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Exploring antimicrobial soda-lime glasses as glaze alternatives for 4Y-PSZ

  • 0Department of Dental Materials and Prosthodontics, Institute of Science and Technology, São Paulo State University (UNESP), São José dos Campos, SP, Brazil.
Dental Materials : Official Publication of the Academy of Dental Materials +

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August 24, 2025

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August 24, 2025

View abstract on PubMed

Summary

This summary is machine-generated.

Two experimental glass coatings on 4Y-PSZ ceramics offer antimicrobial benefits without compromising mechanical or optical properties. The soda-lime (SL) coating demonstrated both immediate and lasting antimicrobial effects, inhibiting Candida albicans hyphae formation.

Area Of Science

  • Biomaterials Science
  • Dental Ceramics
  • Antimicrobial Materials

Background

  • 4Y-PSZ (tetragonal zirconia polycrystal) ceramics are widely used in dental restorations.
  • Developing functional coatings for dental ceramics is crucial for enhancing their clinical performance.
  • Investigating novel glass coatings for improved antimicrobial properties without compromising existing material characteristics is essential.

Purpose Of The Study

  • To evaluate the mechanical, optical, and antimicrobial effects of experimental soda-lime (SL) and silver-containing soda-lime (Ag) glass coatings on 4Y-PSZ.
  • To compare these experimental coatings with a commercial glaze (G).

Main Methods

  • Experimental SL and Ag glass powders were applied and fused onto 4Y-PSZ disc specimens.
  • Coated specimens were analyzed for roughness, translucency, and biaxial flexural strength.
  • Microstructural analysis using scanning electron microscopy was performed.
  • Antimicrobial efficacy against Candida albicans, Streptococcus sanguinis, and Streptococcus mutans was assessed using colony-forming unit (CFU) assays on initial and aged specimens.

Main Results

  • Mechanical (flexural strength) and optical (translucency) properties, as well as roughness, were comparable across all groups (SL, Ag, G).
  • Both SL and Ag coatings exhibited antimicrobial activity against S. sanguinis and S. mutans.
  • The SL coating showed a notable reduction in C. albicans hyphal formation and maintained antimicrobial effects over time, unlike the Ag coating which required aging.

Conclusions

  • Experimental SL and Ag glass coatings can be applied to 4Y-PSZ without negatively impacting key mechanical and optical properties.
  • The SL coating provides significant, sustained antimicrobial benefits, including inhibition of C. albicans hyphae, making it a promising candidate for dental applications.
  • These findings suggest potential for enhanced functional dental restorations using novel glass coatings.

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