scholarly journals Three-dimensional printing in healthcare

2021 ◽  
Author(s):  
◽  
A. I. Pérez-Sanpablo
Keyword(s):  
3D Printing ◽  
Three Dimensional ◽  
Medical Personnel ◽  
Spare Parts ◽  
Initial Examination ◽  
Advantages And Disadvantages ◽  
Main Challenge ◽  
Narrative Literature ◽  
Narrative Literature Review ◽  
The Cost

This work aims to briefly present the cutting edge of 3D printing innovation in healthcare. This technology is used for surgical planning, medical education, bioprinting of tissues, and medical equipment spare parts in fields like pharmacology, prosthetics, surgery, and regenerative medicine. A review of the last decade was made in the search engines of PubMed and Espacenet. Three authors reviewed titles, abstracts, and keywords separately to identify studies appropriate to the topic. After the initial examination, complete texts of identified relevant studies were obtained and classified according to the authors. Results were synthesized in a narrative literature review. The revision showed that 3D printing has become of common use in the healthcare system since it allows medical personnel to implement customized solutions for each patient, thus reducing the probability of a false diagnostic or treatment. Major applications among the advantages and disadvantages of 3D printing in healthcare were presented. Nowadays, the main challenge in 3D printing is the cost of the equipment and its manufacturing. In the future, the challenges in cost could be reduced, but processing requirements and limited materials may still need further work.

Circular Economy, 3D Printing, and the Biosphere Rules

2018 ◽  
Vol 60 (3) ◽  
pp. 95-111 ◽  
Author(s):  
Gregory Unruh
Keyword(s):  
3D Printing ◽  
Circular Economy ◽  
Sustainable Manufacturing ◽  
Three Dimensional ◽  
Spare Parts ◽  
Policy Makers ◽  
Management Framework ◽  
Environmentally Sustainable ◽  
Industrial Sectors ◽  
Cradle To Cradle

This article applies the Biosphere Rules—a biomimicry-inspired management framework for circular economy initiatives—to the emerging field of additive manufacturing and three-dimensional (3D) Printing, which are revolutionizing industrial sectors from medical devices to spare parts. They are also potentially keys in the emergence of a true circular economy that will bring about environmentally sustainable manufacturing. This article lays out an established strategy that can guide managers and policy makers in pursuit of a cradle-to-cradle economy.

scholarly journals APPLICATION OF ADDITIVE TECHNOLOGIES IN CONSTRUCTION AND IN THE PRODUCTION OF CERAMIC PRODUCTS

2020 ◽  
pp. 134-141
Author(s):  
N. Kirillova ◽  
A. Alekseeva ◽  
A. Egorova
Keyword(s):  
3D Printing ◽  
Raw Materials ◽  
Three Dimensional ◽  
Additive Technologies ◽  
High Temperature Strength ◽  
Form Complex ◽  
Advantages And Disadvantages ◽  
Analytical Review ◽  
3D Printers ◽  
The Republic

Additive technologies that allow creating volume objects of different complexity are becoming popular in different industries. There is an increase in the scale of introduction of 3D printing technologies in the construction industry, including in the production of ceramic products. With the help of modern additive technologies, different models, products and designs are created. They can be complex and can be made from different materials. Experts are wondering what the future holds for additive technologies in construction, as well as in ceramic production, as these technologies can save resources, reduce the time of the technological process and form complex shapes. The article presents an analytical review of the global application of additive technologies in construction, as well as in the manufacture of ceramic products. The advantages and disadvantages, the possibilities of 3D printing are considered. The creation of ceramic three-dimensional products is still a rare area of additive technologies that requires research. The production of ceramic products, superior to other materials in terms of high temperature strength, hardness, chemical and thermal resistance, has a high potential for the use of additive technologies. The types of construction 3D printers and raw materials for them are analyzed. The results of a study of the properties of clay raw materials of the Sannikovsky, Namtsyrsky and Kangalassky deposits of the Republic of Sakha (Yakutia) are presented.

Living the heart in three dimensions: applications of 3D printing in CHD

2019 ◽  
Vol 29 (06) ◽  
pp. 733-743 ◽  
Author(s):  
Mari Nieves Velasco Forte ◽  
Tarique Hussain ◽  
Arno Roest ◽  
Gorka Gomez ◽  
Monique Jongbloed ◽  
...  
Keyword(s):  
3D Printing ◽  
Heart Surgery ◽  
Wide Spectrum ◽  
Three Dimensional ◽  
Structural Heart Disease ◽  
Medical Personnel ◽  
Three Dimensions ◽  
Patient Specific ◽  
3D Printed

AbstractAdvances in biomedical engineering have led to three-dimensional (3D)-printed models being used for a broad range of different applications. Teaching medical personnel, communicating with patients and relatives, planning complex heart surgery, or designing new techniques for repair of CHD via cardiac catheterisation are now options available using patient-specific 3D-printed models. The management of CHD can be challenging owing to the wide spectrum of morphological conditions and the differences between patients. Direct visualisation and manipulation of the patients’ individual anatomy has opened new horizons in personalised treatment, providing the possibility of performing the whole procedure in vitro beforehand, thus anticipating complications and possible outcomes. In this review, we discuss the workflow to implement 3D printing in clinical practice, the imaging modalities used for anatomical segmentation, the applications of this emerging technique in patients with structural heart disease, and its limitations and future directions.

scholarly journals The Indirect Bonding Technique in Orthodontics—A Narrative Literature Review

Materials ◽  
2020 ◽  
Vol 13 (4) ◽  
pp. 986
Author(s):  
Agnieszka Nawrocka ◽  
Monika Lukomska-Szymanska
Keyword(s):  
Great Precision ◽  
Time Saving ◽  
Advantages And Disadvantages ◽  
Indirect Bonding ◽  
Narrative Literature ◽  
Narrative Literature Review ◽  
Indirect Technique ◽  
Plaster Model ◽  
Technique Development ◽  
Bonding Technique

The technique described as indirect bonding is an alternative to the conventional intraoral method of bracket placement. The appliance position is planned and fixed on a plaster model and then transferred into the oral cavity. Indirect bonding is a precise and time-saving technique of bracket placement, growing in popularity in recent years. It provides a combination of great precision with time efficiency. The fundaments of the indirect bonding technique are presented here. From the first clinical trial conducted almost fifty years ago, the method has evolved; the progress that has been made is described. Modern technologies involving computer scanning and manufacturing have led to great precision in bracket placement. Digital innovations such as rapid prototyping and stereolithography open up a new avenue of research and represent the next steps in indirect technique development. Individual 3D transfers are convenient in difficult clinical cases and can improve the effectiveness of the procedure, reduce the number of technical stages and reduce total chairside time. This paper also summarizes the advancement in adhesive materials, including an overview of advantages and disadvantages of different types of bonding resins and of the mean shear bond strength (SBS) achieved in the indirect procedure.

scholarly journals Asymmetric collaboration in virtual reality

2019 ◽  
Vol 12 (20) ◽  
Author(s):  
Lui Albæk Thomsen ◽  
Niels Christian Nilsson ◽  
Rolf Nordahl ◽  
Boris Lohmann
Keyword(s):  
Virtual Reality ◽  
Three Dimensional ◽  
Learning Performance ◽  
Learning Activity ◽  
Academic Knowledge ◽  
Practical Guidelines ◽  
Narrative Literature ◽  
Narrative Literature Review ◽  
Communication Dynamics ◽  
Asymmetric Game

It has been established that Virtual Reality (VR) possesses certain qualities for educational purposes. These include the ability to place the learner at the location or in the perspective that the desired knowledge exists (e.g., travelling to another planet or shrinking to miniature size to observe internal anatomy). VR is also considered to contribute with enriching the curricular content, promoting active forms of learning, performance assessment of high validity, and provide the opportunity to teach applied academic knowledge in life-like situations. In regards to teaching mathematics and geometry, three key affordances have been identified; interactive manipulation and construction of three-dimensional geometry, comprehension of spatial relationships, and rectification of abstract problems. Safety protocols and practical guidelines from classroom experimentation have also been formulated by various research projects. In this manuscript, asymmetrical immersive VR in education will be reviewed, as it is relevant for the narrative of learning situations where multiple students use the technology together. As an example, in mathematics, asymmetric VR could be used in contexts where unknown variables must be found in collaboration. The purpose of the narrative literature review is to gain a greater understanding of how asymmetric game mechanics has influence on communication and collaboration between learners. To map the dynamics of this type of learning activity, a taxonomy will be presented. Since VR is still under development in terms of hardware and software, it is important that the current and future technical possibilities are described in a conceptual manner, as well as conclude on optimal coupling between communication dynamics and collaboration mechanics.

scholarly journals Design and Development of Plastic Filament Extruder for 3D Printing

2018 ◽  
Vol 10 (3) ◽  
pp. 23 ◽  
Author(s):  
Mamta H. Wankhade ◽  
Satish G. Bahaley
Keyword(s):  
Additive Manufacturing ◽  
3D Printing ◽  
Three Dimensional ◽  
3D Printer ◽  
3D Objects ◽  
Fused Deposition ◽  
Additive Manufacturing Technology ◽  
Mechanized Method ◽  
Dimensional Object ◽  
The Cost

<p>3D printing is a form of additive manufacturing technology where a three dimensional object is created by laying down successive layers of material. It is mechanized method whereby 3D objects are quickly made on a reasonably sized machine connected to a computer containing blueprints for the object. As 3D printing is growing fast and giving a boost to product development, the factories doing 3D printing need to continuously meet the printing requirements and maintain an adequate amount of inventory of the filament. As the manufactures have to buy these filaments from various vendors, the cost of 3D printing increases. To overcome the problem faced by the manufacturers, small workshop owners, the need of 3D filament making machine arises. This project focuses on designing and fabricating a portable fused deposition 3D printer filament making machine with cheap and easily available components to draw 1.75 mm diameter ABS filament.</p>

scholarly journals The visualization of a mountain using 3D printing

2017 ◽  
Vol 66 (3) ◽  
pp. 45-61
Author(s):  
Jakub Wabiński ◽  
Marta Kuźma
Keyword(s):  
3D Printing ◽  
Fused Deposition Modeling ◽  
Dimensional Space ◽  
Three Dimensional ◽  
Digital Terrain Model ◽  
Three Dimensions ◽  
Terrain Model ◽  
Fused Deposition ◽  
Advantages And Disadvantages ◽  
Digital Terrain

Flat studies showing terrain (e.g. in form of maps) do not fully reflect its nature. Planning or design projects are definitely better represented in three-dimensional space. Previously used “sand tables”, especially popular in military applications, are expensive and uncomfortable to use due to their large size. In addition, they are modifiable only to a small extent and do not provide such accuracy as traditional maps. With the development of modern model relief techniques, a spectrum of the possibilities for development of customized spatial models (defined as models of the surrounding reality, mapped in the appropriate scale in three dimensions), has increased. The aim of this article is to present the possibilities of using 3D printing for the visualization of a mountain. Based on the digital terrain model (DTM), a model of a part of the Tatra Mountains was developed. It was established by DTM data processing and printing on a 3D printer using the FDM (Fused Deposition Modeling) technology. This article describes the principles for developing such a model and the advantages and disadvantages of the proposed solution. Keywords: cartography, digital terrain model, sand table, FDM technology

scholarly journals The Effect of Chemical Cleaning on Mechanical Properties of Three-Dimensional Printed Polylactic Acid

2020 ◽  
Vol 14 (1) ◽  
Author(s):  
Julie C. Fleischer ◽  
Jan C. Diehl ◽  
Linda S. G. L. Wauben ◽  
Jenny Dankelman
Keyword(s):  
Mechanical Properties ◽  
3D Printing ◽  
Polylactic Acid ◽  
Three Dimensional ◽  
Spare Parts ◽  
Healthcare Sector ◽  
Strength Increase ◽  
Chemical Cleaning ◽  
Middle Income ◽  
3D Printed

Abstract Three-dimensional (3D) printing may be a solution to shortages of equipment and spare parts in the healthcare sector of low- and middle-income countries (LMICs). Polylactic acid (PLA) for 3D printing is widely available and biocompatible, but there is a gap in knowledge concerning its compatibility with chemical disinfectants. In this study, 3D-printed PLA tensile samples were created with six different printer settings. Each of these six batches consisted of five sets with five or six samples. The first set remained untreated, the others were soaked in Cidex OPA or in a chlorine solution. These were applied for seven consecutive days or in 25 short cycles. All samples were weighed before and after treatment and subjected to a tensile test. Results showed that a third of the treatments led to an increase of the median weight with a maximum of 8.3%, however, the samples with the best surface quality did not change. The median strength increase was 12.5% and the largest decrease was 8.8%. The median stiffness decreased 3.6% in one set and increased in three others up to 13.6%. When 3D printing PLA medical tools, surface porosity must be minimized to prevent transfer of disinfectants to people. The wide variability of mechanical properties due to 3D printing itself and as a consequence of disinfection must be considered when designing medical tools by selecting appropriate printer settings. If these conditions are met, reusing 3D-printed PLA medical tools seems safe from a mechanical point of view.

scholarly journals Freeform 3D printing of vascularized tissues: Challenges and strategies

2021 ◽  
Vol 12 ◽  
pp. 204173142110572
Author(s):  
Hyun Lee ◽  
Tae-Sik Jang ◽  
Ginam Han ◽  
Hae-Won Kim ◽  
Hyun-Do Jung
Keyword(s):  
3D Printing ◽  
Three Dimensional ◽  
Vascular Networks ◽  
3D Objects ◽  
Advantages And Disadvantages ◽  
Printing Quality ◽  
And Performance ◽  
Material Information ◽  
Printing Ink ◽  
Selection Of

In recent years, freeform three-dimensional (3D) printing has led to significant advances in the fabrication of artificial tissues with vascularized structures. This technique utilizes a supporting matrix that holds the extruded printing ink and ensures shape maintenance of the printed 3D constructs within the prescribed spatial precision. Since the printing nozzle can be translated omnidirectionally within the supporting matrix, freeform 3D printing is potentially applicable for the fabrication of complex 3D objects, incorporating curved, and irregular shaped vascular networks. To optimize freeform 3D printing quality and performance, the rheological properties of the printing ink and supporting matrix, and the material matching between them are of paramount importance. In this review, we shall compare conventional 3D printing and freeform 3D printing technologies for the fabrication of vascular constructs, and critically discuss their working principles and their advantages and disadvantages. We also provide the detailed material information of emerging printing inks and supporting matrices in recent freeform 3D printing studies. The accompanying challenges are further discussed, aiming to guide freeform 3D printing by the effective design and selection of the most appropriate materials/processes for the development of full-scale functional vascularized artificial tissues.

scholarly journals Three-dimensional printing versus conventional machining in the creation of a meatal urethral dilator: a cost and mechanical strength analysis

2020 ◽  
Author(s):  
Michael Yue-Cheng Chen ◽  
Jacob Skewes ◽  
Ryan Daley ◽  
Maria Ann Woodruff ◽  
Nicholas John Rukin
Keyword(s):  
3D Printing ◽  
Low Cost ◽  
Three Dimensional ◽  
Patient Specific ◽  
Strength Analysis ◽  
3D Printer ◽  
Fused Deposition ◽  
3D Printed ◽  
The Cost ◽  
Conventional Machining

Abstract Background Three-dimensional (3D) printing is a promising technology in medicine. Low-cost 3D printing options are accessible but the limitations are often poorly understood. We aim to compare fused deposition modelling (FDM), the most common and low cost 3D printing technique, with selective laser sintering (SLS) and conventional machining techniques in manufacturing meatal urethral dilators which were recently removed from the Australian market.Methods A meatal urethral dilator was designed using computer-aided design (CAD). The dilator was 3D printed vertically orientated on a low cost FDM 3D printer in polylactic acid (PLA) and acrylonitrile butadiene styrene (ABS). It was also 3D printed horizontally orientated in ABS on a high-end FDM 3D printer with soluble support material, as well as on a SLS 3D printer in medical nylon. The dilator was also machined in medical stainless steel using a lathe. All dilators were tested mechanically in a custom rig by hanging calibrated weights from the handle until the dilator snapped.Results The horizontally printed ABS dilator experienced failure at a greater load than the vertically printed PLA and ABS dilators respectively (503g vs 283g vs 163g, p < 0.001). The SLS nylon dilator did not fail but began to bend and deformed at around 5,000g of pressure. The steel dilator did not bend even at 10,000g of pressure. The cost per dilator is highest for the steel dilator if assuming a low quantity of five at 98 USD, but this decreases to 30 USD for a quantity of 1000. In contrast, the cost for the SLS dilator is 33 USD for a quantity of five but relatively unchanged at 27 for a quantity of 1000.Conclusions SLS and conventional machining created clinically functional meatal dilators but low-cost FDM printing could not. We suggest that at the current time 3D printing is not a replacement for conventional manufacturing techniques which are still the most reliable way to produce large quantities of parts with a simple geometry such as the meatal dilator. 3D printing is best used for patient-specific parts, prototyping or manufacturing complex parts that have additional functionality that cannot be achieved with conventional machining methods.

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