The aim of this study was to define a comprehensive protocol (planning, design, placement, prosthetic rehabilitation) for customized subperiosteal implants in atrophic maxilla. A descriptive case series study was conducted with a purposive sample of six patients who underwent surgery with customized subperiosteal implants. Rigorous inclusion and exclusion criteria were established. Clinical, radiographic, and digital data were collected, recorded in Windows Excel, and analyzed with IBM SPSS software, version 27. The variables analyzed included demographic characteristics, preoperative patient preparation, planning, design and fabrication of the subperiosteal implant, surgical procedure, prosthetic rehabilitation, and follow-up. The results showed that 83.3 % of patients were female, with a mean age of 65.5 years. Most exhibited bone atrophy classified as Class V and VI according to Cawood and Howell. All implants were fabricated from Grade V Ti using direct laser sintering, with a monoblock design in 83.3 % of cases. Surface treatment techniques such as sandblasted, large grits and acid etched (SLA) were employed to enhance osseointegration. The mean duration of surgery was 64.1 minutes, with an average follow-up period of 18.33 months. A 100 % implant survival rate was reported, though minor complications such as mucositis and structural exposure were observed. Customized subperiosteal implants represent an effective and less invasive solution for patients with severe bone atrophy. Implementing a comprehensive protocol improves quality of life and redu- ces treatment time, establishing these implants as a viable alternative to more complex bone regeneration techniques. Further research is needed to standardize these procedures and optimize clinical outcomes.