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

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. 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

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

   A. 5 million
   B. 7 million
   C. 9 million
   D. 12 million

4. 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

5. 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

6. 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

7. The average width of enamel rods is______________?

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

8. The direction of enamel rods in decidous teeth is_____________?

   A. Same as permanent teeth
   B. Inclined in an apical direction in the cervical third of crown
   C. Inclined in an occlusal direction in the cervical third of crown
   D. None of the above

9. Temporary structures in enamel organ are (before enamel formation) ?

   A. Enamel knot
   B. Enamel cord
   C. Both A and B
   D. Enamel Cuticle

10. A patient’s urine with a particular protein appears normal, but on standing it becomes dark. The dark colour disappears on heating. The patent is suffering from______________?

    A. Osteoporosis
    B. Multiple myeloma
    C. Infectious mononcleosis
    D. T – cell tumour