How 4D printing is now saving lives

ORLANDO -- Sixteen-month-old Garrett Peterson's airways collapsed daily.Peterson was born with bronchomalacia, weak cartilage in the walls of the bronchial tubes, and had spent his entire life at the University of Utah Hospital on a high-pressure ventilator to keep him alive.Meanwhile, at the University of Michigan, biomedical engineer Scott Hollister had  developed a 3D printed splint that could absorb into the body over time but could hold open airways in newborns for two to three years;