An Examination of the Effect of Listerine Mouthwash on the Corrosion Characteristics of Orthodontic Wire Composed of Ss316l Alloy in Simulated Saliva by Electrochemical Impedance Spectra

Orthodontic appliances are frequently fabricated from corrosion-resistant alloys such as stainless steel. However, the complex oral environment, which includes exposure to various mouthwashes, can influence the electrochemical stability of these materials. This study investigates the corrosion behavior of orthodontic wire composed of SS 316L alloy in artificial saliva, both in the absence and presence of Listerine mouthwash, using Electrochemical Impedance Spectroscopy (EIS). The electrochemical parameters—including charge transfer resistance (Rt), impedance, phase angle, and double layer capacitance (Cdl)—were systematically analyzed. The results indicate that Listerine mouthwash enhances the corrosion resistance of SS 316L alloy, as evidenced by increased Rt, impedance, and phase angle, along with reduced Cdl. These findings support the safe use of Listerine mouthwash by individuals with orthodontic wires made of SS 316L alloy.