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https://www.readbyqxmd.com/read/28339193/3d-printing-techniques-in-environmental-science-and-engineering-will-bring-new-innovation
#1
Ligang Hu, Guibin Jiang
No abstract text is available yet for this article.
March 24, 2017: Environmental Science & Technology
https://www.readbyqxmd.com/read/28330799/from-radiographs-to-3d-printing-how-can-new-surgical-planning-technologies-contribute-to-hip-surgery
#2
EDITORIAL
Xavier Flecher, Henri Migaud
No abstract text is available yet for this article.
March 18, 2017: Orthopaedics & Traumatology, Surgery & Research: OTSR
https://www.readbyqxmd.com/read/28329105/medical-three-dimensional-printing-opens-up-new-opportunities-in-cardiology-and-cardiac-surgery
#3
Thomas Bartel, Andrew Rivard, Alejandro Jimenez, Carlos A Mestres, Silvana Müller
Advanced percutaneous and surgical procedures in structural and congenital heart disease require precise pre-procedural planning and continuous quality control. Although current imaging modalities and post-processing software assists with peri-procedural guidance, their capabilities for spatial conceptualization remain limited in two- and three-dimensional representations. In contrast, 3D printing offers not only improved visualization for procedural planning, but provides substantial information on the accuracy of surgical reconstruction and device implantations...
February 16, 2017: European Heart Journal
https://www.readbyqxmd.com/read/28328842/three-dimensional-printing-and-computer-navigation-assisted-hemipelvectomy-for-en-bloc-resection-of-osteochondroma-a-case-report
#4
Yaqing Zhang, Lianjiang Wen, Jun Zhang, Guoliang Yan, Yue Zhou, Bo Huang
RATIONALE: Three-dimensional (3D) printed templates can be designed to match an individual's anatomy, allowing surgeons to refine preoperative planning. In addition, the use of computer navigation (NAV) is gaining popularity to improve surgical accuracy in the resection of pelvic tumors. However, its use in combination with 3D printing to assist complex pelvic tumor resection has not been reported. PATIENT CONCERNS: A 36-year-old man presented with left-sided pelvic pain and a fast-growing mass...
March 2017: Medicine (Baltimore)
https://www.readbyqxmd.com/read/28328084/control-of-nanoparticle-release-kinetics-from-3d-printed-hydrogel-scaffolds
#5
Bernhard Baumann, Tomasz Jungst, Simone Stichler, Susanne Feineis, Oliver Wiltschka, Matthias Kuhlmann, Mika Lindén, Jürgen Groll
The convergence of biofabrication with nanotechnology is largely unexplored but enables geometrical control of cell-biomaterial arrangement combined with controlled drug delivery and release. As a step towards integration of these two fields of research, this study demonstrates that modulation of electrostatic nanoparticle-polymer and nanoparticle-nanoparticle interactions can be used for tuning nanoparticle release kinetics from 3D printed hydrogel scaffolds. This generic strategy can be used for spatiotemporal control of the release kinetics of nanoparticulate drug vectors in biofabricated constructs...
March 22, 2017: Angewandte Chemie
https://www.readbyqxmd.com/read/28328041/sem-microphotogrammetry-a-new-take-on-an-old-method-for-generating-high-resolution-3d-models-from-sem-images
#6
A D Ball, P A Job, A E L Walker
The method we present here uses a scanning electron microscope programmed via macros to automatically capture dozens of images at suitable angles to generate accurate, detailed three-dimensional (3D) surface models with micron-scale resolution. We demonstrate that it is possible to use these Scanning Electron Microscope (SEM) images in conjunction with commercially available software originally developed for photogrammetry reconstructions from Digital Single Lens Reflex (DSLR) cameras and to reconstruct 3D models of the specimen...
March 22, 2017: Journal of Microscopy
https://www.readbyqxmd.com/read/28327533/flexible-piezoresistive-sensors-embedded-in-3d-printed-tires
#7
Md Omar Faruk Emon, Jae-Won Choi
In this article, we report the development of a flexible, 3D printable piezoresistive pressure sensor capable of measuring force and detecting the location of the force. The multilayer sensor comprises of an ionic liquid-based piezoresistive intermediate layer in between carbon nanotube (CNT)-based stretchable electrodes. A sensor containing an array of different sensing units was embedded on the inner liner surface of a 3D printed tire to provide with force information at different points of contact between the tire and road...
March 22, 2017: Sensors
https://www.readbyqxmd.com/read/28327427/printable-food-the-technology-and-its-application-in-human-health
#8
REVIEW
Jeffrey I Lipton
Millions of Americans suffer from diseases and conditions that require careful control of their diet as part of treatment. The current solution is to have each person customize their own food choices. Food production automation can enable consumer specific data to be easily integrated into the food as it is being prepared. This would improve the quality and utility of the food without a cognitive burden on the consumer. 3D Printing is an ideal family of technologies for enabling such mass customization of food...
March 16, 2017: Current Opinion in Biotechnology
https://www.readbyqxmd.com/read/28326657/ring-shuttling-controls-macroscopic-motion-in-a-three-dimensional-printed-polyrotaxane-monolith
#9
Qianming Lin, Xisen Hou, Chenfeng Ke
Amplification of molecular motions into the macroscopic world has great potential in the development of smart materials. Demonstrated here is an approach that integrates mechanically interlocked molecules into complex three-dimensional (3D) architectures by direct-write 3D printing. The design and synthesis of polypseudorotaxane hydrogels, which are composed of α-cyclodextrins and poly(ethylene oxide)-poly(propylene oxide)-poly(ethylene oxide) (PEO-PPO-PEO) triblock copolymers, and their subsequent fabrication into polyrotaxane-based lattice cubes by 3D printing followed by post-printing polymerization are reported...
March 22, 2017: Angewandte Chemie
https://www.readbyqxmd.com/read/28325671/accurate-fixation-of-plates-and-screws-for-the-treatment-of-acetabular-fractures-using-3d-printed-guiding-templates-an-experimental-study
#10
Xu Chen, Xuanhuang Chen, Guodong Zhang, Haibin Lin, Zhengxi Yu, Changfu Wu, Xing Li, Yijun Lin, Wenhua Huang
OBJECTIVE: To investigate the feasibility of the use of 3D-printed guiding templates for accurate placement of plates and screws for internal fixation of acetabular fractures. METHODS: 3D models of the pelvises of 14 adult cadavers were reconstructed using computed tomography (CT). Twenty-eight acetabular fractures were simulated and placement positions for plates and screw trajectories were designed. Bending module was obtained by 3D cutting; guiding template was manufactured using 3D printing, and the plate was pre-bent according to the bending module...
March 7, 2017: Injury
https://www.readbyqxmd.com/read/28324943/overcoming-spatio-temporal-limitations-using-dynamically-scaled-in-vitro-pc-mri-a-flow-field-comparison-to-true-scale-computer-simulations-of-idealized-stented-and-patient-specific-left-main-bifurcations
#11
Susann Beier, John Ormiston, Mark Webster, John Cater, Stuart Norris, Pau Medrano-Gracia, Alistair Young, Kathleen Gilbert, Brett Cowan
The majority of patients with angina or heart failure have coronary artery disease. Left main bifurcations are particularly susceptible to pathological narrowing. Flow is a major factor of atheroma development, but limitations in imaging technology such as spatio-temporal resolution, signal-to-noise ratio (SNRv), and imaging artefacts prevent in vivo investigations. Computational fluid dynamics (CFD) modelling is a common numerical approach to study flow, but it requires a cautious and rigorous application for meaningful results...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28323743/usefulness-of-3d-printing-to-manage-complex-tracheal-stenosis
#12
Nicolas Guibert, Benjamin Moreno, Christophe Hermant
No abstract text is available yet for this article.
April 2017: Journal of Bronchology & Interventional Pulmonology
https://www.readbyqxmd.com/read/28323175/a-comparative-study-of-bio-inspired-protective-scales-using-3d-printing-and-mechanical-testing
#13
Roberto Martini, Yanis Balit, Francois Barthelat
Flexible natural armors from fish, alligators or armadillo are attracting an increasing amount of attention for their unique combinations of hardness, flexibility and light weight. The extreme contrast of stiffness between hard scales and surrounding soft tissues gives rise to unusual and attractive mechanisms, which now serve as models for the design of bio-inspired armors. Despite this growing interest, there is little guideline for the choice of materials, optimum thickness, size, shape and arrangement for the protective scales...
March 16, 2017: Acta Biomaterialia
https://www.readbyqxmd.com/read/28322552/one-step-fabrication-of-a-microfluidic-device-with-an-integrated-membrane-and-embedded-reagents-by-multimaterial-3d-printing
#14
Feng Li, Petr Smejkal, Niall P Macdonald, Rosanne M Guijt, Michael C Breadmore
One of the largest impediments in the development of microfluidic-based smart sensing systems is the manufacturability of integrated, complex devices. Here, we propose multimaterial 3D printing for the fabrication of such devices in a single step. A microfluidic device containing an integrated porous membrane and embedded liquid reagents was made by 3D printing and applied for the analysis of nitrate from soil. The manufacture of the integrated, sealed device was realised as a single print within 30 min. The body of the device was printed in transparent acrylonitrile butadiene styrene (ABS), and contained a 400 μm wide structure printed from a commercially available composite filament...
March 21, 2017: Analytical Chemistry
https://www.readbyqxmd.com/read/28322290/3d-printed-navigation-template-in-proximal-femoral-osteotomy-for-older-children-with-developmental-dysplasia-of-the-hip
#15
Pengfei Zheng, Peng Xu, Qingqiang Yao, Kai Tang, Yue Lou
To explore the feasibility of 3D-printed navigation template in proximal femoral varus rotation and shortening osteotomy for older children with developmental dysplasia of the hip (DDH). Between June 2014 and May 2015, navigation templates were designed and used for 12 DDH patients. Surgical information and outcomes were compared to 13 patients undergoing the same surgery but without navigation template. In template-guided patient group, operation time (21.08 min vs. 46.92 min), number of X-ray exposures (3...
March 21, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28322047/thiol-ene-monolithic-pepsin-microreactor-with-a-3d-printed-interface-for-efficient-uplc-ms-peptide-mapping-analyses
#16
Alexander Jönsson, Rasmus R Svejdal, Nanna B Bøgelund, Tam T T N Nguyen, Henrik Flindt, Jörg P Kutter, Kasper D Rand, Josiane Penelope Lafleur
To improve the sample handling, and reduce cost and preparation time, of peptide mapping LC-MS workflows in protein analytical research, we here investigate the possibility of replacing conventional enzymatic digestion methods with a polymer microfluidic chip-based enzyme reactor. Off-stoichiometric thiol-ene is utilized as both bulk material and as a monolithic stationary phase for immobilization of the proteolytic enzyme pepsin. The digestion efficiency of the, thiol-ene based, immobilized enzym reactor (IMER) is compared to that of a conventional, agarose packed bed, pepsin IMER column commonly used in LC-MS-based protein analyses...
March 21, 2017: Analytical Chemistry
https://www.readbyqxmd.com/read/28322040/design-and-fabrication-of-a-thin-walled-freeform-scaffold-on-the-basis-of-medical-image-data-and-a-3d-printed-template-potential-use-in-bile-duct-regeneration
#17
Suk Hee Park, Bo-Kyeong Kang, Ji Eun Lee, Seung Woo Chun, Kiseok Jang, Youn Hwan Kim, Mi Ae Jeong, Yohan Kim, Kyo Jin Kang, Nak Kyu Lee, Dongho Choi, Han Joon Kim
Three-dimensional (3D) printing, combined with medical imaging technologies, such as computed tomography (CT) and magnetic resonance imaging (MRI), has shown great potential in patient-specific tissue regeneration. Here, we successfully fabricated an ultrathin tubular freeform structure that has a wall thickness of several tens of micrometers and is capable of providing sufficient mechanical flexibility. Such a thin geometry cannot easily be achieved by 3D printing alone; therefore, it was realized through a serial combination of processes that included the 3D printing of a sacrificial template, the dip-coating of the biomaterial, and the removal of the inner template...
March 21, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/28322012/3d-printed-multidrug-eluting-stent-from-graphene-nanoplatelet-doped-biodegradable-polymer-composite
#18
Santosh K Misra, Fatemeh Ostadhossein, Ramya Babu, Joseph Kus, Divya Tankasala, Andre Sutrisno, Kathleen A Walsh, Corinne R Bromfield, Dipanjan Pan
Patients with percutaneous coronary intervention generally receive either bare metal stents or drug-eluting stents to restore the normal blood flow. However, due to the lack of stent production with an individual patient in mind, the same level of effectiveness may not be possible in treating two different clinical scenarios. This study introduces for the first time the feasibility of a patient-specific stenting process constructed from direct 3D segmentation of medical images using direct 3D printing of biodegradable polymer-graphene composite with dual drug incorporation...
March 21, 2017: Advanced Healthcare Materials
https://www.readbyqxmd.com/read/28320774/3d-bioprint-me-a-socioethical-view-of-bioprinting-human-organs-and-tissues
#19
Niki Vermeulen, Gill Haddow, Tirion Seymour, Alan Faulkner-Jones, Wenmiao Shu
In this article, we review the extant social science and ethical literature on three-dimensional (3D) bioprinting. 3D bioprinting has the potential to be a 'game-changer', printing human organs on demand, no longer necessitating the need for living or deceased human donation or animal transplantation. Although the technology is not yet at the level required to bioprint an entire organ, 3D bioprinting may have a variety of other mid-term and short-term benefits that also have positive ethical consequences, for example, creating alternatives to animal testing, filling a therapeutic need for minors and avoiding species boundary crossing...
March 20, 2017: Journal of Medical Ethics
https://www.readbyqxmd.com/read/28319372/3d-printed-micrometre-scale-polymer-mounts-for-single-crystal-analysis
#20
Niall P Macdonald, Grace L Bunton, Ah Young Park, Michael C Breadmore, Nathan Laird Kilah
3D printed micrometre-scale polymer mounts for single crystal analysis have been prepared by photo polymerization using digital light projection stereolithography (DLP-SLA), with a commercially available digital light projection stereolithography printer (US$4000) and 3DM-ABS resin (US$150 per litre). The polymer mounts were prepared in batches of 49 in 1 hour 15 minutes, which allowed for rapid prototyping and testing of new crystal mounting designs, with a resin cost of 0.2¢ US per mount. The suitability of the 3D printed mounts for single crystal crystallography has been demonstrated through their use in Cu Kα X-ray diffraction experiments of Rochelle salt (sodium potassium tartrate), the protein lysozyme, and has been employed for routine crystallographic analysis of organic and inorganic materials...
March 20, 2017: Analytical Chemistry
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