Patient-specific Subperiosteal Implant for Dental Rehabilitation of Severe Atrophic Maxilla: A Single Institution Series

This retrospective study evaluated patient-specific subperiosteal implants (IPS) for dental rehabilitation in severely atrophic maxillae. Eight patients with Cawood and Howell class VI atrophy were treated between 2021 and 2025. Rehabilitation was planned with prosthodontists and bioengineers using virtual surgical planning, CAD/CAM technology, and selective laser melting to create custom titanium implants. All implants were placed successfully without major complications. Follow-up ranged from 2 to 20 months (mean: 8.6 y). No infections, implant mobility, or inflammation were observed. Four patients completed final restorations, while 4 remain in progress. One patient experienced minor gingival retraction, and several reported transient maxillary hypoesthesia, which resolved or improved within 5 weeks. IPS implants appear to provide a reliable, graft-free solution for maxillary atrophy. Larger studies are needed to confirm long-term success and refine patient selection.