Dentin's Biological Structure (IMAGE) Charité - Universitätsmedizin Berlin Caption Dentin's biological structure: tubules and mineral nanoparticles are embedded in a network of collagen fibers. Credit Image: Jean-Baptiste Forien, © Charité - Universitätsmedizin Berlin Usage Restrictions None License Licensed content 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.