Dental plaque biofilm matrix and salivary pellicle components (EPS-ASP complex)

The dental plaque biofilm matrix and salivary pellicle components constitute the protective and structural environment for oral microorganisms. The acquired salivary pellicle (ASP) is a thin, acellular film composed of proteins, glycoproteins, and lipids derived from saliva that adsorbs onto the tooth enamel, serving as the initial site for bacterial adhesion (Siqueira et al., 2012, Journal of Dental Research). Following adhesion, bacteria produce an extracellular polymeric substance (EPS) matrix, primarily composed of glucans, fructans, and extracellular DNA, which provides structural integrity and protection against antimicrobial penetration (Koo et al., 2013, Cold Spring Harbor Perspectives in Medicine). This complex is a primary therapeutic target in oral health, as its disruption is essential for preventing dental caries and periodontal disease (Bowen et al., 2018, JDR Clinical & Translational Research). Pharmacological interventions often target the enzymatic production of the matrix, such as inhibiting glucosyltransferases, or use surfactants and antimicrobials to destabilize the pellicle-matrix interface (StatPearls, 2023). Understanding the biochemical composition of this matrix is critical for developing agents that can penetrate the biofilm and reach the underlying tooth surface.

Other names

Acquired salivary pellicleExtracellular polymeric substance matrixOral biofilm matrixDental plaque matrixExopolysaccharide matrix

Disruption of bacterial adhesion to the pellicle, enzymatic degradation of extracellular polysaccharides (EPS), alteration of surface tension to prevent pellicle formation, and sequestration of antimicrobial agents within the matrix to provide sustained release.