scholarly journals Behavior of the Intervertebral Disc Within the Motion Segment L3-L4 of The Human Spine Under Various Types of Physiological Load / Odozva Medzistavcovej Platničky V Rámci Pohybového Segmentu L3-L4 Ľudskej Chrbtice Na Rôzne Typy Fyziologického Zaťaženia

2012 ◽  
Vol 12 (2) ◽  
pp. 106-116
Author(s):  
Mária Minárová ◽  
Jozef Sumec ◽  
Mária Tješšová
Keyword(s):  
Lumbar Spine ◽  
Intervertebral Disc ◽  
Mathematical Treatment ◽  
Basic Part ◽  
Human Spine ◽  
Motion Segment ◽  
Physiological Load ◽  
Human Lumbar Spine ◽  
Biomechanical Investigation ◽  
Computational Implementation

Abstract The paper deals with the biomechanical investigation on the motion segment - basic part of the human lumbar spine focused on the intervertebral disc response to the various types of load. It contains the description and the reason of the simplification of the model, the biomechanical laws; the mathematical treatment with the computational implementation added. The results are presented and discussed especially for the intervertebral disc.

scholarly journals Biomechanics Of Human Lumbar Spine (L3 To L5) With Degenerative Disc Disease Using Finite Element Model

2019 ◽  
Vol 8 (6) ◽  
pp. 4609-4614
Keyword(s):  
Finite Element ◽  
Lumbar Spine ◽  
Finite Element Model ◽  
Disc Degeneration ◽  
Human Body ◽  
Lumbar Disc ◽  
Element Model ◽  
Human Spine ◽  
Human Lumbar Spine ◽  
Normal Human

Human spine is one of the complex structure of the human body. It provides the link between upper and lower extremities of the human body. It is estimated that at least 30% of people in the middle age group from thirty to fifty years have some degree of disc degeneration. Disc degeneration disease can affect the quality of life and in certain individual it can cause severe chronic pain if left untreated. The low back pain associated with lumbar disc degeneration is usually generated from two causes which are abnormal motion instability and inflammation. Abnormal motion instability occurs when the annulus fibrosus are worn down and cannot absorb stress on the human spine effectively resulting in changes in movements along the vertebral segment. To understand lumbar disc problem, a thorough knowledge of the biomechanics of the normal human lumbar spine and a disc degenerated lumbar spine is of great importance. In this study, Computed tomography image of a 33 year old male is used. A three dimensional (3D) human lumbar spine (L3 to L5) is created and validated with literature. The finite element model was modified to degenerated disc and studied the biomechanics of the lumbar spine. Comparison of the biomechanics of normal human lumbar spine is done with the human lumbar spine with disc degeneration for different range of motion and different loads. The result shows that the pressure generated on degenerated disc is greater than normal disc. This work can be implemented and used for designing implants and also for intervertebral disc related analysis

Effects of motion segment level, Pfirrmann intervertebral disc degeneration grade and gender on lumbar spine kinematics

2016 ◽  
Vol 34 (8) ◽  
pp. 1389-1398 ◽  
Author(s):  
Muturi G. Muriuki ◽  
Robert M. Havey ◽  
Leonard I. Voronov ◽  
Gerard Carandang ◽  
Michael R. Zindrick ◽  
...  
Keyword(s):  
Lumbar Spine ◽  
Intervertebral Disc ◽  
Disc Degeneration ◽  
Intervertebral Disc Degeneration ◽  
Motion Segment ◽  
Spine Kinematics ◽  
And Gender

Mechanics Characteristic Research of Human Lumbar Spine Based on the Changed Gradient for 3-D Printer

2014 ◽  
Vol 988 ◽  
pp. 449-452
Author(s):  
Bo Zhang ◽  
Heng Zhi Cai ◽  
Gang Zhou ◽  
Ya Jun Zhang ◽  
Jian Zhuang
Keyword(s):  
Lumbar Spine ◽  
Intervertebral Disc ◽  
Material Properties ◽  
Geometric Model ◽  
Three Dimensional ◽  
Artificial Joint ◽  
Human Lumbar Spine ◽  
Mechanics Characteristic ◽  
Spine Model ◽  
Gradient Change

According to the spinal anatomy data, three-dimensional geometric model of human lumbar spine L3-L5 segment is established in this paper. In the model, the vertebra is divided into cortical bone, cancellous bone, endplate and other structures. The connection between the vertebrae and intervertebral disc is simulated as contact joint. The material properties of lumbar parts of the structure are not the same, the elastic modulus is changing in the analysis. Based on the model, the deformation of the lumbar spine under different size of axial force and lateral torque is simulated. The simulation result shows the variation regularity of the deformation of vertebrae and intervertebral disc under the condition of different pressure. This research provides a quantitative reference for spinal bio-mechanics. The human spine model with a gradient change sets the foundation for processing field of artificial joint using the 3D printing technology.

scholarly journals INFLUENCE OF THE SAGITTAL LUMBAR PARAMETERS ON THE STRESS-STRAIN STATE OF THE SPINAL MOTOR SEGMENTS AT TRANSPEDICULAR FIXATION

2021 ◽  
pp. 37-48
Author(s):  
Barkov Barkov ◽  
Oleg Veretelnik ◽  
Mykola Tkachuk ◽  
Mykola А. Tkachuk ◽  
Victor Veretelnik
Keyword(s):  
Lumbar Spine ◽  
Intervertebral Disc ◽  
Cortical Bone ◽  
Lumbar Lordosis ◽  
Strain State ◽  
Maximum Stress ◽  
Stress Strain ◽  
Stress Strain State ◽  
Spinal Motor ◽  
Human Lumbar Spine

Objective. To study the stress-strain state of the elements of the human lumbar spine when we use the transpedicular system, taking into account different angular values of segmental and total lumbar lordosis. Methods. For computer modeling of the stress-strain state of the elements of the human lumbar spine after mono- and polysegmental fixation, the Workbench product was used, and for the construction of parametric three-dimensional geometricmodels — the SolidWorks computer-aided design system was used. 4 groups of decisions were studied, which differed in angular values of segmental and total lumbar lordosis. In each group, 11 models were analyzed that describe the lumbar segments after mono- and polysegmental fixation in various configurations of the sagittal alignment of the lumbar spine. Results. It was found that the maximum stress on the cortical bone is concentrated on the base of the LV in case of the «pathological» intervertebral disc LV–S in the group of patients with hyperlordosis. At polysegmental fixation of the LI – S, there is a redistribution of stress on the cortical bone of all vertebrae, the maximum values of which is present in the bodies of the LV and S vertebrae. And only in the group with hypolordosis this stress is minimal. The maximum stress was always on the overlying intervertebral disc during transpedicularfixation. Significant increasing of cartilage stress in the facet joints of the LIV–LV segment was recorded during fixation of the LV–S segmentin case of hyperlordosis. The maximum stress on the rods was identified in the group of patients with hyperlordosis and polysegmentalfixation of the LI –S, on screws — on LV, LIV, LIII vertebrae during fixation in all groups, except for hypolordosis. Conclusions. Increasing in angular values (hyperlordosis), which describe segmental and total lumbar lordosis, leads to the stress elevation in the fixing elements and structures of the spinal motor segments, and, conversely, a decreasing in angular values (hypolordosis) causes the stress falling.

scholarly journals Visualization of intervertebral disc degeneration in a cadaveric human lumbar spine using microcomputed tomography

2019 ◽  
Vol 236 (2) ◽  
pp. 243-251
Author(s):  
Sascha Senck ◽  
Klemens Trieb ◽  
Johann Kastner ◽  
Stefan G. Hofstaetter ◽  
Herbert Lugmayr ◽  
...  
Keyword(s):  
Lumbar Spine ◽  
Intervertebral Disc ◽  
Disc Degeneration ◽  
Intervertebral Disc Degeneration ◽  
Microcomputed Tomography ◽  
Human Lumbar Spine

NUMERICAL VALIDATION OF A FIBER-REINFORCED HYPERELASTIC CONSTITUTIVE MODEL FOR HUMAN INTERVERTEBRAL DISC ANNULUS FIBROSUS

2011 ◽  
Vol 11 (01) ◽  
pp. 163-176
Author(s):  
XIONGQI PENG ◽  
YU WANG ◽  
ZAOYANG GUO ◽  
SHAOQING SHI
Keyword(s):  
Experimental Data ◽  
Lumbar Spine ◽  
Constitutive Model ◽  
Intervertebral Disc ◽  
Numerical Simulations ◽  
Annulus Fibrosus ◽  
Fe Model ◽  
Fiber Reinforced ◽  
Cadaveric Specimen ◽  
Motion Segment

This paper validates a constitutive model for human intervertebral disc annulus fibrosus via numerical simulations on a lumber spine motion segment. This anisotropic hyperelastic fiber-reinforced constitutive model was previously developed by the authors. Based on three-dimensional (3D) lumbar spine segments that are constructed from CT scanning images, a detailed and anatomically accurate human lumbar spine finite element (FE) model for L3–L4 motion segment is developed. The FE model includes vertebral bodies, intervertebral disc, and various ligaments. Numerical simulations are carried out by using commercial CAE software package ABAQUS/Standard. The loading cases considered in the numerical analysis are set to be consistent with sets-up of cadaveric specimen testing available in the literature. Numerical results such as load–displacement curves and nucleus pressure are compared with experimental data. Simulation results show good consistency with cadaveric experimental data, and have good biomechanical fidelity. The constitutive model can be used for human intervertebral disc modeling and biomechanical analysis of human spine column.

Sign in / Sign up

Export Citation Format

Share Document