calcification in enamel starts at____________?

Related Mcqs:

1. The enamel of the posterior teeth is thickest at____________?

   A. Cervical third of buccal surface
   B. Middle third of buccal surface
   C. Middle third of lingual surface
   D. Occlusal surface

2. 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

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

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

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 disturbances occurred during Calcification stage of tooth development is seen in_____________?

   A. Peg laterals
   B. Microdontia
   C. Supernumerary tooth
   D. Interglobular dentin

6. The first macroscopic indication of morphologic development of primary incisors approximately at____________?

   A. 11 weeks in utero
   B. 14 weeks in utero
   C. 16 weeks in utero
   D. 6 weeks in utero

7. In TCA cycle substrate level phosphorylation occurs at____________?

   A. Succinate dehydrogenase
   B. Malonate reduction
   C. Thiokinase
   D. None of the above

8. Calcification of permanent first molar usually begins in the_____________?

   A. Third month of intrauterine life
   B. In the sixth month of intrauterine life
   C. At birth
   D. In the third month of extra uterine life

9. Dytrophic calcification are calcifications seen in__________________?

   A. Skin layers
   B. Salivary glands
   C. Normal tissues
   D. Dead tissue

10. Enzymes which play an important role in calcification are______________?

    A. Enolase & calcitonin
    B. Alkaline phosphatase & catalase
    C. Alkaline phosphatase & pyrophosphatase
    D. Pyrophosphatase & carbonic anhydrase