Calcification of third molar begins at__________________?

Related Mcqs:

1. 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

2. 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

3. The first evidence of calcification of primary anterior teeth begins approximately between ______________?

   A. 14 to 17 weeks in utero
   B. 9 to 12 weeks in utero
   C. 6- to 9 weeks in utero
   D. 17 to 20 weeks in utero

4. 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

5. A six- year molar begins to calcify at______________?

   A. Six months IU
   B. At birth
   C. 1 years after birth
   D. 3 years age

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. The tooth bud for the third molar is initiated at about the age of______________?

   A. 6th month I.U
   B. 1st year of life
   C. 2nd year of life
   D. 8th year of life

10. Using occlusal morphology as guide , the Mandibular third molar is most similar to______________?

    A. Maxillary permanent first molar
    B. Mandibular permanent first molar
    C. Mandibular permanent second molar
    D. Mandibular decidous second molar