Fig. 2

Locate the anatomic reconstruction point of bone tunnel. a: The anatomic reconstruction point of the fibular bone tunnel (5 mm lateral away from FOT) under arthroscopic visualization; b:The anatomic reconstruction point of the talar bone tunnel (the center of the ATFL talar footprint area) under arthroscopic visualization; c: The anatomic reconstruction point of the calcaneal bone tunnel; d: Fluoroscopic evaluation with lateral view of ankle before the tunnel drilling: the anatomic reconstruction point of the fibular bone tunnel locatedat 10 mm upper of the tip of distal fibula (blue point); Draw a line from the inferolateral (IL, white point) corner to the anterolateral (AL, white point) corner of the tall body, divide this line into three equal parts, and the entrance of the talar guide wire (blue point) should be located in the area above the middle part (corresponding to TOT); The entrance of the calcaneal guide wire should be located approximately 17 mm away from the vertical line at the midpoint of the posterior calcaneus articular surface