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. The pH of the calcium hydroxide is:
A. 7.2
B. 12
C. 19
D. 5.5
2. Teeth that are discolored as a result of internal resorption of the pulp may turn:
A. Yellow.
B. Dark brown.
C. Pink
D. Green
3. Amount of G.P should after post preparation:
A. 1 mm.
B. 4-5 mm
C. 10 mm.
D. None of these
4. All are irrigation for canals EXCEPT:
A. Saline.
B. Hydrogen beroxide.
C. Sodium hypochlorite
D. RC prep
5. The correct access cavity preparation for the mandibular second molar is:
A. Oval.
B. Quadrilateral.
C. Round.
D. Triangular
6. What is the estimated incubation period of HIV infection:
A. 6 months.
B. 3 years.
C. 6 years.
D. 10 years
7. 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
8. A patient with severe periradicular pain 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
9. 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
10. The normal response of a vital pulp to the electric pulp testing is:
A. No response.
B. Higher than that of the control teeth.
C. Lower than that of the control teeth.
D. In a range similar to that of the control teeth
11. Endomethasone is a root canal sealer that:
A. Dissolve in fluid so it weaken the root canal filling.
B. Very toxic contain formaldehyde.
C. Contain corticosteroids.
D. All the above
12. Which of the following may be used to disinfect gutta percha points
A. Boiling.
B. Autoclave.
C. Chemical solutions
D. Dry heat sterilization
13. Reparative dentine:
A. Second dentine.
B. Formed as dentine Bridge above the pulp
C. Highly tubular dentine and it is detective from first dentine.
D. Sclerosing dentine with less permeability
14. 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
15. 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
16. 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
17. Actual destruction of micro-organisms in the root canal is attributed mainly to:
A. Proper antibiotic thereby.
B. Effective use of medicament.
C. Mechanical preparation and irrigation of the canal
D. None of these
18. Bacteria in root canal Pathosis:
A. Mixed anaerobe and aerobe
B. Single obligate anaerobe.
C. Aerobic.
D. None of these
19. A 20 years old male patient came with severe pain on chewing related to lower molars. Intraoral examination reveals no caries, good oral hygiene, no change in radiograph. PT give history of bridge cementation 3 days ago. Diagnosis:
A. Pulp necrosis.
B. Acute apical periodontitis
C. Chronic apical abscess.
D. None of these
20. The basic difference between K files and reamers is:
A. The number of spirals or flutes per unit length.
B. The geometric cross section
C. The depth of flutes.
D. The direction of the spirals
Dr K Chaudhry 5 Alpha Inmternational City, Fatehabad 125050 M: 9810570740, 9810571993facebook.com/doctorkc