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

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. The bud, cap and bell stage of the developing tooth are based, on growth of the______________?

   A. Stellate reticulum
   B. Dental papilla
   C. Enamel organ
   D. Dental sac

3. Ectodermal cells in tooth bud are responsible for_______________?

   A. Determination of shape of crown and root
   B. Formation of periodontal ligament
   C. Formation of cementum
   D. Formation of pulp

4. 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

5. 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

6. 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

7. When a molar has no opposing tooth, it can become_______________?

   A. Extruded
   B. Intruded
   C. Protruded
   D. Retruded

8. The sharpest cusp of primary first molar tooth is____________?

   A. Mesiobuccal
   B. Distobuccal
   C. Mesiolingual
   D. Distolingual

9. The last primary tooth to be replaced by a permanent tooth is usually the_____________?

   A. Maxillary second molar
   B. Mandibular second molar
   C. Maxillary canine
   D. Mandibular canine

10. A new tooth is erupting in the mouth of a one and a half year old child. This tooth is most likely to be a decidous___________?

    A. Maxillary central incisor
    B. Mandibular lateral incisor
    C. Maxillary lateral incisor
    D. Maxillary canine