There are two normal children of the same age and sex. In one, all the permanent teeth except the third molars have erupted.In the other,no permanent canines or premolars have erupted. How old are these children ?

Related Mcqs:

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...

First evidence of calcification of maxillary permanent central incisors occurs at_____________?

A. 3-4 months B. 10-12 months C. 2-3 years D. 3-4 years...

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...

Generally in majority of children, the sequence of eruption of permanent teeth in mandible is____________?

A. 1-6-2-3-5-4-7-8 B. 6-1-2-4-5-3-7-8 C. 6-1-2-3-4-5-7-8 D. 6-1-2-4-3-5-7-8...