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

Related Mcqs:

1. 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

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. 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

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. The cementuoenamel junction is approximately at the level at which the root canal becomes_____________?

   A. Twisted
   B. Curved
   C. Pulp chamber
   D. Lateral canal

7. Which of the following is correct about enamel crystals ?

   A. Same as dentin crystals
   B. Contains organic portion in the center
   C. Roughly texagonal in shape
   D. Their diameter is about 5 microns in size

8. Which of the following is located meidal to the third molar at the junction of the maxilla and the horizontal plate of the palatine bone_____________?

   A. Posterior nasal spine
   B. Mylohyoid line
   C. Pterygoid Hamulus
   D. Greater palatine foramen

9. At the CEJ cementum overlaps enamel about____________?

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

10. The dentin adjacent to the dentinoenamel junction is called the______________?

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