1. Principle disadvantage of minocycline in triple antibiotic paste:Anaphylactic reactionsLeads to enamel hypoplasiaTeratogenicTooth stainingQuestion 1 of 20 2. To enhance crown preparation and retention, crown lengthening is completed byElectrosurgery in the presence of infrabony defects.Conventional gingivectomy in the presence of infrabony defects,Apicaily positioned flap, reverse bevel in the presence of infrabony defects.Laser surgery in the presence of infrabony defects.Question 2 of 20 3. Following restoration with gold, the tooth was sensitive to pressure, cold and heat, the best course of action is toRemove the restoration and start endodontic treatmentRemove the restoration and place a sedative temporary restorationRelieve the tooth of any occlusal contactObserve for two weeks and then decideQuestion 3 of 20 4. When antibiotic therapy is indicated before, during, or after root canal treatment the drug of choice iserythromycin.clindamycin.metronidazole.penicillin.Question 4 of 20 5. Retention of an inlay is influenced primarily by:Near parallel axial wallsPresence of contra bevelsFlat, pulpal and gingival wailPreparation of slots and covesQuestion 5 of 20 6. Ideal property of a root canal sealer is:Circular in morphology.Extrudes beyond the apical foramen.Seals and fills lateral canalFill the space between solid core material and pulp canalQuestion 6 of 20 7. When using bioactive substances for the repair, of a root perforation, which of the following zones will not be seenZone of proliferationZone of stimulationZone of hard tissue; formationZone of necrosisQuestion 7 of 20 8. Normally the endodontic post retaining a core-should extend toThe apex of the rootOne-third of the root lengthHalf of the root lengthTwo-third of the root lengthQuestion 8 of 20 9. Which of the following statements regarding ethylene diamine tetra-acetic acid (EDTA) is not trueNormally used in a concentration of 17%It can decalcify up to a 50 ?m thin layer of the root canal wallIt can be used in place of NaOCIIt is a chelating agent with the capability to remove the mineralized portion of the smear layerQuestion 9 of 20 10. pH at which enamel demineralization starts:4.56.57.55.5Question 10 of 20 11. Phoenix abscess is:Chronic exacerbation of acute periapical abscessChronic periapical abscessAcute exacerbation of chronic periapical abscessAcute periapical abscessQuestion 11 of 20 12. The material which is not as hard as the others, (lowest KHN) isComposite resinSilicateZinc phosphate cementDentinQuestion 12 of 20 13. Which of the following may be an adverse systemic reaction to aluminium chloride impregnated gingival retraction cords?Increased respiratory rateElevated blood pressureIncreased heart rateNone of the aboveQuestion 13 of 20 14. In order to complete a cutting circle of the anal wall, the triangular shaft instrument requires:1/3 turn1/4 turn1/2 turnFull turnQuestion 14 of 20 15. A dentin conditionerBonds the compositeThinly coats the collagen fibrils with resinRemoves the smear layerRaises surface free energy of dentinQuestion 15 of 20 16. A finishing bur has how many blades compared to a cutting bur?Fewer blades.More blades.Same number of blades.Number of blades is unrelated to the bur type.Question 16 of 20 17. Silver cones are indicated in:Narrow canal wide till 20 or 25Wide straight canalYoung patient with incomplete apexCalcified canalQuestion 17 of 20 18. Reaming action produces a canal of anatomy:RoundSquareOvalTriangularQuestion 18 of 20 19. 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 percent10 percent80 percentQuestion 19 of 20 20. Which of the following statements about an amalgam tooth/cavity preparation is true?Retention form for Class Vs can be placed at the DEJ.The cavosurface margin should provide for a 90-degree amalgam margin.All prepared walls should converge externally.The enamel cavosurface margin angle must be 90 degrees.Question 20 of 20 Loading...