Oral Histology

24. True about direction of enamel rods______________?

A. They originate at right angle to dentin surface
B. They are almost vertical near the incisal edge (or) cusp tip areas
C. In the cervical third of deciduous crowns they are almost horizontal in direction
D. In cervical region of permanent teeth, they deviate in apical direction
✅ The correct answer is option E. All of the above.

26. Aging process affects pulp tissue by_____________?

A. Decreasing the size and shape of pulp tissue and cellular component
B. Increase cellular component at the expenses of fibre component
C. Increases vascularity of the pulp
D. Decrease the calcific component of the pulp
✅ The correct answer is option A. Decreasing the size and shape of pulp tissue and cellular component.

27. Enamel tufts are_______________?

A. Thin tuft like structure extending from enamel surface of dentin enamel junction
B. Tuft like structure arising from dentin-enamel junction towards enamel surface
C. Odontoblastic processes extending into enamel
D. None of the above
✅ The correct answer is option B. Tuft like structure arising from dentin-enamel junction towards enamel surface.

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