Review Question - QID 326

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Ankle Fractures Classification QID: 326 (OBQ06.140)

QID 326 (Type "326" in App Search)

The Lauge-Hansen classification of ankle fractures identifies characteristic fracture patterns based on mechanism of injury. What is the mechanism for the fracture pattern shown in Figure A?

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Supination-External Rotation

99/1518

Pronation-External Rotation

21/1518

Pronation-Abduction

41/1518

Supination-Adduction

87%

1319/1518

Supination-Abduction

27/1518

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The 4 categories in the Lauge-Hansen classification are: supination-adduction, supination-external rotation, pronation-external rotation, and pronation-abduction.

The typical fracture pattern of supination-adduction is demonstrated in figure A and consists of a tension failure (transverse) fracture of the lateral malleolus combined with a vertical fracture of the medial distal tibia. There is frequently comminution where the fracture begins on the tibial plafond. This is caused by compression from the medial talar dome.

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