Normal growth plate.
A-C. Wrist radiographs of 3 different children, aged 1 month
(A), 17 months (B), and 13 years (C). The zone of provisional calcification is a thin dense band that caps the metaphysis. This band is only faintly dense compared with the metaphysis in "A." It is thin and well defined in "C." The spongy bone in the metaphyses has a lacy character.