Physes are the growth plates of bones in children.

The physes usually close as the child reaches adulthood.
Synonyms:
growth plates
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FORUM DISCUSSIONS
Tibialis Allograft for Open Physis 15Y/O.
Looking for advice/feedback 14 year old, 2 dislocations; PLEASE HELP.
CLINICAL PUBLICATIONS
Differential aging of growth plate cartilage underlies differences in bone length and thus helps determine skeletal proportions. Lui JC, Jee YH, Garrison P, Iben JR, Yue S, Ad M, Nguyen Q, Kikani B, Wakabayashi Y and Baron J. PLoS Biol. 2018 Jul; 16(7): e2005263.