Baumann angle, also known as the humeral-capitellar angle, is used for the evaluation of the displacement of pediatric supracondylar humeral fractures. It is measured on a frontal radiograph, with elbow in extension.
This angle is formed by the humeral axis and a straight line through the epiphyseal plate of the capitulum.
A value between 64 - 81º is considered normal1. But due to significant variation between individuals, Baumann’s angle is better evaluated by comparison to the contralateral side. A difference of more than 5° between the two sides is considered abnormal.
An increased Bauman's angle will occur with residual varus and internal rotation deformities.
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