Fig. 3

Femoral-tunnel aperture center measured in posterior-to-anterior and proximal-to-distal directions using Bernard’s quadrant method. Distance “t” is defined the total sagittal diameter of the lateral femoral condyle measured along Blumensaat’s line. It was limited by the intersections between this line and the ventral and dorsal borders of the femoral condyle. Also, distance “h” is defined as the height of the intercondylar space measured as the distance between Blumensaat’s line and a tangent to the distal subchondral bone contour of the condyle parallel to Blumensaat’s line. Software (SolidWorks®, SolidWorks® Corp., Waltham, MA, USA) is used to create a femoral tunnel at the anatomical center of the ACL and 3-dimensional planes (coronal, transverse, axial)