With respect to their permanent successors the sum of the mesidodistal diameters of the first and second decidous molar is generally ____________?

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

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

3. 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

4. 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

5. The highest ( longest ) and sharpest cusp on the decidous mandibular first molar is____________?

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

6. Eruption date of decidous maxillary 2nd molar is ______________?

   A. 20 months
   B. 18 months
   C. 24 months
   D. 28 months

7. Among the difference between teeth in the decidous and the permanent dentition is that_____________?

   A. Buccal surfaces of the permanent molars are flatter
   B. Cervical ridges are more pronounced in permanent molars
   C. Root trunks of decidous teeth are larger compared with their overall root lengths
   D. Crowns of decidous incisors are wider mesiodistally than their cervico incisal lengths

8. Which line angle area is most acute when a permanent maxillary second molar is viewed occlusally ?

   A. Mesiofacial
   B. Distofacial
   C. Mesiolingual
   D. Distolingual

9. A child has 12 permanent and 12 decidous teeth, what is his age____________?

   A. 8½ years
   B. 11½ years
   C. 4½ years
   D. 13½ years

10. The successors of deciduous teeth develops form_______________?

    A. Successional lamina
    B. Dental lamina
    C. Stellate reticulum
    D. Neutral ectodermal cells