不同扭矩对腰椎融合后邻近上节段生物力学影响的实验研究

doi:10.13418/j.issn.1001-165x.2016.01.022

Abstract

Abstract:

Objective　To evaluate the effects of small different torsion torques on intradiscal pressure（IDP）and pressure in the facet joints (PFJ )on the upper adjacent segment before and after lumbar spinal fusion.　Methods　Twelve lumbar porcine cadaveric motion segments were divided into two groups and loaded in the neutral position with 300 N of axial compression. IDP and PFJ at L3/4 measurements were obtained at 0, 1.0, and 2.0 Nm of torsion before and after lumbar spinal fusion (L4/5). Results The IDP increased with the increase of torsion torques. The changes of IDP in different torsion torques had statistically significant difference. Both non fusion group and fusion group, the PFJ become more and higher, the larger torsion torque, the higher PFJ. The changes of PFJ in the fusion group and non-fusion group both had statistically significant difference.　Conclusions　The IDP in the fusion group increases with the torsion torque increasing. The PFJ increases with the torsion torque increasing in non-fusion group and fusion group.

Key words: Low back and leg pain, Lumbar spinal fusion, Adjacent segment degeneration, Biomechanics

References

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The study on biomechanical effect of different torsion torque on the adjacent segment after lumbar fusion

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