Antibacterial Effectiveness of a Silver-Copper Nano-Coating to Improve Personal Protective Equipment Used in the Medical and Dental Fields
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Abstract
Introduction: Personal protective equipment is used to protect healthcare personnel, such as doctors and dentists, from contact with potentially pathogenic microorganisms that may be present in aerosols generated by fluids like blood and saliva. Objective: To evaluate the antibacterial effect of the silver-copper nano-coating (SakCu®) deposited on polypropylene textiles on bacterial species frequently associated with nosocomial infections and microorganisms from subgingival biofilm samples of patients with periodontitis, simulating contact with contaminated droplets generated during dental care. Materials and Methods: The in vitro experimental study was carried out by means of tests with nosocomial strains of the following bacterial species: Escherichia coli, Pseudomonas aeruginosa, Staphylococcus aureus and Staphylococcus epidermidis. For the clinical trials, subgingival biofilm samples were taken from five patients diagnosed with periodontitis. All tests consisted of maintaining contact of the microorganisms with the nano-coating for 24 hours. Results: The results showed a decrease in the cell viability of nosocomial strains when they were in contact with the nano-coating, with P. aeruginosa being the bacteria that presented the greatest sensitivity to contact, followed by S. epidermidis and S. aureus. However, E. coli appeared to be unaffected by the nano-coating. Regarding the evaluation of bacteria from the subgingival biofilm samples, there was a decrease of between 32.9% and 80% in the number of microorganisms that were exposed to the nano-coating, compared to the number of bacteria present on the uncoated polypropylene textiles. Conclusions: The results demonstrate the potential of silver-copper nano-coating for the use in personal protective equipment made from polypropylene textiles, such as gowns, caps, and face masks, commonly used in clinical settings.
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References
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