scholarly journals In Vivo Lumbar Intervertebral Disc Deformation During Lateral Bending Motion Under Different Load-Bearing Conditions

2021 ◽  
Author(s):  
Haoxiang Xu ◽  
Wangqiang Wen ◽  
Zepei Zhang ◽  
Bowen Kou ◽  
Jincheng Wu ◽  
...  
Keyword(s):  
Lumbar Spine ◽  
Intervertebral Disc ◽  
Tensile Deformation ◽  
Lumbar Disc ◽  
Lateral Bending ◽  
Lumbar Intervertebral Disc ◽  
Load Bearing ◽  
Compression Deformation ◽  
Left And Right

Abstract Background Lumbar Intervertebral Disc Degeneration (LDD) is one of the largest health worldwide problems, based on lost working time and associated costs. Inappropriate mechanical loading is considered to be an important factor in the development of LDD. L3-4 and L4-L5 were the commonly affected levels. Recent studies have measured geometric deformation of lumbar intervertebral discs during an in vivo functional weightbearing of the lumbar. The purpose of the present study was to determine the lumbar disc deformation in living human subjects during lateral bending motion under different load-bearing conditions. Methods 11 healthy subjects, 6 males and 5 females, aged 21 ≤ 39 years, with an average age of 30 ± 5 years, were recruited for the present study. Using the combination of dual fluoroscopic imaging system(DFIS)and CT, the sagittal images of L3-5 segments scanned by CT were transformed into three-dimensional reconstruction models and then matched to the instantaneous images of lumbar spine motion taken by a double fluorescent X-ray system under different loads. Motions were reproduced with the use of the combined imaging technique during left and right bending movements. Then, the kinematics data of the height, tension and compression deformation, and shear deformation of the lumbar intervertebral disc were obtained by using computer-related software. Result The data indicated that the tendency of tensile deformation during left and right bending was approximately symmetric. During the functional bending of the body, there was a greater compression deformation behind the same side of the movement and a higher tension deformation in front of the contralateral movement. The magnitude changed along the diagonal towards the posterolateral direction. During left bending, the upper vertebrae had a larger deformation range and tension deformation than the lower vertebrae. Meanwhile, it was not found that the small load had a significant effect on the tensile deformation of the intervertebral disc. Conclusion Lumbar disc deformation showed direction-specific and level-specific changes during lateral bending motion. These results could help understand the physiological motion characters of the lumbar spine and provide data support for other biomechanical studies.

scholarly journals Investigation of Geometric Deformations of The Lumbar Disc During Axial Body Rotations

2021 ◽  
Author(s):  
Haoxiang Xu ◽  
Wangqiang Wen ◽  
Zepei Zhang ◽  
Jianqiang Bai ◽  
Bowen Kou ◽  
...  
Keyword(s):  
Lumbar Spine ◽  
Imaging System ◽  
Lumbar Disc ◽  
Three Dimensional ◽  
Lumbar Intervertebral Disc ◽  
Fluoroscopic Imaging ◽  
Extra Weight ◽  
The Right ◽  
Deformation Patterns

Abstract BackgroundQuantitative data on in vivo vertebral disc deformations are critical for enhancing our understanding of spinal pathology and improving the design of surgical materials. This study investigated in vivo lumbar intervertebral disc deformations during axial rotations under different load-bearing conditions.MethodsTwelve healthy subjects (7 males and 5 females) between the ages of 25 and 39 were recruited. Using a combination of a dual fluoroscopic imaging system (DFIS) and CT, the images of L3-5 segments scanned by CT were transformed into three-dimensional models, which matched the instantaneous images of the lumbar spine taken by a double fluorescent X-ray system during axial rotations to reproduce motions. Then, the kinematic data of the compression and shear deformations of the lumbar disc and the coupled bending of the vertebral body were obtained.ResultsRelative to the supine position, the average compression deformation caused by rotation is between +10% and -40%, and the shear deformation is between 17% and 50%. Under physiological weightbearing loads, different levels of lumbar discs exhibit similar deformation patterns, and the deformation patterns of left and right rotations are approximately symmetrical. The deformation patterns change significantly under a 10 kg load, with the exception of the L3-4 disc during the right rotation.ConclusionThe deformation of the lumbar disc was direction-specific and level-specific during axial rotations and was affected by extra weight. These data can provide new insights into the biomechanics of the lumbar spine and optimize the parameters of artificial lumbar spine devices.

Measurement of in Vivo Lumbar Intervertebral Disc Pressure during Spinal Manipulation: A Feasibility Study

2006 ◽  
Vol 22 (3) ◽  
pp. 234-239 ◽  
Author(s):  
Anthony J. Lisi ◽  
Conor W. O’Neill ◽  
Derek P. Lindsey ◽  
Robert Cooperstein ◽  
Elaine Cooperstein ◽  
...  
Keyword(s):  
Intervertebral Disc ◽  
Nucleus Pulposus ◽  
Feasibility Study ◽  
Pressure Transducer ◽  
Spinal Manipulation ◽  
Lumbar Disc ◽  
Treatment Method ◽  
Lumbar Intervertebral Disc ◽  
Asymptomatic Adult

This paper presents the first reported measurements of lumbar intervertebral disc pressure in vivo during spinal manipulation. A pressure transducer was inserted into the nucleus pulposus of one normal-appearing lumbar disc in an asymptomatic adult volunteer. Pressures were recorded during several body positions and maneuvers, then during spinal manipulation, and lastly during a repetition of the preintervention body positions. Baseline pressures in the prone and side-lying positions measured 110 kPa and 150 kPa, respectively. During the manipulation, pressure rose to a peak of 890 kPa over 250 ms. Immediately following, pressures in the prone and side-lying positions measured 150 kPa and 165 kPa, respectively. These data do not support the hypotheses that manipulation can reduce a herniation by decreasing intradiscal pressure, or cause a herniation by raising pressure to failure levels. Further work may lead to a better understanding of this treatment method.

Association between Measures of Vertebral Endplate Morphology and Lumbar Intervertebral Disc Degeneration

2017 ◽  
Vol 68 (2) ◽  
pp. 210-216 ◽  
Author(s):  
Semra Duran ◽  
Mehtap Cavusoglu ◽  
Hatice Gul Hatipoglu ◽  
Deniz Sozmen Cılız ◽  
Bulent Sakman
Keyword(s):  
Intervertebral Disc ◽  
Disc Degeneration ◽  
Intervertebral Disc Degeneration ◽  
Lumbar Disc ◽  
Lumbar Disc Degeneration ◽  
Vertebral Endplate ◽  
Lumbar Intervertebral Disc ◽  
Sagittal Diameter ◽  
Magnetic Resonance Imaging Mri ◽  
Vertebral Endplates

Purpose The aim of this study was to evaluate the association between vertebral endplate morphology and the degree of lumbar intervertebral disc degeneration via magnetic resonance imaging (MRI). Methods In total, 150 patients who met the inclusion criteria and were 20–60 years of age were retrospectively evaluated. Patients were evaluated for the presence of intervertebral disc degeneration or herniation, and the degree of degeneration was assessed at all lumbar levels. Vertebral endplate morphology was evaluated based on the endplate sagittal diameter, endplate sagittal concave angle (ECA), and endplate sagittal concave depth (ECD) on sagittal MRI. The association between intervertebral disc degeneration or herniation and endplate morphological measurements was analysed. Results In MRI, superior endplates ( ie, inferior endplates of the superior vertebra) were concave and inferior endplates ( ie, superior endplates of the inferior vertebra) were flat at all disc levels. A decrease in ECD and an increase in ECA were detected at all lumbar levels as disc degeneration increased ( P < .05). At the L4-L5 and L5-S1 levels, a decrease in ECD and an increase in ECA were detected in the group with herniated lumbar discs ( P < .05). There was no association between lumbar disc degeneration or herniation and endplate sagittal diameter at lumbar intervertebral levels ( P > .05). At all levels, ECD of women was significantly lesser than that of men and ECA of women was significantly greater than that of men ( P < .05). Conclusions There is an association between vertebral endplate morphology and lumbar intervertebral disc degeneration. Vertebral endplates at the degenerated disc level become flat; the severity of this flattening is correlated with the degree of disc degeneration.

scholarly journals Lumbago is different from prolapse of lumbar intervertebral disc

2018 ◽  
Vol 6 (2) ◽  
Author(s):  
Wei Zhou ◽  
Yanbo Qiu ◽  
Shaoqiu Zhou ◽  
Wei Zhao
Keyword(s):  
Low Back Pain ◽  
Back Pain ◽  
Intervertebral Disc ◽  
Lumbar Disc ◽  
Posterior Longitudinal Ligament ◽  
Low Back ◽  
Lumbar Intervertebral Disc ◽  
Disc Protrusion ◽  
Medical Reform ◽  
System Disease

<p>There are many errors found in the content of textbook in National Higher Education.For example:One of the errors found in the“Surgery”version no 418 is about movement system disease section.In chapter 677 Section III,the content misinterpretation of the cause of low back pain is the intervertebral disc protrusion that stimulate the outer annulus and the posterior longitudinal ligament in the sinus nerve fibers.For the past twenty years,feedbacks had been reflected repeatedly to the involved party but no one had admitted the contents of the textbook are wrong.The errors had brought great economy loss,physical and mental pain to patients.Every year,the country has to spend billions of dollars in the waste of medical reform reimbursement.This article is aimed to discuss about low back pain is not due to lumbar disc herniation.</p>

scholarly journals Three-Dimensional Biomechanical Finite Element Analysis of Lumbar Disc Herniation in Middle Aged and Elderly

2022 ◽  
Vol 2022 ◽  
pp. 1-11
Author(s):  
Shiyuan Wan ◽  
Bin Xue ◽  
Yanhao Xiong
Keyword(s):  
Finite Element ◽  
Intervertebral Disc ◽  
Lumbar Disc Herniation ◽  
Vertebral Body ◽  
Disc Herniation ◽  
Lumbar Disc ◽  
Three Dimensional ◽  
Surgical Methods ◽  
Left And Right ◽  
The Impact

Lumbar intervertebral disc protrusion disease refers to the degeneration of intervertebral disc, rupture of fibrous ring, nucleus pulpous protrusion and stimulation or compression of nerve root. The import command in Mimics medical 3D reconstruction software was used to erase the irrelevant image data and obtain vertebral body images. The original 3D model of each vertebral body was built by 3D computing function. A three-dimensional finite element model was established to analyze the effect of different surgical methods on the mechanical distribution of the spine after disentomb. The stress distribution of the spine, intervertebral disc, and left and right articular cartilage at L4/L5 stage and the position shift of the fourth lumbar vertebra were analyzed under 7 working conditions of vertical, forward flexion, extension, left and right flexion, and left and right rotation. The results showed that the established model was effective, and the smaller the area of posterior laminar decompression was, the lesser the impact on spinal stability was. The PELD treatment of lumbar disc herniation had little impact on spinal biomechanics and could achieve good long-term biomechanical stability. Combining the clinical experiment method and finite element simulation, using the advantages of finite element software to optimize the design function can provide guidance for the design and improvement of medical devices and has important significance for the study of clinical mechanical properties and biomechanics.

Intervertebral Disc Function Is Restored in an In Vivo Model of Chronic Nucleus Pulposus Glycosaminoglycan Reduction

2008 ◽  
Author(s):  
John I. Boxberger ◽  
Joshua D. Auerbach ◽  
Sounok Sen ◽  
George R. Dodge ◽  
Dawn M. Elliott
Keyword(s):  
Intervertebral Disc ◽  
Nucleus Pulposus ◽  
Disc Degeneration ◽  
Lumbar Disc ◽  
Post Treatment ◽  
In Vivo Model ◽  
Long Term Effects ◽  
Early Human

Reduced nucleus pulposus glycosaminoglycan (GAG) content is one of the earliest clinically detectable changes during the course of intervertebral disc degeneration [1,2]. Depletion of nucleus GAG by small percentages consistent with this early loss has been experimentally linked to altered motion segment mechanical function, and thus, potentially increases the risk of damage accumulation directly due to elevated stresses and strains and through altered cellular function [3]. Recently, our laboratory has established an in vivo model in a rat lumbar disc which moderately decreases nucleus GAG to levels observed in early human degeneration. In this model, GAG loss is accompanied by a state of hypermobility at both 4 and 12 weeks post treatment [4], potentially making the disc susceptible to mechanical failure. The objective of this study was to determine the long term effects of nucleus GAG depletion and to determine if altered discs demonstrate hallmark features of disc degeneration. We hypothesized that GAG will remain depleted 24 weeks post treatment, potentially decreasing to lower levels, and further that geometrical and mechanical changes consistent with degeneration will be observed.

scholarly journals Experimental evaluation of precision and accuracy of RSA in the lumbar spine

2020 ◽  
Author(s):  
Marie Christina Keller ◽  
Christof Hurschler ◽  
Michael Schwarze
Keyword(s):  
Lumbar Spine ◽  
Focal Spot ◽  
Lateral Bending ◽  
Flexion Extension ◽  
Hip And Knee Arthroplasty ◽  
Spinal Region ◽  
Precision And Accuracy ◽  
Bone Structures

Abstract Purpose Roentgen stereophotogrammetric analysis is a technique to make accurate assessments of the relative position and orientation of bone structures and implants in vivo. While the precision and accuracy of stereophotogrammetry for hip and knee arthroplasty is well documented, there is insufficient knowledge of the technique’s precision and, especially accuracy when applied to rotational movements in the spinal region. Methods The motion of one cadaver lumbar spine segment (L3/L4) was analyzed in flexion–extension, lateral bending and internal rotation. The specific aim of this study was to examine the precision and accuracy of stereophotogrammetry in a controlled in vitro setting, taking the surrounding soft tissue into account. The second objective of this study was to investigate the effect of different focal spot values of X-ray tubes. Results Overall, the precision of flexion–extension measurements was found to be better when using a 0.6 mm focal spot value rather than 1.2 mm (± 0.056° and ± 0.153°; respectively), and accuracy was also slightly better for the 0.6 mm focal spot value compared to 1.2 mm (− 0.137° and − 0.170°; respectively). The best values for precision and accuracy were obtained in lateral bending for both 0.6 mm and 1.2 mm focal spot values (precision: ± 0.019° and ± 0.015°, respectively; accuracy: − 0.041° and − 0.035°). Conclusion In summary, the results suggest stereophotogrammetry to be a highly precise method to analyze motion of the lumbar spine. Since precision and accuracy are better than 0.2° for both focal spot values, the choice between these is of minor clinical relevance.

scholarly journals Sequestered Intradural Lumbar Disc

2009 ◽  
Vol 36 (6) ◽  
pp. 776-778
Author(s):  
Alim P. Mitha ◽  
Forrest D. Hsu ◽  
James N. Scott ◽  
Bassam M. Addas ◽  
Yves Starreveld
Keyword(s):  
Lumbar Spine ◽  
Lumbar Disc ◽  
Plantar Flexion ◽  
Sudden Onset ◽  
Sensory Testing ◽  
Local Hospital ◽  
Sharp Pain ◽  
Neurological Exam ◽  
Left And Right ◽  
Anal Sensation

A 42-year-old farmer was lifting a hay bale and experienced a sudden onset of sharp pain radiating down his left leg. Over the ensuing week, the pain became less pronounced, but was replaced with a progressive left greater than right leg numbness, foot weakness, and urinary hesitancy. He presented to his local hospital, where he was initially managed conservatively, and then transferred to our institution for consultation after an MR lumbar spine was completed. On physical exam, he had grade 1/5 weakness of left and right dorsi- and plantar flexion. Sensory testing showed a moderate decrease in pinprick sensation in his left leg from L1 to S1 dermatomes. He was symmetrically hyporeflexic with grade 1 knee reflexes and absent ankle jerks. Peri-anal sensation was intact, but there was moderately reduced rectal tone. The remainder of his neurological exam was normal.

Spondylolisthesis following lumbar disc surgery in a child

1971 ◽  
Vol 34 (4) ◽  
pp. 563-568 ◽  
Author(s):  
Arthur Kobrine ◽  
Paul C. Bucy
Keyword(s):  
Intervertebral Disc ◽  
Case Reports ◽  
Lumbar Disc ◽  
Lumbar Disc Surgery ◽  
Lumbar Intervertebral Disc ◽  
Related Case ◽  
Content Type ◽  
Disc Surgery ◽  
Roentgenographic Examination ◽  
Fine Print

✓ The case of a 13-year-old boy with a gelatinous, herniated lumbar intervertebral disc is reported. Roentgenographic examination 8 years following laminectomy demonstrated spondylolysis and spondylolisthesis of L-5 on S-1. Related case reports and theories are tabulated and discussed.

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