Figure 7.

Illustration of 3D bioprinting technologies based on the mechanism used to assist the deposition of the bioinks and its main components; (Left) Inkjet bioprinters eject small droplets of cells and hydrogel sequentially to build up the scaffold; (Middle) Laser bioprinters use a laser to generate the local ejection of small droplets from a donor ribbon coated with the bioink; (Right) Extrusion bioprinters uses pneumatic of mechanical forces to continuously extrude the bioink through a nozzle. Reproduced from [100] with permission. Copyright (2015) Wiley-VCH.