▎ 摘　　要

NOVELTY - Treating surface of titanium substrate involves forming a nitrided surface by supplying nitrogen (N2) gas to a substrate including titanium or a titanium alloy, forming a porous layer by anodizing on the substrate on which the nitrided surface in an electrolyte solution containing at least one of phosphoric acid (H3PO4) and hydrofluoric acid (HF). USE - Method for treating surface of titanium substrate. ADVANTAGE - The method has the effect of advancing an effective and stable healing process, inhibits the adhesion of harmful bacteria present in the oral cavity, increases the adhesion and proliferation of periodontal tissues such as gingival fibroblasts or osteoblasts, periodontal surgical treatment when the titanium substrate treated in this way is used as a dental implant.