Fig 4.

Initial stage of tunnel filling. The placement of a bone chip plug (I) at the proximal end of the femoral tunnel is illustrated. Arthroscopy fluid is drained from the joint before applying the bone graft to avoid possible migration. Both ends of the tunnels are clogged using bone chips. It is of utmost importance to obtain good closure of the tunnel. To introduce the bone chips, a cannula (II) is used through the anteromedial portal (III), and the knee is flexed on demand to facilitate access to the tunnel.