AGD Endodontic Diagnosis and Treatment 2

Question 1

A patient presents with a tooth that is tender to percussion but has no response to cold testing. Radiographically, there is a periapical radiolucency. What is the most likely diagnosis?

Accepted Answer

Pulp necrosis with symptomatic apical periodontitis

Answer

Pulp necrosis with symptomatic apical periodontitis presents with no pulp vitality response, percussion sensitivity, and periapical changes on radiograph.

Question 2

Which instrument is used to determine the working length electronically during root canal treatment?

Accepted Answer

Electronic apex locator

Answer

Electronic apex locators measure impedance differences to identify the apical foramen and determine accurate working length.

Question 3

During canal preparation, a file separates within the apical third of a curved canal. What is the FIRST recommended step?

Accepted Answer

Attempt ultrasonic retrieval if trained

Answer

Ultrasonic techniques can often retrieve separated instruments from the coronal and middle thirds; the decision to refer depends on fragment location and operator skill.

Question 4

Sodium hypochlorite is used as an irrigant during root canal treatment primarily because of its ability to:

Accepted Answer

Dissolve organic tissue and kill bacteria

Answer

Sodium hypochlorite is the gold standard endodontic irrigant due to its potent antimicrobial action and ability to dissolve pulpal remnants.

Question 5

A tooth diagnosed with a chronic apical abscess most commonly presents with:

Accepted Answer

A sinus tract draining to the mucosa

Answer

Chronic apical abscess is characterized by a sinus tract (parulis) that allows continuous drainage, often making the tooth asymptomatic.

(AGD) Academy of General Dentistry Certification Practice Test

(AGD) Academy of General Dentistry Certification Practice Test

AGD Endodontic Diagnosis and Treatment 2