Download or read book Understanding Mechanism of Non contact Anterior Cruciate Ligament ACL Injuries written by Matthew J. Kivell and published by . This book was released on 2016 with total page 95 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Non contact ACL Injuries During Landing written by Ata Kiapour and published by . This book was released on 2013 with total page 312 pages. Available in PDF, EPUB and Kindle. Book excerpt: The anterior cruciate ligament (ACL) is one of the most common sites of the injury in the knee joint. Over 120,000 ACL injuries occur annually in the United States, mainly affecting the young athletic population with females at a reported 2-8 fold greater risk than males. Non-contact injuries constitute the predominant mechanism of ACL injury (in over 70% of ACL injuries) occur mainly during landing following a jump and lateral cutting maneuvers. Due to long term disabilities associated with ACL injury (i.e. joint instability, pain and early development of osteoarthritis), potential loss of sports participation and high costs associated with surgical reconstruction, prevention is an appealing option to avoid the complications associated with ACL injury. While many advances have been made in terms of surgical and rehabilitation interventions, patients who have suffered ACL injury face long-term consequences that include lowered activity levels, 10-25 % incidence of re-injury 5 years after return to sport and 50-100 % incidence of osteoarthritis within 10-15 years of injury, regardless of the treatment. Despite the substantial effort conducted on investigation of the non-contact ACL injuries, the mechanism of these injuries is not well understood. Many proposed risk factors can be categorized as anatomic, neuromuscular or biomechanical. However, just biomechanical and neuromuscular risk factors can be defined as modifiable factors, which can be modified through targeted intervention strategies in an effort to reduce the risk of injury. Identification of modifiable risk factors for ACL injury represents a major step in the reduction of the incidence of injury. A better understanding of the mechanisms underlying non-contact ACL injuries and associated risk factors, might serve to improve current prevention strategies and decrease the risk of early-onset knee osteoarthritis. This proposal aims to employ a unique combination of established ex vivo and in silico methods in order to gain an in depth understanding of knee joint biomechanics during dynamic landing (as an identified high-risk task) with a specific focus on ACL injury. The objectives of this dissertation were to investigate the non-contact ACL injury during landing in an effort to identify the potential biomechanical and neuromuscular risk factors and determine the mechanisms that lead to these injuries. Cadaveric experiments were conducted on 20 normal, relatively young instrumented lower extremities. Following knee arthrometry, specimens were tested under a wide range of quasi-static single- and multi-axial loading conditions in order to quantify the global the biomechanical response of the tibiofemoral joint with regards to joint kinematics, ACL and MCL strains, and intra-articular cartilage pressure distribution. Subsequently, multiple bi-pedal and uni-pedal landing scenarios were simulated using a custom designed novel drop-stand. An extensive physiologic loading protocol was designed based on the identified high-risk loading factors from quasi-static characterization to simulated a wide range of landing scenarios. The findings of these cadaveric experiments were suggested the anterior tibial shear force, knee abduction moment and internal tibial rotation moment as the most critical biomechanical risk factors for the non-contact ACL injury during landing. Results further suggested the multi-planar loading condition consists of all three identified biomechanical risk factors as the most probable mechanism for non-contact ACL injuries. Findings finally highlighted the importance of dynamic knee valgus collapse as a primary factor contributing to these injuries (Specific Aim I). In addition to cadaveric experiments, a detailed anatomic non-linear finite element (FE) model of the lower extremity was developed from imaging data of a healthy, young female athlete. The developed model includes bony and soft tissue structures of the knee joint such as major ligaments, trans-knee muscles, articular cartilage and menisci. The model was then extensively validated against cadaveric measurements of joint kinematics, ligament strains and cartilage pressure distribution under a wide range of static, quasi-static and dynamic loading conditions. A comprehensive FE parametric study was conducted in order to investigate the effect of trans-knee muscle loads on knee joint biomechanics and risk of ACL injury. The findings in combination with ex vivo data resulted in identification of the anterior-posterior and medial-lateral muscle force imbalances as the potential neuromuscular risk factors lead to high ACL strains and high risk of ACL injury (Specific Aim II). The developed FE model was further used to help better interpret the experimental findings in an effort to identify ACL injury biomechanical risk factors and associated mechanism (Specific Aim I). Finally a novel framework was developed in order to customize the validated generalized FE model based on the structural properties of ACL and critical tibiofermoral anatomic factors. The customized models were then validated based subject-specific ACL strain data obtained ex vivo. It was shown that the customized models using the proposed approach lead to more realistic FE-predicted ACL strain compared to the generalized FE model. Findings suggested that this novel, validated framework can be used as a critical risk-screening tool in the large-scale clinical assessment of ACL injury risk among individuals (Specific Aim III).

Download or read book Understanding and Preventing Noncontact ACL Injuries written by American Orthopaedic Society for Sports Medicine and published by Human Kinetics Publishers. This book was released on 2007 with total page 315 pages. Available in PDF, EPUB and Kindle. Book excerpt: Grade level: 11, 12, i, s, t.

Download or read book Understanding and Preventing Noncontact ACL Injuries written by and published by Human Kinetics. This book was released on with total page 352 pages. Available in PDF, EPUB and Kindle. Book excerpt: Grade level: 11, 12, i, s, t.

Download or read book Prevention of Noncontact ACL Injuries written by Letha Y. Griffin and published by Academy. This book was released on 2001 with total page 140 pages. Available in PDF, EPUB and Kindle. Book excerpt: This important work will help you understand: the epidemiology of noncontact ACL injuries; risk factors for injuries; the "at-risk" athlete; neuromuscular prevention programs; their influence on injury rates. Supported by the American Orthopaedic Society for Sports Medicine, the National Athletic Trainers Association Research and Education Foundation, the National Collegiate Athletic Association, and the Orthopaedic Research and Education Foundation.

Download or read book Anterior Cruciate Ligament Injury Mechanisms in Female Athletes written by Carmen E. Quatman and published by . This book was released on 2009 with total page 144 pages. Available in PDF, EPUB and Kindle. Book excerpt: The anterior cruciate ligament (ACL) is one of the most commonly injured ligaments of the knee, with female athletes sustaining ACL injuries at a 2-8 fold greater rate compared to male athletes. An ACL injury can be devastating and significantly increases the athlete's risk for osteoarthritis long term. While many advances have been made in terms of surgical and rehabilitation treatments for ACL injured patients, long term outcome studies show that these patients are at a high risk for developing knee osteoarthritis 10-15 years after ACL injury, regardless of the treatment. Currently, the mechanism of non-contact ACL injury is not well understood. In order to design successful ACL injury prevention programs and address the high rates of ACL injuries in the female athlete population, a better understanding of the non-contact ACL injury mechanism must be established. Utilizing a new interdisciplinary, multi-faceted approach to study ACL loading and injury mechanisms in female athletes, we explored the mechanical responses of the ACL to loads using computer mathematical modeling and three-dimensional motion analysis techniques. The computer model developed for this project is a valuable tool that can be readily manipulated to examine knee joint motions and loads and may be utilized as a tool to predict which athletes are at high risk of ACL injury. Prevention of even a portion of these ACL injuries would allow many athletes to receive the health benefits of sports participation and avoid the long term sequelae of disability associated with knee osteoarthritis.

Download or read book The Anterior Cruciate Ligament Reconstruction and Basic Science E Book written by Chadwick Prodromos and published by Elsevier Health Sciences. This book was released on 2007-12-27 with total page 671 pages. Available in PDF, EPUB and Kindle. Book excerpt: Master the very latest clinical and technical information on the full range of anterior cruciate ligament reconstruction techniques. Both inside the remarkably user-friendly printed version of this Expert Consult title and on its fully searchable web site, you'll find detailed coverage of hamstring, allograft and bone-tendon-bone (BTB) ACL reconstruction (including single versus double bundle techniques), and hamstring graft harvesting; plus fixation devices, rehabilitation, revision ACLR surgery, and much more! A "dream team" of ACL surgeons provides the advanced guidance you need to overcome the toughest challenges in this area. A comparison of the full range of graft options for ACL reconstruction makes it easier to choose the best approach for each patient. State-of-the-art information on the latest principles and technical considerations helps you avoid complications. ‘How to' principles of post-op rehabilitation and revision ACL surgery optimize patient outcome. Access to the full contents of the book online enables you to consult it from any computer and perform rapid searches. Also available in an upgradeable premium online version including fully searchable text PLUS timely updates.

Download or read book ACL Injuries in Female Athletes written by Robin West and published by Elsevier Health Sciences. This book was released on 2018-12-07 with total page 400 pages. Available in PDF, EPUB and Kindle. Book excerpt: This easy-to-read reference presents a succinct overview of clinically-focused topics covering the prevention, treatment, and rehabilitation of ACL injuries in the female athlete. Written by two professional team physicians, it provides practical, focused information for orthopaedic and sports medicine surgeons and physicians. Covers ACL injury risk factors and prevention, including biomechanics, biology, and anatomy of the female athlete. Discusses graft choices, the biology of healing, rehabilitation and return to play, future options for treatment, and more. Addresses special considerations such as pediatric ACL and revision ACL. Consolidates today’s available information and experience in this timely area into one convenient resource.

Download or read book The Multiple Ligament Injured Knee written by Gregory C. Fanelli and published by Springer Science & Business Media. This book was released on 2012-08-16 with total page 469 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Multiple Ligament Injured Knee: A Practical Guide to Management includes the most developed knowledge needed to successfully diagnose and treat knee ligament injuries. This thorough work presents anterior and posterior cruciate and collateral ligament anatomy and biomechanics along with non-invasive methods for diagnosing the extent of injury, such as radiographic and arthroscopic evaluation. Various injuries are discussed in addition to useful treatment techniques, including arthroscopic reconstruction, posterolateral and posteromedial corner injury and treatment, assessment and treatment of vascular injuries, assessment and treatment of nerve injuries, rehabilitation, and post-operative results. Each of these clearly written chapters is accompanied by a wealth of line drawings and photographs that demonstrate both the surgical and non-surgical approaches to examination and treatment.

Download or read book Mechanism and Prevention of Anterior Cruciate Ligament Injuries in Sport written by Cyril J. Donnelly and published by . This book was released on 2012 with total page 278 pages. Available in PDF, EPUB and Kindle. Book excerpt: Review of the anterior cruciate ligament (ACL) injury prevention literature has shown that exercise/training can be used to reduce ACL injury risk and injury rates in general athletic populations. However, a large gap still exists in the literature, with little to no research testing the effectiveness of these prophylactic training protocols in community level training environments. Results from this thesis have shown that when prophylactic training protocols were implemented in community level training environments; they were not effective in reducing surrogate biomechanical measures of ACL injury risk like peak knee joint loading and muscular support. We must begin to better understand the biomechanical mechanisms by which prophylactic training protocols act if we can more effectively translate positive laboratory based findings to community level training environments. To identify these causal mechanisms, we have developed a novel computational method capable of identifying causal links between an athlete's whole-body kinematics and knee joint kinetics during dynamic simulations of human movement. The generalised kinematic strategy identified during sidestepping, where one half of non-contact ACL injuries have been shown to occur was to reposition an athlete's whole-body centre of mass medially, towards their desired direction of travel. Through the development and use of these methods, the ability to identify short, concise and effective training protocols is possible; increasing the probability of translating ACL focused research into injury prevention practice in community level training environments.

Download or read book Knee Injuries and Repair written by Jenna Goodwin and published by Nova Science Publishers. This book was released on 2016 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Injury to the anterior cruciate ligament (ACL) is common and typically affects young individuals; in particular, girls have higher rates of sustaining non-contact ACL injuries than boys when they engage in sports that involve jumping, pivoting, and changing direction. Multiple intrinsic and extrinsic risk factors for ACL injury have been identified, including anatomic variations, neuromuscular deficits, hormonal status and other related factors. Despite a lack of scientifically validated and published guidelines to help clinicians decide between conservative and surgical treatment, patient-specific criteria, such as age, pain, recurrent joint instability, desired level of activity, occupation and presence of potential concomitant injuries, should be considered. Neuromuscular training can reduce the risk of ACL injury, especially when combined with other strength training exercises. Chapter One in this book outlines the current state of knowledge regarding the risk factors, treatment and prevention of ACL injuries. Chapter Two provides is a better understanding of what associated factors are identified following ACL tear and explore the current understanding of the impact these have on treatment and subsequent outcome. The final chapter discusses surgical and rehabilitation concepts of matrix-induced autologous chondrocyte implantation in the treatment of knee articular cartilage defects.

Download or read book Sports Injuries written by Mahmut Nedim Doral and published by Springer Nature. This book was released on 2015-06-29 with total page 3295 pages. Available in PDF, EPUB and Kindle. Book excerpt: Sports Injuries: Prevention, Diagnosis, Treatment and Rehabilitation covers the whole field of sports injuries and is an up-to-date guide for the diagnosis and treatment of the full range of sports injuries. The work pays detailed attention to biomechanics and injury prevention, examines the emerging treatment role of current strategies and evaluates sports injuries of each part of musculoskeletal system. In addition, pediatric sports injuries, extreme sports injuries, the role of physiotherapy, and future developments are extensively discussed. All those who are involved in the care of patients with sports injuries will find this textbook to be an invaluable, comprehensive, and up-to-date reference.

Download or read book Understanding and Preventing Noncontact ACL Injuries written by Timothy E. Hewett and published by . This book was released on 2014-07-01 with total page 346 pages. Available in PDF, EPUB and Kindle. Book excerpt: With more than 200,000 athletes each year suffering injury to the anterior cruciate ligament (ACL) of the knee, "Understanding and Preventing Noncontact ACL Injuries" provides an authoritative description of the biomechanical, clinical, and injury factors pertinent to the athletes--primarily girls and young women--who experience this problem.

Download or read book Predicting Risk Factors of Non Contact Anterior Cruciate Ligament Injuries During Single Leg Landing written by Ali Nicholas and published by . This book was released on 2015 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: The literature suggests that body kinematics and musculoskeletal differences are major factors contributing to the high disparity in non-contact Anterior Cruciate Ligament (ACL) injury rate between genders. The literature also indicates that the incidence of non-contact ACL injury predominates during single-leg landing sports such as basketball, soccer, and handball. Despite this, there are few studies investigating kinematics or musculoskeletal differences between genders during single-leg landing from increasing vertical heights and horizontal distances. The objectives of this study are threefold: first, conduct a gap study identifying the barriers to predicting mechanisms and risk factors for non-contact ACL injury. Second, propose a new approach that can address some of the challenges encountered in some existing non-contact ACL injury study approaches. Finally, whilst determining whether or not gender differences explain the higher rate of ACL injuries among females, identify and correlate the biomechanical and musculoskeletal variables significantly impacted by gender, vertical landing height, and/or horizontal landing distance and their interactions to various ACL injury risk predictor variables during single-leg landing. Experiments using male and female subjects, inverse dynamics analysis using Visual3D, and musculoskeletal modeling simulation using AnyBody Modeling System were approaches used to explore these objectives. Salient findings from this dissertation includes but are not limited to, non-contact ACL injury that occurs during single-leg landing is mutifaceted entailing many factors that cannot be captured in any one existing ACL injury study approach. Non-contact ACL injury during single-leg landing may not be gender specific. Both vertical height and horizontal distance of landing increase the risk of non-contact ACL injury during single-leg landing. Body kinematics during single-leg landing may not be the sole determinant in attenuating ground reaction forces and consequently risk of ACL injury. The hamstring and gastrocnemius muscles were determined to strain shield the ACL while the quadriceps were found to have no significant effect on risk of ACL injury during single-leg landing. Within the findings and limitations of this study the knowledge garnered from this research may aid in tailoring future studies so as to enable more robust non-contact ACL injury prevention protocols.

Download or read book Comprehensive Insights into ACL Injuries Unveiling Holistic Approaches to Recovery written by Dr. Spineanu Eugenia and published by Dr. Spineanu Eugenia. This book was released on 2024-07-01 with total page 130 pages. Available in PDF, EPUB and Kindle. Book excerpt: "Comprehensive Insights into ACL Injuries: Unveiling Holistic Approaches to Recovery" presents a comprehensive exploration of anterior cruciate ligament (ACL) injuries, delving deep into the multifaceted aspects of this prevalent orthopedic issue. This treatise offers an extensive examination of the injury's definition, historical context, incidence, and risk factors, providing an in-depth understanding of its prevalence and causes. Readers will embark on a detailed anatomical journey, unraveling the intricate structures of the knee joint, exploring the complexities of ligaments, tendons, muscles, and synovial structures, leading to a focused exploration of the ACL's structure, composition, biomechanics, and role in knee stability. The treatise meticulously dissects the mechanisms of ACL injury, distinguishing between traumatic and non-traumatic causes while delving into the cellular and molecular changes, biochemical responses, inflammatory processes, and healing mechanisms associated with these injuries.

Download or read book ACL Injury and Its Treatment written by Mitsuo Ochi and published by Springer. This book was released on 2016-06-30 with total page 546 pages. Available in PDF, EPUB and Kindle. Book excerpt: This volume presents detailed information on surgically relevant anatomy and histology of the anterior cruciate ligament (ACL), biomechanics, diagnostics, and ACL reconstruction. In light of the growing body of evidence demonstrating the advantages of anatomic ACL reconstruction over traditional methods, there are also discussions of single anteromedial bundle reconstruction and anatomic ACL reconstruction with abundant descriptions of experimental and clinical studies. In addition, particular attention is given not only to techniques such as ACL augmentation, bone-patella tendon-bone reconstruction and computer-assisted navigation, but it also presents expert analysis of revision of ACL reconstruction, complications, and the future perspectives of ACL reconstruction. Edited by authoritative orthopedic surgeon from the Japanese Orthopaedic Society of Knee, Arthroscopy and Sports Medicine (JOSKAS), this book provides up-to-date information for orthopedic surgeons and physical therapists specializing in the ACL. The research evidence will broaden readers’ understanding and enable them to optimize outcomes for patients. As ACL rupture is a common injury especially for high-level athletes, it will also attract sports trainers and team physicians who are interested in a recent update on this field.

Download or read book The Knee Joint written by Michel Bonnin and published by Springer Science & Business Media. This book was released on 2013-07-04 with total page 1027 pages. Available in PDF, EPUB and Kindle. Book excerpt: Pushed by the progress of biology, technology and biomechanics, knee surgery has dramatically evolved in the last decades. This book is a "state of the art" concerning all aspects of knee surgery from ligament reconstruction to Total Knee Arthroplasty. An international panel of renowned authors have worked on this didactic fully illustrated book. It will help young surgeons to understand basic sciences and modern sugical techniques. The experienced surgeon will find help to deal with difficult cases and clarifications in recent technologic advances such as cartilage surgery, navigation and mini invasive surgery.