Targeting Biofilms With Nanotechnology: A Comparative Study of Silver and Selenium Nanoparticles

Area of Science:

• Nanotechnology in Dentistry
• Antimicrobial Agents
• Oral Microbiology

Background:

• Silver fluoride effectively treats early childhood caries but causes tooth discoloration.
• Nanotechnology presents an alternative to overcome aesthetic limitations of silver fluoride.
• Novel antimicrobial formulations are needed for dental caries management.

Purpose of the Study:

• To evaluate the biofilm inhibition potential of silver and selenium nanoparticles.
• To compare nanoparticle efficacy against oral pathogens Streptococcus mutans and Candida albicans.
• To explore natural capping agents for nanoparticle antimicrobial activity.

Main Methods:

• Microdilution assays were used to determine minimum biofilm inhibitory concentrations.
• Percentage inhibition was measured on single- and dual-species biofilms.
• Six types of silver and selenium nanoparticles capped with natural materials were tested.

Main Results:

• Silver nanoparticles, especially casein and citrate-capped, exhibited significant biofilm inhibition (91-94%).
• Efficacy of silver nanoparticles was comparable to silver nitrate and a commercial silver fluoride product.
• Selenium nanoparticles demonstrated moderate efficacy only at high concentrations.

Conclusions:

• Silver nanoparticles possess substantial biofilm inhibitory effects against oral pathogens.
• Further research is needed to assess efficacy in multispecies biofilms and long-term stability.
• Nanoparticle-based formulations show promise as improved dental caries treatments.