Plaque biofilm matrix (null)

The plaque biofilm matrix is not a single molecule or classical molecular target, but rather a complex, heterogeneous extracellular structure that surrounds bacterial communities in dental plaque[1][3][6][7]. It is composed primarily of exopolysaccharides (such as glucans and fructans produced by bacterial enzymes), extracellular DNA, proteins, lipids, and other macromolecules derived from both the resident microbiota and the host[1][3][6][7]. The matrix is essential for biofilm stability, functioning to maintain the spatial arrangement of microorganisms, protect against physical and chemical insults—including antimicrobials—and to mediate adhesion to tooth surfaces[1][2][3]. It facilitates the development of cariogenic (cavity-causing) and periodontopathogenic (gum disease–causing) communities by creating microenvironments with gradients in pH, nutrients, and oxygen[2][3]. The structure and composition of the matrix enable pathogens to persist in the oral cavity despite host defense mechanisms and therapeutic interventions[3][6]. Because it is not a specific molecular entity, the “plaque biofilm matrix” is not classified as a receptor, enzyme, or traditional druggable target, but targeting its structural components (notably exopolysaccharides and extracellular DNA) is an emerging strategy in oral disease management[1][3][6].

Other names

Dental plaque extracellular matrixOral biofilm matrixExtracellular polymeric substance of dental plaque

Disruption of exopolysaccharide network; Destabilization of matrix via enzymatic or chemical means; Reduction/neutralization of extracellular DNA (eDNA)