
The study examined the effect of Punica granatum extract (PGE) on oral multispecies biofilms. Lyophilized pomegranate peel extracts were tested at various concentrations (10%, 20%, 30%) on biofilms grown on hydroxyapatite discs. Results showed that PGE effectively killed bacteria in 1- to 3-week-old biofilms, with 30% PGE demonstrating superior antibiofilm activity (37%–55.3% bacteria killed) compared to 2% chlorhexidine (CHX), which had an effectiveness range of 25.2%–48.7%. PGE alone or combined with CHX showed better results than CHX alone, and older biofilms were more resistant to treatment. These findings suggest that PGE could be a potent alternative or adjunct to conventional antimicrobial agents in oral biofilm management.
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