Tuzlali, MesutBaki, Nagehan2026-04-042026-04-0420251025-58421476-8259https://doi.org/10.1080/10255842.2025.2584392https://hdl.handle.net/11616/109255This study evaluated seven bar materials-Titanium (Ti), Cobalt-Chromium (Co-Cr), Zirconia (Zr), Polyetheretherketone (PEEK), Carbon-Fiber-Reinforced PEEK (CFR-PEEK), 3D-printed resin (3D-Pr), and Polymethyl methacrylate (PMMA)-in the Trefoil implant system using three-dimensional finite element analysis under vertical and oblique loads. Stress distribution and prosthesis deformation were analyzed, and a Performance Index combining mass and deformation was calculated. Bar material mainly influenced deformation: metallic bars (Ti, Co-Cr, Zr) showed minimal, while non-metallic (3D-Pr, PMMA) showed higher deformation. Titanium had the best performance, followed by zirconia and CFR-PEEK. Selecting optimal bar materials enhances biomechanical efficiency in Trefoil prostheses.eninfo:eu-repo/semantics/closedAccessTrefoil implantbarprosthesistitaniumzirconiafinite element analysisArticle4123143210.1080/10255842.2025.25843922-s2.0-105021999822Q2WOS:001613847700001Q40000-0002-7602-8101