The thickness of prismless enamel in diciduous teeth is______________?
A. 25 μ m
B. 50 μ m
C. 75 μ m
D. 100 μ m
Enamel rods at the cervical area at the occlusal edge and incisal lip in permanent teeth are______________?
Enamel rods at the cervical area at the occlusal edge and incisal lip in permanent teeth are______________?
A. Straight
B. Shallow
C. Bent
D. Curved
Incremental lines of Retzius appear_____________?
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
Enamel spindles are formed by______________?
Enamel sdles are formed by______________?
A. Cracks
B. Ameloblasts
C. Odontoblasts
D. Hypocalcified rods
The small ridges, perikymata, seen on facial surfaces of canines are the result of_____________?
The small ridges, perikymata, seen on facial surfaces of canines are the result of_____________?
A. Hyperplasia
B. Hypoplacification
C. Normal development
D. Interstitial development
Ameloblasts is______________?
Ameloblasts is______________?
A. A cell from which tooth enamel is formed:
B. A tissue from which tooth erupts
C. A tumour of the jaw
D. Pertaining to dentin
Shape of enamel rod is______________?
Shape of enamel rod is______________?
A. Key hole or paddle shaped
B. Square
C. Round
D. None of the above
Moth eaten appearance of of enamel is seen in____________?
Moth eaten appearance of of enamel is seen in____________?
A. Odontodysplasia
B. Amelogenisis stage
C. Desmolytic stage
D. Mottled enamel
Hertwig’s root sheath is formed from______________?
Hertwig’s root sheath is formed from______________?
A. Stratum inter medium
B. Stellate reticulum
C. Outer enamel epithelium
D. Cervical loop
Thin leaf like structures that extend from enamel surface in to DEJ are____________?
Thin leaf like structures that extend from enamel surface in to DEJ are____________?
A. Enamel sdles
B. Enamel lamella
C. Enamel tufts
D. Perikymata