3D printing technology has enormous potential in healthcare due to its ability to be customized. Customization can dramatically reduce surgery times and medical expenses. Currently, the largest applications are 3D-printed scaffolds or prosthetics (orthopedic implants) and medical devices, such as dental implants and hearing aids. The game changer for 3D printing will be in human tissue printing: printed livers, hearts, ears, hands and eyes, or building the smallest functional units of tissues, which can lead to the fabrication of large tissues and organs. This can be used as surgical grafts to repair or replace the damaged tissues and organs.