| As we all know, so far only relatively hard materials can be printed in 3D. Certain organs in the body, such as soft tissues such as the brain and lungs, have extremely soft structures that are 3D printed on them to achieve It has been reported that researchers at Imperial College London, London, recently reported that software that uses a 3D printer to print brain-like structures has been implemented.  In the future, if such 3D printing can be put to practical use, allowing doctors to tailor organs for their patients' bodies will help alleviate the current serious shortage of human transplants. However, there are still some limitations to this technique. To make these organs using 3D printing technology, you first need to print the 3D organ scaffold to imitate the structure of the organ, and then wrap the printed structure with collagen Filling it with human cells In experiments, researchers used skin cells instead of brain cells to mimic the human brain. Zhengchu Tan, a researcher in the Department of Mechanical Engineering at Imperial College London, said: "The biological structure of 3D printing was mostly bones or hard organs like the liver and kidneys, and for now we use a very soft material that is A composite hydrogel that prints out soft tissue like the brain and the lungs. But, 3D printing is very soft material, prone to the underlying material collapse problem 'Researcher Zhengchu Tan added,' Actually, the process of 3D printing soft tissue involves the process of creating a layer-by-layer object layer, which means that the lower layer Need to be able to support the weight of the ever-growing structure. ' Researchers Zhengchu Tan explained that in order to solve this problem, the researchers cooled down the printing process: "During low temperature printing, the previous layer was frozen, which made the bottom layer very strong and stable, so that the new One layer can be printed on, and the printed material does not collapse due to the weight of the upper layer, and after the print is done, the researcher can slowly thaw the printed structure and retain its shape. |
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