Friday, January 4, 2008

42 - ossification centres - elbow

Knowledge of the order and ages of appearance of the ossification centers of the elbow is essential in differentiating fractures from normal ossification centers in the pediatric elbow. A simple mnemonic, CRITOE, can be used to remember the sequence of appearance.

Ossification centers - Approximate age of appearance

Capitellum - 1 year

Radial head - 5 years

Internal epicondyle (Medial epicondyle) - 7 years

Trochlea - 10 years

Olecranon - 10 years

External epicondyle (Lateral epicondyle) - 11 years

Note: Females tend to have an earlier appearance of ossification centers by 1-2 years.

ElbowOssificationCenters:

Diagram - The ossification centers of the elbow

Normal Elbow AP:

Radiograph demonstrating ossification centers

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