Dental caries-Quiz Welcome to your Dental caries-Quiz 1. All of the below given factors are responsible for causing dental caries exceptDental plaqueDietMicroorganismsTemperature2. According to Miller, which of these acids was held responsible for producing the lesions of dental caries, according to Miller?Lactic acidAscorbic acidPicric acidCitric acid3. Which of these factors has not been assigned an essential role in Miller’s chemicoparasitic theory of dental caries?CarbohydratesMicroorganismsHeredityAcids4. From the properties given below identify which one does render carbohydrates cariogenic?Rapid clearance from oral cavityStickiness of carbohydratesFrequent ingestion of carbohydratesSimple carbohydrates5. Identify which amongst the below given bacteria does not cause dental caries.S. mutansL. acidophilusA. naeslundiiS. aureus6. Dental plaque contains all of the following, exceptMicroorganismsMucinExudateDesquamated epithelial cells7. Which inorganic constituent is present in highest concentration in dental plaque?PhosphorusCalciumIronFluorine8. Which product of the streptococci is responsible for adherence of the dental plaque to the smooth surfaces of teeth?GlucanGlycoproteinGlycosaminoglycanProteoglycan9. Which is the principal buffering ion present in saliva?BismuthBicarbonatePhosphorusFluoride10. Which amongst the following factors does not contribute to wards greater caries resistance of the surface enamel of a tooth?Fluoride contentSlower dissolution in acidsLesser water contentLesser mineral content11. The tooth that is most susceptible to dental caries isMandibular 1st molarsMandibular 2nd molarsMaxillary caninesMaxillary 2nd premolars12. State which amongst the below given factors is not an antibacterial factor present in saliva.LysozymeLysosomeLactoferrinSIGA13. The factor that is least associated with increased incidence of dental caries isCarbohydrate rich dietMalposed toothSmokingQuantity of saliva14. Undermining of enamel occurs due toLateral spread of caries midway between enamel and dentinLateral spread of caries at the dentinoenamel junctionLateral spread of caries midway between dentin and pulpSpread of caries along dentinal tubules15. The least likely location for occurrence of smooth surface caries is:Labial surface of maxillary incisorsProximal surfaces of all teethGingival 1/3rd of buccal surfaces of teethGingival 1/3rd of lingual surfaces of teeth16. Which theory of dental caries proposes that organic elements in teeth are the initial pathway of invasion of microorganisms?Sucrose chelationProteolyticAutoimmuneChemicoparasitic17. A caries increment of __ or more new carious lesions over one year is considered characteristic of rampant caries85101518. Acute dental caries occurs most frequently in children and young adults becauseDentinal tubules are scleroses in the teeth of young peopleThe apex of root of teeth are not formed completelyDentinal tubules are narrower in diameterDentinal tubules are larger, open and show no sclerosis19. Nursing bottle caries is a type of _______ cariesAcuteRecurrentRampantArrested20. Absence of caries in _______ teeth helps to distinguish nursing bottle caries from rampant cariesMaxillary caninesMandibular incisorsMaxillary incisorsMandibular canines21. Which type of caries is most likely to show considerable surface destruction, shallow cavity, little undermining of enamel and little or no pain?ChronicAcuteRampantRecurrent22. The first change to occur in caries of enamel isLoss of rod enamelLoss of inter rod enamelLoss of rod sheathIncreased prominence of enamel rods23. Which surface of a tooth has maximum susceptibility for occurrence of dental caries?OcclusalLingualMesialDistal24. In enamel caries, the advancing front of the lesion is calledBody of lesionDark zoneSurface zoneTranslucent zone25. Of all the zones in enamel caries which zone is not always present?TranslucentDarkBodySurface26. What is the earliest histological evidence of dentinal caries?Transparent dentinFatty degeneration of odontoblastic processesLateral spread of caries along dentino-enamel junctionMiller’s liquefaction foci27. The most accepted theory on mechanism of action of ingested fluoride isAbsorption of fluoride ions on hydroxyapatite crystallitesPrevention of carbohydrate degradationInhibition of microorganismsIncorporation of fluoride in crystal structure of enamel28. What is the percentage of fluoride in acidulated phosphate fluoride (APF) gels?2.34 percent1.23 percent3.45 percent1.24 percent29. The most commonly employed fluoride in dentifrices isSodium monofluorophosphateStannousfluorideAcidulated phosphate fluorideSodium fluoride30. The mechanism of cariostatic action of chlorhexidine isAbsorption into enamel crystalsAbsorption into enamel crystals and salivary mucinsInhibition of microorganismsInhibition of carbohydrate degradation3 out of 2 Time is Up!Time is Up!