Three-dimensional finite element analysis of two and three cannulated hip screws fixation for adductive femoral neck fractures / 中国矫形外科杂志

ABSTRACT

[Objective]To explore the biomechanical stability of fixation with two and three cannulated compression screws in treatment of the adductive femoral neck fractures by the three-dimensional finite element analysis(FEA).[Method]Two FEA models of two screws and three screws for adductive femoral neck facture fixations were set up to investigate the simulated loading of three different conditions.[Result]At the condition of the heel touching the ground and the middle position,there was no difference in the biomechanical stabilities of the two models.However,at the condition of the tiptoe departing from the groud,the model of three screws fixation was better in torsion resistance and stretching resistance.[Conclusion]The biomechanical stability of fixation with two screws is determined by the direction of loading.Three cannulated compression screws fixation provides better biomechanical stability.