Dentino enamel junction is_________________?

Related Mcqs:

1. 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

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

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

3. At the cemento enamel junction, which of the following occurs_____________?

   A. Cementum meets enamel
   B. Cementum overlaps enamel
   C. Cementum does not meet enamel
   D. All of the above

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

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

5. 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

6. Enamel tufts are_______________?

   A. Thin tuft like structure extending from enamel surface of dentin enamel junction
   B. Tuft like structure arising from dentin-enamel junction towards enamel surface
   C. Odontoblastic processes extending into enamel
   D. None of the above

7. Thin leaf like structures that extend from enamel surface in to DEJ are____________?

   A. Enamel spindles
   B. Enamel lamella
   C. Enamel tufts
   D. Perikymata

8. The enamel has no capacity of self repair because______________?

   A. It has only a small percent of organic content
   B. Its formative cells are lost once it is completely formed
   C. It is essentially a keratin tissue and has no blood vessels
   D. It has no direct connection with the active cells of the dental pulp

9. The striking difference between enamel and other mineralized tissues is______________?

   A. Presence of high percentage of organic matrix
   B. Presence of incremental lines
   C. Enamel has high reparative capacity
   D. Most of organic component is lost during mineralization

10. Enamel can act in a sense like a_______________?

    A. Permeable membrane
    B. Impermeable membrane
    C. Semipermeable membrane
    D. Infrapermeable membrane