First permanent molars begin to calcify at ______________?
(A) 6 months of intra utrerine life
(B) At birth
(C) Before decidous incisors
(D) About 1 year after birth
In anxious parent calls you that her 5- month -old child has still no teeth in his mouth then you should_____________?
(A) Call and do radiographic survey
(B) Tell her that it is normal at this age
(C) Child has retarded growth
(D) Systemic problem
The eruption are of maxillary permanent lateral incisor is_____________?
(A) 8-9 years
(B) 6-7 years
(C) 10-11 years
(D) 8-9 months
Calcification of roots of decidous teeth is completed by_____________?
(A) 2 years
(B) 4 years
(C) 6 years
(D) 8 years
The decidous canine emerges______________?
(A) Before lateral incisor
(B) Before first molar
(C) After first molar
(D) After second molar
The most common sequence of eruption of the permanent maxillary teeth in children is_______________?
(A) 1-6-2-3-4-7-5-8
(B) 2-3-1-6-7-5-4-8
(C) 6-1-2-4-3-5-7-8
(D) 6-1-2-3-4-5-7-8
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
First evidence of initiation of primary dentition is usually around_____________?
(A) 4 months in utere
(B) Birth
(C) 4 months after birth
(D) One year after birth
Which of the following is dental formula of a 9 years old child_____________?
(A) 6 EDC21/ 6EDC21
(B) 6EDCBA/ 6EDC21
(C) EDC21/EDC21
(D) 76EDC21/ 7EDC21