The microhardness of dentin is about____________?

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. 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

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. 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

5. The percentage of inorganic matter in fully developed enamel is about____________?

   A. 66%
   B. 76%
   C. 86%
   D. 96%

6. At the CEJ cementum overlaps enamel about____________?

   A. 55 to 60%
   B. 60 to 65%
   C. 65 to 70%
   D. 70 to 75%

7. The zone of dentin most recently formed and uncalcified is known as____________?

   A. Mantle dentin
   B. Circumpulpal dentin
   C. Predentin
   D. Secondary dentin

8. Dentin formed through out the life is______________?

   A. Sclerotic dentin
   B. Secondary dentin
   C. Reparative dentin
   D. All of the above

9. Transmission of stimulus across dentin is______________?

   A. Direct activation of nerve endings
   B. Correlated with the innervation density of the dentin
   C. Stimulus induced fluid flow
   D. There is no transmission of stimulus across dentin

10. The type of dentin that is formed prior to root completion______________?

    A. Inter tubular dentin
    B. Peritubular dentin
    C. Circum pulpal dentin
    D. Secondary dentin