Sweden Team led by Paul Gatenholm at the Wallenberg Wood Science Center has discovered scaffolds to regenerate Cartilages using 3D printed technology. These 3D printed chondrocytes when implanted in living mice, resulted in cartilage production. The team is currently working to explore it's use in human clinical trials.
Source: http://www.cnet.com/news/3d-printed-cartilage-could-restore-ears-noses-knees/