Abstract: Described herein are retrograde femoral nails and insertion systems suitable for stabilizing femoral fractures of the shaft and femur. After reaming the femoral canal, the intramedullary nail may be inserted with a retrograde approach through the knee. The nail includes four-start threaded holes in the distal region. The nail also includes oblique distal holes with a trajectory that targets the bone in the posterior condyles. The insertion instrumentation assembly and system includes an insertion handle with a retaining thread that prevents the connection bolt from falling out. An assembly shaft is also included, which assists the user in connecting the nail to the insertion handle. The system further includes an aiming guide with a retention mechanism that holds driver sleeves in place. The aiming guide also contains a hole to position a locking washer holder to interface with the nail.

Abstract: Described herein are retrograde femoral nails and insertion systems suitable for stabilizing femoral fractures of the shaft and femur. After reaming the femoral canal, the intramedullary nail may be inserted with a retrograde approach through the knee. The nail includes four-start threaded holes in the distal region. The nail also includes oblique distal holes with a trajectory that targets the bone in the posterior condyles. The insertion instrumentation assembly and system includes an insertion handle with a retaining thread that prevents the connection bolt from falling out. An assembly shaft is also included, which assists the user in connecting the nail to the insertion handle. The system further includes an aiming guide with a retention mechanism that holds driver sleeves in place. The aiming guide also contains a hole to position a locking washer holder to interface with the nail.