AGD Endodontics and Pulpal Therapy 2

Question 1

Which irrigant is most effective at dissolving necrotic pulp tissue during root canal treatment?

Accepted Answer

Sodium hypochlorite 5.25%

Answer

Chlorhexidine 2%

Answer

EDTA 17%

Answer

Hydrogen peroxide 3%

Question 2

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

Accepted Answer

Remove the smear layer by chelating calcium

Answer

Dissolve organic tissue

Answer

Kill anaerobic bacteria

Answer

Lubricate hand files

Question 3

A patient presents with spontaneous, lingering pain that worsens with heat but is relieved by cold. What is the most likely diagnosis?

Accepted Answer

Irreversible pulpitis

Answer

Reversible pulpitis

Answer

Acute apical abscess

Answer

Symptomatic apical periodontitis

Question 4

Which obturation technique uses thermoplasticized gutta-percha injected into the canal?

Accepted Answer

Thermafil

Answer

Lateral condensation

Answer

Single cone technique

Answer

Warm vertical compaction

Question 5

The electronic apex locator measures which property to determine the apical constriction?

Accepted Answer

Impedance using multiple frequencies

Answer

Electrical resistance only

Answer

Capacitance of the periapical tissues

Answer

Temperature gradient near the apex

Question 6

Which condition is a contraindication to vital pulp therapy in a permanent tooth?

Accepted Answer

Spontaneous pain prior to treatment

Answer

Deep carious exposure with bleeding controlled in 5 minutes

Answer

Reversible pulpitis with small mechanical exposure

Answer

Mature apex with normal periapical tissues

Question 7

What is the minimum recommended apical preparation size to ensure adequate disinfection in most canals?

Accepted Answer

ISO size 35

Answer

ISO size 15

Answer

ISO size 25

Answer

ISO size 45