Health Ultra-fast 3D printing produces life-like organ models   Rapid method enhances cell survival, paves way toward printed organs NIBIB-funded engineers at the University of Buffalo have fine-tuned the use of stereolithography for 3D printing of organ models that contain live cells. The new technique is capable of printing the models 10-50 times faster than the industry standard—in minutes instead of hours— a major step in the quest to create 3D-printed replacement organs. Conventional 3D printing involves the meticulous addition of material to the 3D model with a small needle that produces fine detail but is extremely slow --taking six or seven hours to print a model of a human part, such as a hand, for instance. The lengthy process causes cellular stress and injury inhibiting the ability to seed the tissues with live, functioning cells.  The rapid printing process can print a small model of a human hand in minutes instead of hours. Credit: Rougang Zhao,