Free ADC Written Questions and Answers

Question 1

When a second canal is located in mandibular incisors, it is most frequently found:

Accepted Answer

lingual of the main canal.

Answer

labial to the main canal.

Answer

mesial of the main canal

Answer

distal to the main canal.

Question 2

In endodontics, which of the following perforations has the poorest prognosis?

Accepted Answer

Furcation area of a molar.

Answer

Apical to the epithelial attachment.

Answer

Coronal to the epithelial attachment.

Answer

Near the apex.

Question 3

Which of the following is/are true regarding a tooth filled with a formaldehyde-containing paste?

Accepted Answer

All of the above.

Answer

Formaldehyde-containing pastes remain non-approved.

Answer

The drug manufacturer may be liable, along with the dentist.

Answer

Formaldehyde-containing pastes have a high antigenic potential.

Answer

There are cases on record of paresthesia following over extrusion of such a paste in the vicinity of the mandibular nerve.

Question 4

When root canals are treated topically with antibiotics rather than with disinfectants:
1. A greater success rate results.
2. The same rules of mechanical preparation and filing must be observed.
3. The treatment may be completed in fewer appointments.
4. There is greater assurance that all microorganisms are destroyed.
5. There is a danger of sensitizing patients to antibiotics.

Accepted Answer

2,5

Answer

1,3,4

Answer

2,4,5

Answer

1,2,3

Question 5

The most appropriate management for a tooth with a history of previous trauma that now exhibits apical resorption is:

Accepted Answer

complete instrumentation and medication with intra-canal calcium hydroxide.

Answer

observation over 6 months for further resorption.

Answer

immediate instrumentation and obturation followed by apical curettage.

Answer

extraction, apical resection, retro filling, and replantation.

Answer

extraction and replacement with a fixed or removable prosthesis.

Question 6

A 2-year-old presents with a fracture of the incisal third of tooth 21. exposing a small amount of dentin. The fracture occurred one hour previously. There is no mobility of the tooth but the patient complains that it is rough and sensitive to cold. The most appropriate emergency treatment is to:

Accepted Answer

smooth the surrounding enamel and apply glass ionomer cement.

Answer

open the pulp chamber, clean the canal, and temporarily close it with zinc oxide and eugenol.

Answer

smooth the surrounding enamel and apply a calcium hydroxide cement.

Answer

place a provisional (temporary) crown.

Question 7

Which statement is FALSE regarding the use of a barbed broach?

Accepted Answer

Removal of gutta-percha during non-surgical re-treatment.

Answer

Removal of vital or non-vital pulp tissue.

Answer

Removal of food debris from the canal.

Answer

Removal of paper points and cotton pellets.

Question 8

The most appropriate management for at tooth with a history of previous trauma that now exhibits apical resorption is:

Accepted Answer

complete instrumentation and medication with intra-canal calcium hydroxide.

Answer

observation over 6 months for further resorption.

Answer

immediate instrumentation and obturation followed by apical curettage.

Answer

extraction, apical resection, retrofilling, and replantation.

Answer

extraction and replacement with a fixed or removable prosthesis.

Question 9

For an avulsed, fully developed permanent tooth that has been re-implanted, a favourable prognosis is most affected by the:

Accepted Answer

length of time the tooth has been out of the mouth.

Answer

use of an appropriate antibiotic.

Answer

effectiveness of the irrigation of the socket.

Answer

rigidness of the splint.

Answer

thoroughness of the curettage of the root surface.

Question 10

Root canal therapy may be safely and successfully undertaken for:
1. hemophiliacs.
2. patients with a history of rheumatic fever.
3. patients with rheumatoid arthritis.
4. cerebral palsy patients.
5. adolescent diabetics.

Accepted Answer

1,2,3,5

Answer

2,3,4

Answer

2,3,5

Answer

All of the above