To overcome the original surgical technique (OST) drawbacks, a novel approach, named The Zygoma Anatomy-Guided Approach (ZAGA), has been coined. With this refinement, no window or slot is opened. A classification describing the variations of the zygomatic buttress anatomy will help the surgeon to choose the osteotomy. Accordingly, the path of the implant body may vary from a total intra-sinus to a total extra-sinus one. The final achievement will be a patient specific therapy. Rehabilitation using zygomatic implants (ZI), especially if those implants are located extra maxillary, is different...