DOI:

10.37988/1811-153X_2024_4_89

Effect of alkaline disinfectants on microbial adhesion and anticorrosion properties of stainless steel medical instruments with cermet coatings

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Authors

  • A.V. Deshev 1, head of the Digital Dentistry Lab
    ORCID: 0009-0005-0583-5044
  • M.Sh. Mustafayev 1, Doctor of Science in Medicine, full professor of the Prosthodontics Department, director of the Dentistry and maxillofacial surgery Institute
    ORCID: 0000-0002-4042-9421
  • R.Sh. Gvetadze 2, Russian Academy of Science corresponding member, Doctor of Science in Medicine, professor, Director of the Dental Research Institute
    ORCID: 0000-0003-0508-7072
  • T.V. Tsareva 2, PhD in Medical Sciences, associate professor of the Microbiology, virology, immunology Department
    ORCID: 0000-0001-9571-0520
  • M.S. Antipov 3, postgraduate
    ORCID: 0000-0002-7498-428X
  • P.M. Bazhin 3, Doctor of Science in Engineering, vice-director
    ORCID: 0000-0003-1710-3965
  • S.D. Arutyunov 2, Doctor of Science in Medicine, full professor of the Digital dentistry and prosthodontics Department
    ORCID: 0000-0001-6512-8724
  • 1 Kabardino-Balkarian State University, 360004, Nalchik, Russia
  • 2 Russian University of Medicine, 127006, Moscow, Russia
  • 3 Merzhanov Institute of Structural Macrokinetics and Materials Science of the Russian Academy of Sciences, 142432, Chernogolovka, Russia

Abstract

The development of modern technologies for disinfection and sterilization of medical instruments is an extremely urgent task, which is determined by the aggressive effects of the physical and chemical agents used. In recent years, titanium nitride-based protective coatings have been used to increase the life of medical instruments, which significantly increase the cost of the product compared to uncoated counterparts. The purpose of the study is to compare the corrosion resistance of samples with protective coatings under the influence of alkaline disinfectants, taking into account the assessment of the use of the original microbial adhesion technique and confocal electron microscopy in an in vitro experiment.
Materials and methods.
Options for forming optimal cermet coatings of TiC-NiCr-based corrosion-resistant disinfectants using the electrospark ligation method for dental instrument samples were investigated. Have been used alkaline disinfectants “Wendelin”, “Megadez Orto”, “Trilox” of domestic production were used. To control the effect of disinfectants before and after exposure, a standard microbial adhesion study was performed with strains of S. aureus, B. cereus, C. albicans, C. glabrata. Surface roughness and topography were evaluated by scanning electron microscopy.
Results.
It was found that the formed protective coatings are not subject to corrosion when exposed to the studied ET solutions at room temperature. In contrast, the control samples (uncoated) showed an increase in microbial adhesion and signs indicating degradation and corrosion dependent on the concentration of ET. Optimal results for the microbial adhesion of S. aureus and C. albicans were obtained with sample 3 (Ra=3.26 μm), and on the contrary, the worst results were obtained with sample 4, which had the most significant thickness (40 μm) and the degree of roughness of the coating (Ra=3.73 μm).
Conclusion.
Protective coatings made of solid solutions based on iron: Fe241Ti9, Fe47C3, Cr-Ni-Fe-C and the strengthening phase of titanium carbide TiC on the surface of samples ensure their corrosion resistance when exposed to working solutions of alkaline ET, and when using ET “Trilox” also with concentrate.

Key words:

disinfectants, microbial adhesion, corrosion, medical instruments, cermet coatings, scanning electron microscopy

For Citation

[1]
Deshev A.V., Mustafayev M.Sh., Gvetadze R.Sh., Tsareva T.V., Antipov M.S., Bazhin P.M., Arutyunov S.D. Effect of alkaline disinfectants on microbial adhesion and anticorrosion properties of stainless steel medical instruments with cermet coatings. Clinical Dentistry (Russia).  2024; 27 (4): 89—97. DOI: 10.37988/1811-153X_2024_4_89

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Received

August 7, 2024

Accepted

October 20, 2024

Published on

December 17, 2024