keyword
MENU ▼
Read by QxMD icon Read
search

3d-printed

keyword
https://www.readbyqxmd.com/read/29141120/biotinylated-photopolymers-for-3d-printed-unibody-lab-on-a-chip-optical-platforms
#1
Caterina Credi, Gianmarco Griffini, Marinella Levi, Stefano Turri
The present work reports the first demonstration of straightforward fabrication of monolithic unibody lab-on-a-chip (ULOCs) integrating bioactive micrometric 3D scaffolds by means of multimaterial stereolithography (SL). To this end, a novel biotin-conjugated photopolymer is successfully synthesized and optimally formulated to achieve high-performance SL-printing resolution, as demonstrated by the SL-fabrication of biotinylated structures smaller than 100 µm. By optimizing a multimaterial single-run SL-based 3D-printing process, such biotinylated microstructures are incorporated within perfusion microchambers whose excellent optical transparency enables real-time optical microscopy analyses...
November 15, 2017: Small
https://www.readbyqxmd.com/read/29141112/multiscale-geometric-design-principles-applied-to-3d-printed-schwarzites
#2
Seyed Mohammad Sajadi, Peter Samora Owuor, Steven Schara, Cristiano F Woellner, Varlei Rodrigues, Robert Vajtai, Jun Lou, Douglas S Galvão, Chandra Sekhar Tiwary, Pulickel M Ajayan
Schwartzites are 3D porous solids with periodic minimal surfaces having negative Gaussian curvatures and can possess unusual mechanical and electronic properties. The mechanical behavior of primitive and gyroid schwartzite structures across different length scales is investigated after these geometries are 3D printed at centimeter length scales based on molecular models. Molecular dynamics and finite elements simulations are used to gain further understanding on responses of these complex solids under compressive loads and kinetic impact experiments...
November 15, 2017: Advanced Materials
https://www.readbyqxmd.com/read/29136932/cell-immobilization-on-3d-printed-matrices-a-model-study-on-propionic-acid-fermentation
#3
Fabricio Dos Santos Belgrano, Olaf Diegel, Nei Pereira, Rajni Hatti-Kaul
This study uses three-dimensional (3D) printing technology as a tool for designing carriers for immobilization of microbial cells for bioprocesses. Production of propionic acid from glucose by immobilized Propionibacterium sp. cells was studied as a model system. For cell adsorption, the 3D-printed nylon beads were added to the culture medium during 3 rounds of cell cultivation. Cell adsorption and fermentation kinetics were similar irrespective of the bead size and lattice structure. The cells bound to 15 mm beads exhibited reduced fermentation time as compared to free cell fermentations; maximum productivity and propionic acid titer of 0...
November 2, 2017: Bioresource Technology
https://www.readbyqxmd.com/read/29134949/pla-short-sub-micron-fiber-reinforcement-of-3d-bioprinted-alginate-constructs-for-cartilage-regeneration
#4
Alicja Kosik-Kozioł, Marco Costantini, Tomasz Bolek, Krisztina Szöke, Andrea Barbetta, Jan Brinchmann, Wojciech Święszkowski
In this study, we present an innovative strategy to reinforce 3D-printed hydrogel constructs for cartilage tissue engineering by formulating composite bioinks containing alginate and short sub-micron polylactide (PLA) fibers. We demonstrate that Young's modulus obtained for pristine alginate constructs (6.9 ± 1.7 kPa) can be increased threefold (up to 25.1 ± 3.8 kPa) with the addition of PLA short fibers. Furthermore, to assess the performance of such materials in cartilage tissue engineering, we loaded the bioinks with human chondrocytes and cultured in vitro the bioprinted constructs for up to 14 days...
November 14, 2017: Biofabrication
https://www.readbyqxmd.com/read/29134773/design-and-biological-functionality-of-a-novel-hybrid-ti-6al-4v-hydrogel-system-for-reconstruction-of-bone-defects
#5
Alok Kumar, K C Nune, R D K Misra
We have designed a unique injectable bioactive hydrogel comprising of alginate, gelatin, and nanocrystalline hydroxyapatite and loaded with osteoblasts, with the ability to infiltrate into three-dimensional Ti-6Al-4V scaffolds with interconnected porous architecture, fabricated by electron beam melting (EBM). A two-step crosslinking process using the EDC/NHS and CaCl2 was adopted and found to be effective in the fabrication of cell-loaded hydrogel/Ti-6Al-4V scaffold system. This hybrid Ti-6Al-4V scaffold/hydrogel system was designed for the reconstruction of bone defects, which are difficult to heal in the absence of suitable support materials...
November 14, 2017: Journal of Tissue Engineering and Regenerative Medicine
https://www.readbyqxmd.com/read/29134412/engineered-bone-scaffolds-with-dielectrophoresis-based-patterning-using-3d-printing
#6
Zhijie Huan, Henry K Chu, Hongbo Liu, Jie Yang, Dong Sun
Patterning of cells into a specific pattern is an important procedure in tissue engineering to facilitate tissue culture and ingrowth. In this paper, a new type of 3D-printed scaffold utilizing dielectrophoresis (DEP) for active cell seeding and patterning was proposed. This scaffold adopted a concentric-ring design that is similar to native bone tissues. The scaffold was fabricated with a commercial three-dimensional (3D) printer. Polylactic Acid (PLA) was selected as the material for the printer and the fabricated scaffold was coated with gold to enhance the conductivity for DEP manipulation...
November 13, 2017: Biomedical Microdevices
https://www.readbyqxmd.com/read/29133915/impact-of-spatial-characteristics-in-the-left-stenotic-coronary-artery-on-the-hemodynamics-and-visualization-of-3d-replica-models
#7
Yang Yang, Xin Liu, Yufa Xia, Xin Liu, Wanqing Wu, Huahua Xiong, Heye Zhang, Lin Xu, Kelvin K L Wong, Hanbin Ouyang, Wenhua Huang
Cardiovascular disease has been the major cause of death worldwide. Although the initiation and progression mechanism of the atherosclerosis are similar, the stenotic characteristics and the corresponding medical decisions are different between individuals. In the present study, we performed anatomic and hemodynamic analysis on 8 left coronary arterial trees with 10 identified stenoses. A novel boundary condition method had been implemented for fast computational fluid dynamics simulations and patient-specific three-dimensional printed models had been built for visualizations...
November 13, 2017: Scientific Reports
https://www.readbyqxmd.com/read/29133713/three-dimensional-model-printing-for-surgery-on-arteriovenous-malformations
#8
Abhidha Shah, Bhavin Jankharia, Atul Goel
AIM: Surgery for intracranial complex vascular malformations can be quite exigent and involves considerable preoperative planning. Here, we present the advantages of using three-dimensional (3D) printed models as a preoperative investigational modality. MATERIAL AND METHODS: 3D printed models were made from thin-slice computed tomography (CT) angiography scans of 6 patients with arteriovenous malformations over an18-month period from August 2015 to December 2016...
November 2017: Neurology India
https://www.readbyqxmd.com/read/29131497/development-of-endothelial-cell-networks-in-3d-tissues-by-combination-of-melt-electrospinning-writing-with-cell-accumulation-technology
#9
Sarah Bertlein, Daichi Hikimoto, Gernot Hochleitner, Julia Hümmer, Tomasz Jungst, Michiya Matsusaki, Mitsuru Akashi, Jürgen Groll
A remaining challenge in tissue engineering approaches is the in vitro vascularization of engineered constructs or tissues. Current approaches in engineered vascularized constructs are often limited in the control of initial vascular network geometry, which is crucial to ensure full functionality of these constructs with regard to cell survival, metabolic activity, and potential differentiation ability. Herein, the combination of 3D-printed poly-ε-caprolactone scaffolds via melt electrospinning writing with the cell-accumulation technique to enable the formation and control of capillary-like network structures is reported...
November 13, 2017: Small
https://www.readbyqxmd.com/read/29131228/3d-printing-in-chemical-engineering-and-catalytic-technology-structured-catalysts-mixers-and-reactors
#10
REVIEW
Cesar Parra-Cabrera, Clement Achille, Simon Kuhn, Rob Ameloot
Computer-aided fabrication technologies combined with simulation and data processing approaches are changing our way of manufacturing and designing functional objects. Also in the field of catalytic technology and chemical engineering the impact of additive manufacturing, also referred to as 3D printing, is steadily increasing thanks to a rapidly decreasing equipment threshold. Although still in an early stage, the rapid and seamless transition between digital data and physical objects enabled by these fabrication tools will benefit both research and manufacture of reactors and structured catalysts...
November 13, 2017: Chemical Society Reviews
https://www.readbyqxmd.com/read/29130836/composite-3d-printed-scaffold-with-structured-electrospun-nanofibers-promotes-chondrocyte-adhesion-and-infiltration
#11
M Rampichová, E Košt'áková Kuželová, E Filová, J Chvojka, J Šafka, M Pelcl, J Daňková, E Prosecká, M Buzgo, M Plencner, D Lukáš, E Amler
Additive manufacturing, also called 3D printing, is an effective method for preparing scaffolds with defined structure and porosity. The disadvantage of the technique is the excessive smoothness of the printed fibers, which does not support cell adhesion. In the present study, a 3D printed scaffold was combined with electrospun classic or structured nanofibers to promote cell adhesion. Structured nanofibers were used to improve the infiltration of cells into the scaffold. Electrospun layers were connected to 3D printed fibers by gluing, thus enabling the fabrication of scaffolds with unlimited thickness...
November 13, 2017: Cell Adhesion & Migration
https://www.readbyqxmd.com/read/29129573/3d-printed-uv-light-cured-polydimethylsiloxane-devices-for-drug-delivery
#12
Jenny Holländer, Risto Hakala, Jaakko Suominen, Niko Moritz, Jouko Yliruusi, Niklas Sandler
The goal of this work was to study the printability of PDMS with a semi-solid extrusion printer in combination with the UV-assisted crosslinking technology using UV-LED light to manufacture drug containing structures. Structures with different pore sizes and different drug loadings were prepared containing prednisolone as a model drug. The work showed that it was possible to print drug-free and drug-loaded drug delivery devices of PDMS with the 3D printing technique used in this study. The required UV-curing time to get sufficient crosslinking yield and mechanical strength was minimum three minutes...
November 9, 2017: International Journal of Pharmaceutics
https://www.readbyqxmd.com/read/29129522/increasing-the-safety-of-surgical-treatment-for-complex-cranio-vertebral-anomalies-using-customized-3d-printed-models
#13
Kataria Rashim, K Verma Pawan, V D Sinha
Surgery for the Cranio-vertebral (CV) junction anomalies using top loading subocciput (C0)/C1-C2 screws is difficult and requires high level of skill and expertise. This is because of complex abnormal anatomy in that region and other issues including the instrumentation. Thorough knowledge of the 3D anatomy of the Craniovertebral junction of the patient is essential for favourable outcome. The customised 3D printed model of CV junction region of the patient can be used for studying the anatomy and relationship of vertebral artery to the C1-C2 joint before the actual surgery...
November 9, 2017: Journal of Clinical Neuroscience: Official Journal of the Neurosurgical Society of Australasia
https://www.readbyqxmd.com/read/29129026/micromechanical-study-of-the-load-transfer-in-a-polycaprolactone-collagen-hybrid-scaffold-when-subjected-to-unconfined-and-confined-compression
#14
A P G Castro, D Lacroix
Scaffolds are used in diverse tissue engineering applications as hosts for cell proliferation and extracellular matrix formation. One of the most used tissue engineering materials is collagen, which is well known to be a natural biomaterial, also frequently used as cell substrate, given its natural abundance and intrinsic biocompatibility. This study aims to evaluate how the macroscopic biomechanical stimuli applied on a construct made of polycaprolactone scaffold embedded in a collagen substrate translate into microscopic stimuli at the cell level...
November 11, 2017: Biomechanics and Modeling in Mechanobiology
https://www.readbyqxmd.com/read/29128598/histological-and-radiological-evaluation-of-subcutaneous-implants-in-mouse-of-a-3d-printable-material-fulcure-720-and-experimental-application-in-mandibular-reconstruction
#15
J Megías Barrera, L García-Consuegra, A Novoa, S Costilla, S Junquera, G Ascani
INTRODUCTION: The aim of this study was to evaluate the bioactivity of FullCure compared to porous polyethylene implants (Medpor) in rats prior to custom-made scaffold support manufacturing for mandible segmental defects (MSD) reconstruction in sheep. METHODS: 12 Fullcure and Medpor laminaes were implanted in the left and right dorsum respectively of 6 wistar rats. Toxicity was assessed by skin, kidney and liver histopathology 3 months post-implantation. Computed Tomography (CT) was carried out in order to assess radiological differences between implants...
November 8, 2017: Journal of Stomatology, Oral and Maxillofacial Surgery
https://www.readbyqxmd.com/read/29128162/three-dimensionally-printed-personalized-guide-plate-for-percutaneous-radiofrequency-thermal-coagulation-in-idiopathic-trigeminal-neuralgia
#16
M Deng, H Cai, W Fang, X Long
Radiofrequency thermocoagulation (RFT) is used widely for the treatment of idiopathic trigeminal neuralgia (TN). Precise puncture and placement of the electrode needle tip are crucial for successful RFT. This technical note introduces a novel method for performing RFT using a customized, three-dimensionally (3D)-printed guide plate. Eleven patients with idiopathic TN were treated using this method between February and July 2016. Three had V2 branch TN and eight had V3 branch TN. Punctures in eight patients were successful at the first attempt; slight adjustments were required subsequently in the other three patients...
November 8, 2017: International Journal of Oral and Maxillofacial Surgery
https://www.readbyqxmd.com/read/29127451/development-and-validation-of-3d-printed-virtual-models-for-robot-assisted-radical-prostatectomy-and-partial-nephrectomy-urologists-and-patients-perception
#17
Francesco Porpiglia, Riccardo Bertolo, Enrico Checcucci, Daniele Amparore, Riccardo Autorino, Prokar Dasgupta, Peter Wiklund, Ashutosh Tewari, Evangelos Liatsikos, Cristian Fiori
PURPOSE: To test the face and content validity of 3D virtual-rendered printed models used before robot-assisted prostate cancer and nephron-sparing surgery. METHODS: Patients who underwent live surgery during an international urological meeting organized in January 2017 were enrolled. Those with organ-confined prostate cancer underwent robot-assisted radical prostatectomy. Patients with a single renal tumor underwent minimally invasive nephron-sparing surgery. High-resolution (HR) imaging was obtained for all patients...
November 10, 2017: World Journal of Urology
https://www.readbyqxmd.com/read/29127293/three-dimensional-printed-polylactic-acid-hydroxyapatite-composite-scaffolds-for-prefabricating-vascularized-tissue-engineered-bone-an-in-vivo-bioreactor-model
#18
Haifeng Zhang, Xiyuan Mao, Danyang Zhao, Wenbo Jiang, Zijing Du, Qingfeng Li, Chaohua Jiang, Dong Han
The repair of large bone defects with complex geometries remains a major clinical challenge. Here, we explored the feasibility of fabricating polylactic acid-hydroxyapatite (PLA-HA) composite scaffolds. These scaffolds were constructed from vascularized tissue engineered bone using an in vivo bioreactor (IVB) strategy with three-dimensional printing technology. Specifically, a rabbit model was established to prefabricate vascularized tissue engineered bone in two groups. An experimental group (EG) was designed using a tibial periosteum capsule filled with 3D printed (3DP) PLA-HA composite scaffolds seeded with bone marrow stromal cells (BMSCs) and crossed with a vascular bundle...
November 10, 2017: Scientific Reports
https://www.readbyqxmd.com/read/29125277/3d-printed-hierarchical-porous-frameworks-for-sodium-storage
#19
Junwei Ding, Kai Shen, Zhiguo Du, Bin Li, Shubin Yang
Exploring 3D printing to the field of sodium ion batteries is a great challenge since conventionally inks cause unavoidably compact filaments or frameworks, which significantly hamper the infiltration of electrolyte and diffusion of big-size sodium ions (1.02 Å), resulting in low reversible capacities. Here, new hierarchical porous frameworks are 3D printed for sodium storage by employing well-designed GO-contained inks. The resultant frameworks possess continuous filaments, hierarchical multihole gridding...
November 10, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/29125200/refreshing-rubbers-as-customized-photothermal-conversion-materials-through-post-darkening-modeling-production
#20
Ruiting Li, Zhen Wang, Peng Han, Yonglin He, Xiaohong Zhang, Yapei Wang
Organic conjugated polymers with low energy bandgap are rising as a particular class of NIR photothermal conversion materials. Yet these polymers routinely possess high phase transition temperature due to the rigid skeleton and strong intermolecular interaction. Rarely conjugated polymers can be thermally processed at low temperature, especially below 100°C. This work formulates a concept of post-darkening modeling production (p-DMP) by which the thermoplastic non-conjugated trans-polyisoprene (TPI) is refreshed into a photo-thermal conversion material with high light use efficiency...
November 10, 2017: Chemistry: a European Journal
keyword
keyword
77921
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"