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https://www.readbyqxmd.com/read/28502181/rapid-nano-gram-scale-screening-method-of-micro-arrays-to-evaluate-drug-polymer-blends-using-high-throughput-printing-technology
#1
Vincenzo Taresco, Iria Louzao, David Scurr, Jonathan Booth, Kevin Treacher, James McCabe, Eleanor Turpin, Charles A Laughton, Cameron Alexander, Jonathan C Burley, Martin C Garnett
A miniaturized, high-throughput assay was optimized to screen polymer-drug solid dispersions using a 2-D Ink-jet printer. By simply printing nanoliter amounts of polymer and drug solutions onto an inert surface, drug:polymer micro-dots of tunable composition were produced in an easily-addressable micro-array format. The amount of material printed for each dried spot ranged from 25 ng to 650 ng. These arrays were used to assess the stability of drug:polymer dispersions with respect to recrystallization, using polarized light microscopy...
May 14, 2017: Molecular Pharmaceutics
https://www.readbyqxmd.com/read/28501000/combination-of-a-biodegradable-three-dimensional-3d-printed-cage-for-mechanical-support-and-nanofibrous-membranes-for-sustainable-release-of-antimicrobial-agents-for-treating-the-femoral-metaphyseal-comminuted-fracture
#2
Ying-Chao Chou, Demei Lee, Tzu-Min Chang, Yung-Heng Hsu, Yi-Hsun Yu, Err-Cheng Chan, Shih-Jung Liu
The aim of this study was to develop a biodegradable three-dimensional-printed polylactide (PLA) cage for promoting bony fixation and an antibiotics-embedded poly(d,l)-lactide-co-glycolide (PLGA) nanofibrous membrane for infectious prophylaxis during treating the comminuted metaphyseal fracture in a rabbit femoral model. The in vitro studies included measuring the mechanical properties of the 3D printed cage and determining release activities of vancomycin and ceftazidime from the nanofibers. The in vivo study included comparisons of rabbits of the femoral metaphyseal comminuted fracture treated with or without the combined biodegradable polymers...
May 2, 2017: Journal of the Mechanical Behavior of Biomedical Materials
https://www.readbyqxmd.com/read/28500106/medical-3-d-printing
#3
Bryant Furlow
Three-dimensional printing is used in the manufacturing industry, medical and pharmaceutical research, drug production, clinical medicine, and dentistry, with implications for precision and personalized medicine. This technology is advancing the development of patient-specific prosthetics, stents, splints, and fixation devices and is changing medical education, treatment decision making, and surgical planning. Diagnostic imaging modalities play a fundamental role in the creation of 3-D printed models. Although most 3-D printed objects are rigid, flexible soft-tissue-like prosthetics also can be produced...
May 2017: Radiologic Technology
https://www.readbyqxmd.com/read/28490554/feasibility-cluster-randomised-controlled-trial-of-a-within-consultation-intervention-to-reduce-antibiotic-prescribing-for-children-presenting-to-primary-care-with-acute-respiratory-tract-infection-and-cough
#4
Peter S Blair, Sophie Turnbull, Jenny Ingram, Niamh Redmond, Patricia Jane Lucas, Christie Cabral, Sandra Hollinghurst, Padraig Dixon, Tim Peters, Jeremy Horwood, Paul Little, Nick A Francis, Anna Gilbertson, Catherine Jameson, Alastair D Hay
OBJECTIVE: To investigate recruitment and retention, data collection methods and the acceptability of a 'within-consultation' complex intervention designed to reduce antibiotic prescribing. DESIGN: Primary care feasibility cluster randomised controlled trial. SETTING: 32 general practices in South West England recruiting children from October 2014 to April 2015. PARTICIPANTS: Children (aged 3 months to <12 years) with acute cough and respiratory tract infection (RTI)...
May 9, 2017: BMJ Open
https://www.readbyqxmd.com/read/28488804/three-dimensional-shape-and-surface-features-distinguish-multiple-sclerosis-lesions-from-nonspecific-white-matter-disease
#5
Braeden D Newton, Katy Wright, Mandy D Winkler, Francesca Bovis, Masaya Takahashi, Ivan E Dimitrov, Maria Pia Sormani, Marco C Pinho, Darin T Okuda
BACKGROUND AND PURPOSE: There remains a need to further refine the ability of clinicians to differentiate multiple sclerosis (MS) from other disease etiologies. Here, we illustrate the value of 3-dimensional (3D) geometric shape and surface lesion characteristics between disease states. METHODS: Standardized 3-Tesla 3D brain magnetic resonance imaging studies were performed on enrolled MS and nonspecific white matter (NSWM) patients. Focal supratentorial lesions were identified, reconstructed using maximum intensity projection, manually segmented, and 3D printed...
May 10, 2017: Journal of Neuroimaging: Official Journal of the American Society of Neuroimaging
https://www.readbyqxmd.com/read/28488563/3-d-printing-open-source-click-muac-bands-for-identification-of-malnutrition
#6
Ross E Michaels, Joshua M Pearce
No abstract text is available yet for this article.
May 10, 2017: Public Health Nutrition
https://www.readbyqxmd.com/read/28480634/does-osteoporosis-influence-the-marginal-peri-implant-bone-level-in-female-patients-a-cross-sectional-study-in-a-matched-collective
#7
Florian Wagner, Krisztian Schuder, Markus Hof, Simone Heuberer, Rudolf Seemann, Gabriella Dvorak
BACKGROUND/PURPOSE: Osteoporosis, being a homeostatic imbalance, affects the remodeling of bone. Whether this catabolic bone disease influences peri-implant marginal bone remodeling remains unknown so far. The purpose of this study was to evaluate the influence of osteoporosis on peri-implant marginal bone loss (MBL) in postmenopausal women. MATERIALS AND METHODS: In a matched collective, radiographic peri-implant bone level (at baseline and at follow-up examinations) was compared in healthy and osteoporotic women...
May 8, 2017: Clinical Implant Dentistry and related Research
https://www.readbyqxmd.com/read/28478991/comparison-of-3d-displacements-of-screw-retained-zirconia-implant-crowns-into-implants-with-different-internal-connections-with-respect-to-screw-tightening
#8
Hanadi A Rebeeah, Burak Yilmaz, Jeremy D Seidt, Edwin McGlumphy, Nancy Clelland, William Brantley
STATEMENT OF PROBLEM: Internal conical implant-abutment connections without horizontal platforms may lead to crown displacement during screw tightening and torque application. This displacement may affect the proximal contacts and occlusion of the definitive prosthesis. PURPOSE: The purpose of this in vitro study was to evaluate the displacement of custom screw-retained zirconia single crowns into a recently introduced internal conical seal implant-abutment connection in 3D during hand and torque driver screw tightening...
May 5, 2017: Journal of Prosthetic Dentistry
https://www.readbyqxmd.com/read/28478944/theoretical-and-experimental-evaluation-of-the-effects-of-an-argon-gas-mixture-on-the-pressure-drop-through-adult-tracheobronchial-airway-replicas
#9
Patrick D Litwin, Anna Luisa Reis Dib, John Chen, Michelle Noga, Warren H Finlay, Andrew R Martin
Argon has the potential to be a novel inhaled therapeutic agent, owing to the neuroprotective and organoprotective properties demonstrated in preclinical studies. Before human trials are performed, an understanding of varying gas properties on airway resistance during inhalation is essential. This study predicts the effect of an 80% argon/20% oxygen gas mixture on the pressure drop through conducting airways, and by extension the airway resistance, and then verifies these predictions experimentally using 3-D printed adult tracheobronchial airway replicas...
April 18, 2017: Journal of Biomechanics
https://www.readbyqxmd.com/read/28474286/the-impact-of-3-d-models-versus-animations-on-perceptions-of-osteoporosis-and-treatment-motivation-a-randomised-trial
#10
Annie S K Jones, Justin Fernandez, Andrew Grey, Keith J Petrie
BACKGROUND: Osteoporosis is a degenerative bone disorder that disproportionately affects older women worldwide. Raising awareness regarding osteoporosis within this demographic is significant for health promotion. Initial evidence suggests that visualisations of illness and treatment can improve illness perceptions, increase treatment motivations and even promote health behaviours. We are yet to understand whether different visualisation mediums vary in their impact on perceptions and motivations...
May 4, 2017: Annals of Behavioral Medicine: a Publication of the Society of Behavioral Medicine
https://www.readbyqxmd.com/read/28465185/3-d-printing-provides-a-novel-approach-for-standardization-and-reproducibility-of-freezing-devices
#11
E Hu, William Childress, Terrence R Tiersch
Cryopreservation has become an important and accepted tool for long-term germplasm conservation of animals and plants. To protect genetic resources, repositories have been developed with national and international cooperation. For a repository to be effective, the genetic material submitted must be of good quality and comparable to other submissions. However, due to a variety of reasons, including constraints in knowledge and available resources, cryopreservation methods for aquatic species vary widely across user groups which reduces reproducibility and weakens quality control...
April 29, 2017: Cryobiology
https://www.readbyqxmd.com/read/28453949/replacing-heavily-damaged-teeth-by-third-molar-autotransplantation-with-the-use-of-cone-beam-computed-tomography-and-rapid-prototyping
#12
J P Verweij, D Anssari Moin, D Wismeijer, J P R van Merkesteyn
This article describes the autotransplantation of third molars to replace heavily damaged premolars and molars. Specifically, this article reports on the use of preoperative cone-beam computed tomographic planning and 3-dimensional (3D) printed replicas of donor teeth to prepare artificial tooth sockets. In the present case, an 18-year-old patient underwent autotransplantation of 3 third molars to replace 1 premolar and 2 molars that were heavily damaged after trauma. Approximately 1 year after the traumatic incident, autotransplantation with the help of 3D planning and rapid prototyping was performed...
April 4, 2017: Journal of Oral and Maxillofacial Surgery
https://www.readbyqxmd.com/read/28449548/vibration-induced-property-change-in-the-melting-and-solidifying-process-of-metallic-nanoparticles
#13
Yonggang Zheng, Liquan Ding, Hongfei Ye, Zhen Chen
Tuning material properties in the 3-D printing process of metallic parts is a challenging task of current interests. Much research has been conducted to understand the effects of controlling parameters such as the particle geometry (size and shape), heating, and cooling ways on the outcome of the printing process. However, nothing has been done to explore the system vibration effect. This letter reports our findings on the vibration-induced property change in the melting and solidifying process of silver nanoparticles with the use of molecular dynamics simulation...
December 2017: Nanoscale Research Letters
https://www.readbyqxmd.com/read/28445902/a-3d-printed-cap-with-sideoptics-for-colonoscopy-a-randomized-ex-vivo-study
#14
Benjamin M Walter, Alexander Hann, Rena Frank, Alexander Meining
Background Adequate polyp detection is crucial to colonoscopy; however, detection can be impaired. In particular, flat polyps located behind folds or near the colonic flexures appear to be a problem. We present a cheap and easily adjustable 3D-printed tool to enhance the view of a standard colonoscope using additional commercially available sideoptics. Materials and methods A cap adjustable to a standard endoscope was printed by a 3 D printer and had two microcameras fixed to offer two additional views...
April 26, 2017: Endoscopy
https://www.readbyqxmd.com/read/28444404/velmahos-gc-degiannis-e-doll-d-eds-penetrating-trauma-a-practical-guide-on-operative-technique-and-peri-operative-management-springer-verlag-berlin-heidelberg-2017-isbn-978-3-662-49857-6-print-978-3-662-49859-0-online
#15
F J Turégano
No abstract text is available yet for this article.
April 25, 2017: European Journal of Trauma and Emergency Surgery: Official Publication of the European Trauma Society
https://www.readbyqxmd.com/read/28441229/preliminary-model-for-the-design-of-a-custom-middle-ear-prosthesis
#16
Brandon Kamrava, Jonathan A Gerstenhaber, Mamta Amin, Yah-El Har-El, Pamela C Roehm
HYPOTHESIS: Custom prostheses could be used to recreate the ossicular chain and improve hearing. BACKGROUND: Ossicular discontinuity or fixation occurs in 55% of cases of conductive hearing loss, with most cases involving the incus. Reconstruction has been achieved by a variety of methods; however, there has been little improvement in hearing outcomes in decades. METHODS: Precise measurements of anatomic dimensions, weight, and center of gravity were taken from 19 cadaveric incudes...
April 24, 2017: Otology & Neurotology
https://www.readbyqxmd.com/read/28440728/characterization-of-chemical-contaminants-generated-by-a-desktop-fused-deposition-modeling-3-dimensional-printer
#17
Aleksandr B Stefaniak, Ryan F LeBouf, Jinghai Yi, Jason Ham, Timothy Nurkewicz, Diane E Schwegler-Berry, Bean T Chen, J Raymond Wells, Matthew G Duling, Robert B Lawrence, Stephen B Martin, Alyson R Johnson, M Abbas Virji
Printing devices are known to emit chemicals into the indoor atmosphere. Understanding factors that influence release of chemical contaminants from printers is necessary to develop effective exposure assessment and control strategies. In this study, a desktop fused deposition modeling (FDM) 3-D printer using acrylonitrile butadiene styrene (ABS) or polylactic acid (PLA) filaments and two monochrome laser printers were evaluated in a 0.5 m(3) chamber. During printing, chamber air was monitored for vapors using a real-time photoionization detector (results expressed as isobutylene equivalents) to measure total volatile organic compound (TVOC) concentrations, evacuated canisters to identify specific VOCs by off-line gas chromatography-mass spectrometry (GC-MS) analysis, and liquid bubblers to identify carbonyl compounds by GC-MS...
April 25, 2017: Journal of Occupational and Environmental Hygiene
https://www.readbyqxmd.com/read/28434658/feasibility-of-ultrasound-based-computational-fluid-dynamics-as-a-mitral-valve-regurgitation-quantification-technique-comparison-with-2-d-and-3-d-proximal-isovelocity-surface-area-based-methods
#18
Muhammad Jamil, Omar Ahmad, Kian Keong Poh, Choon Hwai Yap
Current Doppler echocardiography quantification of mitral regurgitation (MR) severity has shortcomings. Proximal isovelocity surface area (PISA)-based methods, for example, are unable to account for the fact that ultrasound Doppler can measure only one velocity component: toward or away from the transducer. In the present study, we used ultrasound-based computational fluid dynamics (Ub-CFD) to quantify mitral regurgitation and study its advantages and disadvantages compared with 2-D and 3-D PISA methods. For Ub-CFD, patient-specific mitral valve geometry and velocity data were obtained from clinical ultrasound followed by 3-D CFD simulations at an assumed flow rate...
April 20, 2017: Ultrasound in Medicine & Biology
https://www.readbyqxmd.com/read/28430115/a-systematic-review-of-3-d-printing-in-cardiovascular-and-cerebrovascular-diseases
#19
Zhonghua Sun, Shen Yuan Lee
OBJECTIVE: The application of 3-D printing has been increasingly used in medicine, with research showing many applications in cardiovascular disease. This systematic review analyzes those studies published about the applications of 3-D printed, patient-specific models in cardiovascular and cerebrovascular diseases. METHODS: A search of PubMed/Medline and Scopus databases was performed to identify studies investigating the 3-D printing in cardiovascular and cerebrovascular diseases...
April 10, 2017: Anatolian Journal of Cardiology
https://www.readbyqxmd.com/read/28426301/small-group-randomized-controlled-trial-to-increase-condom-use-and-hiv-testing-among-hispanic-latino-gay-bisexual-and-other-men-who-have-sex-with-men
#20
Scott D Rhodes, Jorge Alonzo, Lilli Mann, Eunyoung Y Song, Amanda E Tanner, Jorge Elias Arellano, Rodrigo Rodriguez-Celedon, Manuel Garcia, Arin Freeman, Beth A Reboussin, Thomas M Painter
OBJECTIVES: To evaluate the HOLA en Grupos intervention, a Spanish-language small-group behavioral HIV prevention intervention designed to increase condom use and HIV testing among Hispanic/Latino gay, bisexual, and other men who have sex with men. METHODS: In 2012 to 2015, we recruited and randomized 304 Hispanic/Latino men who have sex with men, aged 18 to 55 years in North Carolina, to the 4-session HOLA en Grupos intervention or an attention-equivalent general health education comparison intervention...
June 2017: American Journal of Public Health
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