DMD DMD Endodontics and Pulp Biology

Question 1

Which zone of the pulp contains the cell bodies of odontoblasts?

Accepted Answer

Odontoblastic layer

Answer

Cell-rich zone

Answer

Cell-free zone (Weil's zone)

Answer

Pulp core

Question 2

Which test is most reliable for confirming pulp vitality?

Accepted Answer

Laser Doppler flowmetry

Answer

Cold test (thermal)

Answer

Electric pulp test

Answer

Percussion test

Question 3

Irreversible pulpitis is characterized by which symptom?

Accepted Answer

Lingering pain after stimulus removal

Answer

Pain that subsides immediately after stimulus removal

Answer

Absence of response to cold

Answer

Spontaneous resolution of symptoms

Question 4

What is the function of the Weil's (cell-free) zone in the pulp?

Accepted Answer

It contains unmyelinated nerve fibers and capillaries but is relatively acellular, serving as a reserve for fibroblast migration

Answer

It forms secondary dentin

Answer

It provides immune surveillance

Answer

It directly transmits pain signals

Question 5

Which type of dentin is formed in response to caries or trauma as a protective response?

Accepted Answer

Tertiary (reparative) dentin

Answer

Primary dentin

Answer

Secondary dentin

Answer

Intertubular dentin

Question 6

Which microorganism is most commonly found in primary endodontic infections?

Accepted Answer

Mixed anaerobic flora

Answer

Streptococcus mutans

Answer

Enterococcus faecalis

Answer

Fusobacterium nucleatum