Several technologies are developed recently to print objects with living cells inside them. This technology can lead to custom tissue replacements and other medical applications, but all of these methods are pretty slow. This is because living cells have to be carefully moved through the microcirculation channels to mix with other components, such as structural materials, then to an injector for printing. .

At the University of Twente, Netherlands, researchers have developed another novel way to quickly print 3D structures in which living cells are produced. They were able to precisely spray two liquid solutions together, one of which contains living cells, which quickly interact with each other and fix into a desired shape. The researchers correctly named their technique "trace liquid in air".

So far this method seems to be only possible on cylindrical objects, but it is certainly only a small proof of the feasibility of this method, along with the rapid control of nozzles. and other technical advances will allow for more diverse shapes. However, the accuracy of the object's shape is perhaps less important than being able to quickly introduce thousands of living cells without letting the first cell die before the last cell is introduced.

Translation summary: Dr. Nguyen Huu Tung et al

Source: //www.medgadget.com/2018/02/3d-printing-living-cells-useful-biomedical-objects.html