perikymata are the external surface manifestations of_____________?
Correct answer: A. Incremental lines of retzius
- A. Incremental lines of retzius
- B. Enamel rods
- C. Nasmyth's membrane
- D. Pellicle
Explanation
Perikymata are shallow grooves and ridges visible on the external enamel surface where the incremental lines of Retzius reach the surface. Nasmyth’s membrane and pellicle are surface coverings, not the source of these markings.
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