Biomechanical Evaluation of Two Posterior Lumbar Intervertebral Fusion Surgical Scenarios Reinforced by a Rigid Posterior Fixation System in the Vertebral Column Analyzed by the Finite Element Method

Samir Zahaf,Said Kebdani,Benaoumer Aour,Noureddine Zina,Mehdi Ghalem Abdelkader Mestar

doi:10.5101/nbe.v10i3.p258-278

Abstract

Biomechanical Evaluation of Two Posterior Lumbar Intervertebral Fusion Surgical Scenarios Reinforced by a Rigid Posterior Fixation System in the Vertebral Column Analyzed by the Finite Element Method

Highlights

The lumbar interbody fusion procedure is an effective and popular surgical technique for treating low back pain related to degenerative disc disease [1]
computed tomography (CT) data were imported into MIMICS software to establish seventeen vertebral bodies, one pelvis, seventeen annulus fibrosus (ANN) and seventeen nucleus pulposus (NUC), which
To simulate the posterior lumbar interbody fusion (PLIF) model (I), the S1-L5 level of the INT model underwent laminectomy and partial discectomy, which included removal of supraspinous, interspinous, and flavum ligaments; bilateral PEEK alloy cages (10 mm × 14 mm × 25 mm) with pedicle screw fixation were inserted in this model (Fig. 7), six pedicle screws (r = 3 mm) and two rods (r = 2.5 mm) are simulated by tetrahedral elements, type (Solid187)

Summary

Introduction

The lumbar interbody fusion procedure is an effective and popular surgical technique for treating low back pain related to degenerative disc disease [1]. The aims of posterior lumbar interbody fusion (PLIF) procedure using cages or bone grafts are to provide stability of the motion segment and to facilitate the fusion process. Several studies reported the major complications of this surgical method with a wide range of incidence varying between 1% and 39%, such as collapse, retropulsion of the grafted bone, and pseudoarthrosis [3,4,5,6] To resolve such problems, the PLIF with cages was designed in 1991 [7]. Many studies reported that the PLIF with cages could provide satisfactory clinical results [810] This surgical scenario produced new problems such as adjacent segment degeneration (ASD), fine motion and mote of cages, and implants damage [11, 12]. CT data were imported into MIMICS software to establish seventeen vertebral bodies, one pelvis, seventeen annulus fibrosus (ANN) and seventeen nucleus pulposus (NUC), which

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A Pressure

Results and Discussion

Conclusions