TLIF后路不同的内固定方式生物力学特性的比较分析

doi:10.13418/j.issn.1001-165x.2016.05.015

Abstract

Abstract:

Objective　To investigate the biomechanical effect of transforaminal lumbar interbody fusion (TLIF) with three different types of posterior instruments.　Methods　A validated L3~5 FE model was modified to simulate three different TLIF finite element modelsat L4~5: unilateral pediclescrew fixation;bilateral pedicle screw fixation; a unilateral pedicle screw fixation supplemented with contralateral facet screw construct. Various biomechanical parameters were evaluated for intact and implanted models in all loading planes.　Results　When compared with the intact model, all reconstructive models displayed decreased motion at L4~5, and Model B conferred greater stability in flexion-extension (18.2% of intact model). The maximum stress of instruments was found in Model C with 234.9 MPa under left lateral bending. In addition, Model B generated the lowest cage stress.　Conclusion　The reconstruction with bilateral pedicle screw fixation can gain the optimal stability and decrease posterior instrumentation stress. A unilateral pedicle screw fixation supplemented with contralateral facet screw construct could also gain a relatively good stability.

Key words: Transforaminal lumbar interbody fusion, Pedicle screw fixation, Contralateral facet screw construct, Finite element analysis

YU Wei-bo,LIANG De, YE Lin-qiang,HUANG Xue-cheng,YAO Zhen-song, JIANG Xiao-bing. The biomechanical effect of transforaminal lumbar interbody fusion with different types of posterior instruments for stabilization[J]. Chinese Journal Of Clinical Anatomy, 2016, 34(5): 551-556.

References

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The biomechanical effect of transforaminal lumbar interbody fusion with different types of posterior instruments for stabilization

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