Three-dimensional geometrical and mechanical modelling of the lumbar spine

Lavaste, F.; Skalli, Wafa; Robin, Stéphane; Roy-Camille, R; Mazel, Christian

doi:10.1016/0021-9290(92)90071-8

Cited by 183 publications

(75 citation statements)

References 22 publications

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“…The advantage of the analytical over the experimental approach is that no new specimens are needed to modify particular parameters such as the degree of resection, the loads or the boundary conditions. The process of comparing numerical to experimental data and subsequently adjusting the computer model makes the finite element method a powerful tool for analysing such biomechanical problems, as other studies have shown [6,7,11,19,25,26].…”

mentioning

confidence: 99%

Influence of graded facetectomy and laminectomy on spinal biomechanics

Zander

Rohlmann

Klöckner

et al. 2003

European Spine Journal

141

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Facetectomy and laminectomy are techniques for decompressing lumbosacral spinal stenosis. Resections of posterior bony or ligamentous parts normally lead to a decrease in stability. The degree of instability depends on the extent of resection, the loading situation and the condition of the intervertebral discs. The correlation between these parameters is not well understood. In order to investigate how these parameters relate to one another, a three-dimensional, non-linear finite element model of the lumbosacral spine was created. Intersegmental rotations, intradiscal pressures, stresses, strains and forces in the facet joints were calculated while simulating an intact spine as well as different extents of resection (left and bilateral hemifacetectomy, hemilaminectomy and bilateral laminectomy, two-level laminectomy), disc conditions (intact and degenerated) and loading situations (pure moment loads, standing and forward bending). The results of the modelling showed that a unilateral hemifacetectomy increases intersegmental rotation for the loading situation of axial rotation. Expanding the resection to bilateral hemifacetectomy increases intersegmental rotation even more, while further resection up to a bilateral laminectomy has only a minor additional effect. Hemilaminectomy and laminectomy only differ in their effect for ventriflexion and muscle-supported forward bending. Two-level laminectomy increases the intersegmental rotation only for standing. Degenerated discs result in smaller intersegmental rotations and higher disc stresses at the respective levels. Decompression procedures affect the examined biomechanical parameters less markedly in degenerated than in intact discs. Resection of posterior bony or ligamentous elements has a stronger influence on the amount than on the distribution of stresses and deformations in a disc. It has only a minor effect on the biomechanical behaviour of the adjacent region. Spinal stability is decreased after a laminectomy for forward bending, and after a two-level laminectomy for standing. For axial rotation, spinal stability is decreased even after a hemifacetectomy. Patients should therefore avoid excessive axial rotation after such a treatment.

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mentioning

confidence: 99%

Influence of graded facetectomy and laminectomy on spinal biomechanics

Zander

Rohlmann

Klöckner

et al. 2003

European Spine Journal

141

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“…Collagen fibers of the annulus were considered as bilinear elastic isotropic tension-only material. [26][27][28][29] All the seven ligaments were integrated in the model with bilinear elastic tension-only materials of the literature again.…”

Section: Methodsmentioning

confidence: 99%

Finite element analysis of long-time aging and sudden accidental degeneration of lumbar spine segments in compression

Kovács¹,

Oroszváry²

2013

Biomech Hung

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Abstract3D finite element analysis of long term aging and sudden accidental degeneration processes is presented for physiologic compression load. A systematic modeling and simulation is applied for analyzing the separated and mutual effect of certain material moduli of the components of lumbar motion segments on the mechanical behaviour and stability of the segment during the long time and sudden degeneration processes. It was concluded that due to their smallest stiffness the younger segments with light degeneration are the most vulnerable during both the long-time age-related and the sudden overload-related degeneration.

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“…Most geometrical and dynamic physics modelling of lumbar spine in the literature are carried out using Finite Element Modelling (FEM). One of the earliest techniques that uses FEM is detailed in [22] and [35]. A more recent technique to create 3D geometrical and mechanical model of lumbar spine with FEM is proposed by Nabhani and Wake [36] which modelled the L4 and L5 vertebrae.…”

Section: Three-dimensional Geometrical and Physics Modelling Of Lumbamentioning

confidence: 99%

A Framework on a Computer Assisted and Systematic Methodology for Detection of Chronic Lower Back Pain Using Artificial Intelligence and Computer Graphics Technologies

Kafri

Sudirman

Hussain

et al. 2016

Intelligent Computing Theories and Application

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Abstract. Back pain is one of the major musculoskeletal pain problems that can affect many people and is considered as one of the main causes of disability all over the world. Lower back pain, which is the most common type of back pain, is estimated to affect at least 60% to 80% of the adult population in the United Kingdom at some time in their lives. Some of those patients develop a more serious condition namely Chronic Lower Back Pain in which physicians must carry out a more involved diagnostic procedure to determine its cause. In most cases, this procedure involves a long and laborious task by the physicians to visually identify abnormalities from the patient's Magnetic Resonance Images. Limited technological advances have been made in the past decades to support this process. This paper presents a comprehensive literature review on these technological advances and presents a framework of a methodology for diagnosing and predicting Chronic Lower Back Pain. This framework will combine current state-of-the-art computing technologies including those in the area of artificial intelligence, physics modelling, and computer graphics, and is argued to be able to improve the diagnosis process.

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Three-dimensional geometrical and mechanical modelling of the lumbar spine

Cited by 183 publications

References 22 publications

Influence of graded facetectomy and laminectomy on spinal biomechanics

Influence of graded facetectomy and laminectomy on spinal biomechanics

Finite element analysis of long-time aging and sudden accidental degeneration of lumbar spine segments in compression

A Framework on a Computer Assisted and Systematic Methodology for Detection of Chronic Lower Back Pain Using Artificial Intelligence and Computer Graphics Technologies

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