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https://www.readbyqxmd.com/read/29034225/the-perception-of-a-three-dimensional-printed-heart-model-from-the-perspective-of-different-stakeholders-a-complex-case-of-truncus-arteriosus
#1
Giovanni Biglino, Sarah Moharem-Elgamal, Matthew Lee, Robert Tulloh, Massimo Caputo
The case of an 11-year-old male patient with truncus arteriosus is presented. The patient has a right aortic arch, a repaired truncus arteriosus, pulmonary artery stenosis, as well as conduit stenosis, with a complex surgical plan being discussed. In order to gather additional insight into the patient's anatomy prior to the surgery and to facilitate communication with the patient's parents, a three-dimensional (3D) model of his heart and main vessels was created from computed tomography data. Feedback was collected from different stakeholders...
2017: Frontiers in Pediatrics
https://www.readbyqxmd.com/read/29034057/design-and-fabrication-of-a-low-cost-three-dimensional-bioprinter
#2
Colton McElheny, Daniel Hayes, Ram Devireddy
Three-dimensional (3D) bioprinting offers innovative research vectors for tissue engineering. However, commercially available bioprinting platforms can be cost prohibitive to small research facilities, especially in an academic setting. The goal is to design and fabricate a low-cost printing platform able to deliver cell-laden fluids with spatial accuracy along the X, Y, and Z axes of 0.1 mm. The bioprinter consists of three subassemblies: a base unit, a gantry, and a shuttle component. The platform utilizes four stepper motors to position along three axes and a fifth stepper motor actuating a pump...
December 2017: Journal of Medical Devices
https://www.readbyqxmd.com/read/29032176/three-dimensional-evaluation-of-marginal-and-internal-fit-of-3d-printed-interim-restorations-fabricated-on-different-finish-line-designs
#3
Nawal Alharbi, Saud Alharbi, Vincent M J I Cuijpers, Reham B Osman, Daniel Wismeijer
PurposeTo evaluate the influence of fabrication method and finish line design on marginal and internal fit of full-coverage interim restorations. MethodsFour typodont models of maxillary central-incisor were prepared for full-coverage restorations. Four groups were defined; knife-edge (KE), chamfer (C), rounded-shoulder (RS), rounded-shoulder with bevel (RSB). All preparations were digitally scanned. A total of 80 restorations were fabricated; 20 per group (SLA/3D-printed n=10, milled n=10). All restorations were positioned on the master die and scanned using micro-computed tomography...
October 11, 2017: Journal of Prosthodontic Research
https://www.readbyqxmd.com/read/29030285/clinical-applications-of-3d-printing-primer-for-radiologists
#4
REVIEW
David H Ballard, Anthony Paul Trace, Sayed Ali, Taryn Hodgdon, Matthew E Zygmont, Carolynn M DeBenedectis, Stacy E Smith, Michael L Richardson, Midhir J Patel, Summer J Decker, Leon Lenchik
Three-dimensional (3D) printing refers to a number of manufacturing technologies that create physical models from digital information. Radiology is poised to advance the application of 3D printing in health care because our specialty has an established history of acquiring and managing the digital information needed to create such models. The 3D Printing Task Force of the Radiology Research Alliance presents a review of the clinical applications of this burgeoning technology, with a focus on the opportunities for radiology...
October 10, 2017: Academic Radiology
https://www.readbyqxmd.com/read/29030283/logistics-of-three-dimensional-printing-primer-for-radiologists
#5
REVIEW
Taryn Hodgdon, Raman Danrad, Midhir J Patel, Stacy E Smith, Michael L Richardson, David H Ballard, Sayed Ali, Anthony Paul Trace, Carolynn M DeBenedectis, Matthew E Zygmont, Leon Lenchik, Summer J Decker
The Association of University Radiologists Radiology Research Alliance Task Force on three-dimensional (3D) printing presents a review of the logistic considerations for establishing a clinical service using this new technology, specifically focused on implications for radiology. Specific topics include printer selection for 3D printing, software selection, creating a 3D model for printing, providing a 3D printing service, research directions, and opportunities for radiologists to be involved in 3D printing...
October 10, 2017: Academic Radiology
https://www.readbyqxmd.com/read/29030276/dental-occlusal-surface-supported-titanium-guide-to-assist-cutting-and-drilling-in-mandibular-bilateral-sagittal-split-osteotomy
#6
Charles Savoldelli, Clair Vandersteen, Olivier Dassonville, Joseph Santini
INTRODUCTION: Cutting and drilling guides manufactured using computer-aided design/computer-aided manufacturing (CAD/CAM) technologies have attracted increasing interest in orthognathic surgery, particularly in complex cases. The development of these guides requires virtual surgery planning and three-dimensional modelling before they can be printed in titanium, polyamide, or resin. We report the use of a personalized titanium device to assist bilateral sagittal split osteotomy (BSSO) with or without genioplasty combined with individual implants for repositioning and fixation...
October 10, 2017: Journal of Stomatology, Oral and Maxillofacial Surgery
https://www.readbyqxmd.com/read/29027906/directed-assembly-based-printing-of-homogeneous-and-hybrid-nanorods-using-dielectrophoresis
#7
Zhimin Chai, Cihan Yilmaz, Ahmed Busnaina, Charles A Lissandrello, David J D Carter
Printing nano and microscale three-dimensional (3D) structures using directed assembly of nanoparticles has many potential applications in electronics, photonics and biotechnology. This paper presents a reproducible and scalable 3D dielectrophoresis assembly process for printing homogeneous silica and hybrid silica/gold nanorods from silica and gold nanoparticles. The nanoparticles are assembled into patterned vias under a dielectrophoretic force generated by an alternating current (AC) field, and then completely fused in situ to form nanorods...
October 13, 2017: Nanotechnology
https://www.readbyqxmd.com/read/29017792/three-dimensional-printing-of-navigational-template-in-localization-of-pulmonary-nodule-a-pilot-study
#8
Lei Zhang, Mu Li, Zeyao Li, Xiermaimaiti Kedeer, Long Wang, Ziwen Fan, Chang Chen
BACKGROUND: Small pulmonary nodules are a common problem, especially with the wide implementation of lung cancer-screening program. This poses a great challenge to thoracic surgeons because of the difficulty of nodule localization. We recently built an efficient, customized navigational template using 3-dimensional (3D) printing technology to facilitate the procedure of lung nodule localization. This study aims to investigate its feasibility in clinical application. METHODS: Patients with peripheral lung nodules (<2 cm) were enrolled...
September 1, 2017: Journal of Thoracic and Cardiovascular Surgery
https://www.readbyqxmd.com/read/29016991/case-report-of-asthma-associated-with-3d-printing
#9
R House, N Rajaram, S M Tarlo
Background: Three-dimensional (3D) printing is being increasingly used in manufacturing and by small business entrepreneurs and home hobbyists. Exposure to airborne emissions during 3D printing raises the issue of whether there may be adverse health effects associated with these emissions. Aims: We present a case of a worker who developed asthma while using 3D printers, which illustrates that respiratory problems may be associated with 3D printer emissions. Case report: The patient was a 28-year-old self-employed businessman with a past history of asthma in childhood, which had resolved completely by the age of eight...
August 23, 2017: Occupational Medicine
https://www.readbyqxmd.com/read/28993169/anti-tuberculosis-drug-combination-for-controlled-oral-delivery-using-3d-printed-compartmental-dosage-forms-from-drug-product-design-to-in-vivo-testing
#10
Natalja Genina, Johan Peter Boetker, Stefano Colombo, Necati Harmankaya, Jukka Rantanen, Adam Bohr
The design and production of an oral dual-compartmental dosage unit (dcDU) was examined in vitro and in vivo with the purpose of physically isolating and modulating the release profile of an anti-tuberculosis drug combination. Rifampicin (RIF) and isoniazid (ISO) are first line combination drugs for treatment of tuberculosis (TB) that negatively interact with each other upon simultaneous release in acidic environment. The dcDUs were designed in silico by computer aided design (CAD) and fabricated in two steps; first three-dimensional (3D) printing of the outer structure, followed by hot-melt extrusion (HME) of the drug-containing filaments...
October 6, 2017: Journal of Controlled Release: Official Journal of the Controlled Release Society
https://www.readbyqxmd.com/read/28991268/programmable-assembly-of-pressure-sensors-using-pattern-forming-bacteria
#11
Yangxiaolu Cao, Yaying Feng, Marc D Ryser, Kui Zhu, Gregory Herschlag, Changyong Cao, Katherine Marusak, Stefan Zauscher, Lingchong You
Biological systems can generate microstructured materials that combine organic and inorganic components and possess diverse physical and chemical properties. However, these natural processes in materials fabrication are not readily programmable. Here, we use a synthetic-biology approach to assemble patterned materials. We demonstrate programmable fabrication of three-dimensional (3D) materials by printing engineered self-patterning bacteria on permeable membranes that serve as a structural scaffold. Application of gold nanoparticles to the colonies creates hybrid organic-inorganic dome structures...
October 9, 2017: Nature Biotechnology
https://www.readbyqxmd.com/read/28990579/bone-matrix-production-in-hydroxyapatite-modified-hydrogels-suitable-for-bone-bioprinting
#12
Annika Wenz, Kirsten Borchers, Günter E M Tovar, Petra Kluger
Though bioprinting is a forward-looking approach in bone tissue engineering, the development of bioinks which are on the one hand processable with the chosen printing technique, and on the other hand possess the relevant mechanical as well as osteoconductive features remains a challenge. In the present study, polymer solutions based on methacrylated gelatin and methacrylated hyaluronic acid modified with hydroxyapatite particles (5 wt%) were prepared. Encapsulation of primary human adipose-derived stem cells in the hydroxyapatite-containing gels and culture for 28 days resulted in a storage moduli significantly increased to126...
October 9, 2017: Biofabrication
https://www.readbyqxmd.com/read/28987743/is-three-dimensional-printing-the-right-fit-for-your-reconstruction
#13
EDITORIAL
Ikenna C Okereke
No abstract text is available yet for this article.
September 15, 2017: Journal of Thoracic and Cardiovascular Surgery
https://www.readbyqxmd.com/read/28985202/3d-bioprinting-using-stem-cells
#14
REVIEW
Chin Siang Ong, Pooja Yesantharao, Chen Yu Huang, Gunnar Mattson, Joseph Boktor, Takuma Fukunishi, Huaitao Zhang, Narutoshi Hibino
Recent advances have allowed for three-dimensional (3D) printing technologies to be applied to biocompatible materials, cells and supporting components, creating a field of 3D bioprinting that holds great promise for artificial organ printing and regenerative medicine. At the same time, stem cells, such as human induced pluripotent stem cells, have driven a paradigm shift in tissue regeneration and the modeling of human disease, and represent an unlimited cell source for tissue regeneration and the study of human disease...
October 6, 2017: Pediatric Research
https://www.readbyqxmd.com/read/28981287/nanoengineered-colloidal-inks-for-3d-bioprinting
#15
Charles W Peak, Jean Stein, Karli A Gold, Akhilesh K Gaharwar
Nanoengineered hydrogels offer the potential to design shear-thinning bioinks for three-dimensional (3D) bioprinting. Here, we have synthesized colloidal bioinks composed of disk-shaped two-dimensional (2D) nanosilicates (Laponite) and poly(ethylene glycol) (PEG). The addition of Laponite reinforces the PEG network and increases viscosity, storage modulus and network stability. PEG-Laponite hydrogels display shear-thinning and self-recovery characteristics due to rapid internal phase rearrangement. As a result, a range of complex pattern can be printed using PEG-Laponite bioinks...
October 5, 2017: Langmuir: the ACS Journal of Surfaces and Colloids
https://www.readbyqxmd.com/read/28978460/three-dimensional-printed-patient-specific-cutting-guides-for-femoral-varization-osteotomy-do-it-yourself
#16
Juan Arnal-Burró, Rubén Pérez-Mañanes, Eudaldo Gallo-Del-Valle, Cristina Igualada-Blazquez, Manuel Cuervas-Mons, Javier Vaquero-Martín
INTRODUCTION: In valgus knees of young patients, opening-wedge distal femoral osteotomy is a valid treatment option for axial corrections. It allows the surgeon to achieve accurate correction, which is directly related to the functional outcome and survivorship of the osteotomy. This study presents a new technique based on three-dimensional (3D)-printed cutting guides for opening-wedge distal femoral osteotomies, in which pre-operative planning and intraoperative executional accuracy play a major role...
October 1, 2017: Knee
https://www.readbyqxmd.com/read/28977423/three-dimensional-printed-models-for-surgical-planning-of-complex-congenital-heart-defects-an-international-multicentre-study
#17
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...
July 12, 2017: European Journal of Cardio-thoracic Surgery
https://www.readbyqxmd.com/read/28976356/creating-hierarchical-porosity-hydroxyapatite-scaffold-with-osteoinduction-by-three-dimensional-printing-and-microwave-sintering
#18
Xuan Pei, Liang Ma, Boqing Zhang, Jianxun Sun, Yong Sun, Yujiang Fan, Zhongru Gou, Changchun Zhou, Xingdong Zhang
Hierarchical porosity, which includes micropores and macropores in scaffolds, contributes to important multiple biological functions for tissue regeneration. This paper introduced a two-step method of combining three-dimensional printing (3DP) and microwave sintering to fabricate two-level hierarchical porous scaffolds. The results showed that 3D printing made the macroporous structure well-controlled and microwave sintering generated micropores on macropore surface. The resulting hierarchical macro-/micro-porous hydroxyapatite scaffold induced bone formation following intramuscular implantation...
October 4, 2017: Biofabrication
https://www.readbyqxmd.com/read/28969918/marginal-and-internal-fit-of-pressed-lithium-disilicate-inlays-fabricated-with-milling-3d-printing-and-conventional-technologies
#19
Foudda R Homsy, Mutlu Özcan, Marwan Khoury, Zeina A K Majzoub
STATEMENT OF PROBLEM: The subtractive and additive computer-aided design and computer-aided manufacturing (CAD-CAM) of lithium disilicate partial coverage restorations is poorly documented. PURPOSE: The purpose of this in vitro study was to compare the marginal and internal fit accuracy of lithium disilicate glass-ceramic inlays fabricated with conventional, milled, and 3-dimensional (3D) printed wax patterns. MATERIAL AND METHODS: A dentoform mandibular first molar was prepared for a mesio-occlusal ceramic inlay...
September 29, 2017: Journal of Prosthetic Dentistry
https://www.readbyqxmd.com/read/28968315/three-dimensional-printing-a-novel-approach-to-the-creation-of-obturator-prostheses-following-palatal-resection-for-malignant-palate-tumors
#20
Michael Bartellas, Jamie Tibbo, Doug Angel, Arthur Rideout, Joshua Gillis
BACKGROUND: A subgroup of patients who have an oronasal fistula live in areas that have limited access to oral prosthetics. For these individuals, a temporary prosthesis, such as a palatal obturator, may be necessary in order to speak, eat, and breath properly. The creation of an obturator, which requires a highly trained prosthodontist, can take time and can be expensive. Through the current proof-of-concept study, there is an attempt to create a patient-specific palatal obturator through use of free and publicly available software, and a low-cost desktop 3-dimensional printer...
September 29, 2017: Journal of Craniofacial Surgery
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