Most demineralised zone in enamel caries:____________?

Related Mcqs:

1. Smooth surface caries is characterized by spread of caries in enamel and dentin as cones. These alignment in enamel and dentin is____________?

   A. Base to base
   B. Apex to base
   C. Apex to apex
   D. None of the above

2. Progression of dental caries caries on pit and fissure occurs from:

   A. Apex of the pit and fissure
   B. Wide and of the pit and fissure
   C. Lateral surface of the pit and fissure
   D. Bottom of the pit and fissure

3. The caries of enamel surface leads to accentuation of:__________?

   A. Incremental lines of retzius
   B. Perikymata
   C. Imbrication lines of pickerill
   D. Wickham’s striae

4. Ratio of diameter of enamel rods in the DEJ to the enamel surface is______________?

   A. 1:4
   B. 1:1
   C. 1:2
   D. 2:1

5. Temporary structures in enamel organ are (before enamel formation) ?

   A. Enamel knot
   B. Enamel cord
   C. Both A and B
   D. Enamel Cuticle

6. An asymptomatic tooth has deep has deep caries on occlusal surface. Radiograph shows radiopaque mass at apex of the tooth: this mass is most likely to be:____________?

   A. Cementoma
   B. Condensing Osteitis
   C. Chronic apical periodontitis
   D. Acute apical periodontitis

7. Which zone is the hottest and efficient burning zone of the flame used for casting ?

   A. Oxidizing zone
   B. Reducing zone
   C. Combustion zone
   D. None of the above

8. True about caries, all except:

   A. Infectious and transmissible
   B. Not due to microorganisms
   C. Can develop in the absence of sucrose
   D. Microorganisms play the most essential role

9. The number of dentinal zones in dentinal caries is_____________?

   A. One
   B. Two
   C. Four
   D. Five

10. Chemico-parasitic theory of dental caries is proposed by______________?

    A. Miller
    B. G.V black
    C. Gottlieb
    D. Schwartz