• INTRODUCTION
    • Treatment of supination external rotation type IV (SER-IV) ankle injuries has focused on reduction and fixation of the fibula and syndesmosis (ORIF), not repair of the deltoid ligament.
  • METHODS
    • Twenty-one ankles were analyzed with a motion capture system. Uninjured ankles were stressed and compared to ankles with SER-IV injuries, then with ORIF, and finally ORIF and deltoid repair.
  • RESULTS
    • After deltoid ligament repair, talar coronal and axial rotation normalized to the uninjured state and were significantly reduced compared to ORIF alone.
  • DISCUSSION
    • Deltoid ligament repair after an SER-IV ankle injury can help directly reduce and stabilize the tibiotalar joint.