AGD Endodontic Diagnosis and Treatment 5

Question 1

Which classification system is used to describe the complexity of root canal anatomy based on canal configuration?

Accepted Answer

Vertucci's classification

Answer

Black's classification

Answer

Angle's classification

Answer

Kennedy's classification

Question 2

A patient with an acute alveolar abscess presents with facial cellulitis and difficulty swallowing. What is the MOST urgent concern?

Accepted Answer

Airway compromise from spreading infection such as Ludwig's angina

Answer

Prescribing antibiotics only and scheduling RCT next week

Answer

Monitoring pain levels with analgesics

Answer

Placing a temporary restoration

Question 3

External cervical resorption (ECR) differs from internal root resorption (IRR) radiographically because ECR:

Accepted Answer

Appears eccentric to the canal and the canal outline remains intact through the lesion

Answer

Appears centered within the root canal and moves with the canal on CBCT

Answer

Is always associated with a periapical lesion

Answer

Only occurs in non-vital teeth

Question 4

The 'Schilder technique' in root canal obturation is characterized by:

Accepted Answer

Warm vertical compaction using heated pluggers

Answer

Single-cone cold lateral condensation

Answer

Carrier-based thermoplasticized gutta-percha injection

Answer

Cold lateral condensation with multiple accessory cones

Question 5

Calcium hydroxide is used as an intracanal medicament between appointments primarily because it:

Accepted Answer

Creates a highly alkaline pH that kills anaerobic bacteria

Answer

Softens gutta-percha for easier removal

Answer

Removes the smear layer from canal walls

Answer

Stimulates immediate hard tissue bridge formation

Question 6

Which of the following BEST describes the working length (WL) used in root canal treatment?

Accepted Answer

Length from a coronal reference point to 0.5–1 mm short of the radiographic apex

Answer

Length from the cusp tip to the radiographic apex

Answer

Length from the canal orifice to the cemento-dentinal junction

Answer

Length of the longest file that fits passively to the apex

Question 7

Which sealer is the BEST choice when post space will be needed immediately after obturation?

Accepted Answer

Zinc oxide–eugenol sealer (e.g., Pulp Canal Sealer)

Answer

Calcium hydroxide-based sealer

Answer

MTA-based sealer

Answer

Bioceramic sealer (e.g., BC Sealer)