Böhler angle

Last revised by Dr Henry Knipe on 24 Apr 2021

Böhler angle, also written as Bohler angle or Boehler angle, is also called the calcaneal angle or tuber joint angle 1.

Measurement

Böhler angle is the angle between two lines tangent to the calcaneus on the lateral radiograph. These lines are drawn tangent to the anterior and posterior aspects of the superior calcaneus.

Interpretation

The "normal" value for this angle is between 20° to 40°. A value <20° can be seen in calcaneal fractures. However, a mildly decreased Böhler angle may be seen in a normal individual 5 and a normal Böhler angle does not exclude a calcaneal fracture.

History and etymology

Lorenz Böhler (1885-1973) was an Austrian surgeon, regarded as the founder of traumatology 4.

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Cases and figures

  • Case 1: normal Böhler angle
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  • Case 2: reduced Böhler angle in calcaneal fracture
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  • Case 3: reduced Böhler angle
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  • Case 4: Böhler angle reduced to 2.5 degreees
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  • Case 5: reduced Böhler angle
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