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.Management Sciences
Category: Enamel
Approximately how many enamel rods will be present in a maxillary molar ?
A. 5 million
B. 7 million
C. 9 million
D. 12 million
The formative cells of which of the following dental tissues disappear once tissue is formed___________?
A. Enamel
B. Dentin
C. Periodontal ligament
D. Cementum
Ionic exchange between enamel surface and environment______________?
A. Does not take place once enamel surface and invironment
B. Stops after 2 years of eruption
C. Continues till adult life
D. Continues through out life
Metalloprotienases are used in which stage of the amelogenesis_____________?
A. Organising
B. Formative/ Secretory
C. Protective
D. Desmolytic
The shallow furrows on the enamel surface, where stria of Retzius end are known as _______________ ?
A. Cracks
B. Pellicle
C. perikymata
D. Enamel lamellae
The class of low molecular weight calcium binding proteins seen predominantly in developing enamel are_____________?
A. Enamelin
B. Amelogenin
C. Tuftelin
D. Ameloplakin
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
Enamel spindles are formed by______________?
A. Cracks
B. Ameloblasts
C. Odontoblasts
D. Hypocalcified rods
Neonatal lines are found in all of the following except____________?
A. Enamel of primary incisors
B. Enamel of permanent canines
C. Enamel and dentin of permanent first molars
D. Dentin of permanent mandibular incisors
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