1. Important factor in determining the efficiency of bur is:Head lengthTaper angleHead diameterSpiral angleQuestion 1 of 20 2. With regard to the mercury controversy related to the use of amalgam restorations, which statement is incorrect?There is lack of scientific evidence that amalgam poses health risks to humans except for rare allergic reactions.Alternative amalgam-like materials (with low or no mercury content) have promise about mercury.True allergies to amalgam rarely have been reported.Efforts are underway to reduce the environmental mercury to which people are exposed to lessen their total mercury exposure.Question 2 of 20 3. You are halfway through the root canal treatment on tooth #30. To prevent bacterial growth in the canal between appointments, you decide to use an intracanal medication. The interappointment medicament of choice is:Calcium hydroxideChlorhexidineSodium hypochloriteEthylenediaminetetraacetateQuestion 3 of 20 4. Principal nerve fibres in Pulp are:B and C fibersA J3 and M fibers onlyUnmyelinated C fibers and myelinated A fibersMyelinated C fibers and unmyelinated A fibersQuestion 4 of 20 5. Maintenance of pulp vitality in a fracture of crown with pulp exposure fracture willImproves prognosis when done before treatmentImproves prognosis in immature teethImproves prognosis in mature teethDoes not affect prognosisQuestion 5 of 20 6. In class II cavity preparation the axial depth of gingival floor should be a minimum of:Gingival and pulpal floors should be at same level0.5 mm0.8 mm1.5 mmQuestion 6 of 20 7. When performing an endodontic re-treat procedure, gutta percha may be plasticized using each of the following except, which one is the exception?Sodium HypochloriteEucalyptolXylolChloroformQuestion 7 of 20 8. Which of the following statements regarding caries risk assessment is correct?The presence of restorations is a good indicator of current caries activity.The presence of dental plaque is a good indicator of current caries activity.The presence of restorations is a good indicator of past caries activity.The presence of pit-and-fissure sealants is a good indicator of current caries activity.Question 8 of 20 9. In the ADA Classification of inspection and examination, type 4 is:Examination using mirror, probe, illumination and bitewing radiographsScreening using tongue depressor, mirror & available illuminationExamination using mirror, illumination, study model, radiographsInspection using mouth mirror & probe / explorerQuestion 9 of 20 10. Bonding of resins to dentin is best described as involving _____.Mechanical interlockingIonic bondingVan der Waals forcesCovalent bondingQuestion 10 of 20 11. Which of the following statements about indirect pulp caps is false?The operator should wait at least 6 to 8 weeks before re-entry (if then).A liner is generally recommended in the excavation.Some leathery caries may be left in the preparation.The prognosis of indirect pulp cap treatment is poorer than that of direct pulp caps.Question 11 of 20 12. Initial instrumentation in endodontic treatment is done to the level of the _____.Cementodentinal junctionRadiographic apexDentinoenamel junctionCementopulpal junctionQuestion 12 of 20 13. For a dental hand instrument with a formula of 10-8.5-8, the number 10 refers to _____.The blade length, in millimetresThe blade angle, in centigradeThe primary cutting edge angle, in centigradesThe width of the blade, in tenths of a millimetreQuestion 13 of 20 14. Splinting of cervical root fracture should be done for40 days4 weeks14 days4 monthsQuestion 14 of 20 15. 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 causeActinomyces infectionFailure to resect root apexMissed accessory canalLeakage from poorly debrided or obturated canalQuestion 15 of 20 16. Factors that affect the success of dentin bonding include all of the following except _____.Dentin factors such as sclerosis, tubule morphology, and smear layerMaterial factors such as compressive and tensile strengthsTooth factors such as attrition, abrasion, and abfractionC-factor considerationsQuestion 16 of 20 17. An upper central incisor in a 7 year old child has an open apex and needs to undergo root canal treatment. The best way to determine the working length in this case is byUsing an apex locatorTactile methodPaper point methodRadiographic determination using IOPA X-rayQuestion 17 of 20 18. When placement of proximal retention locks in Class II amalgam preparations is necessary, which of the following is incorrect?One should not undermine the proximal enamel.Even if deeper than ideal, one should use the axial wall as a guide for proximal lock placement.One should not prepare locks entirely in the axial wall.One should place locks 0.2 mm inside the DEJ to ensure that the proximal enamel is not undermined.Question 18 of 20 19. Irreversible pulpitis pain in which of the following sites is most likely to radiate to the ear?Mandibular molarMaxillary molarMaxillary premolarMandibular premolarQuestion 19 of 20 20. Class III cavity is defined as :Cavity involving the labial surface of anterior teeth\Cavity involving the incisal edges of upper and lower anterior teethCavity of proximal surface of anterior teeth not involving the incisal edgeCavity involving anterior teeth involving the incisal angleQuestion 20 of 20 Loading...
