HER’s stand for?

Answer 20

Hertwigs root seath

Question 21

what does HERS break down into?

Answer 21

rests of Malassez

Question 22

primary dentin is composed of

Answer 22

mantle dentin and circumpulpal dentin

Question 23

secondary dentin is composed of

Answer 23

made throughout life and laid down after root formation

Question 24

3rd dentin arises when…

Answer 24

damage occurs to help protect the tooth.

generally no tubules

Question 25

define reactionary

Answer 25

trauma doesn’t hurt odontoblasts

Question 26

define reparative

Answer 26

damages odontoblasts

Question 27

interglobular dentin is

Answer 27

areas of hypomineralized dentin

Question 28

what are Owen- enhanced lines?

Answer 28

just a line that indicates disruption of tooth formation in dentin

Question 29

what are Granular layer of tomes?

Answer 29

funny looking dots around the roots in dentin

not too sure what causes it