Fig 6.

Final stage of tunnel filling. (A) Placement of bone chips as a roof in the proximal end of the tibial tunnel is shown, with the insertion of demineralized bone matrix (DBM) inside it. The proximal end of the tunnel is closed with bone chips (I), and a curette (II) is introduced through the anterolateral portal to prevent the DBM paste from entering the joint. DBM (III) is then inserted from proximal to distal with a technique similar to that used in the femoral tunnel. It is of utmost importance to fill all the gaps and to achieve a good press fit. (B) Intraoperative arthroscopic vision from the anteromedial portal shows the curette introduced from the anterolateral portal to prevent passage of chips into the joint.