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https://www.readbyqxmd.com/read/28099494/a-3d-printed-toolbox-for-opto-mechanical-components
#1
Luis José Salazar-Serrano, Juan P Torres, Alejandra Valencia
In this article we present the development of a set of opto-mechanical components (a kinematic mount, a translation stage and an integrating sphere) that can be easily built using a 3D printer based on Fused Filament Fabrication (FFF) and parts that can be found in any hardware store. Here we provide a brief description of the 3D models used and some details on the fabrication process. Moreover, with the help of three simple experimental setups, we evaluate the performance of the opto-mechanical components developed by doing a quantitative comparison with its commercial counterparts...
2017: PloS One
https://www.readbyqxmd.com/read/28096747/implementing-a-3d-printing-service-in-a-biomedical-library
#2
Verma Walker
Three-dimensional (3D) printing is opening new opportunities in biomedicine by enabling creative problem solving, faster prototyping of ideas, advances in tissue engineering, and customized patient solutions. The National Institutes of Health (NIH) Library purchased a Makerbot Replicator 2 3D printer to give scientists a chance to try out this technology. To launch the service, the library offered training, conducted a survey on service model preferences, and tracked usage and class attendance. 3D printing was very popular, with new lab equipment prototypes being the most common model type...
January 2017: Journal of the Medical Library Association: JMLA
https://www.readbyqxmd.com/read/28094997/combined-inkjet-printing-and-infra-red-sintering-of-silver-nanoparticles-using-a-swathe-by-swathe-and-layer-by-layer-approach-for-3-dimensional-structures
#3
Jayasheelan Vaithilingam, Marco Simonelli, Ehab Saleh, Nicola Senin, Ricky D Wildman, Richard J M Hague, Richard K Leach, Christopher J Tuck
Despite the advancement of additive manufacturing/3-dimensional (3D) printing, single-step fabrication of multifunctional parts using AM is limited. With the view of enabling multifunctional AM (MFAM), in this study, sintering of metal nanoparticles was performed to obtain conductivity for continuous line inkjet printing of electronics. This was achieved using a bespoke three dimensional (3D) inkjet-printing machine, JETx®, capable of printing a range of materials and utilizing different post processing procedures to print multi-layered 3D structures in a single manufacturing step...
January 17, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/28094916/3d-printing-of-carbon-nanotubes-based-microsupercapacitors
#4
Wei Yu, Han Zhou, Ben Q Li, Shujiang Ding
A novel 3D printing procedure is presented for fabrication of carbon nanotubes-based microsupercapacitors. The 3D printer uses CNTs ink slurry with moderate solid content and prints continuous droplets. Appropriate control of a heated base is applied to facilitate the solvent removal and adhesion among printed features and to improve the structure integrity without delamination or distortion upon drying. The printed electrodes for microsupercapacitors are characterized by SEM, a laser scanning confocal microscope and a step profiler...
January 17, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/28094855/technical-note-dose-distributions-in-the-vicinity-of-high-density-implants-using-3d-gel-dosimeters
#5
Andre Asena, Shaun Thomas Smith, Tanya Kairn, Scott Bradley Crowe, Kazuyuki Hosokawa, Steven Sylvander, Jamie Vincent Trapp
PURPOSE: In this work, we develop a methodology for using Fricke gel dosimeters for dose distribution measurements surrounding high-density implants which circumvents artefact production by removing the obstruction during imaging. METHODS: Custom 3D printed moulds were used to set cavities in Fricke gel phantoms to allow for the suspension of high density implants in different geometries. This allowed for the metal valve extracted from a temporary tissue expander to be suspended during irradiation, and removed during optical-CT scanning...
January 17, 2017: Medical Physics
https://www.readbyqxmd.com/read/28094392/3d-printing-of-self-assembling-thermoresponsive-nanoemulsions-into-hierarchical-mesostructured-hydrogels
#6
Lilian C Hsiao, Abu Zayed Md Badruddoza, Li-Chiun Cheng, Patrick S Doyle
Spinodal decomposition and phase transitions have emerged as viable methods to generate a variety of bicontinuous materials. Here, we show that when arrested phase separation is coupled to the time scales involved in three-dimensional (3D) printing processes, hydrogels with multiple length scales spanning nanometers to millimeters can be printed with high fidelity. We use an oil-in-water nanoemulsion-based ink with rheological and photoreactive properties that satisfy the requirements of stereolithographic 3D printing...
January 17, 2017: Soft Matter
https://www.readbyqxmd.com/read/28093261/experimental-evaluation-of-a-new-morphological-approximation-of-the-articular-surfaces-of-the-ankle-joint
#7
Claudio Belvedere, Sorin Siegler, Andrea Ensini, Jason Toy, Paolo Caravaggi, Ramya Namani, Giulia Giannini, Stefano Durante, Alberto Leardini
The mechanical characteristics of the ankle such as its kinematics and load transfer properties are influenced by the geometry of the articulating surfaces. A recent, image-based study found that these surfaces can be approximated by a saddle-shaped, skewed, truncated cone with its apex oriented laterally. The goal of this study was to establish a reliable experimental technique to study the relationship between the geometry of the articular surfaces of the ankle and its mobility and stability characteristics and to use this technique to determine if morphological approximations of the ankle surfaces based on recent discoveries, produce close to normal behavior...
January 7, 2017: Journal of Biomechanics
https://www.readbyqxmd.com/read/28093047/3d-cell-printing-of-large-volume-tissues-application-to-ear-regeneration
#8
Jung-Seob Lee, Byung Soo Kim, Dong Hwan Seo, Jeong Hun Park, Dong-Woo Cho
The three-dimensional (3D) printing of large-volume cells, printed in a clinically relevant size, is one of the most important challenges in the field of tissue engineering. However, few studies have reported the fabrication of large-volume cell-printed constructs (LCCs). To create LCCs, appropriate fabrication conditions should be established: factors involved include fabrication time, residence time, and temperature control of the cell-laden hydrogel in the syringe to ensure high cell viability and functionality...
January 17, 2017: Tissue Engineering. Part C, Methods
https://www.readbyqxmd.com/read/28090512/surgical-applications-of-three-dimensional-printing-a-review-of-the-current-literature-how-to-get-started
#9
REVIEW
Don Hoang, David Perrault, Milan Stevanovic, Alidad Ghiassi
Three dimensional (3D) printing involves a number of additive manufacturing techniques that are used to build structures from the ground up. This technology has been adapted to a wide range of surgical applications at an impressive rate. It has been used to print patient-specific anatomic models, implants, prosthetics, external fixators, splints, surgical instrumentation, and surgical cutting guides. The profound utility of this technology in surgery explains the exponential growth. It is important to learn how 3D printing has been used in surgery and how to potentially apply this technology...
December 2016: Annals of Translational Medicine
https://www.readbyqxmd.com/read/28090509/innovations-in-surgery-simulation-a-review-of-past-current-and-future-techniques
#10
REVIEW
Ido Badash, Karen Burtt, Carlos A Solorzano, Joseph N Carey
As a result of recent work-hours limitations and concerns for patient safety, innovations in extraclinical surgical simulation have become a desired part of residency education. Current simulation models, including cadaveric, animal, bench-top, virtual reality (VR) and robotic simulators are increasingly used in surgical training programs. Advances in telesurgery, three-dimensional (3D) printing, and the incorporation of patient-specific anatomy are paving the way for simulators to become integral components of medical training in the future...
December 2016: Annals of Translational Medicine
https://www.readbyqxmd.com/read/28090431/a-role-for-3d-printing-in-kidney-on-a-chip-platforms
#11
Ryan D Sochol, Navin R Gupta, Joseph V Bonventre
The advancement of "kidney-on-a-chip" platforms - submillimeter-scale fluidic systems designed to recapitulate renal functions in vitro - directly impacts a wide range of biomedical fields, including drug screening, cell and tissue engineering, toxicity testing, and disease modelling. To fabricate kidney-on-a-chip technologies, researchers have primarily adapted traditional micromachining techniques that are rooted in the integrated circuit industry; hence the term, "chip." A significant challenge, however, is that such methods are inherently monolithic, which limits one's ability to accurately recreate the geometric and architectural complexity of the kidney in vivo...
March 2016: Current Transplantation Reports
https://www.readbyqxmd.com/read/28089938/3d-printed-rf-probeheads-for-low-cost-high-throughput-nmr
#12
R Adam Horch, John C Gore
3D printing has been exploited as a means to fabricate complete NMR probeheads containing arrays of miniature RF circuits for high-throughput solution-state NMR spectroscopy and potentially other purposes. 3D-printed NMR circuits of millimeter scale were constructed consisting of RF coils, variable tuning/matching capacitors, and liquid NMR sample cavities. Channels and cavities capable of being addressed using microfluidics are included in the probehead structure, providing a means for hydraulically-controlled RF tuning/matching and liquid NMR sample loading/unloading...
January 12, 2017: Magnetic Resonance Imaging
https://www.readbyqxmd.com/read/28089333/fit-of-interim-crowns-fabricated-using-photopolymer-jetting-3d%C3%A2-printing
#13
Hang-Nga Mai, Kyu-Bok Lee, Du-Hyeong Lee
STATEMENT OF PROBLEM: The fit of interim crowns fabricated using 3-dimensional (3D) printing is unknown. PURPOSE: The purpose of this in vitro study was to evaluate the fit of interim crowns fabricated using photopolymer-jetting 3D printing and to compare it with that of milling and compression molding methods. MATERIAL AND METHODS: Twelve study models were fabricated by making an impression of a metal master model of the mandibular first molar...
January 12, 2017: Journal of Prosthetic Dentistry
https://www.readbyqxmd.com/read/28088072/microstructural-mechanical-and-corrosion-characteristics-of-heat-treated-mg-1-2zn-0-5ca-wt-alloy-for-use-as-resorbable-bone-fixation-material
#14
Hamdy Ibrahim, Andrew D Klarner, Behrang Poorganji, David Dean, Alan A Luo, Mohammad Elahinia
Mg-Zn-Ca alloys have grabbed most of the recent attention in research attempting to develop an Mg alloy for bone fixation devices due to their superior biocompatibility. However, early resorption and insufficient strength remain the main problems that hinder their use. Heat treatment has previously been thoroughly studied as a post-shaping process, especially after the fabrication of complex parts (e.g. porous structures) by 3D-printing or powder metallurgy. In this work, the effect of heat treatment on Mg-1...
January 5, 2017: Journal of the Mechanical Behavior of Biomedical Materials
https://www.readbyqxmd.com/read/28080055/morphological-transformation-of-surface-femtodroplets-upon-dissolution
#15
Shuhua Peng, Bat-El Pinchasik, Hao Hao, Helmuth Möhwald, Xuehua Zhang
Constructing controllable liquid patterns with high resolution and accuracy is of great importance in droplet depositions for a range of applications. Simple surface chemical micropatterns have been popularly used to regulate the shape of liquid droplets and the final structure of deposited materials. In this work, we study the morphological evolution of a dissolving femtoliter droplet pinned on multiple microdomains. On the basis of minimization of interfacial energy, the numerical simulations predict various symmetric droplet profiles in equilibrium at different liquid volumes...
January 17, 2017: Journal of Physical Chemistry Letters
https://www.readbyqxmd.com/read/28078628/3d-printed-drugs-for-children-are-we-ready-yet
#16
REVIEW
Maren Preis, Heidi Öblom
The first medicine manufactured by three-dimensional (3D) printing was recently approved by the Food and Drug Administration (FDA). The advantages of printing as a manufacturing route enabling more flexibility regarding the dose, and enlarging individual treatment options, have been demonstrated. There is a particular need for flexible drug delivery solutions when it comes to children. Printing as a new pharmaceutical manufacturing technology brings manufacturing closer to the patient and can easily be adjusted to the required dosing scheme, offering more flexibility for treatments...
January 11, 2017: AAPS PharmSciTech
https://www.readbyqxmd.com/read/28075033/3d-printing-of-transparent-and-conductive-heterogeneous-hydrogel-elastomer-systems
#17
Kevin Tian, Jinhye Bae, Shannon E Bakarich, Canhui Yang, Reece D Gately, Geoffrey M Spinks, Marc In Het Panhuis, Zhigang Suo, Joost J Vlassak
A hydrogel-dielectric elastomer system, polyacrylamide and poly(dimethylsiloxane) (PDMS), is adapted for extrusion printing for integrated device fabrication. A lithium-chloride-containing hydrogel printing ink is developed and printed onto treated PDMS with no visible signs of delamination and geometrically scaling resistance under moderate uniaxial tension and fatigue. A variety of designs are demonstrated, including a resistive strain gauge and an ionic cable.
January 11, 2017: Advanced Materials
https://www.readbyqxmd.com/read/28072944/the-three-dimensional-3d-printing-of-a-flexible-trachea
#18
J Y Young, I C Chao, J C Coles-Black
No abstract text is available yet for this article.
January 2017: Anaesthesia and Intensive Care
https://www.readbyqxmd.com/read/28072573/design-and-application-of-a-structured-phantom-for-detection-performance-comparison-between-breast-tomosynthesis-and-digital-mammography
#19
L Cockmartin, N W Marshall, G Zhang, K Lemmens, E Shaheen, C Van Ongeval, E Fredenberg, D R Dance, E Salvagnini, K Michielsen, H Bosmans
This paper introduces and applies a structured phantom with inserted target objects for the comparison of detection performance of digital breast tomosynthesis (DBT) against 2D full field digital mammography (FFDM). The phantom consists of a 48 mm thick breast-shaped polymethyl methacrylate (PMMA) container filled with water and PMMA spheres of different diameters. Three-dimensionally (3D) printed spiculated masses (diameter range: 3.8-9.7 mm) and non-spiculated masses (1.6-6.2 mm) along with microcalcifications (90-250 µm) were inserted as targets...
January 10, 2017: Physics in Medicine and Biology
https://www.readbyqxmd.com/read/28071597/three-dimensional-printing-of-a-microneedle-array-on-personalized-curved-surfaces-for-dual-pronged-treatment-of-trigger-finger
#20
Seng Han Lim, Jian Yao Ng, Lifeng Kang
The hand function of patients who suffer from trigger finger can be impaired by the use of traditional splints. There is also a risk of systemic side effects with oral non-steroidal anti-inflammatory drugs (NSAIDs) used for pain relief. Microneedle-assisted transdermal drug delivery offers an attractive alternative for local delivery of NSAIDs. However, traditional microneedle arrays fabricated on flat surfaces are unable to deliver drugs effectively across the undulating skin surface of affected finger(s)...
January 10, 2017: Biofabrication
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