The shallow furrows on the enamel surface, where stria of Retzius end are 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. 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

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. Incremental lines of Retzius appear_____________?

   A. As lines in the enamel running at right angles to the enamel surface
   B. As lines in the dentin running at right angles to the dentino-enamel junction
   C. In enamel and follow the apposition pattern
   D. In dentin and follow the appositional pattern

5. Incremental lines of retzius are seen in______________?

   A. Enamel
   B. Dentin
   C. Cementum
   D. Pulp

6. All are true about the striae of retzius except___________?

   A. Constitute the rest lines with in the enamel rods
   B. Have high inorganic content
   C. They are areas of increased porosity
   D. Allow the movement of water and small ions

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. Ionic exchange between enamel surface and environment______________?

   A. Does not take place once enamel surface and invironment
   B. Stops after 2 years of eruption
   C. Continues till adult life
   D. Continues through out life

9. Non acidic, nonionic protein which helps in enamel mineralization _______________?

   A. Tuftelin
   B. Sheathlin
   C. Enamelin
   D. Amelogenin

10. A deep pit lined by enamel seen in the lingual surface of Maxillary lateral incipor is most likely to be_______________?

    A. Dens in dente
    B. Enamel Hypoplasia
    C. Talon’s cusp
    D. Enamel Pearl