Figure 2.

Navigation views of left knee. (A) The surface of the lateral wall of the intercondylar notch is shown in an orthogonal projection on the navigation computer screen. (B) The 3D image was rotated 90° on the navigation screen, and the risk of a back-wall blowout could be evaluated. (C) The image was rotated 180° to show the lateral aspect of the distal femur. The virtual exit of the femoral tunnel on the monitor enabled the surgeon to avoid any communication between the primary and revision tunnel exits on the lateral cortex.