Hydroxyapatite (enamel regeneration context) (HAP)

Hydroxyapatite is a naturally occurring mineral form of calcium apatite, comprising the main inorganic structural component of human enamel and bone. Enamel hydroxyapatite regeneration refers not to a specific biological target such as an enzyme or receptor, but to the use or induction of hydroxyapatite mineral formation for the repair and remineralization of tooth enamel lost to caries, acid wear, or developmental defects. In dental care, synthetic or biomimetic hydroxyapatite is used to restore enamel function, providing a structural barrier, facilitating remineralization, and protecting against further demineralization. The process involves direct deposition and crystal growth on the tooth surface, sometimes enhanced with biomimetic strategies such as polymer templates (e.g., PAMAM dendrimers). Hydroxyapatite is distinct from canonical drug targets, as it is a physical mineral and not a molecular receptor, enzyme, or transporter[1][2][3][4][5][7]. **Note:** Hydroxyapatite is *not* a therapeutic target in the conventional sense. It is a mineral substrate used as a treatment material. The phrase “enamel hydroxyapatite regeneration” does not refer to a molecular target but rather a therapeutic process or mechanism. Therefore, this entry is marked as “is_incorrect: true” for being a process not a druggable biological target.

Other names

Synthetic enamelArtificial enamelBiomimetic hydroxyapatiteNano-hydroxyapatiten-HAPCalcium phosphate

Surface mineral deposition (formation of protective hydroxyapatite layer on enamel) ; Calcium and phosphate ion release supporting remineralization ; pH buffering via neutralization of bacterial acids ; Physical blocking of open dentinal tubules (sensitivity relief) ; Scaffold for biomimetic enamel growth