A femoral intramedullary nail is a metal rod which is inserted into the femoral canal to stabilize fractures of the long bone. The retrograde femoral nail is a type of intramedullary nail which is inserted at the distal end of the long bone and is typically used for distal femur fractures. While the success rates are high, some complications still exist, including failure of the nail through the screw holes, failure or loosening of screws, and bone fracture [1]. There are many design variables that affect clinical performance including the implant material, nail and screw diameters, the number of screws, and the nail and screw position and orientation. To help determine the most suitable design for a given fracture the effect of the above variables on the stresses and displacements in the nail, screws, and bone may be important to consider.

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