Corrosion Behavior of Dental Alloys Under Artificial Saliva Solution with Different pH Values

Authors

  • Yen-Hao Chang Combination Medical Device Technology Division, Medical Devices R&D service Department, Metal Industries Research & Development Centre, Luzhu District, Kaohsiung 82151, Taiwan
  • Yan-Ting Pan Department of Oral Hygiene, College of Dental Medicine, Kaohsiung Medical University, Kaohsiung 80708, Taiwan
  • Chih-Yeh Chao Department of Mechanical Engineering, National Pingtung University of Science and Technology, Pingtung 91201, Taiwan
  • Huey-Er Lee Department of Dentistry, Yuan’s General Hospital, Kaohsiung 80249, Taiwan
  • Ju-Hui Wu Department of Oral Hygiene, College of Dental Medicine, Kaohsiung Medical University, Kaohsiung 80708, Taiwan and Department of Dentistry, Kaohsiung Medical University Hospital, Kaohsiung 80708, Taiwan

DOI:

https://doi.org/10.12974/2311-8695.2022.10.1

Keywords:

Artificial saliva, Casting alloy, Corrosion resistance

Abstract

The purpose of this study was to investigate the corrosion behavior of four different dental casting alloys in artificial saliva solutions with varying pH values. Microstructures were observed using scanning electron microscopy. The corrosion behavior of the experimental alloys in artificial saliva was examined using potentiodynamic polarization measurements. The high noble alloy (Au-8.5Pt-2.6Pd-1.4In) exhibited better corrosion resistance with lower anodic current densities in the pH range of 3–5. The anodic current density of the noble alloy (Au-24.9Pd-19.0Ag-5.5In) decreased as the pH decreased. The noble (Pd-37.7Ag-8.5Sn) and base metal (Ni-25Cr-11.5Mo-1.4Si) alloys exhibited lower corrosion resistance with a relatively high current density at pH 3. Compared with noble alloys, base metal alloys exhibited good corrosion resistance in this study. This makes them a promising material for dental castings considering the complex pH changes in the oral environment.

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Published

14-06-2022

How to Cite

Chang, Y.-H., Pan, Y.-T., Chao, C.-Y., Lee, H.-E., & Wu, J.-H. (2022). Corrosion Behavior of Dental Alloys Under Artificial Saliva Solution with Different pH Values. The Journal of Dentists, 10, 1–6. https://doi.org/10.12974/2311-8695.2022.10.1

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Articles