True about direction of enamel rods______________?

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

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

3. 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

4. The direction of enamel rods in decidous teeth is_____________?

   A. Same as permanent teeth
   B. Inclined in an apical direction in the cervical third of crown
   C. Inclined in an occlusal direction in the cervical third of crown
   D. None of the above

5. All are true regarding the enamel spindles except____________?

   A. Produced by ameloblasts
   B. Found in the region of cusps
   C. Surrounded by inter prismatic enamel
   D. Terminate as rounded process

6. Specific gravity of enamel is_____________?

   A. 2.8
   B. 3.8
   C. 4.8
   D. 2.3

7. The thickness of prismless enamel in diciduous teeth is______________?

   A. 25 μ m
   B. 50 μ m
   C. 75 μ m
   D. 100 μ m

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

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

9. Dentino enamel junction is_________________?

   A. Non-scalloped
   B. Straight
   C. Scalloped and the convexities are directed towards dentin
   D. Scalloped and the convexities are directed towards enamel

10. The average width of enamel rods is______________?

    A. 10mm
    B. 5mm
    C. 2mm
    D. 0.5mm