1. Gutta Percha and sealer form a monoblock known as:Quaternary monoblockSecondary monoblockPrimary monoblockTertiary monoblockQuestion 1 of 20 2. When a calcified root canal cannot be located or instrumentedIt is no longer accessible to bacterial infection.The dentist must proceed with the understanding that an unexplored or unfilled canal is worse than a perforation.Extraction is the treatment of choice.Retrograde and replantation procedures should be considered.Question 2 of 20 3. An individual reports with a non-vital central incisor with apex >1 mm in diameter (open apex). The treatment of choice is:Single sitting Obturation using MTAFormacresol pulpotomyConventional obturation with Gutta PerchaGlutaraldehyde PulpotomyQuestion 3 of 20 4. Which of the following defines the difference between a chronic apical abscess and a periapical cyst/granuloma?The border of the radiolucent lesionOnly histological examination can differentiateChronic apical abscess is asymptomaticChronic apical abscess is symptomaticQuestion 4 of 20 5. Which is not a property of sodium hypochlorite (NaOCl)?Tissue dissolution at higher concentrationsFlotation of debris and lubricationChelationMicrobicidal activityQuestion 5 of 20 6. When performing an endodontic re-treat procedure, gutta percha may be plasticized using each of the following except, which one is the exception?EucalyptolSodium HypochloriteChloroformXylolQuestion 6 of 20 7. Extension for prevention is directly related to theDepth of the cavityRemoval of unsupported enamel rods from the proximal surfacesOutline form of the cavityRounding of the line anglesQuestion 7 of 20 8. Polymerization shrinkage of composite causes compression stress of5 MPa15 MPa30 MPa1 MPaQuestion 8 of 20 9. Diamonds remove tooth structure more efficiently than steel burs, but they leave undesirably rough surfaces and irregular cavosurface finish lines.The first statement is false, but the second is correctThe first statement is correct, but the second is falseBoth the statements are falseBoth the statements are correctQuestion 9 of 20 10. The main objective of cavity preparation is toTreat cariesRestore occlusionRestore functionPrevent cariesQuestion 10 of 20 11. Which of the following statements regarding dental amalgam alloy constituents Is true?Silver reduces edge strengthCopper reduces edge strengthNone of the aboveTin hastens setting timeQuestion 11 of 20 12. Interstitial denticles are those denticles that areHaving dentinal tubules within themEntirely surrounded by secondary dentinContinuous with the dentinal wallLying free in the pulpQuestion 12 of 20 13. Affected dentin differs from infected dentin in that, it hasA soft leathery textureBeen calcifiedNot been invaded by microorganismsBeen invaded by microorganismsQuestion 13 of 20 14. Root canal cements shouldbe bacteriostatic.set quickly.be radiolucent.be bactericidal.Question 14 of 20 15. Which of the following may be used to fill the pathologic void of a non perforating internal resorption:Silver AmalgamGutta perchaAll of the aboveZinc oxide eugenolQuestion 15 of 20 16. The endodontic access form is triangular in shape for which of the following teeth?Mandibular central incisor, maxillary first molar, and maxillary first premolarMaxillary central incisor, mandibular central incisor, and maxillary lateral incisorMaxillary canine, maxillary first premolar, and maxillary lateral incisorMaxillary central incisor, maxillary first molar, and maxillary second molarQuestion 16 of 20 17. Distance of the blade from the shank to have anti-rotational design of instrument should be4 mm2 mm5 mm3 mmQuestion 17 of 20 18. Which modality is used to measure the rate of blood flow in pulp:Electric pulp testCold testHeat testLaser doppler flowmetryQuestion 18 of 20 19. Maintenance of pulp vitality in a fracture of crown with pulp exposure fracture willImproves prognosis in immature teethDoes not affect prognosisImproves prognosis when done before treatmentImproves prognosis in mature teethQuestion 19 of 20 20. A root canal treated anterior tooth had radiolucency at the apex. Curettage of the tooth was done and biopsy was performed. Two years later, the size of radiolucency was double its size at the time of surgery. What is the likely causeLeakage from poorly debrided or obturated canalActinomyces infectionMissed accessory canalFailure to resect root apexQuestion 20 of 20 Loading...
