scholarly journals Towards 3D printing of a monocoque transtibial prosthesis using a bio-inspired design workflow

2021 ◽  
Vol 27 (11) ◽  
pp. 67-80
Author(s):  
Luca Gabriele De Vivo Nicoloso ◽  
Joshua Pelz ◽  
Herb Barrack ◽  
Falko Kuester
Keyword(s):  
3D Printing ◽  
Human Motion ◽  
Optimization Techniques ◽  
Digital Design ◽  
Digital Workflow ◽  
Content Type ◽  
Prosthetic Devices ◽  
Custom Made ◽  
Design And Manufacturing ◽  
Transtibial Prosthesis

Purpose There are over 40 million amputees globally with more than 185,000 Americans losing their limbs every year. For most of the world, prosthetic devices remain too expensive and uncomfortable. This paper aims to outline advancements made by a multidisciplinary research group, interested in advancing the restoration of human motion through accessible lower limb prostheses. Design/methodology/approach Customization, comfort and functionality are the most important metrics reported by prosthetists and patients. The work of this paper presents the design and manufacturing of a custom made, cost-effective and functional three-dimensional (3D) printed transtibial prosthesis monocoque design. The design of the prosthesis integrates 3D imaging, modelling and optimization techniques coupled with additive manufacturing. Findings The successful fabrication of a functional monocoque prosthesis through 3D printing indicates the workflow may be a solution to the worldwide accessibility crisis. The digital workflow developed in this work offers great potential for providing prosthetic devices to rural communities, which lack access to skilled prosthetic physicians. The authors found that using the workflow together with 3D printing, this study can create custom monocoque prostheses (Figure 16). These prostheses are comfortable, functional and properly aligned. In comparison with traditional prosthetic devices, the authors slowered the average cost, weight and time of production by 95%, 55% and 95%, respectively. Social implications This novel digital design and manufacturing workflow has the potential to democratize and globally proliferate access to prosthetic devices, which restore the patient’s mobility, quality of life and health. LIMBER’s toolbox can reach places where proper prosthetic and orthotic care is not available. The digital workflow reduces the cost of making custom devices by an order of magnitude, enabling broader reach, faster access and improved comfort. This is particularly important for children who grow quickly and need new devices every few months or years, timely access is both physically and psychologically important. Originality/value In this manuscript, the authors show the application of digital design techniques for fabricating prosthetic devices. The proposed workflow implements several advantageous changes and, most importantly, digitally blends the three components of a transtibial prosthesis into a single, 3D printable monocoque device. The development of a novel unibody transtibial device that is properly aligned and adjusted digitally, greatly reduces the number of visits an amputee must make to a clinic to have a certified prosthetist adjust and modify their prosthesis. The authors believe this novel workflow has the potential to ease the worldwide accessibility crisis for prostheses.

scholarly journals Low cost digital fabrication approach for thumb orthoses

2017 ◽  
Vol 23 (6) ◽  
pp. 1020-1031 ◽  
Author(s):  
Miguel Fernandez-Vicente ◽  
Ana Escario Chust ◽  
Andres Conejero
Keyword(s):  
3D Printing ◽  
Computer Aided Design ◽  
Low Cost ◽  
Three Dimensional ◽  
Recovery Process ◽  
Digital Fabrication ◽  
Cost Comparison ◽  
Content Type ◽  
Custom Made ◽  
The Impact

Purpose The purpose of this paper is to describe a novel design workflow for the digital fabrication of custom-made orthoses (CMIO). It is intended to provide an easier process for clinical practitioners and orthotic technicians alike. It further functions to reduce the dependency of the operators’ abilities and skills. Design/methodology/approach The technical assessment covers low-cost three-dimensional (3D) scanning, free computer-aided design (CAD) software, and desktop 3D printing and acetone vapour finishing. To analyse its viability, a cost comparison was carried out between the proposed workflow and the traditional CMIO manufacture method. Findings The results show that the proposed workflow is a technically feasible and cost-effective solution to improve upon the traditional process of design and manufacture of custom-made static trapeziometacarpal (TMC) orthoses. Further studies are needed for ensuring a clinically feasible approach and for estimating the efficacy of the method for the recovery process in patients. Social implications The feasibility of the process increases the impact of the study, as the great accessibility to this type of 3D printers makes the digital fabrication method easier to be adopted by operators. Originality/value Although some research has been conducted on digital fabrication of CMIO, few studies have investigated the use of desktop 3D printing in any systematic way. This study provides a first step in the exploration of a new design workflow using low-cost digital fabrication tools combined with non-manual finishing.

3D printing will affect global commodity markets

2016 ◽  
Keyword(s):  
3D Printing ◽  
Smart Materials ◽  
Industrial Revolution ◽  
Commodity Markets ◽  
Digital Design ◽  
Printable Electronics ◽  
Content Type ◽  
Marginal Costs ◽  
Supply And Distribution ◽  
Global Commodity Markets

Subject 3D printing and its ramifications for commodities. Significance General Electric (GE) calls 3D printing "the next industrial revolution". The technique promises to disrupt the manufacturing process, including supply and distribution chains, and to eliminate waste while producing superior and otherwise unmakeable components and reducing marginal costs. 3D printing currently consumes negligible amounts of commodities, but, as adoption expands, it may start affecting commodity supply chains. Impacts Wide adoption of 3D printing will reduce manufacturing waste and idle inventory. 3D printing will enable the development and use of smart materials. Printable electronics could change the usage and functionality of some materials. The potentially limitless customisation of mass-market products will spawn new digital design-to-distribution production platforms.

3D printing objects as knowledge artifacts for a do-it-yourself approach in clinical practice

2018 ◽  
Vol 52 (1) ◽  
pp. 163-186 ◽  
Author(s):  
Federico Cabitza ◽  
Angela Locoro ◽  
Aurelio Ravarini
Keyword(s):  
3D Printing ◽  
User Study ◽  
Medical Knowledge ◽  
Patient Specific ◽  
Free Text ◽  
Content Type ◽  
Knowledge Practices ◽  
Custom Made ◽  
Do It Yourself ◽  
The Impact

Purpose The purpose of this paper is to investigate the phenomenon of the digital do-it-yourself (DiDIY) in the medical domain. In particular, the main contribution of the paper is the analysis and discussion of a questionnaire-based user study focused on 3D printing (3DP) technology, which was conducted among clinicians of one of the most important research hospital group in Lombardy, Italy. Design/methodology/approach A general reflection on the notion of knowledge artifacts (KAs) and on the use of 3DP in medicine is followed by the research questions and by a more detailed analysis of the specialist literature on the usage of 3DP technology for diagnostic, training and surgical planning activities for clinicians and patients. The questionnaire-based user study design is then emerging from the conceptual framework for DiDIY in healthcare. To help focus on the main actors and assets composing the 3DP innovation roles in healthcare, the authors model: the DiDIY-er as the main initiator of the practice innovation; the available technology allowing the envisioning of new practices; the specific activities gaining benefits from the innovative techniques introduced; and the knowledge community continuously supporting and evolving knowledge practices. Findings The authors discuss the results of the user study in the light of the four main components of our DiDIY framework and on the notion of KA. There are differences between high expertise, or senior, medical doctors (MDs) and relatively lower expertise MDs, or younger MDs, regarding the willing to acquire 3DP competences; those who have seen other colleagues using 3DP are significantly more in favor of 3DP adoption in medical practices, and those who wish to acquire 3DP competence and do-by-themselves are significantly more interested in the making of custom-made patient-specific tools, such as cutting guides and templates; there are many recurrent themes regarding how 3DP usage and application may improve medical practice. In each of the free-text questions, there were comments regarding the impact of 3DP on medical knowledge practices, such as surgical rehearsal, surgery, pathology comprehension, patient-physician communication and teaching. Originality/value The 3DP adoption in healthcare is seen favorably and advocated by most of the respondents. In this domain, 3DP objects can be considered KAs legitimately. They can support knowledgeable practices, promote knowledge sharing and circulation in the healthcare community, as well as contribute to their improvement by the introduction of a new DiDIY mindset in the everyday work of MDs.

3D printing: a useful tool for the fabrication of artificial electromagnetic (EM) medium

2016 ◽  
Vol 22 (2) ◽  
pp. 251-257 ◽  
Author(s):  
Xiaoyong Tian ◽  
Ming Yin ◽  
Dichen Li
Keyword(s):  
3D Printing ◽  
Design Methodology ◽  
Three Dimensional ◽  
Manufacturing Strategy ◽  
Low Loss ◽  
Printing Process ◽  
Content Type ◽  
Design And Manufacturing ◽  
3D Printed ◽  
Loss Characteristic

Purpose Artificial electromagnetic (EM) medium and devices are designed with integrated micro- and macro-structures depending on the EM transmittance performance, which is difficult to fabricate by the conventional processes. Three-dimensional (3D) printing provides a new solution for the delicate artificial EM medium. This paper aims to first review the applications of 3D printing in the fabrication of EM medium briefly, mainly focusing on photonic crystals, metamaterials and gradient index (GRIN) devices. Then, a new design and fabrication strategy is proposed for the EM medium based on the 3D printing process, which was verified by the implementation of a 3D 90o Eaton lens based on GRIN metamaterials. Design/methodology/approach A new design and manufacturing strategy driven by the physical (EM transmittance) performance is proposed to illustrate the realization procedures of EM medium based device with controllable micro- and macro-structures. Stereolithography-based 3D printing process is used to obtain the designed EM device, an GRIN Eaton lens. The EM transmittance of the Eaton lens was validated experimentally and by simulation. Findings A 3D 90o Eaton lens was realized based on GRIN metamaterials structure according to the proposed design and manufacturing strategy, which had the broadband (12-18 GHz) and low loss characteristic. The feasibility of 3D printing for the artificial EM medium and GRIN devices has been verified for the further real applications in the industries. Originality/value The applications of 3D printing in artificial EM medium and devices were systematically reviewed. A new design strategy driven by physical performance for the EM device was proposed and validated by the firstly 3D printed 3D Eaton lens.

The Pransky interview: Dr Hod Lipson, Professor at Columbia University; Robotics, AI, Digital Design and Manufacturing Innovator and Entrepreneur

2019 ◽  
Vol 46 (5) ◽  
pp. 568-572
Author(s):  
Joanne Pransky
Keyword(s):  
3D Printing ◽  
Mechanical Engineering ◽  
Data Science ◽  
Industrial Robot ◽  
Digital Design ◽  
Columbia University ◽  
Israel Institute ◽  
Content Type ◽  
Institute Of Technology ◽  
Technion Israel Institute

Purpose This paper is a “Q&A interview” conducted by Joanne Pransky of Industrial Robot Journal as a method to impart the combined technological, business and personal experience of a prominent, robotic industry PhD and innovator regarding his personal journey and the commercialization and challenges of bringing a technological invention to market. This paper aims to discuss these issues. Design/methodology/approach The interviewee is Dr Hod Lipson, James and Sally Scapa Professor of Innovation of Mechanical Engineering and Data Science at Columbia University. Lipson’s bio-inspired research led him to co-found four companies. In this interview, Dr Lipson shares some of his personal and business experiences of working in academia and industry. Findings Dr Lipson received his BSc in Mechanical Engineering from the Technion Israel Institute of Technology in 1989. He worked as a software developer and also served for the next five years as a Lieutenant Commander for the Israeli Navy. He then co-founded his first company, Tri-logical Technologies (an Israeli company) in 1994 before pursuing a PhD, which was awarded to him from the Technion Israel Institute of Technology in Mechanical Engineering in the fall of 1998. From 1998 to 2001, he did his postdoc research at Brandeis University, Computer Science Department, while also lecturing at MIT. Dr Lipson served as Professor of Mechanical & Aerospace Engineering and Computing & Information Science at Cornell University for 14 years and joined Columbia University as a Professor in Mechanical Engineering in 2015. From 2013 to 2015, he also served as Editor-in-Chief for the journal 3D Printing and Additive Manufacturing (3DP), published by Mary Ann Liebert Inc. Originality/value Dr Lipson’s broad spectrum and multi-decades of research has focused on self-aware and self-replicating robots. Dr Lipson directs the Creative Machines Lab which pioneers new ways for novel autonomous systems to design and make other machines, based on biological concepts. In total, his lab has graduated over 50 graduate students and over 20 PhD and Postdocs. Some of these students joined Lipson, in cofounding startups, while others went on to found their own companies. Lipson has coauthored over 300 publications that received over 20,000 citations. He has also coauthored the award-winning book Fabricated: The New World of 3D Printing and the book Driverless: Intelligent Cars and the Road Ahead. Forbes magazine named him one of the “World's Most Powerful Data Scientists”. His TED Talk on self-aware machines is one of the most viewed presentations on AI and robotics.

Digital design and manufacturing of wood head golf club in a cyber physical environment

2017 ◽  
Vol 117 (4) ◽  
pp. 648-671 ◽  
Author(s):  
Danni Chang ◽  
Chun-Hsien Chen
Keyword(s):  
Graphical Models ◽  
Physical Environment ◽  
Computer Aided Design ◽  
Digital Design ◽  
Golf Club ◽  
Content Type ◽  
Knowledge Based ◽  
Design And Manufacturing ◽  
Seamless Connection ◽  
Integrate Design

Purpose The purpose of this paper is to establish a cyber physical environment for digital product design and manufacturing. To realize this goal, the specific issue of integrating design knowledge-based system (KBS) and 3D printing (3DP) system is focused. A graphics generation method is thereby developed to transform the KBS outputs into graphical format which can be directly read and manufactured by 3DP system. Design/methodology/approach A graphics generation method is proposed in this paper. Through organizing alphanumeric outputs of the consultation session with a design KBS into parametric format, the consultation results can be directly used by computer-aided design (CAD) tools to generate graphical models which can be further exported into a 3DP system to produce physical objects. Findings The proposed graphics generation method can be effective to link design KBS and 3DP. Therefore, the seamless connection between design and prototyping systems can be realized, which further lays the communication foundation for a cyber physical environment for digital design and manufacturing. Originality/value This study provides research insights about potential cyber physical system applications in digital design and manufacturing area. Moreover, this paper contributes an effective technique to integrate design KBS and 3DP.

Sign in / Sign up

Export Citation Format

Share Document