A. Morphogenic stage
B. Organizing stage
C. Desmolytic stage
D. Formative stage
A. Hypoplasia of local origin
B. Hypoplasia of systemic origin
C. Hypoplasia of hereditary origin
D. None of the above
A. Non-scalloped
B. Straight
C. Scalloped and the convexities are directed towards dentin
D. Scalloped and the convexities are directed towards enamel
A. They originate at right angle to dentin surface
B. They are almost vertical near the incisal edge (or) cusp tip areas
C. In the cervical third of deciduous crowns they are almost horizontal in direction
D. In cervical region of permanent teeth, they deviate in apical direction
E. All of the above
A. 4 μ m
B. 9 μ m
C. 7 μ m
D. 2 μ m
A. 35%
B. 50%
C. 4%
D. 96%
A. Enamel matrix
B. Root
C. CEJ
D. DEJ
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
A. Enamel
B. Dentin
C. Periodontal ligament
D. Cementum
A. Key hole appearance in cross section
B. Paddle appearance in cross section
C. Lanullate appearance in cross-section
D. None of the above