A Three Dimensional Finite Element Model to Study the Biomechanical and Kinematic Characteristics of the Human Lumbar Spine in Flexion
A Three Dimensional Finite Element Model to Study the Biomechanical and Kinematic Characteristics of the Human Lumbar Spine in Flexion

Author: Dhruv Jitesh Mehta

Publisher:

Published: 2007

Total Pages: 71

ISBN-13:

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The aim of the research was to develop a three-dimensional finite element model to study the biomechanical and kinematic characteristics of the human lumbar spine in flexion. An analytical model of the lumbar spine capable of taking into consideration the actual geometry, non-linear material properties and realistic loading would be of benefit in studying normal biomechanics, as well as in-vivo behavior in injured and surgically altered spines. Fundamental to this approach is an accurate model of the spine. This was achieved by modeling the lumbar segments L2-L4 from Computed Tomography (CT) data and analyzing them under loading conditions that best approximated the human lumbar segments in flexion. An in-vitro study was performed for validation of the finite element model. Human lumbar cadaveric spinal segments (L2-L4) were loaded based on test conditions similar to those defined in the finite element analysis. The results of the cadaver biomechanical study and finite element analysis were compared. The results suggest that the model is a valid approach to assessing the range of motion of the L3 segment under flexion. Rotation under lateral bending moments was additionally investigated to provide a thorough validation of the model.

Three Dimensional Analysis of Spinal Deformities
Three Dimensional Analysis of Spinal Deformities

Author: M. D'Amico

Publisher: IOS Press

Published: 1995

Total Pages: 478

ISBN-13: 9789051991819

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Changes in Shape of the Spine with Idiopathic Scoliosis after Harrington or C-D Instrumentation: The Plan View -- 3-D Correction Obtained with the C-D Procedure During Surgery -- Results of Treatment of Scoliosis with the Cotrel-Dubousset Technique -- Technics and Preliminary Results Colorado -- A Preliminary Report on the Surgical Realignment of Adolescent Idiopathic Scoliosis with Isola Instrumentation -- Osteoporotic Fractures with Neurological Complications -- Simulation of Surgical Maneuvers with C-D Instrumentation -- Adolescence and Orthopaedic Braces: Psychological Conflicts? -- Preliminary Results of Specific Exercises During In-Patient Scoliosis Rehabilitation -- Cardiopulmonary Performance in Patients with Severe Scoliosis - Outcome after Specific Rehabilitation -- Scoliotic Flatback and Specific Rehabilitation -- Chapter 6. Surface Topography & Internal 3-D Spinal and/or Trunk Anatomy -- Scoliosis Follow-Up by Back Shape Analysis -- Evaluation of Its Reliability -- Digital 3D Moiré - Topography -- Evolution of Scoliosis by Optical Scanner I.S.I.S. -- Automated 360° Degree Profilometry of Human Trunk for Spinal Deformity Analysis -- Spinal Surface Digitization Using 'Metrecom' in Scoliosis Screening -- High-Resolution Rasterstereography -- Reproducibility and Reliability of the Quantec Surface Imaging System in the Assessment of Spinal Deformity -- Investigation of the Diurnal Variation in the Water Content of the Intervertebral Disc Using MRI and Its Implications for Scoliosis -- Author Index

Biomechanics of the Spine
Biomechanics of the Spine

Author: Navid Soltani

Publisher: LAP Lambert Academic Publishing

Published: 2014-02

Total Pages: 96

ISBN-13: 9783659512025

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To achieve a new method for predicting the result of disc replacement or to predict biomechanics of lumbar (or any other skeletal segment) by finite element model analysis, its necessary to follow an organized procedure including 3D bone model, meshing the proposed model, designing an artificial implant and simulation of loading condition. In this study we try to explain the whole procedure step by step from importing the CT image to analysis of lumbar section with designed implant. First it's explained how the 3D model can be made based on the CT image using MIMICS software and some details related to simulation of the skeletal model by this software will be released. Second part shows the tutorial method for importing proposed model in ABAQUS software and how it can be analyzed. This step by step tutorial is helpful in lumbar biomechanics and creating human body skeletal model. Also it is useful to achieve a perfect procedure for creating and analyzing lumbar disc implant.

A Three-dimensional, EMG-assisted, Push-pull Model for Assessing Dynamic Loads on Each Level of the Lumbar Spine
A Three-dimensional, EMG-assisted, Push-pull Model for Assessing Dynamic Loads on Each Level of the Lumbar Spine

Author: Gregory George Knapik

Publisher:

Published: 2005

Total Pages: 210

ISBN-13:

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The overall goal of this research was to develop a three-dimensional, EMG-assisted model for assessing dynamic loads at each level of the lumbar spine during mobile pushing and pulling exertions like those typically seen in industrial work. This model was then used to examine the calculated model performance measures and the spinal loads developed during actual pushing and pulling tasks across a range of handle heights, hand force levels, and handle degrees of freedom by both male and female subjects. The makeup of industrial work has recently changed, favoring pushing and pulling with carts and other material handling devices instead of lifting. Accordingly, pushing and pulling are now extremely prevalent in industry. In pushing and pulling, the majority of the force requirement is in the horizontal, rather than vertical direction. While the magnitude of the force is typically smaller than in lifting, the horizontal direction of the force results in the application of greater shear forces on the spine in pushing and pulling. The few studies that have examined shear forces have reported that the spine has a smaller tolerance to shear forces than compressive forces. As a result, even though smaller magnitude forces are imposed on the spine than in lifting, there is still a possibility of injury in pushing and pulling due to the lower tolerance level.

Rothman-Simeone The Spine E-Book
Rothman-Simeone The Spine E-Book

Author: Harry N. Herkowitz

Publisher: Elsevier Health Sciences

Published: 2011-02-10

Total Pages: 2021

ISBN-13: 1437736246

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Rothman-Simeone The Spine helps you achieve optimal outcomes in the clinical practice of spine surgery in adults and children. Drs. Harry N. Herkowitz, Steven R. Garfin, Frank J. Eismont, Gordon R. Bell, Richard Balderston, and an internationally diverse group of authorities help you keep up with the fast-paced field and get the best results from state-of-the-art treatments and surgical techniques, such as spinal arthroplasty and the latest spinal implants and equipment. An all-new full-color design and surgical videos online at www.expertconsult.com make this classic text more invaluable than ever before. Get the best results from the full range of both surgical and non-surgical treatment approaches with guidance from the world’s most trusted authorities in orthopaedic spine surgery. Find important information quickly through pearls, pitfalls, and key points that highlight critical points. Watch experts perform key techniques in real time with videos, on DVD and online, demonstrating minimally invasive surgery: SED procedure; thorascopic techniques; lumbar discectomy; pedicle subtraction osteotomy (PSO); C1, C2 fusion; intradural tumor; cervical laminoforaminoty; and much more. Apply the newest developments in the field thanks to expert advice on minimally invasive surgery, spinal arthroplasty and the latest spinal implants and equipments. See procedures clearly through an all new full-color design with 2300 color photographs and illustrations placed in context. Access the fully searchable contents of text online at www.expertconsult.com.