Fig. 2

Fracture reduction criteria measured on post-operative X-ray 3 months after ankle surgery. 2a Medial step-off in mortise view. 2b Posterior step-off: only included if more than 20% of the articulating surface was affected in lateral view. 2c Tibiotalar tilt: measured in mortise view as the angle between the tibial plafond and the talar joint line. 2d Tibiofibular overlap: defined as the distance between the medial edge of the fibula and incisura fibularis and measured 10 mm proximal to the tibial plafond in mortise view. 2e Oblique medial clear space: measured between the inferior-medial corner of the tibial plafond and the superior-medial corner of the talus in mortise view. 2f Dime sign: fibula is shortened and reported as “positive” dime sign if the “ball” is broken in mortise view. 2g Lag screw surpassing the bone cortex (bicortical): the distance was measured perpendicular to the cortical line. 2h Distal fibular screws: defined as “positive” if any of the 3 distal screws was bicortical in any projection. 2i Proximal fibular screws: the distance was measured perpendicular to the cortical line of the most penetrating screw in any projection. All measurements were reported in mm or positive/negative