Research of FNF Internal Fixation Operation Parametric Planning and Evaluation System

According to the results of the mechanical experiments and the CT images, the finite element model of the proximal femur was established. Using finite element method, postoperative biomechanical parameters can be comprehensive analyzed. The analysis can be grouped by the patient body weight, the angle of fracture line, the position and angle of cannulated screw, which may influence the result of the operation. In the 216 groups of the parameters, the relative displacement of the fracture position, the strain at the bottom of the screw hole, the max stress of the screw and the max strain of the proximal femur was used for planning and evaluation. After comparing and analyzing the displacement, strain and stress, the rational parameters of internal fixation for femoral neck fractures can be found. And optimal operation planning parameters can be found according to the theory of biomechanics.