Finite Element Analysis of Human Knees with Different Morphological Abnormalities PDF Download
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Author: Matteo Losapio
Publisher:
ISBN:
Category :
Languages : en
Pages :
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Author: Matteo Losapio
Publisher:
ISBN:
Category :
Languages : en
Pages :
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Author: Zahra Trad
Publisher: Springer
ISBN: 3319741586
Category : Technology & Engineering
Languages : en
Pages : 94
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Book Description
In recent years, numerous scientific investigations have studied the anatomical, biomechanical and functional role of structures involved in the human knee joint. The Finite Element Method (FEM) has been seen as an interesting tool to study and simulate biosystems. It has been extensively used to analyse the knee joint and various types of knee diseases and rehabilitation procedures such as the High Tibial Osteotomy (HTO). This work presents a review on FEM analysis of the human knee joint and HTO knee surgery, and discusses how adequate this computational tool is for this type of biomedical applications. Hence, various studies addressing the knee joint based on Finite Element Analysis (FEA) are reviewed, and an overview of clinical and biomechanical studies on the optimization of the correction angle of the postoperative knee surgery is provided.
Author: Niels Vankrunkelsven
Publisher:
ISBN:
Category :
Languages : en
Pages :
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Due to certain deviations of the knee anatomy, the cartilage, the ligaments or patella, some knees are less efficient to absorb shocks and transfer forces. This means the knees will wear out faster, which may result in premature necessity for knee prosthesis. The cartilage is a tissue which does not have blood vessels. As a result, the natural regeneration of the tissue is very limited. This thesis sheds light on the most common deviations of the knee anatomy. The different models are processed and simulated to examine the influence of the knee anatomy on stress and pressure in the knee joint. Patient 1 is a male with a common knee. Patient 2 is a male with a small medial condyle of the femoral cartilage. Patient 3 is a male with a large medial condyle of the femoral cartilage. Due to ethical principles it is not possible to test the influences of the knee anatomy on a living patient. Tests can be performed on cadaver knees. The tests have to be done as soon as possible after the death of the donor. Another problem is that everyone has different knees, like fingerprints they are unique. Assembling a database containing all morphological deviations is impossible. Consequently, a cooperation with engineers is started in order to simulate and examine the knee models. The aim of the present thesis is to examine the influences of the deviations of the knee anatomy before and after a meniscectomy. Using Finite Element Analysis we examine the stress and pressure points in a human knee joint. Another aim of the present paper is to develop a procedure to optimise the model for a Finite Element Analysis. We succeeded in developing an optimisation procedure. This procedure can be used to optimise any scan for a Finite Element Analysis, which was not possible with most of the existing procedures. The developed procedure can be used in any field of research in which model optimisation of a 3D object is used. Most numerical model studies in the field of biomechanics have been focusing on stress analysis of a common knee. Medical experience, however, suggests that most knee complaints arise with divergent knees. Issues of the knee joint can be predicted and anticipated in an early stage by using Finite Element Analyses.
Author: Buvanesvari V K
Publisher: Independent Author
ISBN: 9785065461034
Category : Health & Fitness
Languages : en
Pages : 0
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Book Description
The finite element modelling (FEM) is a powerful instrument to study articular and tissue mechanics, as it allows variables to be manipulated and situations simulated which are difficult or impossible to evaluate clinically or experimentally. The accuracy of FE models depends on well-defined anatomy, material properties and limits. Due to the significant inter-tissue structural variability in morphology, analysis of individual and insights tends to involve a subject- specific FE modelling. Modelling efforts in in vivo were limited by difficulties in data acquisition and multimodal data analysis, including proper registration and integration of data, in finite element model construction or validation. Recent, several techniques have increased the potential to incorporate accurate tissue boundaries and morphology for image reconstruction based on subject specific finite element analysis. Hence, the proposed system uses image segmentation with 3D FEM uses the concept of image segmentation of medical images. The proposed system uses canny edge detection or improved canny edge detection for the segmentation of medical images. The canny edge method extracts the edge information of MR images of knee cartilage by incorporating a vector image model. The study also uses certain noise removal models at its pre-processing stage to remove the presence of Rician noise in MRI. Finally, the obtained segmented edges is sent as input to the 3D conversion in Ansys. The ground truth information is collected from the skilled doctors, who are experts in knee.
Author: Nor Akmal Halim
Publisher:
ISBN:
Category : Finite element method
Languages : en
Pages : 38
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Book Description
Three dimensional model of human knee were developed to clarify the causes of knee joint injuries such as osteoarthritis, bursitis, and ligament tears. The model developed allowed the simulation by the performance of Finite Element Analysis (FEA) of different angles and different forces. The purpose of this study is to evaluate the result of kneeling 60 degree, kneeling 90 degree, and squatting to the knee joint with and without kneepad. However, this study is focused for construction worker such as mining worker. This study was simulated by using Autodesk Simulation Multiphysics to solve the finite element analysis. There are several crucial points to the proper application of numerical method such as the geometry, material properties, and boundary condition must be created to solve the finite element analysis that must have in finite element method. The force applied is at the area patella with the value of 303N, 603 N, and 903 N. The femur bone, tibia bone, and patella are assumed as rigid body. From the result the effect of kneeling 90 degree, kneeling 120 degree flexion, and squatting to the patella., the maximum stress on patella of 90 degree flexion is higher because have larger contact surface area as the knee was bent than 60 degree flexion and 120 degree flexion. For stress vs. deformation for cartilage, the position of 90 degree flexion give the higher stress and deformation as the stress on patella was high the stress to the cartilage became higher the contact stress of patella occur at the superior half of the patella and an area of the femoral groove just above the notch that means the contact stress of patella to cartilage 90 degree flexion was larger than 60 degree and 120 degree flexion. As for ligaments, at 90 degree flexion,the higher stress occur at ACL for without and with kneepad with the value 0.507 MPa and 0.0667 MPa with the percentage of absorption to the kneepad is 86%, followed by PCL 98.5 %. MCL is 99.4%, and LCL 98.5 %. From the result, it is true that the most common ligament injuries in mining or construction worker is ACL tear as the results shows that ACL gives highest stress that other ligaments. PCL had lower stress than ACL as in medical, PCL gives far less common injury than ACL because of PCL function itself that maintaining joint normal function. From the research, it can be concluded that wearing the kneepad will reduce the stress on knee ligament of construction worker to prevent injury and knee pain.
Author: Kozaburo Hayashi
Publisher: Springer Science & Business Media
ISBN: 4431669515
Category : Medical
Languages : en
Pages : 278
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Book Description
The combination of readily available computing power and progress in numerical techniques has made nonlinear systems - the kind that only a few years ago were ignored as too complex - open to analysis for the first time. Now realistic models of living systems incorporating the nonlinear variation and anisotropic nature of physical properties can be solved numerically on modern computers to give realistically usable results. This has opened up new and exciting possibilities for the fusing of ideas from physiology and engineering in the burgeoning new field that is biomechanics. Computational Biomechanics presents pioneering work focusing on the areas of orthopedic and circulatory mechanics, using experimental results to confirm or improve the relevant mathematical models and parameters. Together with two companion volumes, Biomechanics: Functional Adaptation and Remodeling and the Data Book on Mechanical Properties of Living Cells, Tissues, and Organs, this monograph will prove invaluable to those working in fields ranging from medical science and clinical medicine to biomedical engineering and applied mechanics.
Author: Amirsadegh Rezazadeh Nochehdehi
Publisher: Elsevier
ISBN: 0323907210
Category : Technology & Engineering
Languages : en
Pages : 765
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Book Description
Cartilage, Tissue and Knee Joint Biomechanics: Fundamentals, Characterization and Modelling is a cutting-edge multidisciplinary book specifically focused on modeling, characterization and related clinical aspects. The book takes a comprehensive approach towards mechanics, fundamentals, morphology and properties of Cartilage Tissue and Knee Joints. Leading researchers from health science, medical technologists, engineers, academics, government, and private research institutions across the globe have contributed to this book. This book is a very valuable resource for graduates and postgraduates, engineers and research scholars. The content also includes comprehensive real-world applications. As a reference for the total knee arthroplasty, this book focuses deeply on existing related theories (including: histology, design, manufacturing and clinical aspects) to assist readers in solving fundamental and applied problems in biomechanical and biomaterials characterization, modeling and simulation of human cartilages and cells. For biomedical engineers dealing with implants and biomaterials for knee joint injuries, this book will guide you in learning the knee anatomy, range of motion, surgical procedures, physiological loading and boundary conditions, biomechanics of connective soft tissues, type of injuries, and more. Provides a comprehensive resource on the knee joint and its connective soft tissues; content included spans biomechanics, biomaterials, biology, anatomy, imaging and surgical procedure Covers ISO and FDA based regulatory control and compliance in the manufacturing process Includes discussions on the relationship between knee anatomical parameters and knee biomechanics
Author: L. Tugan Muftuler
Publisher: CRC Press
ISBN: 1439852650
Category : Medical
Languages : en
Pages : 529
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Book Description
In the medical imaging field, clinicians and researchers are increasingly moving from the qualitative assessment of printed images to the quantitative evaluation of digital images since the quantitative techniques often improve diagnostic accuracy and complement clinical assessments by providing objective criteria. Despite this growing interest, the field lacks a comprehensive body of knowledge. Filling the need for a complete manual on these novel techniques, Quantifying Morphology and Physiology of the Human Body Using MRI presents a wide range of quantitative MRI techniques to study the morphology and physiology of the whole body, from the brain to musculoskeletal systems. Illustrating the growing importance of quantitative MRI, the book delivers an indispensable reference for readers who would like to explore in vivo MRI techniques to quantify changes in the morphology and physiology of tissues caused by various disease mechanisms. With internationally renowned experts sharing their insight on the latest developments, the book goes beyond conventional MRI contrast mechanisms to include new techniques that measure electromagnetic and mechanical properties of tissues. Each chapter offers comprehensive information on data acquisition, processing, and analysis techniques as well as clinical applications. The text organizes the techniques based on their primary use either in the brain or the body. Some of the techniques, such as diffusion-weighted imaging and diffusion tensor imaging, span several application areas, including brain imaging, cancer imaging, and musculoskeletal imaging. The book also covers up-and-coming quantitative techniques that explore tissue properties other than the presence of protons (or other MRI-observable nuclei) and their interactions with their environment. These novel techniques provide unique information about the electromagnetic and mechanical properties of tissues and introduce new frontiers of study into disease mechanisms.
Author: Matteo Zago
Publisher: Frontiers Media SA
ISBN: 2889665615
Category : Science
Languages : en
Pages : 328
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Book Description
Author: Mohd Nazri Bajuri
Publisher: Springer Science & Business Media
ISBN: 3642319068
Category : Technology & Engineering
Languages : en
Pages : 83
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Book Description
This book presents an analysis of the stress distribution and contact stresses in severe rheumatoid wrist after total wrist arthroplasty. It assesses and compares the load transfer throughout the joint and contact pressure at the articulations. The data obtained from this study is of importance as this provide greater evidence to the benefits of total wrist arthroplasty in rheumatoid arthritis patients.
