3D bio printing is used for the production of artificial organs. A Computer Aided Design (CAD) is used to visualize the specifications and patterns of the three-dimensional organ. In this way various organs systems can be engineered as three-dimensional (3-D) structures. The 3D bio printing technique allows to combine various cells and biomaterials freely in 3D space and to study them in a systematic and reproducible way. Read the new article on 3D-Bioprinting publised by Jutta Wirth in the current issue of Deutscher Ärzteverlag MTA Dialog 2016 17 (12) 689-692. DOI:10.3238/MTADIALOG.2016.0689.