A. Thin tuft like structure extending from enamel surface of dentin enamel junction
B. Tuft like structure arising from dentin-enamel junction towards enamel surface
C. Odontoblastic processes extending into enamel
D. None of the above
Related Mcqs:
- 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 - Temporary structures in enamel organ are (before enamel formation) ?
A. Enamel knot
B. Enamel cord
C. Both A and B
D. Enamel Cuticle - 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 - Interwining of the enamel rods at the cusp timps and the incisal edges of a tooth is called______________?
A. Enamel spindles
B. Gnarled enamel
C. Incremental lies of woven
D. Incremental lines of retzius - Thin leaf like structures that extend from enamel surface in to DEJ are____________?
A. Enamel spindles
B. Enamel lamella
C. Enamel tufts
D. Perikymata - Enamel spindles are formed by______________?
A. Cracks
B. Ameloblasts
C. Odontoblasts
D. Hypocalcified rods - The enamel has no capacity of self repair because______________?
A. It has only a small percent of organic content
B. Its formative cells are lost once it is completely formed
C. It is essentially a keratin tissue and has no blood vessels
D. It has no direct connection with the active cells of the dental pulp - calcification in enamel starts at____________?
A. Enamel matrix
B. Root
C. CEJ
D. DEJ - The striking difference between enamel and other mineralized tissues is______________?
A. Presence of high percentage of organic matrix
B. Presence of incremental lines
C. Enamel has high reparative capacity
D. Most of organic component is lost during mineralization - Enamel can act in a sense like a_______________?
A. Permeable membrane
B. Impermeable membrane
C. Semipermeable membrane
D. Infrapermeable membrane
