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Lumbar vertebropexy after unilateral total facetectomy – Lumbar Spinal Stenosis

This article presents the findings of a biomechanical cadaveric study that aimed to test two different synthetic lumbar vertebral stabilization techniques after unilateral total facetectomy. The study found that both the interspinous vertebropexy and spinolaminar vertebropexy techniques significantly reduced the range of motion (ROM) in the tested spinal segments. Interspinous vertebropexy effectively counteracted destabilization after facetectomy and limited ROM in flexion and extension without fully immobilizing the segment. Spinolaminar vertebropexy not only reduced ROM but also restored anteroposterior stability, providing control of shear forces after facetectomy. These results suggest that lumbar vertebropexy may be a promising alternative for stabilizing the spine and counteracting the destabilizing effects of facetectomy

Summarised by Mr Mo Akmal – Lead Spinal Surgeon
The London Spine Unit : most specialised treatment facility in London

Published article

CONCLUSION: Interspinous vertebropexy seems to sufficiently counteract destabilization after unilateral total facetectomy, and limits range of motion in flexion and extension while avoiding full segmental immobilization. Spinolaminar vertebropexy additionally restores native anteroposterior stability, allowing satisfactory control of shear forces after facetectomy.

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Spine J. 2023 Jul 12:S1529-9430(23)03259-X. doi: 10.1016/j.spinee.2023.07.005. Online ahead of print.ABSTRACTBACKGROUND CONTEXT: Posterior decompression with spinal instrumentation and fusion is associated with well-known complications. Alternatives that include decompression and restoration of native stability of the motion segment without fusion continue to be explored, however, an ideal solution has yet to be identified.PURPOSE: The aim of,

Spine J. 2023 Jul 12:S1529-9430(23)03259-X. doi: 10.1016/j.spinee.2023.07.005. Online ahead of print.

ABSTRACT

BACKGROUND CONTEXT: Posterior decompression with spinal instrumentation and fusion is associated with well-known complications. Alternatives that include decompression and restoration of native stability of the motion segment without fusion continue to be explored, however, an ideal solution has yet to be identified.

PURPOSE: The aim of this study was to test two different synthetic lumbar vertebral stabilization techniques that can be used after unilateral total facetectomy.

STUDY DESIGN: Biomechanical cadaveric study.

METHODS: Twelve spinal segments were biomechanically tested after unilateral total facetectomy and stabilized with a FiberTape cerclage. The cerclage was pulled through the superior and inferior spinous process (interspinous technique) or through the spinous process and around both laminae (spinolaminar technique). The specimens were tested after (1) unilateral total facetectomy, (2) interspinous vertebropexy and (3) spinolaminar vertebropexy. The segments were loaded in flexion-extension (FE), lateral shear (LS), lateral bending (LB), anterior shear (AS) and axial rotation (AR).

RESULTS: Unilateral facetectomy increased native ROM in FE by 10.6% (7.6-12.6%), in LS by 25.8% (18.7-28.4%), in LB 7.5% (4.6-12.7%), in AS 39.4% (22.6-49.2%), and in AR by 27.2% (15.8-38.6%). Interspinous vertebropexy significantly reduced ROM after unilateral facetectomy: in FE by 73% (p=0.001), in LS by 23% (p=0.001), in LB by 13% (p=0.003), in AS by 16% (p=0.007), and in AR by 20 % (p=0.001). In FE and LS the ROM was lower than in the baseline/native condition. In AS and AR, the baseline ROM was not reached by 17% and 1%, respectively. Spinolaminar vertebropexy significantly reduced ROM after unilateral facetectomy: in FE by 74% (p=0.001), in LS by 24% (p=0.001), in LB by 13% (p=0.003), in AS by 28% (p=0.004), and in AR by 15 % (p=0.001). Baseline ROM was not reached by 9% in AR.

CONCLUSION: Interspinous vertebropexy seems to sufficiently counteract destabilization after unilateral total facetectomy, and limits range of motion in flexion and extension while avoiding full segmental immobilization. Spinolaminar vertebropexy additionally restores native anteroposterior stability, allowing satisfactory control of shear forces after facetectomy.

CLINICAL SIGNIFICANCE: Lumbar vertebropexy seems promising to counteract the destabilizating effect of facetectomy by targeted stabilization.

PMID:37451550 | DOI:10.1016/j.spinee.2023.07.005

The London Spine Unit : most specialised treatment facility in London

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Lumbar vertebropexy after unilateral total facetectomy

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Spine J. 2023 Jul 12:S1529-9430(23)03259-X. doi: 10.1016/j.spinee.2023.07.005. Online ahead of print.ABSTRACTBACKGROUND CONTEXT: Posterior decompression with spinal instrumentation and fusion is associated with well-known complications. Alternatives that include decompression and restoration of native stability of the motion segment without fusion continue to be explored, however, an ideal solution has yet to be identified.PURPOSE: The aim of

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