Perikyma: Difference between revisions

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Perikymata (Greek plural of περικύμα, perikyma) are incremental growth lines that appear on the surface of tooth enamel as a series of linear grooves.^[1] In anatomically modern humans, each perikyma takes approximately 6–12 days to form. Thus, the count of perikymata may be used to assess how long a tooth crown took to form. They may disappear as the enamel wears over time after the tooth erupts.

Perikymata are the expression of striae of Retzius at the surface of enamel. They can be found on all teeth, but are usually the easiest to notice on anterior teeth (incisors and canines).

References

^ Hillson, Simon (1996). Dental Anthropology. Cambridge University Press. ISBN 1107078261.

[1] Hillson, Simon (1996). Dental Anthropology. Cambridge University Press. ISBN 1107078261.

[1]

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-{{Unreferenced|auto=yes|date=December 2009}}
+{{More citations needed|auto=yes|date=December 2009}}
-Microscopically, '''perikymata''' ([[Greek language|Greek]] plural of '''perikyma''') are the pits around the long prisms of [[tooth enamel]].  They indicate the places where enamel-producing cells used to make contact with neighboring cells and are the result of normal enamel apposition.
+'''Perikymata''' ([[Greek language|Greek]] plural of περικύμα, '''perikyma''') are incremental growth lines that appear on the surface of [[tooth enamel]] as a series of linear grooves.<ref>{{Cite book|title=Dental Anthropology|last=Hillson|first=Simon|publisher=Cambridge University Press|year=1996|isbn=1107078261}}</ref>  In anatomically modern humans, each perikyma takes approximately 6–12 days to form. Thus, the count of perikymata may be used to assess how long a tooth crown took to form.  They may disappear as the enamel wears over time after the tooth erupts.
+Perikymata are the expression of [[striae of Retzius]] at the surface of enamel.  They can be found on all teeth, but are usually the easiest to notice on anterior teeth (incisors and canines).
-Grossly, perikymata are incremental growth lines that appear on the surface of enamel as a series of grooves.  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.  They may disappear as the enamel wears over a period of time.
-They are thought to indicate the termination of [[striae of Retzius]] at the surface of enamel.  They can be found on all teeth,but are usually the easiest to notice on canines.
-[[File:M:\dental photography/perikyamata|frameless|center|Perikyamata on Upper central incisor along with mamelons]]
+== References ==
+{{reflist}}
 [[Category:Parts of tooth]]
-{{Dentistry-stub}}