Moderate
True about direction of enamel rods______________?
Correct answer: E. All of the above
- 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
- E. All of the above
Explanation
Enamel rods generally begin approximately perpendicular to the dentin surface, become nearly vertical near cusps and incisal edges, and show the listed cervical deviations in deciduous and permanent teeth. Thus all the described directions are correct.
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