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

Related Mcqs:

1. Marked reduction in amount of dentin, widening of predentin layer, presence of large area of interglobular dentin and irregular pattern of dentin is seen in______________?

   A. Hypocalcified dentin
   B. Odonto dysplasia
   C. Dentin dysplasia
   D. Dentinogenesis imperfecta

2. Organism involved in smooth surface caries is____________?

   1 Streptococcus mutans
   2 Actinomyces viscosus
   3 Lactobacillus
   4 Campylobacter

   A. only 1
   B. only 2
   C. 1 and 3
   D. All of the above

3. In adult teeth, the type of dentin present underlying dentin-enamel junction is_______________?

   A. Predentin
   B. Mantle dentin
   C. Interglobular dentin
   D. Tertiary dentin

4. Compared to the inter tubular dentin, peritubular dentin is characterized by which of the following ?

   A. Greater stainability
   B. Lasser content of inorganic salts
   C. greater content of inorganic salts
   D. Greater content of large collagen fibres

5. 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

6. 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

7. 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

8. Most demineralised zone in enamel caries:____________?

   A. Translucent zone
   B. Body of lession
   C. Dark zone
   D. Surface zone

9. The lateral spread of dental caries is facilitated mostly by the_______________?

   A. Enamel spindles
   B. Dentinoenamel junction
   C. Enamel lamellae
   D. Striae of Retzius

10. A girl suffering from browing of teeth, wearing of enamel but not cavitory, OPG shows obliteration of pulp with narrowing of canal & deposition of secondary dentin, she gave the history that out of her 4 brothers 2 are suffering from the same disease, She is suffering from_______________?

    A. melogenesis imperfecta
    B. Dentinogenesis imperfecta
    C. Flurosis
    D. Odontodysplasia