1. Traumatized tooth with a necrotic pulp shows a periapical area of rarefaction radiographically. The pulpal area is closed. Viable microorganisms might be cultured from the canal in approximately what percentage of the cases70 percent30 percent80 percent10 percentQuestion 1 of 20 2. An 8-year-old patient presents to your office for an emergency visit with a traumatic exposure of tooth #9. The treatment of choice for this patient isRoot-end closure procedure/apexificationTraditional root canal therapyPartial pulpectomyVital pulp therapy/apexogenesisQuestion 2 of 20 3. When removing caries, which of the following layers of dentin are affected, but not infected, and therefore do not need to be removed?Normal dentinInfected dentinTurbid dentinTransparent dentinQuestion 3 of 20 4. The reduction of which of the following represents the most significant advantage of the acid etch techniqueReduced porosity of restorationMicroleakageCoefficient of thermal expansion of restorative materialShrinkage of restorative materialQuestion 4 of 20 5. Micro abrasion is done using:10% HCL37% phosphoric acid10% HF acid20% Nitric acidQuestion 5 of 20 6. Which of the following is the most predominant organism in failed Root Canal Treatment casesStreptococciE. FaecalisLactobacilliFusobacteriumQuestion 6 of 20 7. The retention-resistance form of a Class II inlay cavity is dependent upon all of the following, exceptFlat gingival and pulpal wallsOcclusal dovetailGingival bevelsProximal box formQuestion 7 of 20 8. Silver cones are indicated in:Narrow canal wide till 20 or 25Calcified canalYoung patient with incomplete apexWide straight canalQuestion 8 of 20 9. An Asian patient presents to your office with pain bilaterally in her lower second premolars. Both teeth are sensitive to percussion and show periapical radiolucencies on radiographic examination. The teeth do not respond to either cold or electric pulp tests. There is an irregular bulge on the occlusal surfaces of each tooth. The most likely diagnosis is:Dens invaginatusIrreversible pulpitisPulp stonesDens evaginatusQuestion 9 of 20 10. Which of the following instrument is used for removal of pulp tissue and other soft materials from root canal/puIp chamber:K- FilesBarbed BroachesH- filesPro TaperQuestion 10 of 20 11. Delayed expansion of amalgam restorations is associated with which two factors? 1. Insufficient trituration and condensation 2. High residual mercury 3. The contamination of the amalgam by moisture during trituration and condensation 4. The failure to use a cavity varnish2 & 31 & 21 & 33 & 4Question 11 of 20 12. Tooth with maximum accessory canals attached to furcation area:Maxillary premolarMaxillary 1st molarMaxillary 2nd molarMaxillary 2nd premolarQuestion 12 of 20 13. What should be the first treatment for an acutely avulsed tooth. Immediate endodontic treatment and reimplantSterilize the root and reimplantGently replace with finger using light pressure, take radiograph and splintPulp protectionQuestion 13 of 20 14. Recognition of wall convergence angles in crown preparation will determine if undercuts are produced when taper is too small and if retention is undermined when taper is too large. What degree of wall convergence during crown preparation will give the prosthesis optimal retention?1 to 3 degrees6 to 9 degrees4 to 8 degrees3 to 6 degreesQuestion 14 of 20 15. At what stage is endodontic treatment considered complete?When canals are seared off and plugged.When the patient is asymptomatic.When the coronal restoration is completed.When a temporary restoration is placed and the rubber dam removed.Question 15 of 20 16. A 16 year old boy reports with a history of traumatic injury 3 hours back leading to the avulsion of the tipper permanent incisor. The tooth is present with the patient. Which of the following should be the line of treatmentSeal the apex of the tooth with retrograde amalgam restoration and replace the tooth.Wash the tooth with Normal saline, clean, replace the tooth in the socket, check with a radiograph and splintClean the tooth, autoclave, replace and splintScrape the eriodontal ligament curette the socket replace and splintQuestion 16 of 20 17. In the double cone pattern of proximal caries extending through enamel and dentin, the apices of the two conesAre directed towards each otherPoint towards the pulpAre directed towards the external surfacePoint in opposite directionsQuestion 17 of 20 18. Which of the following may be used to fill the pathologic void of a non perforating internal resorption:All of the aboveSilver AmalgamZinc oxide eugenolGutta perchaQuestion 18 of 20 19. Disadvantage of Minocycline in 3 mix triple antibiotic paste used for disinfection of root canal prior to revascularization is:Development of resistanceCrown discolorationMutation of certain microbesIncreased brittleness of toothQuestion 19 of 20 20. Which type of obturation technique requires heat?Vertical condensationChemically plasticizedMTA obturationLateral condensationQuestion 20 of 20 Loading...