Polyphenolic beverages reduce initial bacterial adherence to enamel in situ

Area of Science:

• Oral microbiology
• Natural product chemistry

Background:

• Polyphenols possess antibacterial and antioxidant properties.
• Initial bacterial adherence to enamel is the first step in oral biofilm formation.

Purpose of the Study:

• To evaluate the impact of various polyphenol-rich beverages on initial bacterial adhesion to tooth enamel in situ.
• To assess the antibacterial effects of black tea, green tea, grape juice, Cistus tea, and red wine on oral bacteria.

Main Methods:

• Bovine enamel specimens were exposed to oral rinses with different beverages after pellicle formation.
• Bacterial adherence was quantified using DAPI staining and fluorescence in situ hybridization (FISH) for eubacteria and streptococci.
• Specimens were exposed intraorally for varying durations (30 and 120 minutes) with controls.

Main Results:

• All tested beverages demonstrated a reduction in detectable bacteria.
• Red wine, Cistus tea, and black tea showed the most significant reduction in adherent bacteria (up to 66% vs. controls).
• FISH analysis confirmed a substantial impact of most beverages on bacterial populations.

Conclusions:

• Consumption of certain polyphenolic beverages can inhibit initial bacterial adherence to enamel.
• These findings suggest a potential role for these beverages in preventing oral diseases linked to biofilm formation.