Optimal Method of Internal Fixation for Femoral Neck Fracture
A technology for femoral neck fracture and fixation, which is applied in the directions of internal fixator, fixator, and internal bone synthesis to achieve the effect of shortening time, improving work efficiency and easy operation.
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Embodiment 1
[0051] A preferred method of femoral neck fracture internal fixation, the method may further comprise the steps:
[0052] (1) The acquisition method of the patient's femoral anatomical parameters: CT scanning is performed on the patient from the proximal end to the distal side perpendicular to the longitudinal axis of the femur from above the femoral head. The bottom is 3mm, from the bottom of the lesser trochanter to the middle of the femur is 10mm, a total of 42 layers were scanned, and the length is 17.9cm; from the CT images, the patient's fracture angle α, anteversion angle a, neck-shaft angle b, femoral shaft angle c, femoral head Diameter d, diameter of femoral shaft d1, diameter of femoral neck d2, dimension h of the joint between femoral head and femoral neck, arm of muscle contraction f, length of femoral neck l, circle radius r4 of inscribed femoral shaft and femoral neck, femoral head and femoral neck The parameter of the distance s of the fracture surface;
[005...
Embodiment 2
[0058] The optimal method for internal fixation of femoral neck fracture described in embodiment 1, the described adopting parameterized method to set up the three-dimensional geometry model of proximal end of femur: utilize ANSYS parametric design language APDL to carry out modeling, by writing the link between VC++ and APDL Communication code, transfer the parameters obtained from the first step to the APDL code of the parametric finite element model of the femur, and realize the modeling of the femur, including the establishment of the femoral neck model, the establishment of the femoral head model, and the transition between the femoral neck and the femoral head joint The establishment of the cone, the establishment of the model of the femoral shaft, and the establishment of the model of the connector between the femoral neck and the femoral shaft.
Embodiment 3
[0060] The optimal method for internal fixation of femoral neck fractures described in the above-mentioned embodiments, the establishment of the stress calculation model, the setting of the femoral fracture type and the fixation method: the stress calculation is calculated under normal circumstances, when a normal person stands on one leg , the value of the load on the femur from joints, muscles, etc. According to St. Venant's principle, the force acting on a certain point can evenly disperse the force into several smaller forces acting on more points at the same time, and the mechanical effects produced by them are equivalent. On the contrary, the same holds true. Therefore, we can combine many scattered and evenly distributed smaller forces on the nodes to synthesize a larger force to act on one node. According to a simplified force model proposed by Scige, the stresses that need to be calculated are joint reaction force J, gluteal muscle group force M, and iliotibial band ...
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