3D printing refers to the creation of three-dimensional objects by additive manufacturing, starting from a digital 3D model. The digital model is produced with dedicated software and subsequently processed to be then created with different technologies, including the one that builds prototypes layer by layer, through a 3D printer. 3D printing, also called rapid prototyping, is an additive technology that allows you to create an object layer by layer starting directly from a 3D CAD model.