INBDE Endodontics

Question 1

Which test is most reliable for diagnosing pulp necrosis?

Accepted Answer

Electric pulp test

Answer

Thermal cold test

Answer

Thermal heat test

Answer

Percussion test

Question 2

The apical constriction (minor diameter) of the canal is located approximately:

Accepted Answer

0.5–1.0 mm coronal to the anatomic apex

Answer

At the radiographic apex

Answer

At the cemento-dentinal junction

Answer

At the mid-root level

Question 3

Sodium hypochlorite (NaOCl) is used as an irrigant in root canal therapy primarily because it:

Accepted Answer

Dissolves organic tissue and has broad antimicrobial activity

Answer

Chelates smear layer

Answer

Stimulates periapical healing

Answer

Prevents instrument fracture

Question 4

Vertical root fracture is most commonly associated with:

Accepted Answer

Excessive lateral condensation during obturation

Answer

Excessive irrigation pressure

Answer

Perforation with a post drill

Answer

Trauma from occlusion

Question 5

Gutta-percha is primarily composed of which material?

Accepted Answer

Trans-polyisoprene (rubber), zinc oxide, and barium sulfate

Answer

Zinc oxide and eugenol

Answer

Calcium hydroxide and silicone

Answer

Resin and glass ionomer

Question 6

Which radiographic finding is most consistent with a diagnosis of condensing osteitis?

Accepted Answer

Periapical radiopacity with diffuse borders

Answer

Periapical radiolucency with diffuse borders

Answer

Loss of lamina dura

Answer

Widened periodontal ligament space