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Galvanic Corrosion Of Metal Injection Molded (Mim) And Conventional Brackets With Nickel-Titanium And Copper-Nickel-Titanium Archwires, Barbara Siargos, T. Gerard Bradley, Myrsini Darabara, George Papadimitriou, Spiros Zinelis

T. Gerard Bradley

Objective: To compare the galvanic coupling of conventional and metal injection molded (MIM) brackets with commonly used orthodontic archwires. Materials and Methods: Six of each type of bracket were suspended in lactic acid along with a sample of orthodontic wire (three nickel-titanium and three copper-nickel-titanium) for 28 days at 37°C. The potential differences between the wires and brackets were recorded per second throughout the duration of the experiment. Results: The MIM brackets exhibited potential differences similar to those seen for the conventional brackets. The greatest potential difference was found for MIM brackets with nickel-titanium wires (512 mV), whereas MIM brackets …