Baumann angle

Baumann angle, also known as the humeral-capitellar angle, is used for the evaluation of the displacement of  paediatric 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. And 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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Article information

rID: 43365
Section: Radiography
Synonyms or Alternate Spellings:
  • Humeral-capitellar angle
  • Baumann's angle

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    Figure 1: Baumann angle
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