After the eruption of crown, reduced enamel is known as_____________?

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. A child has marked difference of crown, root size, eruption pattern of left & right side of jaw. The condition is______________?

   A. Crouzan syndrome
   B. Hemifacial hypertrophy
   C. Cherubism
   D. Achondroplasia

4. The anatomic crown is shorter than the clinical crown of a tooth in which of the following instances___________________?

   A. Impaction
   B. Gingivitis
   C. Occlusal wear
   D. Gingival recession

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 shallow furrows on the enamel surface, where stria of Retzius end are known as _______________ ?

   A. Cracks
   B. Pellicle
   C. perikymata
   D. Enamel lamellae

7. Epithelial cells which ultimately keratinize are known as_____________?

   A. Keratinizing cells
   B. Melanocytes
   C. Non-Keratinizing cells
   D. Clear cells

8. Tooth eruption is due to______________?

   A. Osteoclastic activity
   B. Proliferation of cells at crypt
   C. Exforliation of primary tooth
   D. Eruptive force

9. Gubernacular canal guides the eruption of_____________?

   A. Primary teeth
   B. Permanent teeth
   C. Both A and B
   D. None of the above

10. In considering the process of eruption, the pre-functional eruptive stage of a tooth begins when the_____________?

    A. Bud stage begins
    B. Cap stage begins
    C. Bell stage begins
    D. Dental lamina begins forming