3-D Printing Could One Day Help Fix Damaged Cartilage in Knees, Noses and Ears (Video) (image) American Chemical Society Share Print E-Mail Caption Scientists can 3-D bioprint the shape of an ear using human cells that build up cartilage. Credit Photo and Video credit: American Chemical Society Usage Restrictions Please use credit provided. Share Print E-Mail Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.