1. Which of the following statements best describes treatment options for a separated instrument at the initial stage of cleaning and Immediate attempt to remove the instrument.Both A and C are options.Stop canal instrumentation, do not attempt removal, and obturate.Attempt to bypass the obstructed instrument.Question 1 of 20 2. What is run out of a burMaximum displacement of a bur head from its long axis of shaft during rotationMaximum displacement of bur head during active cutting of toothNumber of flutes on the head of a carbide burThe ability of a bur to cut through 2 mm of dentinQuestion 2 of 20 3. What percentage of EDTA is used for removal of smear layer in root canals:0.250.050.170.37Question 3 of 20 4. The indications for periradicular surgery include all of the following except which one?Procedural accidents during previous nonsurgical endodontic treatment.Failed nonsurgical endodontic treatment and persisting radiolucency.Irretrievable separated files in the canals.Treatment for a nonrestorable tooth.Question 4 of 20 5. Which of the following is not a point angle of a MO Class II cavity?AxiolinguopulpalDistolinguopulpalAxiofaciogingivalCervicogingivopulpalQuestion 5 of 20 6. What are the requirements of a good provisional restoration?All of the aboveHave nonimpinging marginsProvide pulpal protectionBe able to be easily cleanedQuestion 6 of 20 7. Root canal therapy was completed on a nonvital tooth that suffered trauma 5 years prior. At the time of obturation, the tooth exhibited a periapical radiolucency on radiographic examination. Radiographically, healing should be visualized in:1 month6 months6 weeks1 weekQuestion 7 of 20 8. Which is the most likely to cause pulp necrosis?AvulsionSubluxationExtrusionConcussionQuestion 8 of 20 9. Buccal cavity of Mandibular canine is to be restored with light cured composite. What should not be done?Bevelling of cavity marginsAcid etchingRemove soft dentinePulp cappingQuestion 9 of 20 10. Which is not a property of sodium hypochlorite (NaOCl)?Flotation of debris and lubricationChelationTissue dissolution at higher concentrationsMicrobicidal activityQuestion 10 of 20 11. A good preventive and treatment strategy for dental caries would include _____.All of the aboveLimiting cariogenic substrateControlling cariogenic floraElevating host resistanceQuestion 11 of 20 12. Which of the following permanent teeth are least susceptible to carious attack?Mandibular molarsMaxillary caninesMaxillary premolarsMandibular incisorsQuestion 12 of 20 13. The main benefit of primary incisor replantation isTo maintain child's self-esteemTo maintain child's social acceptanceTo relieve parental guiltMaintenance of a normal anterior dentitionQuestion 13 of 20 14. According to ADA specifications, ISO #2 endodontic instrumentsConstant taper of 0.02mm/mm across the lengthVariable taper instrument across the lengthInstruments with cutting tip2 variable tapers across the length of the instrumentQuestion 14 of 20 15. Streptococcus mutans are ____ and therefore ___Aciduric, CariostaticAciduric, CariogenicAcidogenic, CariostaticAcidogenic, CariogenicQuestion 15 of 20 16. In the inflammatory process, which of the following cell types function as phagocytes?Plasma cells and basophils.Macrophages and lymphocytes.Neutrophils and macrophages.Lymphocytes and neutrophils.Question 16 of 20 17. Class I cavity involves:Occlusal surface of premolars and molarsIncisal surface of anterior teethOcclusal surface of posteriors and lingual surface of anteriorOcclusal and proximal surfaces of premolarsQuestion 17 of 20 18. The material which is not as hard as the others, (lowest KHN) isComposite resinDentinZinc phosphate cementSilicateQuestion 18 of 20 19. Regardless of the nature of the sensory stimulus, all afferent impulses from the pulp result in the sensation oftouch.pain.heat.proprioception.Question 19 of 20 20. Electric pulp testing can give a false positive reaction in which of the following?Traumatic injury to teethCalcified root canalsAnxious patientPatient on NSAIDsQuestion 20 of 20 Loading...
