Various surgical techniques exist to perform ACL reconstruction. In Exeter, the favoured technique is to reconstruct the ligament by taking two of the hamstring tendons from the back of the knee and creating a graft with these, passing them through a bony tunnel to replace the torn ACL. On the shin bone side of the knee the graft is fixed in place using a screw. On the thigh bone side, the graft is attached to a device known as a suspensory loop.