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Terms in this set (54)
1. Which of the following tests is the
in endodontic diagnosis of children?
3. Electric pulp test
4. Cold test
Electric pulp test
2. Irreversible pulpitis pain in which of the following sites is most likely to radiate to the ear?
1. Maxillary premolar
2. Maxillary molar
3. Mandibular premolar
4. Mandibular molar
3. Which of the following diagnostic criteria is
in the assessment of the pulpal status of the
2. Electric pulp test
3. Spontaneous pain
4. Internal resorption
Electric pulp test
4. Which of the following can be viewed on a conventional radiograph?
1. Buccal curvature of roots
2. Gingival fibers
3. Calcification of canals
4. Periodontal ligament
Calcification of canals
5. Which of the following most likely applies to a cracked tooth?
1. The direction of the crack usually extends mesiodistally.
2. The direction of the crack usually extends faciolingually.
3. Radiographic exam is the best way to detect it.
4. 1 and 3 only
5. 2 and 3 only
The direction of the crack usually extends mesiodistally.
6. Which is the most likely to cause pulp necrosis?
7. Which of the following statements is/are
regarding treatment of a tooth presenting with a sinus tract?
1. Treat with conventional root canal therapy.
2. Antibiotics are
3. The sinus tract should heal in 2 to 4 weeks after conventional root canal therapy.
4. If the tract persists post-root canal therapy, do root-end surgery with root-end filling.
5. All of the above choices are true.
All of the above choices are true.
8. Features of focal sclerosing osteomyelitis often include:
1. A nonvital pulp test
2. A history of recent restoration of the tooth in question
3. A radiolucent lesion which, in time, becomes radiopaque
4. None of the choices are true
A history of recent restoration of the tooth in question
9. Once the root canal is obturated, what usually happens to the organism that had previously entered periradicular tissues from the canal?
1. They persist and stimulate formulation of a granuloma.
2. They are eliminated by the natural defenses of the body.
3. They reenter and reinfect the sterile canal unless root-end surgery is performed.
4. They will have been eliminated by various medicaments that were used in the root canal.
They are eliminated by the natural defenses of the body.
10. The major objectives of access preparation include all of the following
except which one?
1. The attainment of direct straight-line access to canal-orifices
2. The confirmation of clinical diagnosis
3. The conservation of tooth structure
4. The attainment of direct, straight-line access to the apical portion of the root
The confirmation of clinical diagnosis
11. Which of the following best describes the anesthetic effects of a posterior superior alveolar (PSA) nerve block?
1. Pulpal anesthesia of the maxillary second and third molars
2. Pulpal anesthesia of the maxillary first molar
3. Pulpal anesthesia of the maxillary first and second premolars
4. Pulpal anesthesia of the maxillary second premolar
Pulpal anesthesia of the maxillary second and third molars
12. Which one of the following cannot be observed on a conventional radiograph?
1. Canal calcification of tooth #15
2. Buccal curvature of the mesial root of tooth # 30
3. Type of canals of tooth #21
4. Open apex of tooth #8
Buccal curvature of the mesial root of tooth # 30
13. The indications for periradicular surgery include all of the following
except which one?
1. Procedural accidents during previous nonsurgical endodontic treatment
2. Irretrievable separated files in the canals
3. Failed nonsurgical endodontic treatment and persisting radiolucency
4. Treatment for a nonrestorable tooth
Treatment for a nonrestorable tooth
14. Which of the following teeth has the most consistent number of canal(s)?
1. Mandibular incisor
2. Mandibular canine
3. Maxillary canine
4. Mandibular premolar
15. Which is not a property of sodium hypochlorite (NaOCl)?
2. Tissue dissolution at higher concentrations
3. Microbicidal activity
4. Flotation of debris and lubrication
16. Initial instrumentation in endodontic treatment is done to the level of the __________.
1. Radiographic apex
2. Dentino-enamel junction
3. Cemento-dentinal junction
4. Cemento-pulpal junction
34. The apical portion of maxillary lateral incisor usually curves to the ___________.
17. While performing nonsurgical endodontic therapy, you detect a ledge. What should you do?
1. Use a smaller instrument and get by the ledge.
2. Fill as far as you have reamed.
3. Use a small, round bur and remove the ledge.
4. Continue working gently with larger files to remove the ledge.
Use a smaller instrument and get by the ledge.
48. What is the
recommended intracoronal bleaching chemical?
A. Hydrogen peroxide
B. Sodium perborate
C. Sodium hypochlorite
D. Carbamide peroxide
18. Which perforation location has the best prognosis?
1. Coronal third of root
2. Apical third of root
3. Chamber floor
4. Middle third of root
Apical third of root
19. Which of the following statements best describes treatment options for a separated instrument at the
initial stage of cleaning and shaping?
1. Immediate attempt to remove the instrument
2. Stop canal instrumentation, do not attempt removal, and obturate
3. Attempt to bypass the obstructed instrument
4. Both 1 and 3 are options
Both 1 and 3 are options
20. Which of the following is the
most significant cause
of ledge formation?
2. Remaining debris within the canal
3. No straight-line access
No straight-line access
-A classic teardrop-shaped periradicular lesion on a radiograph can be indicative of a vertical root fracture.
-The prognosis of a vertical root fracture is hopeless, and the tooth should be extracted.
1. First statement is true, second is false.
2. First statement is false, second is true.
3. Both statements are true.
4. Both statements are false.
Both statements are true.
22. The 02 taper on hand K-files is ___________.
1. 0.2-mm increase in diameter per 1-mm increase in length
2. 0.02-mm increase in diameter per 1-mm increase in length
3. 0.2-mm increase in diameter per 2-mm increase in length
4. 0.02-mm increase in diameter per 2-mm increase in length
0.02-mm increase in diameter per 1-mm increase in length
23. How should a vital second permanent molar with a 2.0-mm exposure on a
12 year old
patient be treated?
2. Direct pulp capping
3. Indirect pulp capping
24. At what stage is endodontic treatment considered complete?
1. When a temporary restoration is placed and the rubber dam removed
2. When canals are seared off and plugged
3. When the coronal restoration is completed
4. When the patient is asymptomatic
When the coronal restoration is completed
25. A patient complains of recent severe pain to percussion of a tooth. The most likely cause is ___________.
1. Acute periradicular periodontitis
2. Chronic periradicular periodontitis
3. Reversible pulpitis
4. Irreversible pulpitis
Acute periradicular periodontitis
26. Which of the following statements regarding post preparations is
1. The primary purpose of the post is to retain a core in a tooth with extensive loss of coronal structure.
2. The need for a post is dictated by the amount of remaining coronal tooth structure.
3. Posts reinforce the tooth and help to prevent vertical fractures.
4. At least 4 to 5 mm of remaining gutta-percha after post space preparation is recommended.
Posts reinforce the tooth and help to prevent vertical fractures.
27. Prolonged, unstimulated night pain suggests which of the following conditions of the pulp?
1. Pulpal necrosis
2. Mild hyperemia
3. Reversible pulpitis
4. Periodontal abscess
28. A nasopalatine duct cyst is located between ___________.
1. Two maxillary central incisors
2. Maxillary central and lateral incisors
3. Maxillary lateral and canine
4. Maxillary canine and first premolar
Two maxillary central incisors
29. Severity of the course of a periradicular infection depends upon the ____________.
1. Resistance of the host
2. Virulence of the organisms
3. Number of organisms present
4. Both A and B only
5. All of the choices are true.
All of the choices are true.
30. Informed consent requires that the patient be advised of the following except for which one?
1. The benefits of endodontic treatment
2. The cost of endodontic treatment
3. The risk of endodontic treatment
The cost of endodontic treatment
31. Which of the following statements
pulpal A-delta fibers when compared to C fibers?
1. Larger unmyelinated nerve fibers with slower conduction velocities
2. Larger myelinated nerve fibers with faster conduction velocities
3. Smaller myelinated nerve fibers with slower conduction velocities
4. Smaller unmyelinated nerve fibers with faster conduction velocities
Larger myelinated nerve fibers with faster conduction velocities
32. When compared to the bisecting-angle technique, the advantages of the paralleling technique in endodontic radiology include all of the following
1. A significant decrease in patient radiation
2. A more accurate image of the tooth's dimension
3. That it is easier to reproduce radiographs at similar angles to assess healing after treatment
4. The most accurate image of all the tooth's dimensions and its relationships to surrounding anatomic structures
A significant decrease in patient radiation
33. The primary reason for designing a surgical flap with a wide flap base is __________.
1. To avoid incising over a bony protuberance
2. To obtain maximum access to the surgical site
3. To maintain an adequate blood supply to the reflected tissue
4. To aid in complete reflection
To maintain an adequate blood supply to the reflected tissue
35. Aqueous EDTA is primarily used to ___________.
1. Dissolve organic matter
2. Dissolve inorganic matter
4. Prevent sealer from extruding out of the canal space
Dissolve inorganic matter
36. A non-carious tooth with deep periodontal pockets that do not involve the apical third of the root has developed an acute pulpitis. There is no history of trauma other than a mild prematurity in lateral excursion. What is the most likely explanation for the pulpitis?
1. Normal mastication plus tooth brushing has driven microorganisms deep into tissues with subsequent pulp involvement at the apex.
2. During a general bacteremia, bacteria settles in this aggravated pulp and produced an acute pulpitis.
3. Repeated thermal shock from air and fluids getting into the deep pockets caused the pulpitis.
4. An accessory pulp canal in the gingival or the middle third of the root was in contact with the pockets.
An accessory pulp canal in the gingival or the middle third of the root was in contact with the pockets.
37. On a radiograph, the facial root of a maxillary first premolar would appear distal to the lingual root if the __________.
1. Vertical of the cone was increased
2. Vertical of the cone was decreased
3. X-ray head was angled from a distal position relative to the premolar
4. X-ray head was angled from a mesial position relative to the premolar
X-ray head was angled from a mesial position relative to the premolar
38. If a canal is ledged during instrumentation, the best way to handle the problem is to ___________.
1. Continue instrumenting at the ledge. Although it may take some time, you will eventually bore your way to patency in the periodontal ligament space.
2. Immediately stop and fill to where the ledge begins.
3. Bind your irrigating needle in the canal and use short bursts of irrigant to loosen any debris blocking the canal. This will reopen the natural canal.
4. Prebend the tip of a small file, lubricate, and try to negotiate around the ledge.
5. Place citric acid or EDTA in the canal to soften the dentin. A small Gates Glidden or other rotary can be used to bypass the ledge.
Prebend the tip of a small file, lubricate, and try to negotiate around the ledge.
39. Which of the following factors affects long-term prognosis of teeth after perforation repair?
1. Gutta-percha filling
2. Gutta-percha filling followed by root-end surgery
40. Which of the following statements best describes treatment options for a separated instrument (e.g. finger spreader) at the
1. Immediately attempt to remove the instrument.
2. Do not attempt removal and proceed to obturate.
3. Attempt to bypass the obstructed instrument.
4. Both A and C are options
Do not attempt removal and proceed to obturate.
41. Endodontically treated posterior teeth are more susceptible to fracture than untreated posterior teeth. The best explanation for this is ____________.
1. Moisture loss
2. Loss of root vitality
3. Plastic deformation of dentin
4. Destruction of the coronal architecture
Destruction of the coronal architecture
42. There is a horizontal root fracture in the middle third of the root of tooth 10 in an 11- year-old patient. The tooth is mobile and vital. How should this be treated?
2. Pulpectomy immediately and splint
3. Splint and observe
4. Do nothing and follow up in 10 to 14 days.
Splint and observe
43. An 8-year-old boy received a traumatic injury to a maxillary central incisor. One day later, the tooth failed to respond to electric and thermal vitality tests. This finding dictates ___________.
3. Calcium hydroxide pulpotomy
4. Delay for the purpose of re-evaluation
Delay for the purpose of re-evaluation
44. Twisting a triangular wire best describes the manufacturing process of a ___________.
2. Barbed broach
3. Hedström file
4. K-Flex file
45. Direct pulp cap is recommended for teeth with _____________.
1. Carious exposures
2. Mechanical exposures
3. Calcification in the pulp chambers
4. Closed apices more than teeth with open apices
46. Which of the following is the treatment of choice for a 7-year-old child with a nonvital tooth 30 with buccal sinus tract?
1. Gutta-percha filling
2. Gutta-percha filling followed by root-end surgery
47. Which of the following is the main side effect of bleaching an endodontically treated tooth?
1. External cervical resorption
2. Demineralization of tooth structure
3. Gingival inflammation
External cervical resorption
49. Pulp capping and pulpotomy can be more successful in newly erupted teeth than in adult teeth because __________.
1. A greater number of odontoblasts are present
2. Of incomplete development of nerve endings
3. An open apex allows for greater circulation
4. The root is shorter
An open apex allows for greater circulation
50. Zinc oxide eugenol is a
temporary restoration because ___________.
1. It is less irritating
2. It has increased strength over other restorations
3. It provides a good seal
4. It is inexpensive
It provides a good seal
51. During a routine 6-month endodontic treatment recall evaluation, you note a marked
decrease in the radiograph size
of the periradicular radiolucency. Which of the following is the most appropriate treatment plan?
2. Nonsurgical endodontic retreatment
3. Recall the patient in another 6 months
4. Surgical endodontic treatment
Recall the patient in another 6 months
52. What is the radiographic sign of successful pulpotomy in a permanent tooth?
1. Open apex
2. That the apex has formed
3. Loss of periradicular lucency
4. No internal resorption
That the apex has formed
53. Which of the following statements is
regarding internal root resorption?
1. It happens rarely in permanent teeth.
2. It appears as an asymmetrical "moth-eaten" lesion in radiographs.
3. Chronic pulpal inflammation is the primary cause.
4. Prompt endodontic therapy will stop the process.
It appears as an asymmetrical "moth-eaten" lesion in radiographs.
54. Which of the following is the
best radiographic technique
to identify a suspected horizontal root fracture in a maxillary central incisor?
1. Multiple Water's projections
2. A panoramic radiograph
3. A reverse Towne's projection
4. Multiple angulated periapical radiographs in addition to a normal, parallel-angulated, periapical radiograph
Multiple angulated periapical radiographs in addition to a normal, parallel-angulated, periapical radiograph
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