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<p>In the present study the surface qualities of the orthodontic stainless austenitic steel brackets, modified through techniques commonly used in its recycling, specifically, the techniques of sandblasting and direct flamed were compared with a new technique of surface modification known as <i>electropolishing with passivation</i>. Through electrochemical tests such as Electrochemical Impedance Spectroscopy (EIS), Tafel extrapolation and cyclic potentiodynamic polarization all the corrosion processes for the material were evaluated in simulated physical medium, it means the mouth cavity. This one was simulated through an electrolytic assembly with three electrodes and one experimental physiological medium composed by artificial saliva Afnor at 37&#xa0;°C. The results gathered evidenced that sandblasting produced the best protection qualities towards corrosion in the simulated mouth environment. The electropolishing technique and passivation showed good characteristics regards to the direct flaming brackets. However, sandblasting technique showed the best results in the specimen tested. Based on the facts previously mentioned, the recycling of metallic brackets at the surface level is an issue of great importance in the current orthodoncy field due to the fact that recycling presents important variables which influence the strength of adhesion to the teeth and the liberation of ions into the body.</p>

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Electrochemical Evaluation in Artificial Saliva of Orthodontic Brackets Recycled by Electrolytic Polished, Flamed and Sandblasting

  • 期刊论文

  • 发表日期：

    2026年2月19日

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  • Alejandro Martinez-Amariz,
  • Hugo Armando Estupiñan Duran,
  • Ingrith Carolina Castellanos Cordero,
  • Darío Yesid Peña Ballesteros,
  • Adan Y. León

摘要

In the present study the surface qualities of the orthodontic stainless austenitic steel brackets, modified through techniques commonly used in its recycling, specifically, the techniques of sandblasting and direct flamed were compared with a new technique of surface modification known as electropolishing with passivation. Through electrochemical tests such as Electrochemical Impedance Spectroscopy (EIS), Tafel extrapolation and cyclic potentiodynamic polarization all the corrosion processes for the material were evaluated in simulated physical medium, it means the mouth cavity. This one was simulated through an electrolytic assembly with three electrodes and one experimental physiological medium composed by artificial saliva Afnor at 37 °C. The results gathered evidenced that sandblasting produced the best protection qualities towards corrosion in the simulated mouth environment. The electropolishing technique and passivation showed good characteristics regards to the direct flaming brackets. However, sandblasting technique showed the best results in the specimen tested. Based on the facts previously mentioned, the recycling of metallic brackets at the surface level is an issue of great importance in the current orthodoncy field due to the fact that recycling presents important variables which influence the strength of adhesion to the teeth and the liberation of ions into the body.