Download or read book Design of compliant ankle orthoses for fabrication by selective laser sintering written by Nehal Sardar Rahim and published by . This book was released on 2000 with total page 158 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Design and Fabrication of Ankle foot Orthoses Through 3D Scanning and Rapid Prototyping written by Engku Ersyad Engku Abas and published by . This book was released on 2013 with total page 40 pages. Available in PDF, EPUB and Kindle. Book excerpt: This project aims to tackle the problem of current manufacturing method of production Ankle-Foot Orthoses (AFO). AFO is needed for people who experience foot-drop, limited ability or inability to raise the foot at the ankle joint. There are two ways of acquiring these AFOs, first is by getting on the shelves, prefabricated AFO, which are affordable and designed to fit a range of patients. However, due to this features, it will not provide individualized comfort and functionality. Second method of obtaining AFO is by using traditional custom-made technique which is laborious and time-consuming manual process and can only be accomplished by expert orthotists. Nonetheless it does provide better fit and function. This research explore the possibilities of using current technology in bring the manufacturing process of AFO much faster and reliable. By using 3D scanner to obtain the geometric data of the foot, the process of fabricating patient-specific orthotic devices has the potential to deliver outstanding comfort due to the accurate polygon data. The process of designing orthoses using reverse engineering software would permit changes in the standard design to meet the exact needs of each patient. In order to test the effectiveness of the AFO made using the new modern method, gait analysis was conducted and comparison was made. It was concluded that the fabricated able to perform its intended function which is to restrict ankle motion and prevent drop-foot symptoms. The design made based on the scanned cloud point data also prove to fit excellently and comfortably on the subject's foot using velcro strap.
Download or read book Design of a compliant prosthetic socket fabricated using Selected Laser Sintering written by Sean David Stephens and published by . This book was released on 1999 with total page 338 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Additive Manufacturing Processes in Biomedical Engineering written by Atul Babbar and published by CRC Press. This book was released on 2022-07-29 with total page 266 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book covers innovative breakthroughs in additive manufacturing processes used for biomedical engineering. More and more, 3D printing is selected over traditional manufacturing processes, especially for complex designs, because of the many advantages such as fewer restrictions, better production cost savings, higher quality control, and accuracy. Current challenges and opportunities regarding material, design, cost savings, and efficiency are covered along with an outline of the most recent fabrication methods used for converting biomaterials into integrated structures that can fit best in anatomy while still obtaining the necessary architecture, mechanical reliability, biocompatibility, and anti-bacterial characteristics needed. Additional chapters will also focus on selected areas of applications such as bionics, affordable prostheses, implants, medical devices, rapid tooling, and drug delivery. Additive Manufacturing Processes in Biomedical Engineering: Advanced Fabrication Methods and Rapid Tooling Techniques acts as a first-hand reference for commercial manufacturing organizations which are mimicking tissue organs by using additive manufacturing techniques. By capturing the current trends of today’s manufacturing practices this book becomes a one-stop resource for manufacturing professionals, engineers in related disciplines, and academic researchers.
Download or read book Optimized Design and Testing of Kids Ankle Foot Orthosis A Case Study written by Harish Kumar Banga and published by GRIN Verlag. This book was released on 2019-11-20 with total page 19 pages. Available in PDF, EPUB and Kindle. Book excerpt: Technical Report from the year 2019 in the subject Engineering - Mechanical Engineering, grade: 10.00, , language: English, abstract: Ankle foot orthosis (AFO) are externally applied device that a reused to support as well as control the foot and ankle joint of patients having foot deformity. Foot drop is caused by a deficiency in the ankle joint in which results in the weakness of ankle and toe dorsiflexion. This research proposes a new approach to design and performance evaluation of AFO fabrication that utilizes modeling, simulation and analysis software (like Open Sim, Ansys Work bench & Solid work) and additive manufacturing technologies to customize the fit form to an individual. By implementing a carbon fibre strut at ankle joint the design will result in a stronger, more comfortable, more flexible AFO that can adaptively constrain ankle movement for various different activities. GAIT Analysis was performed on six patients having foot drop, from the emotion analysis system in the GAIT lab. The data from the GAIT lab was then imported into the Open Sim to create a biomechanics simulation to extract the joint angle and joint moments. These value of ankle angle and moment with & without AFO was compared with normal value. The results show a considerable effect of the use of the AFO by drop foot patients in terms of ankle angle and ankle moments. Furthermore, the muscular analysis in terms of activation and forces also suggest that the dorsiflexors are assisted by the AFO during GAIT and the activation of the plantarflexion are considerably less during the lifting of the foot of the ground.
Download or read book Modeling and fabrication of prosthetic sockets using selective laser sintering written by and published by . This book was released on 2004 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Successful rehabilitation of transtibial amputees involves effective fitting of prosthetic components. However, conventional techniques used to produce sockets with suitable characteristics are labor intensive and expensive, and depend on the work of skilled prosthetists that are relatively scarce compared to the number of transtibial amputees. Selective Laser Sintering (SLS) is a very promising technique for producing subject-specific sockets for transtibial amputee prostheses due to its inherent ability to create complex three-dimensional objects directly from digital shape information without the need for specific tooling, molds or human labor. This dissertation presents a framework for the design, analysis, manufacture and testing of SLS sockets for transtibial prostheses, including the development of a computer-aided design model of the socket with compliant features to enhance comfort, structural analysis using a Finite Element Method (FEM) model, fabrication of a functional prototype using SLS, and experimental validation of the FEM analysis. The validation involved quantifying the failing conditions of sockets manufactured using the framework during destructive tests. The experimental failure loads for the sockets were within a 3% range of the FEM results and were considered satisfactory. The specific design of orthogonally compliant features for socket was also analyzed. This process included the preliminary evaluation of design alternatives using FEM with validation through experimental measurements, definition of specific design methodology for the best alternatives, incorporation of solution within the socket and refinement of design using auxiliary features obtained through topology optimization. Finally, to investigate the structural response of the SLS socket during gait, a FEM model (acquired from Computed Tomography data of a transtibial amputee) composed of a socket, liner and residual limb under quasi-static loading derived from typical ground reaction forces was employed. Three different compliant designs were evaluated to assess their ability to locally relieve local pressure during the stance phase of gait, as well as their structural integrity to ensure safety. The design with a compliant feature consisting of spiral slots within the socket wall was determined to produce a local average relief of 65.8% in the interface pressure, reducing the peak pressure from 172 kPa to 66.4 kPa.
Download or read book Modeling and Fabrication of Prosthetic Sockets Using Selective Laser Sintering written by Mario Carneiro Faustimi and published by . This book was released on 2004 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Energy Storage and Return Prosthetic Foot Design Using Selective Laser Sintering written by Brian James South and published by . This book was released on 2008 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book 3D Printed Surrogate Lower Limb for Testing Ankle Foot Orthoses written by Alexis Thibodeau and published by . This book was released on 2021 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Traditionally, the mechanical testing of ankle-foot orthoses (AFOs) has been performed with simple limb surrogates, typically with a single axis ankle joint and rigid foot and shank components. Since many current AFO designs allow 3D motion, a surrogate lower limb (SLL) that provides anatomically similar motion in all planes is needed to enable realistic load testing and cyclic testing in a controlled manner. The aim of this thesis was to design, fabricate and test a novel SLL that provides anatomically realistic 3D foot motion, based on a consensus of the passive lower limb range of motion (RoM) found in the literature. The SLL design was inspired by the Rizzoli model, sectioning the lower limb into five segments (shank, hindfoot, midfoot, forefoot, toes). Ball and socket joints were used for the shank-hindfoot, hindfoot-midfoot, and midfoot-forefoot. Forefoot-toes used a hinge-type joint. 3D printed flexible thermoplastic polyurethane (TPU) snap-fit connectors connected the 3D printed nylon foot blocks. A threaded ball stud connected the shank shaft and hindfoot. This shank shaft was surrounded by a 3D printed polylactic acid (PLA) shank cover. The foot was cast in silicone rubber to emulate soft tissue, with a PLA custom mould based on a Össur prosthetic foot cover model. The SLL was successfully designed for easy fabrication using readily available techniques, materials, and components. Only the metal shaft required additional machining. 3D printed components used an affordable 3D printer (Artillery Sidewinder X1), and readily available nylon, PLA, and TPU. Using motion capture testing, SLL foot rotation angles were found to be within standard deviation of mean foot passive rotation angle ranges found in the literature, showing that most joints were within 5° of target maximum rotation angles. With load testing, the SLL was shown to survive static loads representing 1.5 times body weight for a 100 kg individuals and cyclic loads representing normal gait loading for 500,000 cycles.
Download or read book Investigation and Design of an Actively Actuated Lower limb Prosthetic Socket written by John Thomas Montgomery and published by . This book was released on 2009 with total page 186 pages. Available in PDF, EPUB and Kindle. Book excerpt: A prosthetic socket worn by an amputee must serve a wide variety of functions, from stationary support to the transfer of forces necessary to move. Fit and comfort are important factors in determining the therapeutic effectiveness of a socket. A socket that does not fit the subject well will cause movement problems and potentially long-term health issues. Because a subject's residual limb changes volume throughout the day, it is desirable that the socket adapt to accommodate volume changes to maintain fit and comfort. This thesis presents research to manufacture adaptive sockets using selective laser sintering (SLS). This additive manufacturing process allows freedom to design a socket that has both compliant areas that can adapt to changes to the residual limb, as well as rigid regions to provide necessary support for the limb. A variety of concepts are discussed that are intended for manufacture by SLS, and that feature flexible inner membranes in various configurations. For each concept the membrane will be inflated or deflated to match the limb's change in volume and the thesis also presents a study to determine SLS machine parameters for optimal build results. A series of experiments was created to understand the ability of SLS manufactured plastics to be inflated and the possible performance.
Download or read book Solid Freeform Fabrication A New Direction in Manufacturing written by J.J. Beaman and published by Springer Science & Business Media. This book was released on 2013-11-27 with total page 332 pages. Available in PDF, EPUB and Kindle. Book excerpt: Solid Freeform Fabrication is a set of manufacturing processes that are capable of producing complex freeform solid objects directly from a computer model of an object without part-specific tooling or knowledge. In essence, these methods are miniature manufacturing plants which come complete with material handling, information processing and materials processing. As such, these methods require technical knowledge from many disciplines; therefore, researchers, engineers, and students in Mechanical, Chemical, Electrical, and Manufacturing Engineering and Materials and Computer Science will all find some interest in this subject. Particular subareas of concern include manufacturing methods, polymer chemistry, computational geometry, control, heat transfer, metallurgy, ceramics, optics, and fluid mechanics. History of technology specialists may also find Chapter 1 of interest. Although this book covers the spectrum of different processes, the emphasis is clearly on the area in which the authors have the most experience, thermal laser processing. In particular, the authors have all been developers and inventors of techniques for the Selective Laser Sintering process and laser gas phase techniques (Selective Area Laser Deposition). This is a research book on the subject of Solid Freeform Fabrication.
Download or read book 3D Printing for the Radiologist E Book written by Nicole Wake and published by Elsevier Health Sciences. This book was released on 2021-05-27 with total page 244 pages. Available in PDF, EPUB and Kindle. Book excerpt: Comprehensive, yet concise, 3D Printing for the Radiologist presents an overview of three-dimensional printing at the point of care. Focusing on opportunities and challenges in radiology practice, this up-to-date reference covers computer-aided design principles, quality assurance, training, and guidance for integrating 3D printing across radiology subspecialties. Practicing and trainee radiologists, surgeons, researchers, and imaging specialists will find this an indispensable resource for furthering their understanding of the current state and future outlooks for 3D printing in clinical medicine. - Covers a wide range of topics, including basic principles of 3D printing, quality assurance, regulatory perspectives, and practical implementation in medical training and practice. - Addresses the challenges associated with 3D printing integration in clinical settings, such as reimbursement, regulatory issues, and training. - Features concise chapters from a team of multidisciplinary chapter authors, including practicing radiologists, researchers, and engineers. - Consolidates today's available information on this timely topic into a single, convenient, resource.
Download or read book Virtual and Rapid Manufacturing written by Ljubomir Tanchev and published by CRC Press. This book was released on 2007-09-17 with total page 866 pages. Available in PDF, EPUB and Kindle. Book excerpt: Collection of 120 peer-reviewed papers that were presented at the 3rd International Conference on Advanced Research in Virtual and Rapid Prototyping, held in Leiria, Portugal in September 2007. Essential reading for all those working on V&RP, focused on inducing increased collaboration between industry and academia. In addition to key
Download or read book Industrializing Additive Manufacturing Proceedings of Additive Manufacturing in Products and Applications AMPA2017 written by Mirko Meboldt and published by Springer. This book was released on 2017-09-05 with total page 363 pages. Available in PDF, EPUB and Kindle. Book excerpt: These proceedings exchange ideas and knowledge among engineers, designers and managers on how to support real-world value chains by developing additive manufactured series products. The papers from the conference show a holistic, multidisciplinary view.
Download or read book 3D Printing in Biomedical Engineering written by Sunpreet Singh and published by Springer Nature. This book was released on 2020-07-16 with total page 346 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book gives a comprehensive overview of the rapidly evolving field of three-dimensional (3D) printing, and its increasing applications in the biomedical domain. 3D printing has distinct advantages like improved quality, cost-effectiveness, and higher efficiency compared to traditional manufacturing processes. Besides these advantages, current challenges and opportunities regarding choice of material, design, and efficiency are addressed in the book. Individual chapters also focus on select areas of applications such as surgical guides, tissue regeneration, artificial scaffolds and implants, and drug delivery and release. This book will be a valuable source of information for researchers and professionals interested in the expanding biomedical applications of 3D printing.
Download or read book Advances in Engineering Materials written by Bhupendra Prakash Sharma and published by Springer Nature. This book was released on 2021-04-16 with total page 672 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book presents select proceedings of the International Conference on Future Learning Aspects of Mechanical Engineering (FLAME 2020). This book, in particular, focuses on characterizing materials using novel techniques. It covers a variety of advanced materials, viz. composites, coatings, nanomaterials, materials for fuel cells, biomaterials among others. The book also discusses advanced characterization techniques like X-ray photoelectron, UV spectroscopy, scanning electron, atomic power, transmission electron and laser confocal scanning fluorescence microscopy, and gel electrophoresis chromatography. This book gives the readers an insight into advanced material processes and characterizations with special emphasis on nanotechnology.
Download or read book 3D Printing in Medicine written by Deepak M. Kalaskar and published by Woodhead Publishing. This book was released on 2022-10-18 with total page 424 pages. Available in PDF, EPUB and Kindle. Book excerpt: 3D Printing in Medicine, Second Edition examines the rapidly growing market of 3D-printed biomaterials and their clinical applications. With a particular focus on both commercial and premarket tools, the book looks at their applications within medicine and the future outlook for the field. The chapters are written by field experts actively engaged in educational and research activities at the top universities in the world. The earlier chapters cover the fundamentals of 3D printing, including topics such as materials and hardware. The later chapters go on to cover innovative applications within medicine such as computational analysis of 3D printed constructs, personalized 3D printing - including 3D cell and organ printing and the role of AI - with a subsequent look at the applications of high-resolution printing, 3D printing in diagnostics, drug development, 4D printing, and much more. This updated new edition features completely revised content, with additional new chapters covering organs-on-chips, bioprinting regulations and standards, intellectual properties, and socio-ethical implications of organs-on-demand. - Reviews a broad range of biomedical applications of 3D printing biomaterials and technologies - Provides an interdisciplinary look at 3D printing in medicine, bridging the gap between engineering and clinical fields - Includes completely updated content with additional new chapters, covering topics such as organs-on-chips, bioprinting regulations, intellectual properties, medical standards in 3D printing, and more
