Download or read book A Finite Element Study of the Human Proximal Femur Bone Fracture Patterns Due to Impact written by Reena Thomas and published by . This book was released on 2008 with total page 292 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Numerical and Experimental Study of Failure of the Human Proximal Femur written by Ronald R. Van Court and published by . This book was released on 1996-03-01 with total page 71 pages. Available in PDF, EPUB and Kindle. Book excerpt: Static and dynamic experiments were conducted to study the failure loads and fracture patterns of human proximal femur bones, that are intact and core drilled. This was done to assist orthopedic surgeons better understand the effects of core drilling into the femoral head to remove osteonecrosis. Unlike pervious studies, where only static tests were conducted, dynamic tests were preformed to better simulate a lateral fall. A Finite Element Analysis (FEA) was also completed to understand stress distributions in the proximal femur when subjected to static and dynamic loads. Previous PEA models of the femur analyzed static loads only with just a core drilled hole at the lesser trochanter. This PEA model examines various sizes of hole diameters and locations on the greater trochanter as well as having the model loaded statically and dynamically.
Download or read book Digital Volume Correlation Analysis Of The Deformation And Fracture Mechanism In The Human Femur written by Enrico Dall'Ara and published by . This book was released on 2017 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: INTRODUCTION: Understanding the mechanism of osteoporotic femoral neck fractures is important for improving osteoporosis diagnosis and treatment. Standard mechanical testing can measure the femoral stiffness and strength under different loading scenarios. However, it does not provide information about internal deformations and location of fracture onset. A combination of time-elapsed micro-CT imaging under step-wise loading, digital volume correlation (DVC) and micro-finite-element modelling has the potential of providing insight into bone tissue deformation occurring in the human femur under load [1]. The goal of this study is to determine the bone tissue deformation in the human femur subjected to increasing loads in a physiologically realistic loading configuration, up to fracture.METHODS: Time-lapsed micro-CT imaging (29.81 u00b5m/voxel, isotropic) of three human cadaver femora (women, 75 u2013 80 years of age) was performed at the Australian Synchrotron (Clayton, VIC, Australia) [1]. A single-leg stance loading configuration (8uf0b0 adducted in the frontal plane) was experimentally applied to the femurs and step-wise increased, until causing a clinically relevant fracture of the femoral neck (4 uf02d 5 load steps). Micro-CT imaging of the entire femoral epiphysis was performed first under no load, then at each intermediate load step and after fracture. Cross-section images were resampled to 120u00b5m/pixel to reduce DVC time. Images obtained under each load step were rigidly registered to the unloaded scan (Dataviewer, Skyscan-Bruker). The same co-registration process was also applied to the full-resolution micro-CT images of the proximal femur including femoral head and lesser trochanter. The displacements at the nodes of an isotropic grid superimposed to the images was obtained using a deformable image registration toolkit (ShIRT [3]). The nodal spacing was set to 50 voxels (6 mm cell size), providing a strain measurement precision of 500u03bcu03b5. Apparent bone strains were calculated by differentiating the displacements using a finite-element (FE) code (Ansys, Inc, USA). A micro-FE model of a 1.5 mm thick intermediate coronal slice from the full-resolution images was built using in-house code [2], resulting in 40 uf02d 50M nodes. The displacement field calculated using DVC was linearly? interpolated on a fraction (~ 1/33,000) of the micro-FE nodes. Bone tissue strains were computed using a preconditioned conjugate gradient solver (ANSYS, Inc, USA). Images, apparent and tissue strain maps and experimentally observed fracture patterns were compared.RESULTS SECTION: Two femurs opened in the proximal subcapital neck while the third femur showed a displacement of the femoral head transversal to the neck axis (shear). Distributions of apparent tensile and compressive elastic strain consistently showed increased tensile strain concentrations in the superior femoral neck, which corresponds to the region where then the fracture occurred (Figure 1). At the time of writing, the displacement-driven micro-FE simulation of bone tissue strain was completed for a single specimen, which fractured by opening in the proximal subcapital region. Bone tissue displayed a high, fairly uniform, deformation of the principal compressive and tensile trabecular groups, whereas other large bone regions were subjected to minimal deformation (Figure 2). No strain concentration was observed in correspondence of the fracture location, which also contained a void underneath the thin superior cortex. The post-fracture images displayed a permanent change in shape of the femoral head away from the fracture location. DISCUSSION: It is possible that the fairly uniform strain in the bone tissue found before fracture causes collapse in the inner main trabecular network and, in turn, that the related geometrical changes of the external bone surface cause bending and fracture of the thin superior cortical wall in proximity of the subcortical void observed. This ongoing study demonstrates the combination of time-lapsed microuf02dCT imaging, DVC and micro-FE for studying strain in the bone tissue of human femurs while causing clinically relevant femoral fractures. This expands on current knowledge of the hip deformation and fracture mechanism. SIGNIFICANCE/CLINICAL RELEVANCE: Upon completion, this comprehensive analysis is expected to advance our understanding of the bone structure-function relationships in the human femur, under realistic loading configurations and two different fracture types (subcapital opening and shear). This information may impact to research on hip mechanics and across different anatomical sites. This research may also impact to the clinical management and early diagnosis of bone fracture. REFERENCES: 1. Martelli & Perilli, J. Mech. Behav. Biomed. Mater. 84, 265u2013272 (2018); 2. Martelli et al., 2015 CMBE: Zeta Computational Resources Ltd., pp. 110-113.; 3. Dallu2019Ara et al., J. Biomech. 47, 2956u201363 (2014).ACKNOWLEDGEMENTS: EPSRC Frontier Grant (EP/K03877X/1); Australian Research Council (DE140101530).
Download or read book Orthogeriatrics written by Paolo Falaschi and published by Springer Nature. This book was released on 2021 with total page 355 pages. Available in PDF, EPUB and Kindle. Book excerpt: This new open access edition supported by the Fragility Fracture Network aims at giving the widest possible dissemination on fragility fracture (especially hip fracture) management and notably in countries where this expertise is sorely needed. It has been extensively revised and updated by the experts of this network to provide a unique and reliable content in one single volume. Throughout the book, attention is given to the difficult question of how to provide best practice in countries where the discipline of geriatric medicine is not well established and resources for secondary prevention are scarce. The revised and updated chapters on the epidemiology of hip fractures, osteoporosis, sarcopenia, surgery, anaesthesia, medical management of frailty, peri-operative complications, rehabilitation and nursing are supplemented by six new chapters. These include an overview of the multidisciplinary approach to fragility fractures and new contributions on pre-hospital care, treatment in the emergency room, falls prevention, nutrition and systems for audit. The reader will have an exhaustive overview and will gain essential, practical knowledge on how best to manage fractures in elderly patients and how to develop clinical systems that do so reliably.
Download or read book A Finite Element Study on Fracture Patterns in Human Scaphoid Wrist Bone Due to Free Fall written by Munsif Ahmed Madni and published by . This book was released on 2011 with total page 186 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Law of Bone Remodelling written by Julius Wolff and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 339 pages. Available in PDF, EPUB and Kindle. Book excerpt: Translated from the German by Maquet, P.; Furlong, R.
Download or read book Injury Analysis and Treatment Planning with Virtual Human Body Models written by Fuhao Mo and published by Frontiers Media SA. This book was released on 2024-07-25 with total page 344 pages. Available in PDF, EPUB and Kindle. Book excerpt: Life-saving medical and scientific research-based interventions are extending people's lives and saving the lives of people who have suffered from diseases and injuries. This has led to an increased need for the development of technical and medical devices for the prevention, rehabilitation, and treatment of injuries. With the development of computer technology, more and more virtual models of the human body have been developed for biomedical and biomechanical research and application. Reliable virtual body models can efficiently improve injury prediction and rehabilitation, as well as disease diagnosis and treatment. For the past decade, biomechanical virtual human body models have experienced major advancements in terms of development methods, model biofidelity, availability, and applications.
Download or read book Textbook of Bone Metastases written by Claude Jasmin and published by John Wiley & Sons. This book was released on 2005-09-27 with total page 582 pages. Available in PDF, EPUB and Kindle. Book excerpt: The epidemiological and clinical importance of bone metastases has long been recognised. For example, the incidence of bone metastases in breast and prostate cancers is 70%, whereas it is only 30 to 40% in metastatic lung cancer. In clinical terms, bone metastases have substantial negative effects on the patient's quality of life. Bone metastases have generally received insufficient attention because of the difficulty in quantifying them, which has left them outside the scope of therapeutic trials This textbook is the result of the remarkable progress made in the understanding of the molecular and cellular mechanisms involved in osteogenesis and osteolysis, and their development for therapeutic purposes. The treatment of malignant hypercalcaemia has also been revolutionised by the use of bisphosphonates. The Textbook of Bone Metastases presents a broad approach to recent progress in all fields related to bone metastases, ranging from epidemiology to the physiopathology of bone metastases and therapeutics. It provides a better understanding of recent advances and, more importantly, will give clinicians all the information needed to help them in the clinical and therapeutic management of patients with bone metastases.
Download or read book Marcus and Feldman s Osteoporosis written by David W. Dempster and published by Academic Press. This book was released on 2020-10-08 with total page 1950 pages. Available in PDF, EPUB and Kindle. Book excerpt: Marcus and Feldman's Osteoporosis, Fifth Edition, is the most comprehensive, authoritative reference on this disease. Led by a new editorial team, this fifth edition offers critical information on reproductive and hormonal risk factors, new therapeutics, ethnicity, nutrition, therapeutics, management and economics, comprising a tremendous wealth of knowledge in a single source not found elsewhere. Written by renowned experts in the field, this two-volume reference is a must-have for biomedical researchers, research clinicians, fellows, academic and medical libraries, and any company involved in osteoporosis drug research and development. - Summarizes the latest research in bone biology and translational applications in a range of new therapeutic agents, including essential updates on therapeutic uses of calcium, vitamin D, SERMS, bisphosphonates, parathyroid hormone, and new therapeutic agents - Recognizes the critical importance of new signaling pathways for bone health, including Wnt, OPG and RANK, of interest to both researchers who study bone biology and clinicians who treat osteoporosis - Offers new insights into osteoporosis associated with menopause, pre-menopause, chronic kidney disease, diabetes, HIV and other immune disorders
Download or read book The Comprehensive Classification of Fractures of Long Bones written by Maurice E. Müller and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 254 pages. Available in PDF, EPUB and Kindle. Book excerpt: The history of the origin and development of the new Classification of Fractures was described in the preface to the French edition. The history of the acceptance of this new concept dates back to 1986, when the Swiss Association for the Study of the Problems of Internal Fixation (AO) accepted the new Classification of Fractures. In the same year, the Trustees of the AO/ASIF Foundation, at their annual meeting in Montreux, adopted the new AO Classification as the basis for fracture classification to be used in the planned third edition of the AO/ASIF Manual. In August 1987, the French edition of "The Comprehensive Classification of Fractures of Long Bones" made its first appearance, coincident with the Congress of the International Society of Orthopaedic Surgery (SICOn in Munich. This precipitated a great deal of interest in the subject. This interest persisted, so that in February of 1988 the President of SICOT, Sir Dennis Paterson, formed a "Presidential Commission for Documentation and Evaluation" with Maurice E. Muller as Chairman.
Download or read book Biomimetics written by Mehmet Sarikaya and published by American Institute of Physics. This book was released on 1995 with total page 318 pages. Available in PDF, EPUB and Kindle. Book excerpt: Market: Students and researchers in geophysics, astronomy, and astrophysics. This book reports on the timely Earth Observing System (EOS) Program's wide range of scientific investigations, observational capabilities, vast data and information system, and educational activities. Because its primary goal is to determine the extent, causes, and regional consequences of global climate change, this program provides the scientific knowledge needed by world leaders to formulate sound and equitable environmental policies.
Download or read book Hip Arthroscopy and Hip Joint Preservation Surgery written by Shane J. Nho and published by Springer Nature. This book was released on 2022-08-01 with total page 1874 pages. Available in PDF, EPUB and Kindle. Book excerpt: The field of hip preservation surgery has evolved over the past decade as our understanding of hip pathomechanics and pathomorphology has expanded. The published literature on non-arthritic hip pathology, for example, has grown exponentially. The topics of controversy in the past decade have been answered in some cases, but new questions have also arisen. In addition to the 99 chapters in the original edition – most of which will be retained and updated as applicable – there will be over 30 brand new chapters focusing on new and more sophisticated techniques from authors that have been the pioneers of the field. The text is divided into nine thematic sections, covering the breadth of the topic and the current state of the art: basic science of the hip; operative basics for hip arthroscopy and open hip preservation surgery; pediatric hip conditions; approaches to disorders of the hip and pelvis; enthesopathy and neuromuscular disorders; hip fractures and instability; avascular necrosis; hip cartilage restoration; and oncologic conditions. Throughout, there is a heavy emphasis on surgical techniques, and video clips will be included in selected chapters. Written by edited by thought leaders and seasoned practitioners in the field, this new edition of Hip Arthroscopy and Hip Joint Preservation Surgery will remain the gold standard for orthopedic surgeons and sports medicine specialists, expanding on the range of techniques available to clinicians treating injuries to and disorders of the hip.
Download or read book AO Principles of Fracture Management written by Thomas P. Rüedi and published by Thieme. This book was released on 2000 with total page 898 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Practical Finite Element Analysis written by Nitin S. Gokhale and published by FINITE TO INFINITE. This book was released on 2008 with total page 27 pages. Available in PDF, EPUB and Kindle. Book excerpt: Highlights of the book: Discussion about all the fields of Computer Aided Engineering, Finite Element Analysis Sharing of worldwide experience by more than 10 working professionals Emphasis on Practical usuage and minimum mathematics Simple language, more than 1000 colour images International quality printing on specially imported paper Why this book has been written ... FEA is gaining popularity day by day & is a sought after dream career for mechanical engineers. Enthusiastic engineers and managers who want to refresh or update the knowledge on FEA are encountered with volume of published books. Often professionals realize that they are not in touch with theoretical concepts as being pre-requisite and find it too mathematical and Hi-Fi. Many a times these books just end up being decoration in their book shelves ... All the authors of this book are from IIT€™s & IISc and after joining the industry realized gap between university education and the practical FEA. Over the years they learned it via interaction with experts from international community, sharing experience with each other and hard route of trial & error method. The basic aim of this book is to share the knowledge & practices used in the industry with experienced and in particular beginners so as to reduce the learning curve & avoid reinvention of the cycle. Emphasis is on simple language, practical usage, minimum mathematics & no pre-requisites. All basic concepts of engineering are included as & where it is required. It is hoped that this book would be helpful to beginners, experienced users, managers, group leaders and as additional reading material for university courses.
Download or read book Personalized Hip and Knee Joint Replacement written by Charles Rivière and published by Springer Nature. This book was released on 2020-06-30 with total page 346 pages. Available in PDF, EPUB and Kindle. Book excerpt: This open access book describes and illustrates the surgical techniques, implants, and technologies used for the purpose of personalized implantation of hip and knee components. This new and flourishing treatment philosophy offers important benefits over conventional systematic techniques, including component positioning appropriate to individual anatomy, improved surgical reproducibility and prosthetic performance, and a reduction in complications. The techniques described in the book aim to reproduce patients’ native anatomy and physiological joint laxity, thereby improving the prosthetic hip/knee kinematics and functional outcomes in the quest of the forgotten joint. They include kinematically aligned total knee/total hip arthroplasty, partial knee replacement, and hip resurfacing. The relevance of available and emerging technological tools for these personalized approaches is also explained, with coverage of, for example, robotics, computer-assisted surgery, and augmented reality. Contributions from surgeons who are considered world leaders in diverse fields of this novel surgical philosophy make this open access book will invaluable to a wide readership, from trainees at all levels to consultants practicing lower limb surgery
Download or read book Bone Stress Injuries written by Adam S. Tenforde, MD and published by Springer Publishing Company. This book was released on 2021-07-17 with total page 219 pages. Available in PDF, EPUB and Kindle. Book excerpt: “This book gives a nice summary of the current state of diagnosis, treatment, and prevention of bone stress injuries. It is particularly useful for sports medicine fellows and residents with an interest in athletes and active patients." ---Doody's Review Service, 3 stars Bone stress injuries are commonly seen in athletes and active individuals across a full spectrum of physical activity, age, and gender. While most overuse injuries can be addressed through non-operative care, injuries may progress to full fractures that require surgery if misdiagnosed or not correctly managed. Written by leaders in sports medicine including physical medicine and rehabilitation, orthopaedics, endocrinology and allied health professionals of biomechanics, physical therapy and dietetics, Bone Stress Injuries offers state-of-the-art guidelines and up-to-date science and terminology to practitioners. Using a holistic approach to understand the management of bone stress injuries, this book highlights specific considerations by injury, gender, and risk factor to ensure that a comprehensive treatment plan can be developed to optimize bone health, neuromuscular re-education, gait mechanics, and injury prevention. Organized into four parts, opening chapters cover the general need-to-know topics, including clinical history, imaging, and risk factors including biological and biomechanical factors. The book proceeds anatomically through the body from upper extremity to foot and ankle injuries, with each chapter underscoring diagnostic and treatment strategies specific to that region. Chapters dedicated to special populations discuss the differences in injury evaluation and management according to age, gender, and military background. Final chapters review the prevention of injuries and examine both common and novel treatment strategies, such as medications, nutrition, gait retraining, orthobiologics, and other interventions. Invaluable in its scope and approach, Bone Stress Injuries is the go-to resource for sports medicine physicians, physiatrists, and primary care providers who manage the care of athletes and individuals leading active lifestyles. Key Features: Promotes evidence-based practice for diagnosis, treatment, and prevention of bone stress injuries Covers specific anatomy that is prone to bone stress injuries with dedicated chapters on upper and lower extremities, pelvis and hip, spine, and foot and ankle Considers evaluation and management differences according to specific populations of pediatric, male, female, and military personnel Discusses emerging strategies to treat bone stress injuries, such as gait retraining, orthobiologics, and other non-pharmacological treatments
Download or read book Skeletal Trauma Analysis written by Nicholas V. Passalacqua and published by John Wiley & Sons. This book was released on 2015-04-27 with total page 311 pages. Available in PDF, EPUB and Kindle. Book excerpt: In the post-Daubert era, forensic science disciplines are increasingly informed by robust, statistically-sound experimental research. The educational value of the well-documented case study, however, remains as important as ever. Emphasizing known contextual information, this volume serves as a case-driven guide to skeletal trauma analysis through the unique perspective of each chapter's authors. Both forensic anthropologists and pathologists contribute skeletal trauma cases covering a range of topics including child abuse, blunt force trauma, descents from height, plane crashes, sharp force trauma and dismemberment, gunshot wounds, blast trauma, and burned body interpretation. Several chapters also include a discussion of potentially confounding taphonomic influences such as animal scavenging, water immersion, burning, and extended postmortem intervals. Detailed descriptions with multiple supporting images allow the practitioner's skeletal trauma interpretation to be compared to the "answer" as it pertains to the known circumstances surrounding the traumatic events of each case.
