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World J Clin Pediatr. Jun 9, 2026; 15(2): 113603
Published online Jun 9, 2026. doi: 10.5409/wjcp.v15.i2.113603
Table 1 Ossification occurs in a typically predictable order (Mnemonic: CRITOE: 1, 5, 7, 10, 10, 11)
Ossification centers
Average age that ossification occurs
Capitellum1 year (ossifies first)
Radial head5 years
Internal (medial) epicondyle7 years-always ossifies before the trochlea
Trochlea10 years
Olecranon10 years
External (lateral) epicondyle11 years (ossifies last)


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