The intra-oral scanner (IOS) is used mainly to generate direct optical dental impressions, relieving patients of the traditional and often cumbersome procedure of old. A small device is used to scan over the surface of the teeth and gums. Similar to other three-dimensional scanners, it projects a light source (laser or structured light) onto the dental arches, including natural teeth, prepared teeth and implant scan-bodies. The images of the dentogingival tissues (as well as the implant scan-bodies) captured by imaging sensors are processed through scanning software, which generates point clouds. These point clouds are then triangulated by the same software, creating a 3D surface model (mesh). The 3D surface models of the dentogingival tissues are the result of the optical impression and are the ‘virtual’ alternative to traditional plaster moulds.