Quantification Using Fluoroscopic RSA of Distal Tibiofibular Syndesmotic Motion in the Intact State and Following Simulation of High Ankle Sprain

The distal tibiofibular syndesmosis is the articulation that lies between the tibia and the fibula at the ankle. Four ligaments — the anterior, posterior, and transverse tibiofibular ligaments and the interosseous ligament — are responsible for maintaining the stability of this articulation. Injuries of the syndesmosis are relatively rare but are frequently misdiagnosed [1]. Anterior-posterior and mortise radiography are often used to assist with diagnosis; however, they are not always accurate in identifying syndesmotic injuries, with success rates of 48% for anterior-posterior views and 64% for mortise views [2].