Influence of Colgate mouthwash on corrosion resistance of orthodontic wire made of Ni-Ti alloy immersed in artificial saliva

Authors

  • Thangarajan Umamathi Sri Meenakshi Government Arts College for Women, Department of Chemistry, Madurai, India
  • P Arul Deepa St Antony’s College of Arts and Sciences, Corrosion Research Centre, Dindigul, India (Affiliated to Mother Teresa Women’s University, Kodaikanal, India)
  • D Delphin St Antony’s College of Arts and Sciences, Corrosion Research Centre, Dindigul, India (Affiliated to Mother Teresa Women’s University, Kodaikanal, India)
  • M Harthika St Antony’s College of Arts and Sciences, Corrosion Research Centre, Dindigul, India (Affiliated to Mother Teresa Women’s University, Kodaikanal, India)
  • V Pappathi St Antony’s College of Arts and Sciences, Corrosion Research Centre, Dindigul, India (Affiliated to Mother Teresa Women’s University, Kodaikanal, India)
  • A Preethi Christina St Antony’s College of Arts and Sciences, Corrosion Research Centre, Dindigul, India (Affiliated to Mother Teresa Women’s University, Kodaikanal, India)
  • T Priyadharshini St Antony’s College of Arts and Sciences, Corrosion Research Centre, Dindigul, India (Affiliated to Mother Teresa Women’s University, Kodaikanal, India)
  • R Yuasri St Antony’s College of Arts and Sciences, Corrosion Research Centre, Dindigul, India (Affiliated to Mother Teresa Women’s University, Kodaikanal, India)
  • Anitha Nilavan St Antony’s College of Arts and Sciences, Corrosion Research Centre, Dindigul, India (Affiliated to Mother Teresa Women’s University, Kodaikanal, India)
  • Susai Rajendran St Antony’s College of Arts and Sciences, Corrosion Research Centre, Dindigul, India (Affiliated to Mother Teresa Women’s University, Kodaikanal, India); and Pondicherry University, Centre for Nanoscience and Technology, Puducherry, India
  • Časlav Lačnjevac University of Belgrade, Faculty of Agriculture, Serbia

Abstract

This study investigates the corrosion resistance of orthodontic wire made of Ni-Ti alloy when immersed in artificial saliva, both in the absence and presence of Colgate mouthwash. The evaluation was carried out using potentiodynamic polarization techniques and electrochemical impedance spectroscopy (EIS). Polarization results show that the presence of Colgate mouthwash reduces the corrosion resistance of the Ni-Ti alloy, as indicated by a decrease in linear polarization resistance and an increase in corrosion current. EIS analysis confirms this trend, revealing reductions in charge transfer resistance, impedance magnitude, and phase angle, along with an increase in double-layer capacitance. These findings suggest that the aggressive components in Colgate mouthwash accelerate corrosion processes. Therefore, individuals wearing orthodontic appliances composed of Ni-Ti alloy are advised to avoid using Colgate mouthwash to prevent potential degradation of their dental wires.

Keywords:

Ni-Ti alloy, corrosion resistance, orthodontic wire, artificial saliva, Colgate mouthwash, polarization, electrochemical impedance spectroscopy (EIS).

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Published

30-06-2025

Issue

Vol. 3 No. 2 (2025): Settings Corrosion Behavior of Biomaterials

Section

Corrosion Behavior of Biomaterials

License

Copyright (c) 2025 Thangarajan Umamathi, P Arul Deepa, D Delphin, M Harthika, V Pappathi, A Preethi Christina, T Priyadharshini, R Yuasri, Anitha Nilavan, Susai Rajendran, Časlav Lačnjevac

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