According to Schour & Massler the crown completion of both permanent maxillary and mandibular first molars is________________?

Related Mcqs:

1. 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

2. 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

3. Crown formation of all permanent teeth except third molars is completed between_____________?

   A. Birth to 8 years
   B. Birth to 12 years
   C. Birth to 6 years
   D. 6 years to 12 years

4. The Sensitive period for tetracycline induced discolouration in the permanent maxillary mandibular incisors and canines is________________?

   A. 3 months postpartum to 7th year of life
   B. 4 months in utero to 3 months postpartum
   C. 5 months in utero to 9 months postpartum
   D. Birth to 7th year

5. Difference between mandibular and maxillary premolars is that in the mandibular premolars ?

   A. The buccal and lingual cusps are more prominent
   B. The lingual cusp is sharper and longer
   C. The lingual surface rounded and less developed
   D. The buccal surface is rounded and less developed

6. Which of the following features of a permanent maxillary lateral incisor aids in distinguishing it from a mandibular lateral incisor ?

   A. Flattened root
   B. More pronounced lingual fossa
   C. Thinner incisal ridge
   D. Sharper proximal incisal angles

7. The most constant and valuable trait to differentiate among maxillary first, second and third molars i____________?

   A. Number of roots
   B. Depth of central fossae
   C. Comparative size of the cusp of carabelli
   D. Relative position of the distolingual grooves

8. The eruption age of maxillary permanent lateral incisor is________________?

   A. 8-9 years
   B. 6-7 years
   C. 10-11 years
   D. 8-9 months

9. Growth of all permanent teeth except last molars is completed by___________?

   A. 6 years
   B. 8 years
   C. 12 years
   D. 17 years

10. 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