MCQs on Oral Histology - Enamel

# Perikymata are the external surface manifestations of :
A. Enamel rods
B. Incremental lines of Retzius
C. Nasmyth's membrane
D. Pellicle

# The percentage of inorganic matter in fully developed enamel is about:
A. 66 %
B. 76 %
C. 86 %
D. 96 %

# 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

# Hunter Schreger band are :
A. Dark and light bands of enamel seen in longitudinal ground section
B. Dark and light bands of enamel seen in horizontal ground section
C. Dark and light bands of dentin seen in longitudinal section
D. Dark and light bands of dentin seen in horizontal section

# Enamel tufts are :
A. Thin tuft like structure extending from enamel surface to 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

# Which of the following is not an external manifestation of enamel ?
A. Enamel tufts
B. Enamel lamella
C. Incremental lines of Retzius
D. Enamel cuticle

# 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

# Blunt cell processes seen on developing ameloblasts are called as:
A. Tomes Fibres
B. Tomes layer
C. Tomes processes
D. Odontoblastic processes

# Intertwining of the enamel rods at the cusp tips and the incisal edges of a tooth is called:
A. Enamel spindles
B. Gnarled Enamel
C. Incremental lines of Retzius
D. Incremental lines of Owen

# Incremental lines of Retzius are seen in:
A. Enamel
B. Dentin
C. Cementum
D. Pulp


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