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Laser additive manufacturing: Listening for defects as they happen

Researchers from EPFL have resolved a long-standing debate surrounding laser additive manufacturing processes with a pioneering approach to defect detection.

The progression of laser additive —which involves 3D printing of metallic objects using powders and lasers—has often been hindered by unexpected defects. Traditional monitoring methods, such as and machine learning algorithms, have shown significant limitations. They often either overlook defects or misinterpret them, making precision manufacturing elusive and barring the technique from essential industries like aeronautics and automotive manufacturing.

But what if it were possible to detect defects in real-time based on the differences in the sound the printer makes during a flawless print and one with irregularities? Up until now, the prospect of detecting these defects this way was deemed unreliable. However, researchers at the Laboratory of Thermomechanical Metallurgy (LMTM) at EPFL’s School of Engineering have successfully challenged this assumption.

Bio Ink Made out of Bacteria Could Be Used to 3D Print Organs

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Hello and welcome! My name is Anton I’m away for a few days due to voice issues, so enjoy this older video where we talk about the incredible invention of 3D printed bio ink that could be used to print any biological tissue (in theory). 3D printed heart anyone?

Links:
https://www.nature.com/articles/s41467-021-26791-x.
https://www.mdpi.com/2072-666X/12/8/865
https://www.sciencedaily.com/releases/2021/09/210921134345.htm.
https://en.wikipedia.org/wiki/Fibrin.

Bladder grown from 3D bioprinted tissue continues to function after 14 years


https://www.ascb.org/science-news/bioprinting-ethical-and-societal-implications/
Biocomputing: https://youtu.be/nszcPNhYRzI
Artificial cell: https://youtu.be/0MRGJNKACYs.
Synthethic genome: https://youtu.be/OxVZPKmm58M
0:00 History of 3D printing organs.
2:00 Why this is important for medical studies.
2:45 Bioink invention.
3:40 How this works.
5:30 Results from the study are quite incredible.
6:30 Future of medical 3D printing.

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Researchers engineer a material that can perform different tasks depending on temperature

Researchers report that they have developed a new composite material designed to change behaviors depending on temperature in order to perform specific tasks. These materials are poised to be part of the next generation of autonomous robotics that will interact with the environment.

The new study conducted by University of Illinois Urbana-Champaign civil and environmental engineering professor Shelly Zhang and graduate student Weichen Li, in collaboration with professor Tian Chen and graduate student Yue Wang from the University of Houston, uses , two distinct polymers, and 3D printing to reverse engineer a material that expands and contracts in response to change with or without .

The study findings are reported in the journal Science Advances.

Scientists 3D-Print Hair Follicles in Lab-Grown Skin

The technique represents an important step in engineering skin grafts, drug testing. A team led by scientists at Rensselaer Polytechnic Institute has 3D-printed hair follicles in human skin tissue cultured in the lab. This marks the first time researchers have used the technology to generate hair follicles, which play an important role in skin healing and function.

The finding, published in the journal Science Advances, has potential applications in regenerative medicine and drug testing, though engineering skin grafts that grow hair are still several years away.

“Our work is a proof-of-concept that hair follicle structures can be created in a highly precise, reproducible way using 3D-bioprinting. This kind of automated process is needed to make future biomanufacturing of skin possible,” said Pankaj Karande, Ph.D., an associate professor of chemical and biological engineering and a member of Rensselaer’s Shirley Ann Jackson, Ph.D. Center for Biotechnology and Interdisciplinary Studies, who led the study.

This 3D printer can watch itself fabricate objects

With 3D inkjet printing systems, engineers can fabricate hybrid structures that have soft and rigid components, like robotic grippers that are strong enough to grasp heavy objects but soft enough to interact safely with humans.

These multimaterial 3D printing systems utilize thousands of nozzles to deposit tiny droplets of resin, which are smoothed with a scraper or roller and cured with UV light. But the smoothing process could squish or smear resins that cure slowly, limiting the types of materials that can be used.

Researchers from MIT, the MIT spinout Inkbit, and ETH Zurich have developed a new 3D inkjet printing system that works with a much wider range of materials. Their printer utilizes computer vision to automatically scan the 3D printing surface and adjust the amount of resin each nozzle deposits in real time to ensure no areas have too much or too little material.

3D printed robots with bones, ligaments, and tendons

3D printing is advancing rapidly, and the range of materials that can be used has expanded considerably. While the technology was previously limited to fast-curing plastics, it has now been made suitable for slow-curing plastics as well. These have decisive advantages as they have enhanced elastic properties and are more durable and robust.

The use of such polymers is made possible by a new technology developed by researchers at ETH Zurich and a US start-up. As a result, researchers can now 3D print complex, more durable robots from a variety of high-quality materials in one go. This new technology also makes it easy to combine soft, elastic, and rigid materials. The researchers can also use it to create delicate structures and parts with cavities as desired.

New 3D printing technology enables more durable and flexible robots

This opens up new possibilities for creating complex robots with soft and rigid materials in one go.


Thomas Buchner / ETH Zurich.

3D printing is a revolutionary technology that can create objects of any shape and size from various materials. However, until now, it was mostly limited to using fast-curing plastics, which have some drawbacks. They are brittle, prone to cracking, and lose their shape easily when bent.

New 3D printing approach offers hope for brain injury repair

The University of Oxford researchers for the first time showcased that neural cells can be 3D printed to replicate the structure of the brain’s outer layer: the cerebral cortex.


In a significant breakthrough, scientists have created brain tissue using human stem cells through 3D printing. This advancement holds promise for potential future applications in treating brain injuries.

For the first time, the University of Oxford researchers showcased that neural cells can be 3D printed to replicate the structure of the brain’s outer layer: the cerebral cortex.

This accomplishment marks a significant advancement in the realm of neural tissue engineering.