This article presents a summary of 3D printers and the materials used. It was previously published in 3D Printing in Dentistry 2019/2020 by Irfan Ahmad and Fahad Al-Harbi, Quintessence Publishing. The article has been shortened and contains the orthodontic-relevant topics. Schlagwörter: 3D printing, 3D printer materials, CAD/CAM, materials