Outcome Definitions in Additively Manufactured Subperiosteal Implants: A Scoping Review and Proposed Minimum Reporting Set

This scoping review maps how survival, success, and soft-tissue framework exposure are defined and measured across the literature on additively manufactured (CAD/CAM, 3D-printed) subperiosteal dental implants. Short-term framework survival is consistently high, but the dominant complication is exposure of the framework through the overlying soft tissue, and long-term cohorts show survival and success diverging markedly over time. The one existing systematic review could not proceed to meta-analysis because of heterogeneity in outcome definitions rather than a shortage of studies. Recent consensus work has produced a core outcome set for the edentulous maxilla, but its scope excludes subperiosteal-specific soft-tissue exposure. This review will chart the definitional heterogeneity across the field and propose a subperiosteal-specific minimum reporting set aligned with the existing core outcome set. Conducted and reported in accordance with PRISMA-ScR. This is a reporting proposal derived from a scoping review, not a Delphi-consented core outcome set.