keyword
MENU ▼
Read by QxMD icon Read
search

3d printer

keyword
https://www.readbyqxmd.com/read/28436920/hybrid-3d-printing-and-electrodeposition-approach-for-controllable-3d-alginate-hydrogel-formation
#1
Wanfeng Shang, Yanting Liu, Wenfeng Wan, Chengzhi Hu, Zeyang Liu, Chin To Wong, Toshio Fukuda, Yajing Shen
Calcium alginate hydrogel is one of the most widely used biocompatible materials in biomedical and tissue engineering. This paper reports a hybrid 3D printing and electrodeposition approach to form the 3D calcium alginate hydrogel in a controllable manner. Firstly, a specific 3D printing system is developed by combining a 3D printer and a customized ejection syringe. Then, the mixed solution (1% w/v sodium alginate and 0.25% w/v CaCO3 nano particles) is filled in the syringe and ejected out from the nozzle to the substrate continuously...
April 24, 2017: Biofabrication
https://www.readbyqxmd.com/read/28425999/three-dimensional-printing-of-transparent-fused-silica-glass
#2
Frederik Kotz, Karl Arnold, Werner Bauer, Dieter Schild, Nico Keller, Kai Sachsenheimer, Tobias M Nargang, Christiane Richter, Dorothea Helmer, Bastian E Rapp
Glass is one of the most important high-performance materials used for scientific research, in industry and in society, mainly owing to its unmatched optical transparency, outstanding mechanical, chemical and thermal resistance as well as its thermal and electrical insulating properties. However, glasses and especially high-purity glasses such as fused silica glass are notoriously difficult to shape, requiring high-temperature melting and casting processes for macroscopic objects or hazardous chemicals for microscopic features...
April 19, 2017: Nature
https://www.readbyqxmd.com/read/28420749/inner-workings-3d-printer-innovations-tackle-complexity-of-metamaterials-living-tissue
#3
Katherine Bourzac
No abstract text is available yet for this article.
April 18, 2017: Proceedings of the National Academy of Sciences of the United States of America
https://www.readbyqxmd.com/read/28420248/creating-an-optimal-3d-printed-model-for-temporal-bone-dissection-training
#4
Kuniyuki Takahashi, Yuka Morita, Shinsuke Ohshima, Shuji Izumi, Yamato Kubota, Yutaka Yamamoto, Sugata Takahashi, Arata Horii
OBJECTIVE: Making a 3-dimensional (3D) temporal bone model is simple using a plaster powder bed and an inkjet printer. However, it is difficult to reproduce air-containing spaces and precise middle ear structures. The objective of this study was to overcome these problems and create a temporal bone model that would be useful both as a training tool and for preoperative simulation. METHODS: Drainage holes were made to remove excess materials from air-containing spaces, ossicle ligaments were manually changed to bony structures, and small and/or soft tissue structures were colored differently while designing the 3D models...
April 1, 2017: Annals of Otology, Rhinology, and Laryngology
https://www.readbyqxmd.com/read/28420152/measurement-of-pressure-fluctuations-inside-a-model-thrust-bearing-using-pvdf-sensors
#5
Andrew Youssef, David Matthews, Andrew Guzzomi, Jie Pan
Thrust bearings play a vital role in propulsion systems. They rely on a thin layer of oil being trapped between rotating surfaces to produce a low friction interface. The "quality" of this bearing affects many things from noise transmission to the ultimate catastrophic failure of the bearing itself. As a result, the direct measure of the forces and vibrations within the oil filled interface would be very desirable and would give an indication of the condition of the bearing in situ. The thickness of the oil film is, however, very small and conventional vibration sensors are too cumbersome to use in this confined space...
April 16, 2017: Sensors
https://www.readbyqxmd.com/read/28406192/inkjet-printing-based-volumetric-display-projecting-multiple-full-colour-2d-patterns
#6
Ryuji Hirayama, Tomotaka Suzuki, Tomoyoshi Shimobaba, Atsushi Shiraki, Makoto Naruse, Hirotaka Nakayama, Takashi Kakue, Tomoyoshi Ito
In this study, a method to construct a full-colour volumetric display is presented using a commercially available inkjet printer. Photoreactive luminescence materials are minutely and automatically printed as the volume elements, and volumetric displays are constructed with high resolution using easy-to-fabricate means that exploit inkjet printing technologies. The results experimentally demonstrate the first prototype of an inkjet printing-based volumetric display composed of multiple layers of transparent films that yield a full-colour three-dimensional (3D) image...
April 13, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28392038/the-emerging-role-of-3-dimensional-printing-in%C3%A2-rhinology
#7
REVIEW
Janalee K Stokken, John F Pallanch
Nasal septal perforations, particularly those that are large and irregular in shape, often present as challenging surgical dilemmas. New technology has allowed us to develop techniques using computed tomography imaging and 3-dimensional (3D) printers to design custom polymeric silicone septal buttons. These buttons offer patients an option that avoids a surgical intervention when standard buttons do not fit well or are not tolerated. Preliminary data suggest that buttons designed by 3D printer technology provide more comfort than standard commercially available or hand-carved buttons with equivalent reduction of symptoms...
April 6, 2017: Otolaryngologic Clinics of North America
https://www.readbyqxmd.com/read/28387500/effect-of-3d-printed-microvascular-network-design-on-the-self-healing-behavior-of-cross-linked-polymers
#8
G Postiglione, M Alberini, S Leigh, M Levi, S Turri
This article describes the manufacturing procedure and the characterization of self-healing polymers based on embedded microvascular networks. The samples were realized by resin casting into water-soluble PVA molds, fabricated via 3D printing. This technology allowed us to exploit the 3D printers' ability to produce complex structures with high resolution for the creation of independent microchannels networks. The two reacting components of a two-part resin could be stored separately within the microstructure...
April 12, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/28386686/3d-digitization-and-prototyping-of-the-skull-for-practical-use-in-the-teaching-of-human-anatomy
#9
Maria Teresa Ugidos Lozano, Fernando Blaya Haro, Carlos Molino Diaz, Sadia Manzoor, Gonzalo Ferrer Ugidos, Juan Antonio Juanes Mendez
The creation of new rapid prototyping techniques, low cost 3D printers as well as the creation of new software for these techniques have allowed the creation of 3D models of bones making their application possible in the field of teaching anatomy in the faculties of Health Sciences. The 3D model of cranium created in the present work, at full scale, present accurate reliefs and anatomical details that are easily identifiable by undergraduate students in their use for the study of human anatomy. In this article, the process of scanning the skull and the subsequent treatment of these images with specific software until the generation of 3D model using 3D printer has been reported...
May 2017: Journal of Medical Systems
https://www.readbyqxmd.com/read/28381788/evaluation-of-3d-printer-accuracy-in-producing-fractal-structure
#10
Kana Kikegawa, Kyuuichirou Takamatsu, Masaru Kawakami, Hidemitsu Furukawa, Hiroyuki Mayama, Yoshimune Nonomura
Hierarchical structures, also known as fractal structures, exhibit advantageous material properties, such as water- and oil-repellency as well as other useful optical characteristics, owing to its self-similarity. Various methods have been developed for producing hierarchical geometrical structures. Recently, fractal structures have been manufactured using a 3D printing technique that involves computer-aided design data. In this study, we confirmed the accuracy of geometrical structures when Koch curve-like fractal structures with zero to three generations were printed using a 3D printer...
2017: Journal of Oleo Science
https://www.readbyqxmd.com/read/28377316/preparation-and-investigation-of-controlled-release-glipizide-novel-oral-device-with-three-dimensional-printing
#11
Qijun Li, Haoyang Wen, Danyang Jia, Xiaoying Guan, Hao Pan, Yue Yang, Shihui Yu, Zhihong Zhu, Rongwu Xiang, Weisan Pan
The purpose of this study was to explore the feasibility of combining fused deposition modeling (FDM) 3D printing technology with hot melt extrusion (HME) to fabricate a novel controlled-release drug delivery device. Glipizide used in the treatment of diabetes was selected as model drug, and was successfully loaded into commercial polyvinyl alcohol (PVA) filaments by HME method. The drug-loaded filaments were printed through a dual-nozzle 3D printer, and finally formed a double-chamber device composed by a tablet embedded within a larger tablet (DuoTablet), each chamber contains different contents of glipizide...
April 2, 2017: International Journal of Pharmaceutics
https://www.readbyqxmd.com/read/28366210/3d-printed-led-based-on-capillary-detector-housing-with-integrated-slit
#12
Farhan Cecil, Min Zhang, Rosanne M Guijt, Alan Henderson, Pavel N Nesterenko, Brett Paull, Michael C Breadmore, Mirek Macka
A 3D printed photometric detector body with integrated slit was fabricated to position a LED and photodiode either side of capillary tubing using a fused deposition modelling (FDM) printer. To make this approach suitable for capillaries down to 50 μm i.d. the dimension of the in-built slit is the critical element of the printed housing. The spatial orientation of the model for printing was found to significantly impact on the resolution of the structures and voids that can be printed. By designing a housing with a slit positioned in the XY plane in parallel with the print direction, the narrowest void (slit) that could be printed was 70 μm...
May 1, 2017: Analytica Chimica Acta
https://www.readbyqxmd.com/read/28362403/3d-printing-of-biomolecular-models-for-research-and-pedagogy
#13
Eduardo Da Veiga Beltrame, James Tyrwhitt-Drake, Ian Roy, Raed Shalaby, Jakob Suckale, Daniel Pomeranz Krummel
The construction of physical three-dimensional (3D) models of biomolecules can uniquely contribute to the study of the structure-function relationship. 3D structures are most often perceived using the two-dimensional and exclusively visual medium of the computer screen. Converting digital 3D molecular data into real objects enables information to be perceived through an expanded range of human senses, including direct stereoscopic vision, touch, and interaction. Such tangible models facilitate new insights, enable hypothesis testing, and serve as psychological or sensory anchors for conceptual information about the functions of biomolecules...
March 13, 2017: Journal of Visualized Experiments: JoVE
https://www.readbyqxmd.com/read/28361165/accuracy-of-stereolithographically-printed-digital-models-compared-to-plaster-models
#14
Leonardo Tavares Camardella, Oswaldo V Vilella, Marleen M van Hezel, Karel H Breuning
OBJECTIVE: This study compared the accuracy of plaster models from alginate impressions and printed models from intraoral scanning. MATERIALS AND METHODS: A total of 28 volunteers were selected and alginate impressions and intraoral scans were used to make plaster models and digital models of their dentition, respectively. The digital models were printed using a stereolithographic (SLA) 3D printer with a horseshoe-shaped design. Two calibrated examiners measured distances on the plaster and printed models with a digital caliper...
March 30, 2017: Journal of Orofacial Orthopedics, Fortschritte der Kieferorthopädie
https://www.readbyqxmd.com/read/28351222/bone-regenerative-medicine-in-oral-and-maxillofacial-region-using-a-3d-printer
#15
Atsuhiko Hikita, Ung-Il Chung, Kazuto Hoshi, Tsuyoshi Takato
Bone grafts currently used for the treatment of large bone defect or asymmetry in oral and maxillofacial region include autologous, allogenic and artificial bones. Although artificial bone is free from the concerns of donor site morbidity, limitation of volume, disease transmission and ethical issues, it lacks osteogenic and osteoinductive activities. In addition, molding of the artificial bone is an issue especially when it is used for the augmentation of bone as onlay grafts. To solve this problem, additive manufacturing techniques have been applied to fabricate bones which have outer shapes conformed to patients' bones...
March 29, 2017: Tissue Engineering. Part A
https://www.readbyqxmd.com/read/28337397/development-and-application-of-a-brush-spray-derived-from-a-calligraphy-brush-style-synthetic-hair-pen-for-use-in-esi-ms
#16
Jen-Ying Liu, Pei-Chun Chen, Yea-Wenn Liou, Kai-Yin Chang, Cheng-Huang Lin
The development of a novel type of a sampling/ionization kit for use in electrospray ionization/mass spectrometry is reported. Using a small calligraphy-brush-style synthetic hair pen (nylon-brush), and analogous to paper-spray mass spectrometry, the analytes can be collected, elution/desorption and then ionized from the surface of the nylon-brush. The body of the kit was produced by means of a commercial 3D-printer, in which ABS (acrylonitrile butadiene styrene) was used as the starting material. Meanwhile, a small nylon-brush was embedded inside a 3D-printed plastic cell, in which a solvent was supplied to rinse the brush by means of capillary action...
2017: Mass Spectrometry
https://www.readbyqxmd.com/read/28327469/total-body-irradiation-with-a-compensator-fabricated-using-a-3d-optical-scanner-and-a-3d-printer
#17
So-Yeon Park, Jung-In Kim, Yoon Ha Joo, Jung Chan Lee, Jong Min Park
We propose bilateral total body irradiation (TBI) utilizing a 3D printer and a 3D optical scanner. We acquired surface information of an anthropomorphic phantom with the 3D scanner and fabricated the 3D compensator with the 3D printer, which could continuously compensate for the lateral missing tissue of an entire body from the beam's eye view. To test the system's performance, we measured doses with optically stimulated luminescent dosimeters (OSLDs) as well as EBT3 films with the anthropomorphic phantom during TBI without a compensator, conventional bilateral TBI, and TBI with the 3D compensator (3D TBI)...
March 22, 2017: Physics in Medicine and Biology
https://www.readbyqxmd.com/read/28319372/3d-printed-micrometer-scale-polymer-mounts-for-single-crystal-analysis
#18
Niall P Macdonald, Grace L Bunton, Ah Young Park, Michael C Breadmore, Nathan L Kilah
3D printed micrometer-scale polymer mounts for single crystal analysis have been prepared by photopolymerization 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 liter). The polymer mounts were prepared in batches of 49 in 1 h 15 min, 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 30, 2017: Analytical Chemistry
https://www.readbyqxmd.com/read/28318927/classical-versus-custom-orbital-wall-reconstruction-selected-factors-regarding-surgery-and-hospitalization
#19
Rafał Zieliński, Marta Malińska, Marcin Kozakiewicz
PURPOSE: Nowadays, in orbital wall reconstruction, maxillofacial surgeons have the possibility to treat patients in modern ways such as with individual implants. Nevertheless, conventional treatment including standard titanium mesh shaped during the surgical procedure is also widely used. The aim of this study was to compare the above methods of orbital wall reconstructions. MATERIALS AND METHODS: In the first group (39 cases), patients were treated by means of computer-aided design/computer-aided manufacturing (CAD/CAM) milled individual implants made of ultra-high-molecular-weight polyethylene, dioxide zirconium and rapid prototyping titanium mesh pre-bent on an ABS model made by a three-dimensional (3D) printer...
February 17, 2017: Journal of Cranio-maxillo-facial Surgery
https://www.readbyqxmd.com/read/28295413/using-a-handheld-stereo-depth-camera-to-overcome-limited-field-of-view-in-simulation-imaging-for-radiation-therapy-treatment-planning
#20
Cesare Jenkins, Lei Xing, Amy Yu
PURPOSE: A correct body contour is essential for reliable treatment planning in radiation therapy. While modern medical imaging technologies provide highly accurate patient modeling, there are times when a patient's anatomy cannot be fully captured or there is a lack of easy access to computed tomography (CT) simulation. Here, we provide a practical solution to the surface contour truncation problem by using a handheld stereo depth camera (HSDC) to obtain the missing surface anatomy and a surface-surface image registration to stich the surface data into the CT dataset for treatment planning...
March 11, 2017: Medical Physics
keyword
keyword
84801
1
2
Fetch more papers »
Fetching more papers... Fetching...
Read by QxMD. Sign in or create an account to discover new knowledge that matter to you.
Remove bar
Read by QxMD icon Read
×

Search Tips

Use Boolean operators: AND/OR

diabetic AND foot
diabetes OR diabetic

Exclude a word using the 'minus' sign

Virchow -triad

Use Parentheses

water AND (cup OR glass)

Add an asterisk (*) at end of a word to include word stems

Neuro* will search for Neurology, Neuroscientist, Neurological, and so on

Use quotes to search for an exact phrase

"primary prevention of cancer"
(heart or cardiac or cardio*) AND arrest -"American Heart Association"