1. According to Kim et al Classification Class III isthmus indicates:A complete or incomplete isthmus between three or more canals.Complete isthmus with two canals with a definite connection between them.A very short, complete isthmus between two canals.Incomplete isthmus with a faint communication between two canals.Question 1 of 20 2. Interstitial denticles are those denticles that areContinuous with the dentinal wallLying free in the pulpEntirely surrounded by secondary dentinHaving dentinal tubules within themQuestion 2 of 20 3. When carving a Class I amalgam restoration, which statement is false?Do not carve deep occlusal anatomy.The blade of the discoid carver should move parallel to the margins resting on the partially set amalgam.The carved amalgam outline should coincide with the cavosurface margins.Carving may be made easier by waiting 1 or 2 minutes after condensation before it is started.Question 3 of 20 4. Diamonds remove tooth structure more efficiently than steel burs, but they leave undesirably rough surfaces and irregular cavosurface finish lines.The first statement is correct, but the second is falseBoth the statements are falseThe first statement is false, but the second is correctBoth the statements are correctQuestion 4 of 20 5. Chronic caries is characterized by which of the following.pain is commoncommon in adultslesion is deep and narrowentrance to the lesion is smallQuestion 5 of 20 6. A silver amalgam restoration is to be done in a posterior tooth with a proximal box extension with wide facio-lingual width. Which wedging technique should be used to well adapt the matrix bandNo wedgeWedge wedgeSingle wedgeDouble wedgeQuestion 6 of 20 7. Tooth with definite single root canal:Maxillar?y canineMaxillary central incisorMandibular first premolarMaxillary second premolarQuestion 7 of 20 8. A casting may fail to seat on the prepared tooth due to all of the following factors except _____.The occlusal of the prepared tooth was under reduced.Proximal contact(s) of casting are too heavy or too tight.Undercuts present in prepared tooth.Temporary cement still on the prepared tooth after the temporary restoration has been removed.Question 8 of 20 9. Which of the following is the most predominant organism in failed Root Canal Treatment casesStreptococciFusobacteriumE. FaecalisLactobacilliQuestion 9 of 20 10. A classic teardrop-shaped periradicular lesion on a radiograph can be indicative of a vertical root fracture. The prognosis of a vertical root fracture is hopeless, and the tooth should be extracted.First statement is false, second is true.Both statements are false.First statement is true, second is false.Both statements are true.Question 10 of 20 11. While doing a vital pulpotomy on a young, immature permanent tooth, the hemorrhage after pulp amputation could not be controlled with cotton pellets, even after several minutes. What is the next step in completing this treatment?Perform the amputation at a more apical levelIrrigate the canal with sodium ypochlorite then apply calcium hydroxideApply formocresol with cotton pellets at the amputation siteControl the hemorrhage with hemostatic agentsQuestion 11 of 20 12. The maximum chances of pulpal necrosis are seen in:AvulsionIntrusionExtrusionSubluxationQuestion 12 of 20 13. C factor is highest in which of the following:Class H cavityClass V cavityClass III cavityClass IV cavityQuestion 13 of 20 14. When using electrosurgery for management of soft tissue, the deciding factor for the current setting isProfoundness of anesthesiaAmount of fluid control desiredTissue thicknessHealth of the patientQuestion 14 of 20 15. Choose the incorrect statement about Class V amalgam restorations.Because the mesial, distal, gingival, and incisal walls of the tooth preparation are perpendicular to the external tooth surface, they usually diverge facially.If the outline form approaches an existing proximal restoration, it is better to leave a thin section of tooth structure between the two restorations (< 1 mm) than to join the restorations.The outline form is usually kidney- or crescent shaped.Using four corner coves instead of two full length grooves conserves dentin near the pulp and may reduce the possibility of a mechanical pulp exposure.Question 15 of 20 16. The endodontic access form is triangular in shape for which of the following teeth?Maxillary central incisor, maxillary first molar, and maxillary second molarMaxillary canine, maxillary first premolar, and maxillary lateral incisorMaxillary central incisor, mandibular central incisor, and maxillary lateral incisorMandibular central incisor, maxillary first molar, and maxillary first premolarQuestion 16 of 20 17. You completed a root canal procedure on tooth #9 approximately 6 months ago. Your patient is still reporting persistent symptoms of acute apical pathosis including sensitivity on mastication and a dull ache, and the periradicular radiolucency that was visible on your obturation radiograph has not appeared to decrease in size. The most likely reason for the persistence of these symptoms isTraumatic occlusionTrigeminal neuralgiaPhantom tooth painRoot canal failureQuestion 17 of 20 18. The setting reaction of dental amalgam proceeds primarily by _____.Dissolution of the Cu from the particles into mercuryPrecipitation of Sn-Hg crystalsMercury reaction with Ag on or in the alloy particleDissolution of the entire alloy particle into mercuryQuestion 18 of 20 19. Due to slowly advancing caries involving dentin, which of the following type of dentin may form in responseReparativeTertiarySecondaryScleroticQuestion 19 of 20 20. You are instrumenting a canal with a size 30, 25 mm k-type file. What does each of the sizes denote, respectively?The length of the file and the diameter of the tip of the fileThe diameter of the tip of the file and the length of the fileThe taper of the file and the length of the fileThe diameter of the tip of the file and the taper of the fileQuestion 20 of 20 Loading...
