A Review on Kinetic Energy Harvesting with Focus on 3D Printed Electromagnetic Vibration Harvesters

The increasing amount of Internet of Things (IoT) devices and wearables require a reliable energy source. Energy harvesting can power these devices without changing batteries. Three-dimensional printing allows us to manufacture tailored harvesting devices in an easy and fast way. This paper presents the development of hybrid and non-hybrid 3D printed electromagnetic vibration energy harvesters. Various harvesting approaches, their utilised geometry, functional principle, power output and the applied printing processes are shown. The gathered harvesters are analysed, challenges examined and research gaps in the field identified. The advantages and challenges of 3D printing harvesters are discussed. Reported applications and strategies to improve the performance of printed harvesting devices are presented.

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Influence of the Infill Geometry of 3D-Printed Tablets on Drug Dissolution

Medical Sciences Forum ◽

10.3390/msf2021005015 ◽

2021 ◽

Vol 5 (1) ◽

pp. 15

Author(s):

Nuno Venâncio ◽

Gabriela G. Pereira ◽

João F. Pinto ◽

Ana I. Fernandes

Keyword(s):

Three Dimensional ◽

Drug Dissolution ◽

Fused Deposition Modelling ◽

Three Dimensional Printing ◽

Preliminary Results ◽

Fused Deposition ◽

3D Printed ◽

Dimensional Printing ◽

Hot Melt ◽

Patient Centric

Patient-centric therapy is especially important in pediatrics and may be attained by three-dimensional printing. Filaments containing 30% w/w of theophylline were produced by hot-melt extrusion and printed using fused deposition modelling to produce tablets. Here, preliminary results evaluating the effect of infill geometry (cross, star, grid) on drug content and release are reported.

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3D-Printed Conductive Filaments Based on Carbon Nanostructures Embedded in a Polymer Matrix

Research Anthology on Synthesis, Characterization, and Applications of Nanomaterials ◽

10.4018/978-1-7998-8591-7.ch072 ◽

2021 ◽

pp. 1725-1742

Author(s):

Diogo José Horst ◽

Pedro Paulo Andrade Junior

Keyword(s):

Polymer Matrix ◽

Carbon Nanostructures ◽

Three Dimensional ◽

Full Potential ◽

Electrically Conductive ◽

Three Dimensional Printing ◽

Current State ◽

3D Printed ◽

The Subject ◽

Dimensional Printing

Conductive and magnetic filaments are revolutionizing three-dimensional printing (3DP) to a new level. This review study presents the current state of the art on the subject, summarizing recent high impact studies about main advances regarding the application of 3DP filaments based on carbon nanostructures such as graphene, carbon fibers, nanotubes, and conductive carbon black embedded in a polymer matrix, by reviewing its main characteristics and showing the main producers and also the products available on the market. The availability of inexpensive, reliable, and electrically conductive material will be indispensable for the fabrication of circuits and sensors before the full potential of 3DP for customized products incorporating electrical elements can be fully explored.

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3D-Printed Soft Structure of Polyurethane and Magnetorheological Fluid: A Proof-of-Concept Investigation of its Stiffness Tunability

Micromachines ◽

10.3390/mi10100655 ◽

2019 ◽

Vol 10 (10) ◽

pp. 655 ◽

Cited By ~ 1

Author(s):

Seong-Woo Hong ◽

Ji-Young Yoon ◽

Seong-Hwan Kim ◽

Sun-Kon Lee ◽

Yong-Rae Kim ◽

...

Keyword(s):

Fused Deposition Modeling ◽

Permanent Magnets ◽

Thermoplastic Polyurethane ◽

Three Dimensional ◽

Magnetorheological Fluid ◽

Three Dimensional Printing ◽

Fused Deposition ◽

Deposition Modeling ◽

3D Printed ◽

Dimensional Printing

In this study, a soft structure with its stiffness tunable by an external field is proposed. The proposed soft beam structure consists of a skin structure with channels filled with a magnetorheological fluid (MRF). Two specimens of the soft structure are fabricated by three-dimensional printing and fused deposition modeling. In the fabrication, a nozzle is used to obtain channels in the skin of the thermoplastic polyurethane, while another nozzle is used to fill MRF in the channels. The specimens are tested by using a universal tensile machine to evaluate the relationships between the load and deflection under two different conditions, without and with permanent magnets. It is empirically shown that the stiffness of the proposed soft structure can be altered by activating the magnetic field.

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Three-Dimensional Printing of Prenatal Ultrasonographic Diagnosis of Cleft Lip and Palate: Presenting the Needed “Know-How” and Discussing Its Use in Parental Education

The Cleft Palate-Craniofacial Journal ◽

10.1177/1055665620926348 ◽

2020 ◽

Vol 57 (8) ◽

pp. 1041-1044

Author(s):

Matthias Schlund ◽

Jean-Marc Levaillant ◽

Romain Nicot

Keyword(s):

Parental Education ◽

Cleft Lip ◽

Cleft Lip And Palate ◽

Three Dimensional ◽

3D Models ◽

Prenatal Counseling ◽

Three Dimensional Printing ◽

3D Printed ◽

3D Information ◽

Dimensional Printing

Parental prenatal counseling is of paramount significance since parents often experience an emotional crisis with feelings of disappointment and helplessness. Three-dimensional (3D) printed model of the unborn child’s face presenting with cleft lip and palate, based on ultrasonographic information, could be used to provide visual 3D information, further enhancing the prospective parent’s comprehension of their unborn child’s pathology and morphology, helping them to be psychologically prepared and improving the communication with the caretaking team. Prospective parents appreciate if prenatal counseling is available with the most detailed information as well as additional resources. The technique necessary to create 3D models after ultrasonographic information is explained, and the related costs are evaluated. The use of such models in parental education is then discussed.

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3D-Printed Conductive Filaments Based on Carbon Nanostructures Embedded in a Polymer Matrix

International Journal of Applied Nanotechnology Research ◽

10.4018/ijanr.2019010103 ◽

2019 ◽

Vol 4 (1) ◽

pp. 26-40 ◽

Cited By ~ 1

Author(s):

Diogo José Horst ◽

Pedro Paulo Andrade Junior

Keyword(s):

Polymer Matrix ◽

Carbon Nanostructures ◽

Three Dimensional ◽

Full Potential ◽

Electrically Conductive ◽

Three Dimensional Printing ◽

Current State ◽

3D Printed ◽

The Subject ◽

Dimensional Printing

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Utility of Three-Dimensional Printing for Preoperative Assessment of Children with Extra-Cranial Solid Tumors: A Systematic Review

Pediatric Reports ◽

10.3390/pediatric14010006 ◽

2022 ◽

Vol 14 (1) ◽

pp. 32-39

Author(s):

Sachit Anand ◽

Nellai Krishnan ◽

Prabudh Goel ◽

Anjan Kumar Dhua ◽

Vishesh Jain ◽

...

Keyword(s):

Systematic Review ◽

3D Printing ◽

Solid Tumors ◽

Surgical Planning ◽

Three Dimensional ◽

Current Evidence ◽

Printing Technology ◽

Three Dimensional Printing ◽

3D Printed ◽

Dimensional Printing

Background: In cases with solid tumors, preoperative radiological investigations provide valuable information on the anatomy of the tumor and the adjoining structures, thus helping in operative planning. However, due to a two-dimensional view in these investigations, a detailed spatial relationship is difficult to decipher. In contrast, three-dimensional (3D) printing technology provides a precise topographic view to perform safe surgical resections of these tumors. This systematic review aimed to summarize and analyze current evidence on the utility of 3D printing in pediatric extra-cranial solid tumors. Methods: The present study was registered on PROSPERO—international prospective register of systematic reviews (registration number: CRD42020206022). PubMed, Embase, SCOPUS, and Google Scholar databases were explored with appropriate search criteria to select the relevant studies. Data were extracted to study the bibliographic information of each article, the number of patients in each study, age of the patient(s), type of tumor, organ of involvement, application of 3D printing (surgical planning, training, and/or parental education). The details of 3D printing, such as type of imaging used, software details, printing technique, printing material, and cost were also synthesized. Results: Eight studies were finally included in the systematic review. Three-dimensional printing technology was used in thirty children with Wilms tumor (n = 13), neuroblastoma (n = 7), hepatic tumors (n = 8), retroperitoneal tumor (n = 1), and synovial sarcoma (n = 1). Among the included studies, the technology was utilized for preoperative surgical planning (five studies), improved understanding of the surgical anatomy of solid organs (two studies), and improving the parental understanding of the tumor and its management (one study). Computed tomography and magnetic resonance imaging were either performed alone or in combination for radiological evaluation in these children. Different types of printers and printing materials were used in the included studies. The cost of the 3D printed models and time involved (range 10 h to 4–5 days) were reported by two studies each. Conclusions: 3D printed models can be of great assistance to pediatric surgeons in understanding the spatial relationships of tumors with the adjacent anatomic structures. They also facilitate the understanding of families, improving doctor–patient communication.

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Metabolism Control in 3D Printed Living Materials

10.1101/2021.01.15.426505 ◽

2021 ◽

Author(s):

Tobias Butelmann ◽

Hans Priks ◽

Zoel Parent ◽

Trevor G. Johnston ◽

Tarmo Tamm ◽

...

Keyword(s):

Three Dimensional ◽

Terminal Electron Acceptor ◽

Three Dimensional Printing ◽

Microbial Cell Factories ◽

Cell Factories ◽

Brewing Process ◽

3D Printed ◽

Dimensional Printing ◽

Living Materials

AbstractThe three-dimensional printing of cells offers an attractive opportunity to design and develop innovative biotechnological applications, such as the fabrication of biosensors or modular bioreactors. Living materials (LMs) are cross-linked polymeric hydrogel matrices containing cells, and recently, one of the most deployed LMs consists of F127-bis-urethane methacrylate (F127-BUM). The material properties of F127-BUM allow reproducible 3D printing and stability of LMs in physiological environments. These materials are permissible for small molecules like glucose and ethanol. However, no information is available for oxygen, which is essential— for example, towards the development of aerobic bioprocesses using microbial cell factories. To address this challenge, we investigated the role of oxygen as a terminal electron acceptor in the budding yeast’s respiratory chain and determined its permissibility in LMs. We quantified the ability of cell-retaining LMs to utilize oxygen and compared it with cells in suspension culture. We found that the cells’ ability to consume oxygen was heavily impaired inside LMs, indicating that the metabolism mostly relied on fermentation instead of respiration. To demonstrate an application of these 3D printed LMs, we evaluated a comparative brewing process. The analysis showed a significantly higher (3.7%) ethanol production using 3D printed LMs than traditional brewing, indicating an efficient control of the metabolism. Towards molecular and systems biology studies using LMs, we developed a highly reliable method to isolate cells from LMs for flow cytometry and further purified macromolecules (proteins, RNA, and DNA). Our results show the application of F127-BUM-based LMs for microaerobic processes and envision the development of diverse bioprocesses using versatile LMs in the future.

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Tissue Engineering and Three-Dimensional Printing in Periodontal Regeneration: A Literature Review

Journal of Clinical Medicine ◽

10.3390/jcm9124008 ◽

2020 ◽

Vol 9 (12) ◽

pp. 4008

Author(s):

Simon Raveau ◽

Fabienne Jordana

Keyword(s):

Selective Laser Sintering ◽

Periodontal Regeneration ◽

Three Dimensional ◽

Computer Assisted ◽

Natural Polymers ◽

Three Dimensional Printing ◽

Computer Assisted Design ◽

New Ideas ◽

3D Printed ◽

Dimensional Printing

The three-dimensional printing of scaffolds is an interesting alternative to the traditional techniques of periodontal regeneration. This technique uses computer assisted design and manufacturing after CT scan. After 3D modelling, individualized scaffolds are printed by extrusion, selective laser sintering, stereolithography, or powder bed inkjet printing. These scaffolds can be made of one or several materials such as natural polymers, synthetic polymers, or bioceramics. They can be monophasic or multiphasic and tend to recreate the architectural structure of the periodontal tissue. In order to enhance the bioactivity and have a higher regeneration, the scaffolds can be embedded with stem cells and/or growth factors. This new technique could enhance a complete periodontal regeneration. This review summarizes the application of 3D printed scaffolds in periodontal regeneration. The process, the materials and designs, the key advantages and prospects of 3D bioprinting are highlighted, providing new ideas for tissue regeneration.

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Use of three-dimensional printing for simulation in ultrasound education: a scoping review

BMJ Simulation and Technology Enhanced Learning ◽

10.1136/bmjstel-2020-000663 ◽

2020 ◽

pp. bmjstel-2020-000663

Author(s):

Patrick Gallagher ◽

Ryan Smith ◽

Gillian Sheppard

Keyword(s):

Scoping Review ◽

Computer Aided Design ◽

Low Cost ◽

Three Dimensional ◽

Low Frequency ◽

Imaging Data ◽

Ultrasound Education ◽

Three Dimensional Printing ◽

3D Printed ◽

Dimensional Printing

BackgroundThere is a significant learning curve when teaching ultrasonography to medical trainees; task trainers can help learners to bridge this gap and develop their skills. Three-dimensional printing technology has the potential to be a great tool in the development of such simulators. ObjectiveThis scoping review aimed to identify what 3D-printed models have been used in ultrasound education to date, how they were created and the pros and limitations involved.DesignResearchers searched three online databases to identify 3D-printed ultrasound models used in medical education.ResultsTwelve suitable publications were identified for inclusion in this review. The models from included articles simulated largely low frequency and/or high stakes events, with many models simulating needle guidance procedures. Most models were created by using patient imaging data and a computer-aided design software to print structures directly or print casting molds. The benefits of 3D-printed educational trainers are their low cost, reproducibility, patient specificity and accuracy. The current limitations of this technology are upfront investments and a lack of optimisation of materials.ConclusionsThe use of 3D-printed ultrasound task trainers is in its infancy, and more research is needed to determine whether or not this technology will benefit medical learners in the future.

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Development of Smartphone-Controlled Hand and Arm Exoskeleton for Persons with Disability

Open Engineering ◽

10.1515/eng-2021-0016 ◽

2020 ◽

Vol 11 (1) ◽

pp. 161-170

Author(s):

J-R. R. Diego ◽

Dan William C. Martinez ◽

Gerald S. Robles ◽

John Ryan C. Dizon

Keyword(s):

3D Printing ◽

Low Cost ◽

Three Dimensional ◽

Prosthetic Device ◽

Three Dimensional Printing ◽

Plastic Materials ◽

3D Printed ◽

Available Technology ◽

Electronic Parts ◽

Dimensional Printing

AbstractThis study addresses the need for assistive technology of people who lost control of their upper limbs as well as people who are undergoing rehabilitation. Loss of upper limb control causes lack of functionality and social acceptability especially for many people in developing countries with fewer available technology. The study develops a modern but low-cost prosthetic device that can be controlled by users using a smartphone and can be rapidly manufactured using three-dimensional printing (3D printing) of plastic materials. The development of the prosthetic device includes designing the mechanical and electronic parts, programming the Arduino board and Android application for control, simulation and analysis of 3D printed parts most subjected to stress, and 3D printing the parts under different settings. The device was tested in terms of time spent and capacity of lifting varying loads when not worn and when worn by users. The device can effectively lift 500 grams of load in one second for a person weighing between 50 to 60 kilograms.

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