Plaque-forming oral bacteria

Plaque-forming oral bacteria refer to a diverse community of microorganisms that colonize the tooth surface to form a complex, structured biofilm known as dental plaque (NIH, 2023). Key species within this community include Streptococcus mutans, which is primarily responsible for acid production and dental caries, and Porphyromonas gingivalis, a major pathogen in periodontal disease (Marsh et al., 2011). These bacteria utilize dietary carbohydrates to produce organic acids that demineralize tooth enamel and synthesize extracellular polysaccharides that provide structural integrity to the biofilm (StatPearls, 2024). The biofilm environment protects the constituent bacteria from host immune defenses and increases their resistance to antimicrobial treatments compared to planktonic cells (Löe, 2000). Therapeutic strategies target these bacteria through mechanical disruption and the use of chemical agents like chlorhexidine, which disrupts cell membranes, and fluoride, which inhibits bacterial enzymes and promotes remineralization (PubChem, 2024). Managing these bacterial populations is essential for preventing oral diseases and reducing the risk of systemic conditions linked to oral pathogens, such as cardiovascular disease and endocarditis (NIH, 2023).

Other names

Dental plaqueOral biofilmCariogenic bacteriaPeriodontal pathogensDental biofilm

Anti-plaque agents function through several pathways: chlorhexidine and cetylpyridinium chloride disrupt bacterial cell membranes; fluoride inhibits the enzyme enolase to reduce acid production and interferes with bacterial transport systems; and essential oils disrupt cell walls and inhibit enzymatic activity (PubChem, 2024; StatPearls, 2024).