9 results match your criteria 3d Printing And Additive Manufacturing[Journal]

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Osseointegration of Coarse and Fine Textured Implants Manufactured by Electron Beam Melting and Direct Metal Laser Sintering.

3D Print Addit Manuf 2017 Jun;4(2):91-97

Department of Biomedical Engineering, University of North Carolina-NC State University, Chapel Hill-Raleigh, North Carolina.

Osseointegrated implants transfer loads from native bone to a synthetic joint and can also function transdermally to provide a stable connection between the skeleton and the prostheses, eliminating many problems associated with socket prostheses. Additive manufacturing provides a cost-effective means to create patient-specific implants and allows for customized textures for integration with bone and other tissues. Our objective was to compare the osseointegration strength of two primary additive manufacturing methods of producing textured implants: electron beam melting (EBM) (mean Ra = 23 μm) and direct metal laser sintering (DMLS) (mean Ra = 10 μm). Read More

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http://dx.doi.org/10.1089/3dp.2017.0008DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6114714PMC
June 2017
1 Read

3D Systems' Technology Overview and New Applications in Manufacturing, Engineering, Science, and Education.

3D Print Addit Manuf 2014 Sep;1(3):169-176

NASA Johnson Space Center, Houston, Texas.

Since the inception of 3D printing, an evolutionary process has taken place in which specific user and customer needs have crossed paths with the capabilities of a growing number of machines to create value-added businesses. Even today, over 30 years later, the growth of 3D printing and its utilization for the good of society is often limited by the various users' understanding of the technology for their specific needs. This article presents an overview of current 3D printing technologies and shows numerous examples from a multitude of fields from manufacturing to education. Read More

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http://dx.doi.org/10.1089/3dp.2014.1502DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC5363289PMC
September 2014
1 Read

Rapid Prototyping of Inspired Gas Delivery System for Pulmonary MRI Research.

3D Print Addit Manuf 2015 Dec;2(4):196-203

Department of Medicine, University of California, San Diego, La Jolla, California.; Department of Radiology, University of California, San Diego, La Jolla, California.

Specific ventilation imaging (SVI) is a noninvasive magnetic resonance imaging (MRI)-based method for determining the regional distribution of inspired air in the lungs, useful for the assessment of pulmonary function in medical research. This technique works by monitoring the rate of magnetic resonance signal change in response to a series of imposed step changes in inspired oxygen concentration. The current SVI technique requires a complex system of tubes, valves, and electronics that are used to supply and rapidly switch inspired gases while subjects are imaged, which makes the technique difficult to translate into the clinical setting. Read More

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http://www.liebertpub.com/doi/10.1089/3dp.2015.0027
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http://dx.doi.org/10.1089/3dp.2015.0027DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC4981153PMC
December 2015
1 Read

Conformal Robotic Stereolithography.

3D Print Addit Manuf 2016 Dec;3(4):226-235

Department of Mechanical Engineering and Laboratory for Manufacturing and Productivity, Massachusetts Institute of Technology, Cambridge, Massachusetts.

Additive manufacturing by layerwise photopolymerization, commonly called stereolithography (SLA), is attractive due to its high resolution and diversity of materials chemistry. However, traditional SLA methods are restricted to planar substrates and planar layers that are perpendicular to a single-axis build direction. Here, we present a robotic system that is capable of maskless layerwise photopolymerization on curved surfaces, enabling production of large-area conformal patterns and the construction of conformal freeform objects. Read More

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http://dx.doi.org/10.1089/3dp.2016.0042DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC5363219PMC
December 2016
1 Read

Spatial Control of Bacteria Using Screen Printing.

3D Print Addit Manuf 2016 Dec;3(4):194-203

Department of Biomedical Engineering, Columbia University, New York, New York.

Synthetic biology has led to advances in both our understanding and engineering of genetic circuits that affect spatial and temporal behaviors in living cells. A growing array of native and synthetic circuits such as oscillators, pattern generators, and cell-cell communication systems has been studied, which exhibit spatiotemporal properties. To better understand the design principles of these genetic circuits, there is a need for versatile and precise methods for patterning cell populations in various configurations. Read More

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http://dx.doi.org/10.1089/3dp.2016.0040DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC5363221PMC
December 2016
3 Reads

Enhanced Osteoblast Response to Porosity and Resolution of Additively Manufactured Ti-6Al-4V Constructs with Trabeculae-Inspired Porosity.

3D Print Addit Manuf 2016 Mar;3(1):10-21

Department of Biomedical Engineering, Virginia Commonwealth University, Richmond, Virginia.

The addition of porosity to the traditionally used solid titanium metal implants has been suggested to more closely mimic the natural mechanical properties of bone and increase osseointegration in dental and orthopedic implants. The objective of this study was to evaluate cellular response to three-dimensional (3D) porous Ti-6Al-4V constructs fabricated by additive manufacturing using laser sintering with low porosity (LP), medium porosity (MP), and high porosity (HP) with low resolution (LR) and high resolution (HR) based on a computed tomography scan of human trabecular bone. After surface processing, construct porosity ranged from 41. Read More

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http://www.liebertpub.com/doi/10.1089/3dp.2015.0038
Publisher Site
http://dx.doi.org/10.1089/3dp.2015.0038DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC4981154PMC
March 2016
3 Reads

3D Printing of Personalized Artificial Bone Scaffolds.

3D Print Addit Manuf 2015 Jun;2(2):56-64

Division of Musculoskeletal Sciences, Department of Orthopaedics and Rehabilitation, Penn State College of Medicine, Hershey, Pennsylvania.

Additive manufacturing technologies, including three-dimensional printing (3DP), have unlocked new possibilities for bone tissue engineering. Long-term regeneration of normal anatomic structure, shape, and function is clinically important subsequent to bone trauma, tumor, infection, nonunion after fracture, or congenital abnormality. Due to the great complexity in structure and properties of bone across the population, along with variation in the type of injury or defect, currently available treatments for larger bone defects that support load often fail in replicating the anatomic shape and structure of the lost bone tissue. Read More

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http://dx.doi.org/10.1089/3dp.2015.0001DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC4981149PMC
June 2015
5 Reads

The NIH 3D Print Exchange: A Public Resource for Bioscientific and Biomedical 3D Prints.

3D Print Addit Manuf 2014 Sep;1(3):137-140

Bioinformatics and Computational Biosciences Branch, Office of Cyber Infrastructure and Computational Biology, National Institute of Allergy and Infectious Diseases, National Institutes of Health , Bethesda, Maryland.

The National Institutes of Health (NIH) has launched the NIH 3D Print Exchange, an online portal for discovering and creating bioscientifically relevant 3D models suitable for 3D printing, to provide both researchers and educators with a trusted source to discover accurate and informative models. There are a number of online resources for 3D prints, but there is a paucity of scientific models, and the expertise required to generate and validate such models remains a barrier. The NIH 3D Print Exchange fills this gap by providing novel, web-based tools that empower users with the ability to create ready-to-print 3D files from molecular structure data, microscopy image stacks, and computed tomography scan data. Read More

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http://dx.doi.org/10.1089/3dp.2014.1503DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC4981148PMC
September 2014
6 Reads

3D-Printed Tissue-Mimicking Phantoms for Medical Imaging and Computational Validation Applications.

3D Print Addit Manuf 2014 Mar;1(1):14-23

Centre for Applied Biomedical Engineering Research, Department of Mechanical, Aeronautical and Biomedical Engineering, University of Limerick, Limerick, Ireland.

in vivo Read More

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http://dx.doi.org/10.1089/3dp.2013.0010DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC4981152PMC
March 2014
7 Reads
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