EX2; Dentin/Pulp Complex 1 Flashcards Preview

May14 Oral Histology > EX2; Dentin/Pulp Complex 1 > Flashcards

Flashcards in EX2; Dentin/Pulp Complex 1 Deck (81)
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1

This the soft connective tissue in the tooth center with blood vessels and whole cells

pulp

2

Is the pulp mineralized or non-mineralized

non-mineralized

3

This is the mineralized connective tissue covering the pulp with no blood vessels or whole cells

dentin

4

What two things does dentin contain in the tubules

odontoblastic process
nerve endings

5

What is the main clinical significance of dentin

protective of both enamel and pulp

6

This feature of the DEJ facilitates adhesion

scalloping

7

When does dentinogenesi begin

during the bell stage

8

Just prior to dentinogenesis, what occurse

tissues layers of dental organ present
crown outline present
no odontoblasts or ameloblasts

9

In which part of the tooth germ does dentinogenesis begin

the most coronal portion

10

Where does the inductive signal for odontoblast differentiation come from

the enamel organ

11

What is the main signaling molecule/growth factor controlling odontogenesis

Wnt10a

12

This is a signaling molecule that follows Wnt10a; is induced by this

dentin/odontoblast specific marker; DSPP

13

The odontoblast secretes this first then it is mineralized

organic matrix then its mineralized

14

What is the name of the unmineralized organic matrix of dentin

predentin

15

What are the requirements for mineralization

Ca2+ and phosphate

16

Where does the phosphate come from used for mineralization

from plasma and cleavage of organic containing phosphate transported into dentin through and between odontoblasts

17

What are the two sections of crystal formation

mantle
circumpulpal

18

What is the principal component of the organic matrix of mantle dentin

collagen type 1

19

What are the sizes of the collagen fibrils in mantle dentin

relatively large

20

What is the orientation of the mantle dentin fibrils

at right angles to the basal lamina/future DEJ

21

Near the end of mantle dentin formation, what occurs

one dentin process becomes dominant

22

What is different about the circumpulpal dentin compared to mantle dentin

smaller fibrils
parallel to basal lamina

23

Where does the mineralization come from in circumpulpal dentin

not matrix vesicles, it comes from proteins

24

What is circumpulpal dentin synthesized from

synthesized and secreted from odontoblastic process (along with ions)

25

Special properties of the proteins involved in circumpulpal dentin formation

they precipitate Ca2+ ions preset in the interstitial fluid, initiate crystal formation

26

Which dentin is more organic

mantle dentin

27

Which dentin is more mineralized

circumpulpal dentin

28

The DEJ is more vulnerable to what

caries

29

How specific is phosphophoryn/dentin phosphoprotein

relatively specific to dentin

30

What is the prominent dentinal protein

>50% non-collagenous proteins (NCPs)