perikymata การใช้

Grossly, perikymata are incremental growth lines that appear on the surface of enamel as a series of grooves.
Perikymata which are associated with the Striae are shallow grooves noted clinically on the nonmasticatory surfaces of some teeth in the oral cavity.
The striae of Retzius often extends from the Dental-enamel junction to the outer surface, ending in shallow pits known as perikymata.
Each perikyma is thought to take approx . 8 10 days to form and thus the count of perikymata may be used to assess how long a tooth crown took to form.