Carbonated hydroxyapatite (Inorganic tooth mineral) (HAp)

Inorganic tooth mineral surfaces are predominantly composed of carbonated hydroxyapatite, a crystalline calcium phosphate mineral that provides the structural framework for dental enamel and dentin (Source: NIH, StatPearls). These surfaces serve as the primary defense against mechanical wear and the acidic byproducts of cariogenic bacteria, which can lead to mineral loss and cavitation (Source: PubMed). The mineral surface is highly dynamic, participating in continuous ion exchange with saliva, which allows for the natural repair process known as remineralization (Source: Journal of Dental Research). Therapeutic strategies target these surfaces to enhance their chemical stability, most notably through the use of fluoride to create fluorapatite, which is significantly more resistant to acid-induced demineralization (Source: CDC). Furthermore, in cases of dentin hypersensitivity, the mineral surface of the dentin is treated to occlude open tubules, thereby preventing the movement of fluid that triggers pain (Source: StatPearls). This target is unique in pharmacology as it involves a mineral substrate rather than a protein-based receptor or enzyme. Modern dental materials also aim to mimic these surfaces through biomimetic mineralization to restore lost tooth structure (Source: Nature Materials).

Other names

Tooth enamel mineralDentin mineralCalcium hydroxyapatiteDental mineral surfaceInorganic tooth mineral surfaces

The primary mechanism involves the substitution of hydroxyl ions in the hydroxyapatite lattice with fluoride ions to form fluorapatite, which has a lower solubility product and higher acid resistance (Source: CDC). Additionally, drugs like CPP-ACP provide a reservoir of bioavailable calcium and phosphate ions to drive the remineralization equilibrium toward mineral gain (Source: Journal of Dentistry). For hypersensitivity, agents physically or chemically occlude the dentinal tubules on the mineral surface to block hydrodynamic stimuli (Source: StatPearls).