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Invasiveness of decompression surgery affects modeled lumbar spine kinetics in patients with degenerative spondylolisthesis – Lumbar Fusion

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This article discusses the surgical treatment of degenerative spondylolisthesis with spinal stenosis. The main focus is on decompression of the spinal canal and the decision to perform additional fusion. The article presents a study using computer simulation to evaluate the biomechanical effects of different decompression techniques. The study involved creating individualized models based on CT data from 15 patients. The results showed that the invasiveness of decompression significantly affected the biomechanics of the vertebrae and intervertebral discs. The findings suggest that computer simulation can provide valuable insights into the effects of different surgical approaches on lumbar spine functionality. Overall, the study demonstrates the feasibility of forecasting lumbar spine kinematics for various decompression methods, which may be helpful in future clinical applications

Summarised by Mr Mo Akmal – Lead Spinal Surgeon
The London Spine Unit : most established day surgery spinal centre in London

Published article

Introduction: The surgical treatment of degenerative spondylolisthesis with accompanying spinal stenosis focuses mainly on decompression of the spinal canal with or without additional fusion by means of a dorsal spondylodesis. Currently, one main decision criterion for additional fusion is the presence of instability in flexion and extension X-rays. In cases of mild and stable spondylolisthesis, the optimal treatment remains a subject of ongoing debate. There exist different opinions on whether…

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Front Bioeng Biotechnol. 2024 Jan 8;11:1281119. doi: 10.3389/fbioe.2023.1281119. eCollection 2023.ABSTRACTIntroduction: The surgical treatment of degenerative spondylolisthesis with accompanying spinal stenosis focuses mainly on decompression of the spinal canal with or without additional fusion by means of a dorsal spondylodesis. Currently, one main decision criterion for additional fusion is the presence of instability in flexion and,

Front Bioeng Biotechnol. 2024 Jan 8;11:1281119. doi: 10.3389/fbioe.2023.1281119. eCollection 2023.

ABSTRACT

Introduction: The surgical treatment of degenerative spondylolisthesis with accompanying spinal stenosis focuses mainly on decompression of the spinal canal with or without additional fusion by means of a dorsal spondylodesis. Currently, one main decision criterion for additional fusion is the presence of instability in flexion and extension X-rays. In cases of mild and stable spondylolisthesis, the optimal treatment remains a subject of ongoing debate. There exist different opinions on whether performing a fusion directly together with decompression has a potential benefit for patients or constitutes overtreatment. As X-ray images do not provide any information about internal biomechanical forces, computer simulation of individual patients might be a tool to gain a set of new decision criteria for those cases. Methods: To evaluate the biomechanical effects resulting from different decompression techniques, we developed a lumbar spine model using forward dynamic-based multibody simulation (FD_MBS). Preoperative CT data of 15 patients with degenerative spondylolisthesis at the level L4/L5 who underwent spinal decompression were identified retrospectively. Based on the segmented vertebrae, 15 individualized models were built. To establish a reference for comparison, we simulated a standardized flexion movement (intact) for each model. Subsequently, we performed virtual unilateral and bilateral interlaminar fenestration (uILF, bILF) and laminectomy (LAM) by removing the respective ligaments in each model. Afterward, the standardized flexion movement was simulated again for each case and decompression method, allowing us to compare the outcomes with the reference. This comprehensive approach enables us to assess the biomechanical implications of different surgical approaches and gain valuable insights into their effects on lumbar spine functionality. Results: Our findings reveal significant changes in the biomechanics of vertebrae and intervertebral discs (IVDs) as a result of different decompression techniques. As the invasiveness of decompression increases, the moment transmitted on the vertebrae significantly rises, following the sequence intact ➝ uILF ➝ bILF ➝ LAM. Conversely, we observed a reduction in anterior-posterior shear forces within the IVDs at the levels L3/L4 and L4/L5 following LAM. : Our findings showed that it was feasible to forecast lumbar spine kinematics after three distinct decompression methods, which might be helpful in future clinical applications.

PMID:38260753 | PMC:PMC10801739 | DOI:10.3389/fbioe.2023.1281119

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Invasiveness of decompression surgery affects modeled lumbar spine kinetics in patients with degenerative spondylolisthesis

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Front Bioeng Biotechnol. 2024 Jan 8;11:1281119. doi: 10.3389/fbioe.2023.1281119. eCollection 2023.ABSTRACTIntroduction: The surgical treatment of degenerative spondylolisthesis with accompanying spinal stenosis focuses mainly on decompression of the spinal canal with or without additional fusion by means of a dorsal spondylodesis. Currently, one main decision criterion for additional fusion is the presence of instability in flexion and
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