Fig 7.

Fibular tunnel drilling. A left knee is viewed from the left side. The starting point for the drill pin is at the fibular collateral ligament insertion on the anterolateral aspect of the fibular styloid, about 28 mm distal to the tip. The direction is posterior-superior-medial to reach the fibular insertion of the popliteofibular ligament. When the drill is directed 50° externally rotated from the midline and 60° cephalad with respect to the joint line, the tunnel created is anatomic and is in the best available bone. Tunnel drilling is performed with a 6-mm reamer because of the limited space available and for fracture prevention.