Fig 9.

Transoperative fluoroscopic lateral (A) and anteroposterior (B) views of a left knee in a setting of multiligament injury, showing the correct placement of the posterior cruciate ligament tibial guide pin. In the lateral view, the guide pin must be 5.5 mm proximal to the champagne-glass drop-off on the posterior aspect of the tibia. In the anteroposterior view, the correct position of the guide pin must be identified at the medial aspect of the lateral tibial eminence. Care must be taken to avoid pin extrusion and neurovascular damage to the posterior structures of the knee.