[Objective]To investigate the biomechanical stability of cannulated screws combined with fibula allograft in the treatment of femoral neck fractures,and to provide theoretical basis for a new clinical treatment method of femoral neck fractures.[Methods]Three-dimensional finite element analysis was used to analyze the mechanical properties of cannulated screws combined with fibula allograft in the treatment of femoral neck fractures.Based on the CT data of a 45-year-old male volunteer with normal anatomy of the pelvis and femur,three-dimensional reconstruction,reverse engineering,finite element mechanical analysis and other techniques were used to establish three-dimensional finite element models of the surgical methods of cannulated screws combined with fibula allograft and multiple cannulated screws for mechanical analysis,and the biomechanical stability of the two internal fixation configurations was evaluated.[Results]There was no significant difference in the distribution in the maximum stress and displacement of the femoral head and neck cortex and the maximum stress within the bone tissue and internal fixation between the cannulated screws combined with fibular allograft and multiple cannulated screws operation.However,the maximum stress and displacement of the femoral head neck cortex and the maximum stress of the bone and internal fixation in the cannulated screw combined with fibular allograft group were significantly lower than those in the multiple cannulated screw group.[Conclusion]The mechanical stability of cannulated screws combined with fibular allograft is better than that of multiple cannulated screws,which can provide good mechanical stability for the healing of femoral neck fracture,and provide mechanical support after the femoral head necrosis,to prevent the collapse of the femoral head.It is an ideal surgical method for the treatment of femoral neck fractures.
关键词
股骨颈骨折/股骨头坏死/生物力学/三维有限元/空心螺钉/同种异体腓骨
Key words
femoral neck fractures/femoral head necrosis/biomechanics/three-dimensional finite element/cannulated screw/fibular allograft
维普
万方数据