Fig. 3

a Inside-out drilling: Positioning of the target drill wire with suitable target instrument through the anteromedial portal. Over drilling with cannulated drill. Drill diameter is the same as the transplant diameter. b Positioning of the impactor: Positioning of the cannulated impactor of the same diameter 10 m deep in the femoral channel. Stab incision via the femorally drilled target drill. c Outside-in drilling: Drilling using a cannulated drill via the target drill wire until the impactor is reached. d Impacting the drill channel: Impacting a stage impactor from outside via the drill hole wire until the top of the stage impactor is visible in the joint. The impactor positioned in the drill channel is knocked back in this process. e Drawing the transplant into the femoral channel from proximally to distally until the T-Lock Osteotrans tendon anchor is pressed in close to the joint. f Conditioning of the transplant by moving the knee many times from maximum extension to flexion with vigorous distal traction