The optimal surgical treatment of patients with an unstable extracapsular proximal femoral fracture is yet to be found. From the biomechanical point of view, the use of an intramedullary device in combination with a dynamic femoral head/neck stabilization implant seems an optimal technique. One of these intramedullary devices, the Proximal Femoral Nail (PFN), has several drawbacks in practice. The Proximal Femur Nail Antirotation (PFNA) has been designed to address these