ONAS-DPS: a retrograde femoral IM nail and unilateral frame are shown on the bone model. Two Schanz screws are fixed proximally and distally (Figures 2 and 3) into the plate. Note that the screws are not entering the underlying cortical bone and in this way the contact with IM nail is avoided. A wedge subplate is used distally. In the case of anterograde IM femoral nail (not shown) the “wedge plate” is used proximally. The most distal screw goes through the IM nail in order to provide adequate stability of the whole system.