Approximately how many enamel rods will be present in a maxillary molar ?

Related Mcqs:

1. Ratio of diameter of enamel rods in the DEJ to the enamel surface is______________?

   A. 1:4
   B. 1:1
   C. 1:2
   D. 2:1

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. Dark bonds that are present in enamel rods at intervals of 4 μms are______________?

   A. Neonantal bands
   B. Cross striations
   C. Striae of Retzius
   D. Hunter-Schregar bands

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. Interwining of the enamel rods at the cusp timps and the incisal edges of a tooth is called______________?

   A. Enamel spindles
   B. Gnarled enamel
   C. Incremental lies of woven
   D. Incremental lines of retzius

6. Length of enamel rods is_____________?

   A. Greater than the thickness of enamel
   B. Less than the thickness of enamel
   C. Equal to the thickness of enimal
   D. None of the above

7. Enamel rods at the cervical area at the occlusal edge and incisal lip in permanent teeth are______________?

   A. Straight
   B. Shallow
   C. Bent
   D. Curved

8. On microscopic examination enamel rods have___________?

   A. Key hole appearance in cross section
   B. Paddle appearance in cross section
   C. Lanullate appearance in cross-section
   D. None of the above

9. The average width of enamel rods is______________?

   A. 10mm
   B. 5mm
   C. 2mm
   D. 0.5mm

10. Cusp of carbelli is present on ________ surface of the permanent maxillary molar ?

    A. Mesial surface
    B. Palatal surface
    C. Buccal surface
    D. Mesial half of the palatal surface