Restorative- Pulp

Question 1

What are some of the primary histological differences between Normal pulp vs. Irreversible pulp?

Answer 1

-Some degree of necrosis (liquefactive or coagulation)
-Neutrophil presence
-Bacteria/biofilm in pulp or nearby dentin

Question 2

What is the defining histological characteristic of irreversible vs. reversible pulpitis?

Answer 2

Bacterial presence

Question 3

What stimuli is carried by A-fibers?

Answer 3

Sharp, stabbing pain
Easily localized
Responds to EPT and cold
A-beta is more sensitive to vibration

Question 4

What stimuli is detected by C-fibers?

Answer 4

Dull, aching, diffuse, burning pain
Activated by heat
Referred pain
Responds to heat testing

Question 5

What is the significance of substance P?

Answer 5

It is released when there is nerve activation and altered blood flow and stimulates inflammatory process
Teeth with irreversible pulpitis have higher substance P levels

Question 6

What role may odontoblasts play in detection of stimuli?

Answer 6

In exposed tubules, signal transmitted to pulp via odontoblasts
May also be able to sense hot/cold