AGD Endodontic Diagnosis and Treatment 3

Question 1

A patient reports lingering pain to cold stimulation lasting more than 30 seconds in an otherwise intact tooth. What is the most appropriate treatment?

Accepted Answer

Root canal treatment

Answer

Lingering pain to cold lasting >30 seconds is a classic sign of irreversible pulpitis, which requires endodontic treatment to resolve.

Question 2

EDTA (ethylenediaminetetraacetic acid) is used in endodontics primarily to:

Accepted Answer

Remove the smear layer by chelating calcium

Answer

EDTA is a chelating agent that removes the inorganic smear layer from dentinal walls, improving sealer penetration into dentinal tubules.

Question 3

Which of the following is a contraindication to single-visit root canal treatment?

Accepted Answer

Acute apical abscess with systemic involvement

Answer

Acute apical abscess with systemic signs (fever, lymphadenopathy) is a contraindication to completing single-visit RCT, often requiring drainage and antibiotics first.

Question 4

The 'S-shaped' root canal curvature most commonly seen in which tooth?

Accepted Answer

Mandibular second premolar

Answer

The mandibular second premolar frequently has a dilacerated or S-shaped root, making canal navigation and instrumentation challenging.

Question 5

During retreatment, which solvent is most commonly used to soften gutta-percha for removal?

Accepted Answer

Chloroform or eucalyptol

Answer

Chloroform or eucalyptol softens gutta-percha to facilitate its removal during endodontic retreatment.

(AGD) Academy of General Dentistry Certification Practice Test

(AGD) Academy of General Dentistry Certification Practice Test

AGD Endodontic Diagnosis and Treatment 3