1. According to the ADA system of numbering teeth, tooth number 19 would be A permanentMaxillary left central incisorMandibular left first molarMaxillary right second bicuspidMandibular left canine 2. Which of the following permanent teeth are least susceptible to carious attack?Mandibular molarsMaxillary caninesMaxillary premolarsMandibular incisors 3. Which tooth requires special attention when preparing the occlusal aspect for a restoration?mandibular first bicuspidmandibular second bicuspidmaxillary first molarmaxillary first bicuspid 4. Factors that affect the success of dentin bonding include all of the following except _____.Dentin factors such as sclerosis, tubule morphology, and smear layerTooth factors such as attrition, abrasion, and abfractionMaterial factors such as compressive and tensile strengthsC-factor considerations 5. The Highest concentration of mercury in a polished amalgam restoration, is in thePulpal areasCentre of the restorationMarginal areasEqually distributed all around 6. Gingival bevels can be safely and accurately placed usingSafe sided diamond disksMedium sandpaper disksMargin trimmersAngle formers 7. The best way to carve amalgam back to occlusal cavosurface margin is to _____.Use visual magnificationUse a discoid-cleoid instrument guided by the adjacent unprepared enamelMake deep pits and groovesUse a round finishing bur after the amalgam has set 8. Splinting of cervical root fracture should be done for40 days14 days4 weeks4 months 9. In the conventional Class I composite preparation, retention is achieved by which of the following features? 1.Occlusal convergence 2.Occlusal bevel 3.Bonding 4.Retention grooves2 and 41 and 31 and 42 and 3 10. Maximum injury to protective layer is duringIntrusionExtrusionLuxationConcussion 11. What is the disadvantage of resin restoration when using for class 2 cavity:Marginal leakageLow tensile strengthLow flexure strengthLow wear resistance 12. A desirable property of cement basesAdhesivenessHigh edge strengthLow coefficient of thermal conductivityHigh contact angle 13. A pin channel perforates the external surface of the tooth, all other factors are favorable, the next logical course of action should be toPlace a pin in the channel provided there is no extension beyond the tooth surfaceClean the channel and seal it with calcium hydroxide cementLine the channel with cavity varnish and cement the pin with inc phosphate cementSeal the channel with gold foil and observe the tooth for six weeks before restoring 14. There is abundant evidence that the initiation of dental caries requires a high proportion of:Lactobacillus within salivaStreptococcus mutans within dental plaqueLactobacillus within dental plaqueStreptococcus mutans within saliva 15. Cavity walls of a Class II inlay are:Flared occlusallyTapered occlusallyKept parallel to each otherMeet external surface at a butt joint 16. Which of the following are true statements regarding the polishing of amalgamit should be done about 10 minutes after placementocclusion should not be checked prior to polishingt prevents tarnishing of the restorationit should be done with a dry polishing powder 17. A cervical lesion should be restored if it _____.Is cariousIs very sensitiveIs causing gingival inflammationAll of the above 18. Although each carious lesion is individual and influenced by multiple factors, the carious process is generallyContinuousRapidIntermittentSlow 19. In the ADA Classification of inspection and examination, type 4 is:Examination using mirror, illumination, study model, radiographsExamination using mirror, probe, illumination and bitewing radiographsInspection using mouth mirror & probe / explorerScreening using tongue depressor, mirror & available illumination 20. When restoring severely broken down teeth, which pins are most retentive?ThreadedCementedInlayFrictional 21. Which protective mechanism in the oral cavity counteracts galvanism?An increase in the acidity of salivaPolarization and cataphoresisIncreasing the size of the metal restorationLontophoresis 22. In general, ductility ________ in temperature, whereas malleability ________ in temperature.Increases with increase, decreases with increaseDecreases with increase, increases with increaseIncreases with increase, increases with increaseNone of the above 23. Pre carve burnishing useful for all except:Removes excess mercuryBetter condensation of amalgam at margins of restorationIncreases setting timeInitiates carving 24. Occlusal dovetail in Class II inlay preparation:Resists proximal displacementResists occlusal displacementIncreases resistance from occlusal forcesAligns forces along long axis of tooth 25. When comparing the Axiopulpal depth of inlay cavity with that of amalgam, the inlay preparation has:Similar depth as an amalgam cavityReduced depth compared to amalgam cavityIncreased depth compared to amalgam cavityWider proximal box compared to amalgam cavity 26. Most important property of fissure sealants is:Inclusion of colouring agentsLow viscosityIncreased compressive strengthIncreased filler content 27. Class I cavity involves:Occlusal surface of premolars and molarsOcclusal and proximal surfaces of premolarsIncisal surface of anterior teethOcclusal surface of posteriors and lingual surface of anterior 28. A young child gets into the bathroom cabinet and ends up eating a full tube of toothpaste. The Mother calls you first, you will ask all of the following questions EXCEPT one. Which one is the EXCEPTION?How much does the child weigh?What kind of toothpaste was it?How old is the child?Did the child get into any other dental products (i.e., mouthwash)? 29. Silver alloy used for inlay preparation in primary teeth:EutecticSterlingHigh copperPeritectic 30. When using electrosurgery for management of soft tissue, the deciding factor for the current setting isProfoundness of anesthesiaTissue thicknessHealth of the patientAmount of fluid control desired 31. Important factor in determining the efficiency of bur is:Taper angleSpiral angleHead lengthHead diameter 32. What are the requirements of a good provisional restoration?Provide pulpal protectionBe able to be easily cleanedHave nonimpinging marginsAll of the above 33. Normally the endodontic post retaining a core-should extend toOne-third of the root lengthTwo-third of the root lengthHalf of the root lengthThe apex of the root 34. Retention for a Class 5 amalgam cavity is obtained byUndercutting the occlusal and gingival wallsGrooves placed mesially and distallyGrooves placed cervicallyUndercutting all the walls 35. Purpose of giving occlusal offset:EstheticsResistance and retentionGingival preservationStructural durability 36. The retention-resistance form of a Class II inlay cavity is dependent upon all of the following, exceptOcclusal dovetailProximal box formGingival bevelsFlat gingival and pulpal walls 37. Speed of medium category rotary instruments:3000-6000 rpm20,000-45,000 rpm45,000-100,000 rpm200-3000 rpm 38. Gingival bevel given in class II inlay preparation:35 degree40 degree45 degree20 degree 39. Delayed expansion of amalgam restorations is associated with which two factors? 1. Insufficient trituration and condensation 2. High residual mercury 3. The contamination of the amalgam by moisture during trituration and condensation 4. The failure to use a cavity varnish1 & 22 & 31 & 33 & 4 40. When the gingival margin is gingival to the CEJ in a Class II amalgam preparation, the axial depth of the axiogingival line angle should be _____.0.2 mm into sound dentinTwice the diameter of a No. 245 carbide bur0.75 to 0.80 mmThe width of the cutting edge of a gingival marginal trimmer 41. Which of the following would NOT necessarily indicate the need for root canal treatment or extraction of a carious tooth?lingering pain over 15 secondsnegative electric pulp testfrank apical radiolucencypercussion sensitivity 42. Many factor affect tooth/cavity preparation. Which of the following would be the least important factor?Extent of the defectSize of the toothFracture linesExtent of the old material 43. Action of primer is toRemoval of smear layerIncrease surface free energy of dentinForms thin layer between collagen and resinBonds with composite 44. What carat gold foil is used for direct filling restorations?16202224 45. Axial wall of a Class V cavity should usually be:ConcaveConvexFlatInverted 46. The cavosurface margin of inlay preparation should be:90 degreesBeveled at 30 degreesFeather edgeTapered 47. Retraction cord is often used with a hemostatic agent to capture an accurate impression. Which hemostatic agents minimize tissue damage?Fe2(SO4)3 and AlCl3ZnCl2 and AlCl3Fe2(SO4)3 and ZnCl2(SO4)2 and ZnCl2 48. Causes of postoperative sensitivity with amalgam restorations include all of the following except _____.Lack of adequate condensation, especially lateral condensation in the proximal boxesVoidsExtension onto the root surfaceLack of dentinal sealing 49. 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.One should not prepare locks entirely in the axial wall.Even if deeper than ideal, one should use the axial wall as a guide for proximal lock placement.One should place locks 0.2 mm inside the DEJ to ensure that the proximal enamel is not undermined. 50. A tooth may be restored with a porcelain jacket crown whenOnly the incisal angle involving enamel is missingTransverse strength is most neededEsthetics is essentialThe patient is very young 51. The principal goals of bonding are _____.Sealing and thermal insulationStrengthening teeth and estheticsEsthetics and reduction of postoperative sensitivitySealing and retention 52. Restoration of a MO cavity in a maxillary first bicuspid, is complicated byThe large mesiobuccal pulp hornThe presence of the cusp of CarabelliEstheticsThe Small palatal cusp 53. The tooth preparation technique for a Class I amalgam on a mandibular first molar does not include which of the following?Maintaining a narrow isthmus widthInitial punch cut placed in the most carious pitEstablishment of pulpal depth of 1.5 to 2 mmOrientation of bur parallel to the long axis of the tooth 54. In clinical practice we find commonly that some teeth show cervical concavities with enamel loss and vertical fracture lines extending towards the tip of clinical crown. This situation is defined as:AbfractionAbrasionErosionAttrition 55. Chronic caries is characterized by which of the following.pain is commoncommon in adultsentrance to the lesion is smalllesion is deep and narrow 56. Interstitial denticles are those denticles that areLying free in the pulpContinuous with the dentinal wallEntirely surrounded by secondary dentinHaving dentinal tubules within them 57. The main purpose of finishing the enamel wall of a prepared cavity is toSmoothen the walls of the cavity to permit accurate adaptation of the restorative materialRemove loose enamel rodsEnsure parallelism of the wallsPrevent microleakage 58. Which of the following is not a type of chisel?Angle formerGingival marginal trimerEnamel hatchetWelstadt chisel 59. A good preventive and treatment strategy for dental caries would include _____.Limiting cariogenic substrateControlling cariogenic floraElevating host resistanceAll of the above 60. Which of the following may be an adverse systemic reaction to aluminium chloride impregnated gingival retraction cords?Increased respiratory rateIncreased heart rateElevated blood pressureNone of the above 61. The greatest potential hazard of chronic mercury toxicity occurs due toSkin contact with mercuryInhalation of mercury vaporsDuring amalgam restoration in a patient ,Ingestion of amalgam scrap during removal of old restoration 62. When carving a Class I amalgam restoration, which statement is false?Carving may be made easier by waiting 1 or 2 minutes after condensation before it is started.The blade of the discoid carver should move parallel to the margins resting on the partially set amalgam.Do not carve deep occlusal anatomy.The carved amalgam outline should coincide with the cavosurface margins. 63. The success of an amalgam restoration is dependent on all of the following features of tooth/cavity preparation except _____.Butt-joint cavosurface margin that results in a 90-degree margin for the amalgamAdequate tooth removal for appropriate strength of the amalgamDivergent (externally) preparation wallsAdequate retention form features to mechanically lock the amalgam in the preparation 64. Irreversible denatured dentine is:Infected dentinAffected dentinDiscolored dentinNon affected dentin 65. The direction of mesial and distal walls of Class V cavity preparation is determined bySize of the carious lesionThe necessity for retentionDirection of enamel rodsGingivoaxial and occlusoaxial line angles 66. After doing proper etching, what is the ideal dept of the micropores created/microtags formed?0.5- 5 ?m5- 50 ?m50 -500 ?m500 -5000 ?m 67. Which of the following types and concentrations of fluoride should be recommended for home-care custom tray use by a patient with head and neck cancer1.23% acidulated phosphate fluoride and 1 % neutral sodium fluoride0.4% stannous fluoride and 1.23% acidulated phosphate fluoride0.4% stannous fluoride and 1 % neutral sodium fluoride1.23% acidulated phosphate fluoride, 0.4% stannous fluoride, and 1 % neutral sodium fluoride 68. Skirts are used in:Cast metal inlayClass 2 amalgamDirect filling goldCeramic inlay 69. A/An____________ base is a base that is typically placed over a calcium hydroxide base that has been placed over a pulp exposure.Primary baseSecondary baseDirect baseIndirect base 70. The use of the rubber dam is best indicated for _____.Quadrant dentistryTeeth with challenging preparationsDifficult patientsAll of the above 71. Dental plaque adheres to tooth surface byBacteriaSucroseDextroseEpithelial cells 72. Digital Fiber Optic Trans-illumination (DIFOTI) is used toDetect bony densityDetect calcium concentration in enamelDetect proximal cariesDetect occlusal caries 73. Wedge wedge technique is indicated in cases of:Gingival recessionConcavity on the proximal root surfaceDepression of interdental papillaLoose contacts 74. The material which is not as hard as the others, (lowest KHN) isComposite resinSilicateDentinZinc phosphate cement 75. While restoring a cavity, C factor is associated with:Condensing force for amalgamCarving pattern for amalgamCurvature of rootPolymerization shrinkage 76. Roughest cut surface on a tooth results fromMedium grit diamond at high speedMedium grit diamond at low speedCross cut fissure bur at high speedPlane fissure bur at high speed 77. Bonding of resins to dentin is best described as involving _____.Mechanical interlockingIonic bondingCovalent bondingVan der Waals forces 78. Core built up on a molar tooth should preferably be done with a chemically cured composite asLight cure resin lacks sufficient strength for a coreCore made with a light cure resin would be too opaque and esthetically unacceptableCore made with a light cure resin would be too brittle and would fracture easilyIts lower viscosity allows free flow of resin also around pins and post 79. Which of the following statements regarding dental amalgam alloy constituents Is true?Tin hastens setting timeSilver reduces edge strengthCopper reduces edge strengthNone of the above 80. Which of the following are similarities between amalgam Class II restorations and inlay Class II restorations, Exceptocclusal isthmus widthdepth into dentinconvergent walls on the occlusal surfaceaxiopulpal line angle shape 81. The ability of a cavity to resist dis-placement of the restoration in any direction, is due to theResistance formOutline formConvenience formRetention form 82. A dentin bonding agent has a hydrophilic and a hydrophobic end. Of the two ends, the hydrophilic end binds to the:Hydroxyapatite of hard tissuesCalcium of enamelCollagen of dentinResinous restorative material 83. Following the placement of an amalgam restoration, the tooth is most sensitive toSweetBitterColdHeat 84. The reduction of which of the following represents the most significant advantage of the acid etch techniqueMicroleakageShrinkage of restorative materialCoefficient of thermal expansion of restorative materialReduced porosity of restoration 85. Which cavities can involve only posterior teethclass Iclass IIclass Vclass VI 86. C factor is highest in which of the following:Class H cavityClass III cavityClass IV cavityClass V cavity 87. Cavities beginning on the proximal surfaces of premolars and molars are designated asClass VIClass IIClass IVClass Ill 88. Amalgam fillings are not indicated in which Class of cavities?Class 2Class 3Class 5Class 1 89. Abrasive particle size in fine grit diamond point:38-44 microns60-75 microns76-85 microns88-125 microns 90. What is the half-life of Hg in the human body?5 days25 days55 days85 days 91. The outline form of a cavity preparation is defined as:"that form the cavity takes to resist the forces of mastication""that form the cavity takes to resist dislodgement or displacement of the restoration""the shape or form of the cavity on the surface of the tooth""the shape or form of the preparation after carious dentin has been excavated" 92. 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 bandSingle wedgeDouble wedgeWedge wedgeNo wedge 93. Common between amalgam an ceramic is:High compressive strength and low tensile strengthEqual compressive and tensile strengthHigh compressive strength and high tensile strengthIncreased working and setting times 94. pH at which enamel demineralization starts:4.55.56.57.5 95. Which of the following is the most commonly used bleaching agent for endodontically treated teeth:CO2 snowSuperoxolChloroformHCL 96. Suspension liners, for example calcium hydroxide, harden intraorally by the:Chemical reaction of acids and basesChemical reaction involving polymerizationChemical reaction involving chelationPhysical reaction of drying 97. The functionally generated occlusal registration in the indirect gold inlay technique can be termedAnatomic registrationCentric relation of occlusionCentric relationStatic registration of dynamic occlusion 98. Pu1pal medication and thermal protection is givenSolution liner (2-50um)Suspension liner (20-25um)Cement liner (0.2-1mm)Cement base (1-2mm) 99. Class III cavity is defined as :Cavity involving anterior teeth involving the incisal angleCavity of proximal surface of anterior teeth not involving the incisal edgeCavity involving the labial surface of anterior teeth\Cavity involving the incisal edges of upper and lower anterior teeth 100. Preventive resin restoration is indicated inNoncavitated pit and fissuresDeep caries to prevent progress of lesionCavitated fissures which require restorationWide cavity to prevent cusp fracture Loading...