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Development, calibration and validation of a comprehensive customizable lumbar spine FE model for simulating fusion constructs – Lumbar Fusion

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The article titled “Development of a Hexahedral Morphological Lumbosacral Finite Element Model to Predict the Biomechanics of Surgical Instrumentation on Patient-Specific Diseased Spine Segments” discusses the use of finite element models to predict the effects of surgical instrumentation on the biomechanics of the spine. The researchers developed a comprehensive hexahedral morphological lumbosacral finite element model to predict range of motions, disc pressures, and facet contact forces of the intact and instrumented spine. The model was extensively validated and compared to in vitro experimental results, showing statistically significant comparable values. The developed model was also computationally efficient while maintaining accuracy in response prediction. The findings of this study can be used to predict the impact of different instrumentation techniques on the lumbar vertebral column

Summarised by Mr Mo Akmal – Lead Spinal Surgeon
The London Spine Unit : best situated spine centre in London

Published article

Instrumentation alters the biomechanics of the spine, and therefore prediction of all output quantities that have critical influence post-surgically is significant for engineering models to aid in clinical predictions. Geometrical morphological finite element models can bring down the development time and cost of custom intact and instrumented models and thus aids in the better inference of biomechanics of surgical instrumentation on patient-specific diseased spine segments. A comprehensive…

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Med Eng Phys. 2023 Aug;118:104016. doi: 10.1016/j.medengphy.2023.104016. Epub 2023 Jun 28.ABSTRACTInstrumentation alters the biomechanics of the spine, and therefore prediction of all output quantities that have critical influence post-surgically is significant for engineering models to aid in clinical predictions. Geometrical morphological finite element models can bring down the development time and cost of custom intact,

Med Eng Phys. 2023 Aug;118:104016. doi: 10.1016/j.medengphy.2023.104016. Epub 2023 Jun 28.

ABSTRACT

Instrumentation alters the biomechanics of the spine, and therefore prediction of all output quantities that have critical influence post-surgically is significant for engineering models to aid in clinical predictions. Geometrical morphological finite element models can bring down the development time and cost of custom intact and instrumented models and thus aids in the better inference of biomechanics of surgical instrumentation on patient-specific diseased spine segments. A comprehensive hexahedral morphological lumbosacral finite element model is developed in this work to predict the range of motions, disc pressures, and facet contact forces of the intact and instrumented spine. Facet contact forces are needed to predict the impact of fusion surgeries on adjacent facet contacts in bending, axial rotation, and extension motions. Extensive validation in major physiological loading regimes of the pure moment, pure compression, and combined loading is undertaken. In vitro, experimental corridor results from six different studies reported in the literature are compared and the generated model had statistically significant comparable values with these studies. Flexion, extension and bending moment rotation curves of all segments of the developed model were favourable and within two separately established experimental corridor windows as well as recent simulation results. Axial torque moment rotation curves were comparable to in vitro results for four out of five lumbar functional units. The facet contact force results also agreed with in vitro experimental results. The current model is also computationally efficient with respect to contemporary models since it uses significantly smaller number of elements without losing the accuracy in terms of response prediction. This model can further be used for predicting the impact of different instrumentation techniques on the lumbar vertebral column.

PMID:37536837 | DOI:10.1016/j.medengphy.2023.104016

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Development, calibration and validation of a comprehensive customizable lumbar spine FE model for simulating fusion constructs

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Med Eng Phys. 2023 Aug;118:104016. doi: 10.1016/j.medengphy.2023.104016. Epub 2023 Jun 28.ABSTRACTInstrumentation alters the biomechanics of the spine, and therefore prediction of all output quantities that have critical influence post-surgically is significant for engineering models to aid in clinical predictions. Geometrical morphological finite element models can bring down the development time and cost of custom intact

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