Dr. Elggren and Dr. hume lecture

Question 1

The DEJ is formed from the dental papilla and what?

Answer 1

-Dental follicle

Question 2

What is the matrix protein of dentin?

Answer 2

-Collagen

Question 3

What gives dentin its characteristic structure?

Answer 3

-Odontoblastic process

Question 4

Why can dentin and pulp be considered a single biological entity?

Answer 4

-Because the dentinal tubules connect them

Question 5

What are the functions of the pulp?

Answer 5

• To make dentin (continues throughout life)
• Sensation
• Repair following insults

Question 6

What zone do you find under the odontoblasts?

Answer 6

-Cell free zone of Weil because it is so thick of nerve processes

Question 7

What causes the nerve cells to fire?

Answer 7

-When the fluid in the tubules move

Question 8

How long does it take for a chemical to move from the dentinal tubules to the pulp space?

Answer 8

-A couple of hours

Question 9

What is the first response from toxins/infection invading dentinal tubules?

Answer 9

-Chronic inflammation

Question 10

What are the symptoms of chronic inflammation?

Answer 10

• No symptoms

- Silence

Question 11

As a carious lesions gets worse and worse what type of inflammation do you get?

Answer 11

-Acute inflammation

Question 12

What are the symptoms of acute inflammation?

Answer 12

-Pain from cytokines that sensitize the nerves

Question 13

Initially what does that tooth become sensitive to?

Answer 13

-Hot and Cold usually cold first

Question 14

T/F If you take away the insult the pulp can heal

Answer 14

True

Question 15

T/F Internal tooth resorption is very common with bacterial insult

Answer 15

False

-It is very uncommon

Question 16

What are insults to the pulp that can occur during tooth restoration?

Answer 16

• Thermal
• Mechanical
• Chemical

Question 17

What is the response to thermal, mechanical, and chemical insults to the pulp?

Answer 17

-Pain because of acute inflammation

Question 18

If you dry cut to close to the pulp what can happen?

Answer 18

-You can kill the pulp

Question 19

What can cause insults to the pulp months or years after restoration?

Answer 19

-Bacterial micro leakage around restorations

Question 20

What are the pulpal responses to leaky restorations?

Answer 20

• Chronic inflammation
• Acute foci
• Pulp death if untreated

Question 21

Do normal teeth have a response to cold?

Answer 21

-Yes

Question 22

If you get a knee jerk reaction that goes away after one second what might that be a sign of?

Answer 22

-Normal response to patient as long as it goes away

Question 23

If you get pain after using an ice test after 6 seconds do you have a problem?

Answer 23

-Yes

Question 24

Is cold negative or positive pressure?

Answer 24

Negative

Question 25

If the neurovascular bundle has been severed is the pulp tissue dead?

Answer 25

-Yes

Question 26

What does a concussive effect do to the pulp?

Answer 26

-You get a few blood vessels that rupture

Question 27

What causes a tooth to darken in a concussive effect?

Answer 27

-The heme from the blood going into the dentinal tubules

Question 28

Why can’t pulp tissue heal itself?

Answer 28

• Limited blood supply

- Terminal end blood supply

Question 29

How can you fix discoloration of a tooth that needs endo?

Answer 29

-Internal bleaching