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.Management Sciences
Category: Oral Anatomy
Roots of primary and secondary teeth are different in that the primary roots are more divergent and flaring. The other difference _____________?
A. Primary roots show less a accessory and lateral canals
B. Primary roots resorb more easily
C. Primary roots are shorter
D. None of the above
Permanent Mandibular central incisor develops from_____________?
A. 1 lobe
B. 3 lobes
C. 4 lobes
D. 5 lobes
Distobuccal cusp of 27 falls into ______________?
A. Embrasure of 37 & 38
B. Embrasure of 36 & 37
C. Mesial pit of 37
D. Immediately incisal to cingulam
Dentition of humans is_______________?
A. Herbivorous
B. Omnivorous
C. Carnivorous
D. None of the above
A six- year molar begins to calcify at______________?
A. Six months IU
B. At birth
C. 1 years after birth
D. 3 years age
What is the thickness of the layer of primsless enamel found in primary teeth_____________?
A. 25 μm
B. 50μm
C. 75μm
D. 100μm
Maxillary primary cuspid enamel completion takes place at______________?
A. 6 months in utero
B. 6 months after birth
C. 9 months in utero
D. 9 months after birth
Beginning of eruption of permanent tooth starts_____________?
A. After completion of root
B. When apical third root is still to be formed
C. When half of the root is still to be formed
D. when root formation starts
A radiograph of 4- years old child reveals no evidence of calcification of mandibular second pre molar. This indicates______________?
A. It is too early to make final predication
B. The teeth may develop later
C. Primary second molar extracted to allow mesial drifting of permanent first molar
D. The child may never develop premolars
Calcification of permanent first molar usually begins in the_____________?
A. Third month of intrauterine life
B. In the sixth month of intrauterine life
C. At birth
D. In the third month of extra uterine life
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