3D printers are really going to change the world, with the technology being used more and more in the healthcare industry. 3D printed human tissue, prosthetics and much more are being printed, but now 3D printers have saved a young boy’s life. 14-month-old Roland Lian Cung Bawi, son of two Burmese immigrants living in Owensboro, Kentucky, had major defects to his heart.