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Endodontics
5th Year
Student Name: _______________________________
Computer No.: _____________________
Date: __________________
MULTIPLE CHOICE QUESTIONS - (Choose the most appropriate answer)
1. Anesthetic testing is most effective in localizing pain to which of the following?
a. Specific tooth.
b. Mandible or maxilla.
c. Across the midline of the face.
d. Posterior tooth.
2. Areas of rarefaction are evident on radiographic examination in which of the following?
a. When the tooth is responsive to cold.
b. When the tooth is responsive to percussion.
c. When a tooth fracture has been identified.
d. When the cortical layer of bone has been eroded.
3. The majority of patients with symptoms of severe odontogenic pain have a diagnosis of which of the following?
a. Periodontal abscess.
b. Irreversible pulpitis.
c. Acute apical periodontitis.
d. Acute apical abscess.
4. The best approach for diagnosis of odontogenic pain is which of the following?
a. Radiographic examination.
b. Percussion.
c. Visual examination.
d. A step-by-step, sequenced examination and testing approach.
5. In describing the sensory innervation of the dental pulp, which of the following statements is accurate?
a. A-delta fibers are high-threshold, myelinated fibers that transmit sharp, momentary pain.
b. C fibers are low-threshold, unmyelinated fibers that produce pain in response to inflammatory mediators.
c. The domination of C-fiber stimulation produces pain that is not well localized.
d. The sharp, well-localized pain to cold testing is conducted by both A-delta and C-fiber stimulation
6. Which of the following statements regarding the use of electronic-apex locators is accurate?
a. The patient is physically impaired.
b. Anatomic structures overlay the root apex.
c. A pregnant patient wishes to avoid exposure to x-rays.
d. All of the above statements are accurate.
7. Which of the following accurately describes external resorptions?
a. They are untreatable.
b. They can only be distinguished surgically from internal resorptions.
c. They appear to be superimposed over the root canal.
d. They always require root canal treatment.
8. Referral of difficult cases is indicated in which of the following?
a. The general dentist does not have the indicated equipment.
b. The general dentist does not have the indicated training and experience.
c. The general dentist is not sure what procedures are indicated.
d. All of the above.
9. Which of the following statements regarding one-appointment root canal treatment is accurate?
a. It is best performed in association with trephination or root end surgery.
b. It may predispose the patient to postoperative flare-ups.
c. It is equally successful as multiple-appointment root canal treatment.
d. All of the above statements are accurate.
10. Single visit is equivalent in outcome to multiple visits (to complete RCT) with what situation?
a. Vital pulp with acute pain.
b. Necrotic pulp with acute pain.
c. Necrotic pulp without pain.
d. Necrotic pulp with a draining sinus tract.
11. Root end surgery is indicated for endodontic failure in which of the following?
a. The dentist suspects a missed canal.
b. There has been coronal leakage.
c. A cast post and core and a well-fitting crown are present.
d. All of the above.
12. It is preferable to not extrude sealer beyond the apex for which of the following reasons?
a. The sealer usually does not resorb.
b. The sealer often stains or tattoos the tissue.
c. The sealer is a tissue irritant and may delay healing.
d. The sealer promotes bacterial growth.
13. Gutta-percha in contact with connective tissue is which of the following?
a. Relatively inert.
b. Immunogenic.
c. unstable.
d. Carcinogenic.
14. The primary reason to use a sealer and cement is which of the following?
a. Attainment of an impervious seal.
b. Canal disinfection.
c. Lubrication of the master cone.
d. Adhesion to dentin.
e. All of the above.
15. Considering lateral versus vertical condensation, studies have shown which of the following?
a. Lateral condensation results in a better seal.
b. Vertical condensation results in a better seal.
c. Both consistently fill lateral canals.
d. Sealability with either largely depends on the shape of the prepared canal.
16. A problem with nickel-and-titanium (NiTi) spreaders is which of the following?
a. Tendency to buckle under compaction pressure.
b. Tendency to break during condensation.
c. Creation of greater wedging forces, leading to root fracture.
d. They do not penetrate as deeply as stainless steel (SS) spreaders under equal force.
17. Moderate extrusion of obturating materials beyond the apex is undesirable because of which of the following?
a. There is more likelihood of postoperative discomfort.
b. Sealer and gutta-percha cause a severe, inflammatory reaction in periradicular tissue.
c. The prognosis is poorer.
d. All of the above.
18. In which of the following is one-visit root canal treatment not recommended?
a. The pulp is necrotic and not symptomatic.
b. The pulp is necrotic and symptomatic.
c. The pulp is necrotic and there is a draining sinus tract.
d. The pulp is vital and symptomatic.
19. When is an application of heater-injected gutta-percha potentially beneficial?
a. When there is an open apex.
b. When there are aberrations or irregularities of the canal.
c. When the clinician cannot master lateral condensation.
d. When the canals are curved and small after preparation.
20. Canals may be missed during treatment because of which of the following?
a. Calcification.
b. Anomalous location.
c. Inadequate access.
d. All of the above.
21. The major reason for failure, requiring retreatment, is which of the following?
a. Persistent pain.
b. Draining sinus tract.
c. Restorative indications.
d. Microleakage.
22. Presence of excess gutta-percha beyond the apex is usually caused by which of the following?
a. Use of too small a master cone.
b. Excessive heating and compaction during warm, vertical condensation.
c. Destruction of the natural apical constriction.
23. Lateral or furcal canals are which of the following?
a. Commonplace.
b. Not able to be mechanically cleaned.
c. Not routinely obturated.
d. Seldom the sole cause of endodontic failure.
e. All of the above.
24. Retreatment has the most favorable prognosis during which of the following?
a. When the cause of failure is identified and is correctable.
b. When the patient is asymptomatic.
c. When gutta-percha was used instead of paste.
d. When a surgical microscrope is used.
25. Questions 1 to 3 relate to the following radiograph.
The patient does not have symptoms. All teeth shown in the radiograph respond to pulp testing, except the canine.
1. The radiolucent structure (arrow) at the apex of the canine is likely which of the following?
a. Maxillary fracture.
b. Apical pathosis.
c. Nasopalatine duct.
d. Nutrient canal.
2. The radiographic appearance internally indicates which of the following?
a. Two likely superimposed canals.
b. Dentinogenesis imperfecta.
c. Dense accumulations of linear calcifications.
d. Calcific metamorphosis.
3. The recommended treatment and reason for the treatment is which of the following?
a. Root canal treatment; there is pulp pathosis.
b. Root end resection and root end filling; there is pathosis, but the pulp space is too small to attempt root canal treatment.
c. No treatment; there is no pathosis.
d. Extraction is prescribed.
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