keyword
MENU ▼
Read by QxMD icon Read
search

3 dimension print

keyword
https://www.readbyqxmd.com/read/29782142/projection-based-3d-printing-of-cell-patterning-scaffolds-with-multi-scale-channels
#1
Dai Xue, Yancheng Wang, Jiaxin Zhang, Deqing Mei, Yue Wang, Shaochen Chen
To fully actualize artificial, cell-laden biological models in tissue engineering, such as 3D organoids and organs-on-a-chip systems, cells need to be patterned such that they can precisely mimic natural microenvironments in vitro. Despite increasing interest in this area, patterning cells at multiscales (~10 μm - 10 mm) remains a significant challenge in bioengineering. Here we report a projection-based 3D printing system that achieves rapid and high-resolution fabrication of hydrogel scaffolds featuring intricate channels for multi-scale cell patterning...
May 21, 2018: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/29768115/three-dimensional-printing-of-vitrification-loop-prototypes-for-aquatic-species
#2
Nolan J Tiersch, William M Childress, Terrence R Tiersch
Vitrification is a method of cryopreservation that freezes samples rapidly, while forming an amorphous solid ("glass"), typically in small (μL) volumes. The goal of this project was to create, by three-dimensional (3D) printing, open vitrification devices based on an elliptical loop that could be efficiently used and stored. Vitrification efforts can benefit from the application of 3D printing, and to begin integration of this technology, we addressed four main variables: thermoplastic filament type, loop length, loop height, and method of loading...
May 16, 2018: Zebrafish
https://www.readbyqxmd.com/read/29685857/three-dimensional-printing-as-a-technology-supporting-the-treatment-of-lower-limb-deformity-and-shortening-with-the-ilizarov-method
#3
Piotr Morasiewicz, Karolina Burzyńska, Wiktor Orzechowski, Szymon Łukasz Dragan, Szymon Feliks Dragan, Jarosław Filipiak
BACKGROUND: Treatment of multiplanar deformities, especially in younger children, requires construction of a complex Ilizarov fixator, frequently with small dimensions. The aim of this study is to verify clinical application of a3D-printed bone model in treatment with the Ilizarov method. METHODS: The study involved a 6-year-old child in whom clinical and radiological examination revealed multiplanar deformity of the right leg. Then, 3D models of individual bones were printed by means of additive manufacturing and were used as a scaffold to install the Ilizarov apparatus...
April 20, 2018: Medical Engineering & Physics
https://www.readbyqxmd.com/read/29550378/in-vivo-tooth-supported-implant-surgical-guides-fabricated-with-desktop-stereolithographic-printers-fully-guided-surgery-is-more-accurate-than-partially-guided-surgery
#4
Sompop Bencharit, Adam Staffen, Matthew Yeung, Daniel Whitley, Daniel M Laskin, George R Deeb
PURPOSE: Desktop stereolithographic printers combined with intraoral scanning and implant planning software promise precise and cost-effective guided implant surgery. The purpose of the present study was to determine the overall range of accuracy of tooth-supported guided implant surgery using desktop printed stereolithographic guides. MATERIALS AND METHODS: A cross-sectional study comparing fully and partially guided implant surgery was conducted. Preoperative cone beam computed tomography (CBCT) and intraoral scans were used to plan the implant sites...
February 21, 2018: Journal of Oral and Maxillofacial Surgery
https://www.readbyqxmd.com/read/29526301/digital-design-of-patient-specific-abutments-for-the-retention-of-implant-retained-facial-prostheses
#5
Carolyn Kincade, Lindsay McHutchion, Johan Wolfaardt
The present report describes the digital design of patient-specific milled abutments for the retention of osseointegrated facial prostheses by using digital technology. Patient imaging including surface scans of the patient's head, scans of the patient's definitive cast, and digitally designed prosthesis prototypes were combined to create a digital simulation of the patient. Using this simulation, patient-specific abutments were digitally designed, printed in 3-dimensions (3D), and finally copy-milled in titanium...
March 8, 2018: Journal of Prosthetic Dentistry
https://www.readbyqxmd.com/read/29524294/development-of-clinically-relevant-qa-procedures-for-the-brainlab-exactrac-imaging-system
#6
Ileana Iftimia, Per H Halvorsen
PURPOSE: The aim of this study was to develop Quality Assurance procedures for the BrainLab ExacTrac (ET) imaging system following the TG 142 recommendations for planar kV imaging systems. MATERIALS AND METHODS: A custom-designed 3D printed holder was used to position the Standard Imaging QCkV-1 phantom at isocenter, facing the ET X ray tubes. The linac's light field (collimator at 45⁰) was used to position the phantom holder. The ET images were exported to ARIA where geometric distortion was checked...
March 10, 2018: Journal of Applied Clinical Medical Physics
https://www.readbyqxmd.com/read/29475322/1-65-mm-diameter-forward-viewing-confocal-endomicroscopic-catheter-using-a-flip-chip-bonded-electrothermal-mems-fiber-scanner
#7
Yeong-Hyeon Seo, Kyungmin Hwang, Ki-Hun Jeong
We report a 1.65 mm diameter forward-viewing confocal endomicroscopic catheter using a flip-chip bonded electrothermal MEMS fiber scanner. Lissajous scanning was implemented by the electrothermal MEMS fiber scanner. The Lissajous scanned MEMS fiber scanner was precisely fabricated to facilitate flip-chip connection, and bonded with a printed circuit board. The scanner was successfully combined with a fiber-based confocal imaging system. A two-dimensional reflectance image of the metal pattern 'OPTICS' was successfully obtained with the scanner...
February 19, 2018: Optics Express
https://www.readbyqxmd.com/read/29452866/intrapatient-study-comparing-3d-printed-bolus-versus-standard-vinyl-gel-sheet-bolus-for-postmastectomy-chest-wall-radiation-therapy
#8
James L Robar, Kathryn Moran, James Allan, James Clancey, Tami Joseph, Krista Chytyk-Praznik, R Lee MacDonald, John Lincoln, Parisa Sadeghi, Robert Rutledge
PURPOSE: This patient study evaluated the use of 3-dimensional (3D) printed bolus for chest wall radiation therapy compared with standard sheet bolus with regard to accuracy of fit, surface dose measured in vivo, and efficiency of patient setup. By alternating bolus type over the course of therapy, each patient served as her own control. METHODS AND MATERIALS: For 16 patients undergoing chest wall radiation therapy, a custom 5.0 mm thick bolus was designed based on the treatment planning computed tomography scan and 3D printed using polylactic acid...
December 24, 2017: Practical Radiation Oncology
https://www.readbyqxmd.com/read/29407508/accuracy-of-bracket-positions-with-a-cad-cam-indirect-bonding-system-in-posterior-teeth-with-different-cusp-heights
#9
Jiyeon Kim, Youn-Sic Chun, Minji Kim
INTRODUCTION: Our objective was to evaluate the effect of cusp height of posterior teeth (first premolar, second premolar, first molar) on the accuracy of the computer-aided design and computer-aided manufacturing (CAD-CAM) indirect bonding system. MATERIAL: Five kinds of maxillary arch models, without attrition, were divided into 2 groups: control group (with 0.5 mm of grinding) and experimental group (with the addition of 0.5 mm of wax to the cusp tip). Rapid prototype models were printed for both groups...
February 2018: American Journal of Orthodontics and Dentofacial Orthopedics
https://www.readbyqxmd.com/read/29346173/the-subresolution-datscan-phantom-a-cost-effective-flexible-alternative-to-traditional-phantom-technology
#10
Jonathan C Taylor, Nicholas Vennart, Ian Negus, Robin Holmes, Oliver Bandmann, Christine Lo, John Fenner
The Alderson striatal phantom is frequently used to assess I-FP-CIT (Ioflupane) image quality and to test semi-quantification software. However, its design is associated with a number of limitations, in particular: unrealistic image appearances and inflexibility. A new physical phantom approach is proposed on the basis of subresolution phantom technology. The design incorporates thin slabs of attenuating material generated through additive manufacturing, and paper sheets with radioactive ink patterns printed on their surface, created with a conventional inkjet printer...
March 2018: Nuclear Medicine Communications
https://www.readbyqxmd.com/read/29337695/automated-fabrication-of-photopatterned-gelatin-hydrogels-for-organ-on-chips-applications
#11
Janna C Nawroth, Lisa L Scudder, Ryan T Halvorson, Jason Tresback, John P Ferrier, Sean P Sheehy, Alex Cho, Suraj Kannan, Ilona Sunyovszki, Josue A Goss, Patrick H Campbell, Kevin Kit Parker
Organ-on-chip platforms aim to improve preclinical models for organ-level responses to novel drug compounds. Heart-on-a-chip assays in particular require tissue engineering techniques that rely on labor-intensive photolithographic fabrication or resolution-limited 3D printing of micropatterned substrates, which limits turnover and flexibility of prototyping. We present a rapid and automated method for large scale on-demand micropatterning of gelatin hydrogels for organ-on-chip applications using a novel biocompatible laser-etching approach...
January 16, 2018: Biofabrication
https://www.readbyqxmd.com/read/29302489/enhancing-breast-projection-in-autologous-reconstruction-using-the-st-andrew-s-coning-technique-and-3d-volumetric-analysis
#12
Michael P Chae, Warren Matthew Rozen, Nakul Gamanlal Patel, David J Hunter-Smith, Venkat Ramakrishnan
Background: An increasing number of women undergo mastectomy for breast cancer and post-mastectomy autologous breast reconstruction has been shown to significantly improve the psychosexual wellbeing of the patients. A goal of treatment is to achieve symmetry and projection to match the native breast, and/or the contralateral breast in the case of a unilateral reconstruction. Autologous reconstruction, particularly with the deep inferior epigastric artery perforator (DIEP) flap, is particularly advantageous as it can be manipulated to mimic the shape and turgor of the native breast...
December 2017: Gland Surgery
https://www.readbyqxmd.com/read/29300411/customizing-polyelectrolyte-complex-shapes-through-photolithographic-directed-assembly
#13
Udaka K de Silva, Kunal Choudhuri, Amanda C Bryant-Friedrich, Yakov Lapitsky
Polyelectrolyte complexes (PECs) form through the association of oppositely charged polymers and, due to their attractive properties, such as their mild/simple preparation and stimulus-sensitivity, attract widespread interest. The diverse applications of these materials often require control over PEC shapes. As a versatile approach to achieving such control, we report a new photolithographic directed assembly method for tailoring their structure. This method uses aqueous solutions of a polyelectrolyte, an oppositely charged monomer and a photoinitiator...
January 24, 2018: Soft Matter
https://www.readbyqxmd.com/read/29282550/bioactive-calcium-silicate-poly-%C3%AE%C2%B5-caprolactone-composite-scaffolds-3d-printed-under-mild-conditions-for-bone-tissue-engineering
#14
Yen-Hong Lin, Yung-Cheng Chiu, Yu-Fang Shen, Yuan-Haw Andrew Wu, Ming-You Shie
The present study provides a solvent-free processing method for establishing the ideal porous 3-dimension (3D) scaffold filled with different ratios of calcium silicate-based (CS) powder and polycaprolactone (PCL) for 3D bone substitute application. Characterization of hybrid scaffolds developed underwent assessments for physicochemical properties and biodegradation. Adhesion and growth of human Wharton's Jelly mesenchymal stem cells (WJMSCs) on the CS/PCL blended scaffold were investigated in vitro. Cell attachment and morphology were examined by scanning electron microscope (SEM) and confocal microscope observations...
December 27, 2017: Journal of Materials Science. Materials in Medicine
https://www.readbyqxmd.com/read/29124128/vascular-deformation-mapping-vdm-of-thoracic-aortic-enlargement-in-aneurysmal-disease-and-dissection
#15
Nicholas S Burris, Benjamin A Hoff, Ella A Kazerooni, Brian D Ross
Thoracic aortic aneurysm is a common and lethal disease that requires regular imaging surveillance to determine timing of surgical repair and prevent major complications such as rupture. Current cross-sectional imaging surveillance techniques, largely based on computed tomography angiography, are focused on measurement of maximal aortic diameter, although this approach is limited to fixed anatomic positions and is prone to significant measurement error. Here we present preliminary results showing the feasibility of a novel technique for assessing change in aortic dimensions, termed vascular deformation mapping (VDM)...
September 2017: Tomography: a Journal for Imaging Research
https://www.readbyqxmd.com/read/29110921/3d-printed-versus-conventionally-cured-provisional-crown-and-bridge-dental-materials
#16
Anthony Tahayeri, MaryCatherine Morgan, Ana P Fugolin, Despoina Bompolaki, Avathamsa Athirasala, Carmem S Pfeifer, Jack L Ferracane, Luiz E Bertassoni
OBJECTIVES: To optimize the 3D printing of a dental material for provisional crown and bridge restorations using a low-cost stereolithography 3D printer; and compare its mechanical properties against conventionally cured provisional dental materials. METHODS: Samples were 3D printed (25×2×2mm) using a commercial printable resin (NextDent C&B Vertex Dental) in a FormLabs1+ stereolithography 3D printer. The printing accuracy of printed bars was determined by comparing the width, length and thickness of samples for different printer settings (printing orientation and resin color) versus the set dimensions of CAD designs...
February 2018: Dental Materials: Official Publication of the Academy of Dental Materials
https://www.readbyqxmd.com/read/29068429/3-axis-fully-integrated-capacitive-tactile-sensor-with-flip-bonded-cmos-on-ltcc-interposer
#17
Sho Asano, Masanori Muroyama, Takahiro Nakayama, Yoshiyuki Hata, Yutaka Nonomura, Shuji Tanaka
This paper reports a 3-axis fully integrated differential capacitive tactile sensor surface-mountable on a bus line. The sensor integrates a flip-bonded complementary metal-oxide semiconductor (CMOS) with capacitive sensing circuits on a low temperature cofired ceramic (LTCC) interposer with Au through vias by Au-Au thermo-compression bonding. The CMOS circuit and bonding pads on the sensor backside were electrically connected through Au bumps and the LTCC interposer, and the differential capacitive gap was formed by an Au sealing frame...
October 25, 2017: Sensors
https://www.readbyqxmd.com/read/29020507/custom-repair-of-mandibular-bone-defects-with-3d-printed-bioceramic-scaffolds
#18
H Shao, M Sun, F Zhang, A Liu, Y He, J Fu, X Yang, H Wang, Z Gou
Implanting artificial biomaterial implants into alveolar bone defects with individual shape and appropriate mechanical strength is still a challenge. In this study, bioceramic scaffolds, which can precisely match the mandibular defects in macro and micro, were manufactured by the 3-dimensional (3D) printing technique according to the computed tomography (CT) image. To evaluate the stimulatory effect of the material substrate on bone tissue regeneration in situ in a rabbit mandibular alveolar bone defect model, implants made with the newly developed, mechanically strong ~10% Mg-substituted wollastonite (Ca90% Mg10% SiO3 ; CSi-Mg10) were fabricated, implanted into the bone defects, and compared with implants made with the typical Ca-phosphate and Ca-silicate porous bioceramics, such as β-tricalcium phosphate (TCP), wollastonite (CaSiO3 ; CSi), and bredigite (Bred)...
January 2018: Journal of Dental Research
https://www.readbyqxmd.com/read/28977423/three-dimensional-printed-models-for-surgical-planning-of-complex-congenital-heart-defects-an-international-multicentre-study
#19
Israel Valverde, Gorka Gomez-Ciriza, Tarique Hussain, Cristina Suarez-Mejias, Maria N Velasco-Forte, Nicholas Byrne, Antonio Ordoñez, Antonio Gonzalez-Calle, David Anderson, Mark G Hazekamp, Arno A W Roest, Jose Rivas-Gonzalez, Sergio Uribe, Issam El-Rassi, John Simpson, Owen Miller, Enrique Ruiz, Ignacio Zabala, Ana Mendez, Begoña Manso, Pastora Gallego, Freddy Prada, Massimiliano Cantinotti, Lamia Ait-Ali, Carlos Merino, Andrew Parry, Nancy Poirier, Gerald Greil, Reza Razavi, Tomas Gomez-Cia, Amir-Reza Hosseinpour
OBJECTIVES: To evaluate the impact of 3D printed models (3D models) on surgical planning in complex congenital heart disease (CHD). METHODS: A prospective case-crossover study involving 10 international centres and 40 patients with complex CHD (median age 3 years, range 1 month-34 years) was conducted. Magnetic resonance imaging and computed tomography were used to acquire and segment the 3D cardiovascular anatomy. Models were fabricated by fused deposition modelling of polyurethane filament, and dimensions were compared with medical images...
December 1, 2017: European Journal of Cardio-thoracic Surgery
https://www.readbyqxmd.com/read/28930824/evaluating-the-morphology-of-the-left-atrial-appendage-by-a-transesophageal-echocardiographic-3-dimensional-printed-model
#20
Hongning Song, Qing Zhou, Lan Zhang, Qing Deng, Yijia Wang, Bo Hu, Tuantuan Tan, Jinling Chen, Yiteng Pan, Fazhi He
The novel 3-dimensional printing (3DP) technique has shown its ability to assist personalized cardiac intervention therapy. This study aimed to determine the feasibility of 3D-printed left atrial appendage (LAA) models based on 3D transesophageal echocardiography (3D TEE) data and their application value in treating LAA occlusions.Eighteen patients with transcatheter LAA occlusion, and preprocedure 3D TEE and cardiac computed tomography were enrolled. 3D TEE volumetric data of the LAA were acquired and postprocessed for 3DP...
September 2017: Medicine (Baltimore)
keyword
keyword
32131
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"