Research background of 3D printing: 3D printing technology appeared in the mid-1990s. In fact, it is the latest rapid prototyping equipment using light curing and paper laminating technology. Its working principle is basically the same as that of ordinary printers. The printer is full of printing materials, such as liquid or powder. After connecting with the computer, the printed materials are superimposed layer by layer under the control of the computer, and finally the blueprint on the computer becomes a physical object. This printing technology is called 3D stereoscopic printing technology.

20 19 65438+ 10/4, University of California, San Diego published a paper in the journal Nature and Medicine. For the first time, a spinal cord scaffold imitating the structure of the central nervous system was made by using fast 3D printing technology. After loading neural stem cells, they were implanted into the spinal column of rats with severe spinal cord injury, which successfully helped the rats recover their motor function.

The stent imitates the structural design of the central nervous system, is round and has a thickness of only two millimeters. The middle of the scaffold is H-shaped, and there are dozens of tiny channels with a diameter of about 200 microns around it, which are used to guide the implanted neural stem cells and axons to grow along the spinal cord injury site.

Research Significance of 3D Printing

In recent years, 3D printing technology has been widely used in automobile design, aerospace and medical industry. However, the research and application of 3D printing technology in the automatic construction of large building structures is still in its infancy. The research and development of 3D printing building materials has become the core technology to realize 3D printing building.

At present, scholars at home and abroad have tried to develop 3D printed building materials, such as: Dutch experts have used resin and plastic materials for research and development; Americans use resin mortar, clay and concrete materials for testing 3D printing materials. Loughborough University in the United Kingdom has studied the properties of concrete materials needed for printing.

Refer to the above content: Baidu Encyclopedia -3D Printing