What is oral biofilm?
Dental plaque is an organized biofilm: a community of microorganisms attached to tooth and oral surfaces inside a protective matrix.
This structure matters because biofilm bacteria behave differently from isolated organisms. The matrix helps communities adhere, interact and resist environmental stress. When plaque is not regularly disrupted, the microbial environment can shift toward conditions associated with gingival inflammation or caries.
That is why physical plaque removal remains central even when a product targets microbial balance.
What actually removes plaque?
Brushing and interdental cleaning physically disrupt plaque, while fluoride toothpaste adds proven caries-prevention value.
No supplement should be positioned as a replacement for mechanical biofilm disruption. Technique, frequency and cleaning between teeth matter because a toothbrush does not reliably reach every proximal surface. Professional cleaning may be required where hardened calculus or periodontal pockets are present.
Why postbiotics are being studied for biofilm control
Postbiotic preparations are being studied because certain microbial components and metabolites can affect pathogen adhesion, biofilm formation and microbial interactions in laboratory models.
The supplied 2026 review discusses effects of lactobacilli-derived components against organisms such as Streptococcus mutans, Porphyromonas gingivalis and Aggregatibacter actinomycetemcomitans. The 2025 dental-caries systematic review similarly found many laboratory studies reporting effects on S. mutans growth, virulence genes and biofilm formation.
However, most of that caries evidence was in vitro. Laboratory inhibition is a useful mechanistic signal, not proof that a finished supplement removes plaque from human teeth.