Torsional strength of the ankle in vitro. The supination-external-rotation injury.

  title={Torsional strength of the ankle in vitro. The supination-external-rotation injury.},
  author={Keith L. Markolf and Thomas P. Schmalzried and Richard D. Ferkel},
  journal={Clinical orthopaedics and related research},
Nineteen fresh-frozen anatomic specimens of the ankle were mounted in an experimental test device with the foot in supination. Torque versus rotation curves were recorded as each foot was rotated externally to failure. The mean failure torque was 45.3 Nm, the mean rotation to failure was 41.4 degrees, and the mean energy absorbed to failure was 10.6 Nm. Twelve specimens failed by fracture of the fibula, five by failure of lateral ligaments with no fibular fracture, one by a subtalar dislocation… CONTINUE READING

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