For the surface treatment a sand-blasting process was used, followed by a double acid attack. In the images, increasing the magnification, it is possible to observe how the macroscopic aspects of the screw (spire, cutting edge) are not affected by the treatment and how the surface is free from processing residue. The dual-beam roughness typical of SLA treatment can be observed and it contains large cavities due to large grit blasting on which is superimposed the micro-roughness due to treatment with acids. The micro-roughness illustrated in the figures highlights the typical three-dimensional topography, which gives these surfaces “sponge-like” characteristics that are the basis of their excellent clinical performance In fact, the very short peak-to-peak distance, about 1 micrometer, stimulates both the activity of osteogenic cells and the capillary penetration of the blood in the surface structure, offering very favorable characteristics to stimulate bone regeneration, as described in many articles on this topic. This unique combination of long-range roughness (large grit sand-blasting) and short-range (acid etching) is a substrate favourable to cell regrowth that adequately promotes cell differentiation. The level of roughness is Ra 1.42 ± 0.12.