Radiographic evaluation in the study. The tibiofibular clear space (CS) was defined as the distance between the lateral border of the posterior tibial malleolus and the medial aspect of the fibula, measured 1 cm proximal to the tibial plafond. The medial clear space (MCS) was defined as the distance from the lateral border of the medial malleolus to the medial border of the talus at the level of the talar dome. The tibiofibular overlap (OL) was measured from the lateral border of the anterior tibial prominence to the medial fibula 1 cm proximal to the tibial plafond.