INBDE Endodontics 2

Question 1

Which material is most commonly used as an intracanal medicament between appointments in root canal therapy?

Accepted Answer

Calcium hydroxide

Answer

Formocresol

Answer

Zinc oxide eugenol

Answer

Iodoform paste

Question 2

What is the primary purpose of EDTA in root canal treatment?

Accepted Answer

Removal of the smear layer (chelation of inorganic components)

Answer

Antimicrobial activity

Answer

Dissolution of organic tissue

Answer

Lubrication of instruments

Question 3

A maxillary first molar most commonly has how many canals?

Accepted Answer

4

Answer

2

Answer

3

Answer

5

Question 4

Internal root resorption appears radiographically as:

Accepted Answer

A symmetric oval or round radiolucency within the root canal space

Answer

A radiolucency with irregular borders around the root

Answer

Blunting of the root apex

Answer

External notching of the root surface

Question 5

What is the working length in endodontics?

Accepted Answer

The distance from a reference point to the apical constriction where instrumentation ends

Answer

The length of the root as measured on the radiograph

Answer

The full length of the root canal from orifice to apex

Answer

The length of gutta-percha used for obturation

Question 6

Which bacteria is most commonly found in failed root canal treatments?

Accepted Answer

Enterococcus faecalis

Answer

Porphyromonas gingivalis

Answer

Streptococcus mutans

Answer

Fusobacterium nucleatum