Once the temporary denture is removed, the first template (dental support) is positioned to prepare the holes of the lateral pins. We proceed with the extraction of the remaining teeth and the opening of a flap from area 35 to area 45; the second mask is positioned to evaluate the areas to be remodelled based on the contact points. It was not possible to create an open mask as the bone thickness needed to be removed was very thin, which would have made it less resistant with the consequent risk of rupture or flexion during surgery. When the second mask is stably repositioned without any contact or problems, bringing the lateral pin holes in correspondence to the previously prepared holes, it will be possible to insert the third template and insert the implants according to the project. Once the implants have been inserted, the surgical guide is removed and the customized abutments are positioned; the edges are then sutured, and the PMMA structure is positioned, adapted and functionalized before cementing it. Initial situation of the patient – x-ray exam Cone Beam.