A fresh set of 20 random questions is generated every time you open this page and every time you refresh it.For each of the following multiple choice questions, choose the most appropriate answer :
1. What is the basis for current endodontic therapy of a periapical lesion:
A. Due to rich collateral circulation system, the perpical area usually heals despite the condition of the root canal.
B. If the source of periapical irritation is removed, the potential for periapical healing is good.
C. Strong intracanal medications are required to sterilized the canal and periapical area to promote healing.
D. Periapical lesions, especially apical cyst, must be treated by surgical intervention
2. Cause that master G.P not reach working length although it is the same size of last file:
A. Dentin debris.
B. Ledge formation.
C. A and B
D. None of these
3. Which of the following failure may be treated non-surgically:
A. Post filling that has removed
B. Severe apical perforation
C. Very narrow canal with a periapical lesion and the apex cannot be reached.
D. None of these
4. The root canal treated teeth has the best prognosis when the root canal is instrumented and obturated:
A. To the radiograph apex.
B. 1 mm beyond the radiograph apex.
C. 1-2 mm short of the radiograph apex
D. 3-4 mm short of the radiograph apex
5. The radiographic criteria used for evaluating the successes of endodontic therapy
A. Reduction of the size of the periapical lesion
B. No response to percussion and palpation test.
C. Extension of the sealer cement through lateral canals.
D. None of these
6. Amount of G.P should after post preparation:
A. 1 mm.
B. 4-5 mm
C. 10 mm.
D. None of these
7. Pulp stone can be the following EXCEPT:
A. Present freely in the pulp.
B. Cause discomfort & pain to the patient
C. In radiographs,Small spheroidal radiopaque.
D. False stone occurs due to dystrophic dentin
8. Lesion similar to Endo Lesion:
A. Hyperparathyroidism
B. Initial stage of cemental dysplasia
C. Ossifying Fibroma
D. Dentigerous cyst
9. The irrigation solution is good because:
A. Lubricate the canals.
B. Flushes the debris and minimizing the No. of micro organism.
C. None of these.
D. All of these
10. The accesses opening for a maxillary premolar is most frequently:
A. Oval
B. Square.
C. Triangular.
D. None of these
11. RCT contraindicated in:
A. Vertical fracture of root
B. Diabetic patient
C. Unrestored teeth.
D. Periodontally involved teeth
12. Which of the following is the longest in the dental arch:
A. Maxiliary central incisor.
B. Maxiliary second premolar.
C. Mandibular canine.
D. Maxiliary canine
13. Treatment of internal resorption involves:
A. Complete extirpation of the pulp to arrest the resorption process
B. Enlarging the canal apical to the resorbed area for better access.
C. Utilizing a silver cone and sealer to fill the irregularities in the resorbed area.
D. Filling the canal and defect with amalgam
14. Sensitivity to palpation and percussion indicates:
A. Reversible pulpitis.
B. Irreversible pulpitis.
C. Hyperplastic pulpitis.
D. Inflammation of the periradicular tissues
15. Hyperemia of the pulp result in :
A. Trauma of occlusion.
B. Pain of short duration
C. Radiographic changes.
D. All of above
16. If the maxillary first molar is found to have four, the fourth canal is likely found:
A. In the disto-buccal root.
B. In the mesio-buccal root
C. In the palatal root.
D. None of these
17. Asymptomatic tooth has a necrotic pulp, a broken lamina dura, and circumscribed radiolucency of long duration. The periradicular diagnosis:
A. Acute apical periodontitis.
B. Chronic apical periodontitis
C. Acute exacerbation of chronic apical periodontitis.
D. Abscess
18. Post retention depends on:
A. Post length.
B. Post diameter.
C. Post texture.
D. All of these
19. Traumatically fractured crown of central incisor in an 8-years-old child with pulp exposure (more than 1 mm) half hour ago, medical history is non- contributory and the tooth is not displaced. What is your management:
A. Endodontics-pulpectomy and obturation.
B. Direct pulpcap with caoh and composite.
C. Caoh pulpotomy
D. Total extirpation of pulp and CaOH
20. Which one of the following is a disadvantage of autoclaving Endo instruments:
A. It can dull the sharp edges of instruments-cause corrosion- clean should done before
B. All forms of bacteria are not destroyed by it.
C. Compared to other technique it takes too long to sterilize.
D. None of these
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