A six- year molar begins to calcify at______________?

Related Mcqs:

1. While charting the dentition of a child, the pedodontist finds that the following teeth are present in all the four quadrants; permanent central incisor , permanent lateral incisor , decidous cuspid , decidous first molar, decidous 2nd molar and permanent 1st molar. The eruptive pattern may be considered most nearly normal for a child aged_____________?

   A. 3-6 years
   B. 7-10 years
   C. 11-14 years
   D. 15- 18 years

2. 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

3. 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

4. Calcification of third molar begins at__________________?

   A. 8 months
   B. 18 months
   C. 8 years
   D. 16 years

5. The primary lateral incisors begin to calcify about the_____________?

   A. 4th month of life
   B. 4th month in utero
   C. 41/2 month in utero
   D. 5th month in utero

6. The permanent mandibular second molar differs from the permanent mandibular first molar in number of ______________?

   A. Cusps
   B. Roots
   C. Lingual grooves
   D. Marginal ridges

7. In normal occlusion , with which grooves / surface of the permanent mandibular first molar does the mesiobuccal cusp of the permanent maxillary first molar occlude______________?

   A. Distobuccal groove
   B. Mesial surface
   C. Mesiobuccal surface
   D. Transverse groove

8. If a permanent first molar is lost, the permanent second molar drifts to the______________?

   A. Buccal side
   B. Distal side
   C. Mesial side
   D. Lingual side

9. 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

10. The maxillary air sinus opens into middle meatus at______________?

    A. Infundibulum
    B. Summit of infundibulum
    C. Bulla ethmoidalis
    D. Hiatus semilunaris