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. Which of the following may be used to disinfect gutta percha points
A. Boiling.
B. Autoclave.
C. Chemical solutions
D. Dry heat sterilization
2. Apexification is procedure that:
A. Finds the most apical stop of the Gutta-Percha in RCT.
B. Induce the formation of a mineral barrier in the apical region of incompletely root
C. Is new in the endodontic field.
D. Involves the surgical removal of the apical region of the root and placement of a retrograde filling material
3. Post retention depends on:
A. Post length.
B. Post diameter.
C. Post texture.
D. All of these
4. Pulpal pain may NOT be referred from:
A. The right maxilla to the left maxilla
B. The third molar to the ear.
C. A max molar to the sinus.
D. A max cuspid to ear
5. 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
6. Among the reasons that molar teeth are more difficult to treat It Endo than anterior teeth:
A. Molar have more complex canal configuration.
B. Molar tend to have greater canal curvature.
C. A and B
D. None of these
7. Diagnosis prior to RCT should always be based on:
A. Good medical and dental history.
B. Proper clinical examination.
C. A periapical radiographs.
D. All of these
8. 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
9. Hyperemia of the pulp result in :
A. Trauma of occlusion.
B. Pain of short duration
C. Radiographic changes.
D. All of above
10. Amount of G.P should after post preparation:
A. 1 mm.
B. 4-5 mm
C. 10 mm.
D. None of these
11. The accesses opening for a maxillary premolar is most frequently:
A. Oval
B. Square.
C. Triangular.
D. None of these
12. Which of the following endodontic failure may be retreated only with surgery:
A. Missed major canal.
B. Persistent interappointment pain.
C. Past and core
D. Short canal filling
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. The pH of the calcium hydroxide is:
A. 7.2
B. 12
C. 19
D. 5.5
15. Teeth that are discolored as a result of internal resorption of the pulp may turn:
A. Yellow.
B. Dark brown.
C. Pink
D. Green
16. Actual destruction of the micro organism in root canal attributed mainly to:
A. Proper antibiotic therapy.
B. Effective use of medicaments.
C. Natural defenses in healthy person.
D. Mechanical preparation and irrigation of the canal
17. The correct access cavity preparation for the mandibular second molar is:
A. Oval.
B. Quadrilateral.
C. Round.
D. Triangular
18. 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
19. Dentin permeability
A. Decreases with the increase of cavity preparation.
B. Increase when sclerotic dentin develops under a carious lesion.
C. Increase with smear layer.
D. Bacterial toxins can pass through before the actual penetration of bacteria
20. 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
Dr K Chaudhry 5 Alpha Inmternational City, Fatehabad 125050 M: 9810570740, 9810571993facebook.com/doctorkc