Category: Enamel

A. 4 μ m
B. 9 μ m
C. 7 μ m
D. 2 μ m

A. Hyperplasia
B. Hypoplacification
C. Normal development
D. Interstitial development

A. 35%
B. 50%
C. 4%
D. 96%

A. Permeable membrane
B. Impermeable membrane
C. Semipermeable membrane
D. Infrapermeable membrane

A. Greater than the thickness of enamel
B. Less than the thickness of enamel
C. Equal to the thickness of enimal
D. None of the above

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

A. Neonantal bands
B. Cross striations
C. Striae of Retzius
D. Hunter-Schregar bands

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 matrix
B. Root
C. CEJ
D. DEJ

A. 10mm
B. 5mm
C. 2mm
D. 0.5mm