1. While performing nonsurgical endodontic therapy you detect a ledge. What should you do?Use a smaller instrument and get by the ledge.Use a small, round bur and remove the ledge.Continue working gently with larger files to remove the ledge.Fill as far as you have reamed.Question 1 of 20 2. Pregnant patients in the first trimesterShould delay use of x-ray until the second trimester.Are not candidates for electronic apex locators.Are not at risk from pharmacologic intervention.Should receive the normal x-ray dose for endodontic therapy.Question 2 of 20 3. Flare-ups occur more oftenIn teenagers.In endodontic treatment of pulpless teeth.In endodontic treatment of vital teeth.In the afternoon and evening.Question 3 of 20 4. Which one of the following cannot be observed on a conventional radiograph?Open apex of tooth #8.Type of canals of tooth #21.Buccal curvature of the mesial root of tooth #30.Canal calcification of tooth #15.Question 4 of 20 5. The periapical lesion that would most likely contain bacteria within the lesion isperiapical granuloma.apical abscess.apical cyst.condensing osteitis.Question 5 of 20 6. Which of the following statements is true regarding the choice between doing a composite or amalgam restoration?Establishing restored proximal contacts is easier with composite.The amalgam is more difficult and technique sensitive.The composite generally uses a more conservative tooth/cavity preparation.Only amalgam should be used for Class II restorations.Question 6 of 20 7. Common component of most root canal sealers is:ZOEResinPrecipitated silverCalcium hydroxideQuestion 7 of 20 8. Retrograde (apical resection surgery) treatment is considered over orthograde treatment (root canal retreatment) for patients by their dentist after their root canal therapy is considered to have failed. When should retrograde treatment be performed over orthograde treatment?When the root canal filling materials are easy to removeIf the goal of treatment is to eliminate microorganisms from the root canal systemWhen an expensive, yet coronally sealed restoration would have to be refabricated to accommodate rthograde treatmentWhen a patient is anxious about traditional retreatment proceduresQuestion 8 of 20 9. The earliest and most common symptom associated with an inflamed pulp is:Pain on percussionA persistent feeling of discomfortSensitivity to hot and/or cold stimuliA dull throbbing pain on masticationQuestion 9 of 20 10. Which of the following is not true regarding a K file as compared to a reamer:Used in push & pull motionHas a square cross sectionIs more flexible than a reamerIt contains more flute than reamersQuestion 10 of 20 11. A 4-year-old child has fallen and hit his central incisor. Over time, the tooth has become increasingly more discolored and does not resolve. The most likely cause of the discoloration is:Enamel hypocalcificationSystemic drugsEndemic fluorosisIntrapulpal hemorrhageQuestion 11 of 20 12. The most frequently quoted disadvantage of using the rubber dam isTime consumptionNone of the aboveStaff allergies to materialCostQuestion 12 of 20 13. Which cells do not characterize the cellular response at the onset of pulpal inflammation?Polymorphonuclear (PMN) LeukocytesLymphocytesPlasma cellsMacrophagesQuestion 13 of 20 14. To avoid external transportation of the root canaluse large instruments.avoid the use of sodium hypochlorite.precurve instruments.use vigorous instrumentation.Question 14 of 20 15. Triturating a dental amalgam will _____.Coat the alloy particles with mercuryReduce the crystal sizes as they formDissolve the alloy particles in mercuryReduce the size of the alloy particlesQuestion 15 of 20 16. When luting a casting with resin cements, the flash should to removedTime of flash removal is not criticalImmediately after seating the castingAfter polymerization of the cement is completedWhen the cement is in rubbery stageQuestion 16 of 20 17. Which one of the following acids is generally recommended for etching tooth structure?Maleic acidPhosphoric acidTartaric acidPolyacrylic acidQuestion 17 of 20 18. If a carious lesion approaches pulp, the pain is referred to the adjacent teeth. The nerve fibres responsible for this are the:C fibresB fibresA ?A ?Question 18 of 20 19. Which of the following is not true when fixing the matrix band for filling a Class 2 cavity with amalgam? The matrix band shouldBe higher than the occlusal surface of the toothFit the cervical margin of the proximal box looselyProvide a physiological contour for the proximal surface of the restorationSupport the marginal ridge of the restoration during amalgam packingQuestion 19 of 20 20. Which type of corrosion is not seen in High Copper Amalgam,Chemical corrosionCorrosion does not occur at allPenetrating corrosionElectrochemical corrosionQuestion 20 of 20 Loading...
