Dentin tubules and tooth hydroxyapatite surfaces

Dentin tubules are microscopic, fluid-filled channels that extend from the dental pulp to the enamel-dentin junction, serving as a conduit for sensory stimuli and nutrient transport (StatPearls, 2023). Tooth hydroxyapatite surfaces constitute the primary inorganic component of enamel and dentin, providing the structural hardness required for mastication (PubChem, 2024). In the context of dental disease, the exposure of dentin tubules leads to hypersensitivity via the hydrodynamic theory, while the demineralization of hydroxyapatite results in dental caries and erosion (NIH, 2022). Pharmacological interventions target these structures by occluding the tubules with mineral precipitates or polymers, or by promoting the epitaxial growth of new hydroxyapatite crystals using fluoride and calcium-based agents (Journal of Dentistry, 2021). These surfaces are unique as therapeutic targets because they involve inorganic-organic interfaces rather than traditional protein-ligand interactions.

Other names

Dentinal tubulesDental hydroxyapatiteTooth mineral surfaceEnamel hydroxyapatiteCrystalline calcium phosphate

The primary mechanisms of action involve the physical occlusion of dentin tubules to block fluid movement (hydrodynamic theory) and the chemical remineralization of hydroxyapatite surfaces to restore mineral density and provide acid resistance (Journal of Clinical Dentistry, 2020).