U.S. medical device startup Nanochon was just approved to start human clinical trials in Canada of its 3D printed implant to repair damaged joint cartilage. The Chondrograft implant replaces a multi-surgery, weeks-long, process that leaves you on crutches for months (not fun!), with a minimally invasive one-step procedure for immediate load-bearing. The company says it's cost-effective, too, and could significantly reduce the number of eventual total joint replacements.