Download or read book Mobility and Contact Mechanics of a Rotating Platform Total Knee Replacement written by Jason K. Otto and published by . This book was released on 2012 with total page 13 pages. Available in PDF, EPUB and Kindle. Book excerpt: Despite their increasing clinical usage, mobile-bearing total knee replacements have not been well characterized biomechanically. An experimental and finite element analysis was done to asses the mobility and contact mechanics of a widely used rotating platform total knee replacement. Parameters that varied were axial load, condylar load allocation, flexion angle, and static versus dynamic loading. Similar results from the physical model and finite element model lend credence to the validity of the findings. The torque required to initiate rotation (static torque) was greater than that to sustain rotation (dynamic torque). At four times body weight axial load, peak resisting torque measured was 9.47 ± 0.61 and 5.51 ± 0.38 N-m, for static and dynamic torque, respectively. A 60-40 condylar load allocation produced slightly less resisting torque than the 50-50 load. For all practical purposes, the polyethylene insert rotated simultaneously with the femoral component, leading to maintenance of high contact area, desirable behavior clinically. Walking cycle simulations produced a total axial rotation range of motion of 6°. The high frictional torques observed at the mobile interface may explain why a percentage of these mobile-bearings fail to rotate under routine functional load.
Download or read book Mobility and Contact Mechanics of Rotating Platform Total Knee Replacements written by Jason Karl Otto and published by . This book was released on 2001 with total page 284 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Insall Scott Surgery of the Knee E Book written by W. Norman Scott and published by Elsevier Health Sciences. This book was released on 2017-02-10 with total page 2758 pages. Available in PDF, EPUB and Kindle. Book excerpt: Insall & Scott Surgery of the Knee by Dr. W. Norman Scott remains the definitive choice for guidance on the most effective approaches for the diagnosis and management of the entire scope of knee disorders. This edition reflects a complete content overhaul, with more than 50 new chapters and over 400 contributors from around the world. The video program includes 70 new video clips, while new and expanded material covers a range of hot topics, including same-day surgery and hospital management of knee arthroplasty patients and anesthesia specific for knee surgery. Extensive visual elements and video program include nearly 70 new videos -- over 230 in total – as well as a Glossary of Implants featuring 160 demonstrative pictures. Over 50 new chapters and brand-new sections on Same Day Surgery and Hospital Management of Knee Arthroplasty Patients; Quality and Payment Paradigms for TKA; Anesthesia Specific for Knee Surgery; and Preoperative Assessment, Perioperative Management, and Postoperative Pain Control. An expanded Adult Reconstruction Section informs readers about Enhanced Primary Revision and the treatment of Peri-prosthetic fractures in TKA. Includes enhanced worldwide approaches for all aspects of disorders of the knee from nearly 400 contributors worldwide. Boasts updated pediatric knee considerations and updated tumor surgery principles for the treatment of tumors about the knee. Expert Consult eBook version included with purchase. This enhanced eBook experience allows you to search all of the text, figures, images, videos (including video updates), glossary, and references from the book on a variety of devices.
Download or read book Total Knee Arthroplasty written by Johan Bellemans and published by Springer Science & Business Media. This book was released on 2005-08-01 with total page 414 pages. Available in PDF, EPUB and Kindle. Book excerpt: "Take away my knee pain and give me better motion". This is what the arthritic patient expects from a Total Knee Arthroplasty (TKA). By virtue of standardization of the TKA procedure, surgeons can nowadays solve the pain issue for the majority of the patients. Restoration of function is a goal of a different order and forms the scope of this book. The editors confronted today's leading knee surgeons with the limitations of current surgical techniques and technology. They challenged them to define new thresholds of functional capacity after Total Knee Arthroplasty. "A Guide to Get Better Performance in TKA" describes the cutting edge in surgical techniques, prosthetic design and achievement of excellent function for these patients.
Download or read book MICCAI 2005 written by James Duncan and published by Springer Science & Business Media. This book was released on 2005-10-11 with total page 981 pages. Available in PDF, EPUB and Kindle. Book excerpt: The two-volume set LNCS 3749 and LNCS 3750 constitutes the refereed proceedings of the 8th International Conference on Medical Image Computing and Computer-Assisted Intervention, MICCAI 2005, held in Palm Springs, CA, USA, in October 2005. Based on rigorous peer reviews the program committee selected 237 carefully revised full papers from 632 submissions for presentation in two volumes. The first volume includes all the contributions related to image analysis and validation, vascular image segmentation, image registration, diffusion tensor image analysis, image segmentation and analysis, clinical applications - validation, imaging systems - visualization, computer assisted diagnosis, cellular and molecular image analysis, physically-based modeling, robotics and intervention, medical image computing for clinical applications, and biological imaging - simulation and modeling. The second volume collects the papers related to robotics, image-guided surgery and interventions, image registration, medical image computing , structural and functional brain analysis, model-based image analysis, image-guided intervention: simulation, modeling and display, and image segmentation and analysis.
Download or read book Determination of the Dynamic Tibiofemoral Contact Mechanics in a Total Knee Replacement written by Lisa Marie Gustafson and published by . This book was released on 2004 with total page 400 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Total Knee Replacement Trends written by Marya and published by Elsevier India. This book was released on 2009 with total page 144 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book LCS Mobile Bearing Knee Arthroplasty written by Karel J. Hamelynck and published by Springer. This book was released on 2002-10-04 with total page 400 pages. Available in PDF, EPUB and Kindle. Book excerpt: Worldwide experience with the Lcs• mobile bearing total knee prosthesis has been unpar alleled both in terms of enduring popularity and outstanding long-term clinical results. Buechel and Pappas's design was based on the principles of; restoring anatomical joint function to as near normal as possible, minimising contact stresses to avoid wear and darn age to the bearing surfaces. and finally the idea that constraint should refiect the need for mobility, to avoid shear stresses and loosening of the implant. In 1977, the LCS® knee was implanted by Dr. Frederick Buechel. This was the first mobile bearing, tri-compartmental knee implant. This was also the first to successfully address the key issues ofloosening, wear and patello-femoral problems associated with earlier designs. The unique design solution was the creation of a common articulating geometry for the tibia and patella on the distal femoral surface. This resulted in a tibial and patellar articulation that was mobile in nature, but with an identical radius of curvature and conformity. The mobile bearing concept was considered sufficiently novel and unproven that the US FDA (Food & Drug Administration) required that it be validated in an Investigational Device Evaluation (IDE). An FDA IDE study involving 25 US surgeons was initiated in 1981. Validation of the clinical success of the device in this study resulted in FDA approval of the LCS, Knee (for cemented, tri-compartmental use) in 1985.
Download or read book Index Medicus written by and published by . This book was released on 2002 with total page 1732 pages. Available in PDF, EPUB and Kindle. Book excerpt: Vols. for 1963- include as pt. 2 of the Jan. issue: Medical subject headings.
Download or read book Principles of Human Joint Replacement written by Frederick F. Buechel and published by Springer. This book was released on 2015-03-12 with total page 442 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book is written for the users and designers of joint replacements. In its second extended edition it conveys to the reader the knowledge accumulated by the authors during their forty year effort on the development of replacement devices for the lower limb for the purpose of aiding the reader in their design and evaluation of joint replacement devices. The early chapters describe the engineering, scientific and medical principles needed for replacement joint evaluation. One must understand the nature and performance of the materials involved and their characteristics in vivo, i.e. the response of the body to implant materials. It is also essential to understand the response of the implants to applied loading and motion, particularly in the hostile physiological environment. A chapter describes the design methodology now required for joint replacement in the USA and EU countries. The remaining chapters provide a history of joint replacement, an evaluation of earlier and current devices and sample case histories of some of the authors’ devices. The present second edition includes various additional case reports as well as a new chapter devoted to the shoulder. Drs. Buechel, an orthopaedic surgeon, and Pappas, a professor of Mechanical Engineering, are the designers of several successful joint replacement systems. The most well-known of these is the pioneering LCS knee replacement.
Download or read book Journal of Biomechanical Engineering written by and published by . This book was released on 2005 with total page 688 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Total Knee Arthroplasty written by E. Carlos Rodríguez-Merchán and published by Springer. This book was released on 2015-06-15 with total page 278 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book offers a comprehensive guide to total knee arthroplasty (TKA) that will assist in achieving excellent outcomes based on a sound understanding and technique. After an introductory section on the native knee that covers the anatomy, physiology, biomechanics, and patterns of disease, all aspects of primary knee arthroplasty are discussed in detail. Individual chapters are devoted to topics such as acute pain management, the role of technological aids, prosthetic kinematics, alignment targets, unicompartmental arthroplasty, patellar resurfacing, outcome measures, and cost-effectiveness. An extensive section explains the causes and management of potential complications, including aseptic failure, infections, and periprosthetic fracture. The surgical techniques appropriate for revision knee arthroplasty are described separately, and guidelines on how to deal with bone loss, instability, and extensor mechanism failure are provided. The authors are all respected experts from the United Kingdom, United States, Australia and Europe.
Download or read book LCS Mobile Bearing Knee Arthroplasty written by Karel J. Hamelynck and published by Springer. This book was released on 2014-08-23 with total page 371 pages. Available in PDF, EPUB and Kindle. Book excerpt: Worldwide experience with the Lcs• mobile bearing total knee prosthesis has been unpar alleled both in terms of enduring popularity and outstanding long-term clinical results. Buechel and Pappas's design was based on the principles of; restoring anatomical joint function to as near normal as possible, minimising contact stresses to avoid wear and darn age to the bearing surfaces. and finally the idea that constraint should refiect the need for mobility, to avoid shear stresses and loosening of the implant. In 1977, the LCS® knee was implanted by Dr. Frederick Buechel. This was the first mobile bearing, tri-compartmental knee implant. This was also the first to successfully address the key issues ofloosening, wear and patello-femoral problems associated with earlier designs. The unique design solution was the creation of a common articulating geometry for the tibia and patella on the distal femoral surface. This resulted in a tibial and patellar articulation that was mobile in nature, but with an identical radius of curvature and conformity. The mobile bearing concept was considered sufficiently novel and unproven that the US FDA (Food & Drug Administration) required that it be validated in an Investigational Device Evaluation (IDE). An FDA IDE study involving 25 US surgeons was initiated in 1981. Validation of the clinical success of the device in this study resulted in FDA approval of the LCS, Knee (for cemented, tri-compartmental use) in 1985.
Download or read book Total Knee Replacement written by A. A. Savastano and published by . This book was released on 1980 with total page 262 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book LCS Mobile Bearing Knee Arthroplasty written by Karel J. Hamelynck and published by Springer Science & Business Media. This book was released on 2013-11-11 with total page 374 pages. Available in PDF, EPUB and Kindle. Book excerpt: Worldwide experience with the Lcs• mobile bearing total knee prosthesis has been unpar alleled both in terms of enduring popularity and outstanding long-term clinical results. Buechel and Pappas's design was based on the principles of; restoring anatomical joint function to as near normal as possible, minimising contact stresses to avoid wear and darn age to the bearing surfaces. and finally the idea that constraint should refiect the need for mobility, to avoid shear stresses and loosening of the implant. In 1977, the LCS® knee was implanted by Dr. Frederick Buechel. This was the first mobile bearing, tri-compartmental knee implant. This was also the first to successfully address the key issues ofloosening, wear and patello-femoral problems associated with earlier designs. The unique design solution was the creation of a common articulating geometry for the tibia and patella on the distal femoral surface. This resulted in a tibial and patellar articulation that was mobile in nature, but with an identical radius of curvature and conformity. The mobile bearing concept was considered sufficiently novel and unproven that the US FDA (Food & Drug Administration) required that it be validated in an Investigational Device Evaluation (IDE). An FDA IDE study involving 25 US surgeons was initiated in 1981. Validation of the clinical success of the device in this study resulted in FDA approval of the LCS, Knee (for cemented, tri-compartmental use) in 1985.
Download or read book Total Knee Arthroplasty E Book written by Richard D. Scott and published by Elsevier Health Sciences. This book was released on 2014-08-26 with total page 195 pages. Available in PDF, EPUB and Kindle. Book excerpt: Learn the latest innovations and techniques of one of the most performed procedures in the world with Total Knee Arthroplasty. Dr. Richard Scott, co-designer of the Total Knee System, brings his years of experience to each clinical challenge, walking you through myriad scenarios and highlighting the pearls and pitfalls he experienced himself along the way. This single-author format lends a consistent, authoritative voice to this medical reference book. Regularly consult this expansive reference with topics of interest to surgeons of all levels of experience. Quickly find pertinent information with a user-friendly index and hundreds of detailed, full-color illustrations. Explore in-depth topics covering all facets of knee replacement, both operative and nonoperative, to restore function to diseased knee joints. Comprehend complex methods through an easy-to-access procedure-based format that includes tips on what surgeons should avoid in every situation. Take advantage of Dr. Scott's expert guidance in the design and technique of PCL retaining TKA and Unicompartmental knee arthroplasty. Access frequently asked questions concerning total knee arthroplasty. Consult this title on your favorite e-reader, conduct rapid searches, and adjust font sizes for optimal readability.
Download or read book Development of a Computational Model to Predict the in Vivo Contact Mechanics of Modern Total Knee Arthroplasty written by Adrija Sharma and published by . This book was released on 2008 with total page 159 pages. Available in PDF, EPUB and Kindle. Book excerpt: This dissertation focuses on the development of a computationally efficient and fast method that incorporates the kinematics obtained from fluoroscopy and extends it to the prediction of the in-vivo contact mechanics at the femoro-tibial articulation in modern knee implants for the deep knee bend activity. In this endeavor, this dissertation deals with the use of an inverse dynamic rigid body model characterizing the slip and roll behavior observed in the femoro-polyethylene articulation and a coupled deformation model where the polyethylene in knee implants are modeled as hexahedral discrete element networks. The performance of this method is tested by comparing force predictions from a telemetric knee and finite element analysis. Finally, the method is applied to study the in vivo contact mechanics and mechanics of the quadriceps mechanism in six popular knee designs. During the deep knee bend activity, the contact force generally increased with flexion. However, the medial lateral forces were not equally distributed and the medial lateral force distribution generally varied from 60%- 40% at full extension to as high as 75%-25% at full flexion in some patients. Also, the magnitude of axial force in the superior-inferior direction was the highest and was found to contribute around 98%-99% of the total load acting at the femorotibial joint. The forces in the medio-lateral and antero-posterior directions were low and the maximum magnitude observed was around 0.5BW. The contact areas and contact pressures were much more sensitive to the geometries involved and the in vivo kinematics. Though no definite pattern was observed for the variation of the contact areas throughout flexion, the contact pressures increased in both condyles with increasing flexion. Also, the contact pressures on the medial condyle were higher than the contact pressures observed in the lateral condyle. The patellofemoral and the quadriceps force ratio increased with the increase in flexion while the patellar ligament and the quadriceps force ratio decreased with increasing flexion. In some patients at high flexion, the quadriceps force and as a result the patellofemoral, patellar ligament and the knee contact forces were found to decrease due to the wrapping of the quadriceps coupled with posterior movement of the femoral condyles leading to the increase in the quadriceps moment arm.
