Salivary pellicle and plaque biofilm matrix

The *salivary pellicle* is a thin, protein-rich film formed from saliva, crevicular fluid, and host debris that rapidly coats oral surfaces after cleaning[6][4]. It acts as a substrate for initial bacterial adhesion, leading to the development of the *plaque biofilm matrix*. This matrix is a highly organized, extracellular network primarily composed of polysaccharides (e.g., glucans, fructans), proteins, lipids, and extracellular DNA produced by resident oral microorganisms and host cells[1][5]. The plaque biofilm matrix protects bacteria from mechanical forces, antibiotics, and immune defenses, while fostering close microbial interaction through cell-cell signaling processes[3][1]. Its composition and structure are central to the pathogenesis of dental caries and gum disease, with potential links to several systemic diseases[5]. Approaches to disrupt or modify the pellicle and matrix are being explored for caries and periodontitis prevention[6][5]. Note that this “target” is much broader, encompassing a structural and microbial ecosystem rather than a singular therapeutic receptor or enzyme.

Other names

Dental pellicleacquired pellicledental plaque matrixextracellular polymeric substance (EPS) of plaque biofilm

- Disruption of matrix stability (e.g., by enzymatic degradation of EPS or eDNA)[5] - Inhibition of bacterial adhesion to pellicle[6] - Modification of pellicle composition to prevent biofilm formation[6]