Abstract
In recent years, titanium prosthetics have been widely used in clinical dentistry. However, there are reports that titanium plates were discolored by some denture cleaner. This study investigated the cause of discoloration by measuring the pH of denture cleaners and by surface analysis of discolored specimens using EPMA and XPS. Severe discoloration was observed with denture cleaners with a highly alkaline range. Discoloration was regarded as due to roughness caused by corrosion. The degree of discoloration depended on the thickness of the oxide film.