Development of Dentin

Question 1

What kind of development is dentin?

Answer 1

Mesodermal development

Question 2

What kind of development is pulp?

Answer 2

Mesodermal development

Question 3

Describe the general timeline of dentin development

Answer 3

Bud, cap, bell

Question 4

Describe the general timeline of pulp development

Answer 4

Bud, cap, bell

Question 5

What also happens during the bud stage of the enamel organ?

Answer 5

Toward the end, mesenchymal cells become more rounded and condensed forming dental papilla cells

Question 6

What happens during the cap stage of the enamel organ?

Answer 6

1. Dental papilla cells continue to replicate
2. Cells become flattened and begin to appear at the base of the papilla, together they form the dental sac
3. VAN develops
4. Dental papilla determines the shape of the crown

Question 7

What happens during the bell stage of the enamel organ?

Answer 7

Dental papilla fills in completely

Question 8

When do mesenchymal cells become more rounded and condensed to form dental papilla cells?

Answer 8

End of the bud stage in enamel

Question 9

When do dental papilla cells continue to replicate?

Answer 9

Cap stage of enamel

Question 10

When is the dental sac formed?

Answer 10

Cap stage of enamel

Question 11

What makes up the dental sac?

Answer 11

Cells at the base of the dental papilla

Question 12

When do nerves and blood vessels develop in dentin?

Answer 12

Cap stage of enamel

Question 13

When and how is the shape of the crown determined?

Answer 13

When: Cap stage of enamel
How: Dental papilla

Question 14

When does the dental papilla fill in completely?

Answer 14

Bell stage of enamel

Question 15

Where do odontoblasts come from?

Answer 15

Peripheral cells of dental papilla change shape

Question 16

What happens when peripheral cells of dental papilla change shape?

Answer 16

They become odontoblasts

Question 17

What do odontoblasts secrete?

Answer 17

The dentin matrix

Question 18

What is the dentin matrix made of?

Answer 18

Mucopolysaccharide and collagen fiber matrix

Question 19

What is the function of the dentin matrix?

Answer 19

Barrier that cuts off flow to the preameloblasts

Question 20

Describe how the odontoblast travels

Answer 20

Inward towards the pulp

Question 21

What is the tail of the odontoblast called?

Answer 21

Odontoblastic process

Question 22

What is the odontoblastic process?

Answer 22

The tail of the odontoblast

Question 23

Where does the odontoblastic process reach to and from?

Answer 23

From the DEJ to the odontoblast cell body

Question 24

What is intertubular dentin?

Answer 24

Dentin matrix surrounding the odontoblastic process

Question 25

Dentin matrix that surrounds the odontoblastic process grows, becomes calcified, and forms what?

Answer 25

Intertubular dentin

Question 26

What is the peritubular dentin?

Answer 26

Highly calcified dentin that fills in the gaps between the intertubular dentin and the odontoblastic process

Question 27

What happens when the odontoblastic process begins shrinking?

Answer 27

Peritubular dentin fills in the gap between the intertubular dentin and the odontoblastic process

Question 28

What is the name of highly calcified dentin that fills in the gap between the intertubular dentin and the odontoblastic process?

Answer 28

Peritubular dentin

Question 29

What is the dentinal tubule?

Answer 29

Hollow space inside the peritubular dentin

Question 30

What is the hollow space inside the peritubular dentin?

Answer 30

Dentinal tubule

Question 31

The odontoblastic process is found inside of what structure?

Answer 31

Dentinal tubule

Question 32

What is inside the dentinal tubule?

Answer 32

Odontoblastic process

Question 33

Where do odontoblast cell bodies lie?

Why?

Answer 33

Outside the calcified dentin, lining the inside of the dentin and the outside of the pulp. So that they can keep making dentin.