Dental prosthesis and component thereof

A dental component, wherein

• the dental component comprises hydroxyapatite fine particles on its surface,
• the hydroxyapatite fine particles are sintered bodies,
• the hydroxyapatite fine particles have a mean particle size of 10 to 1,000 nm,
• the hydroxyapatite fine particles are attached to the dental component via covalent bonding,
• the covalent bonding is formed by reacting a reactive group of the component thereof and a reactive group of hydroxyapatite fine particles, and two or more reactive groups of a linker, and
• a surface coverage of the hydroxyapatite fine particles is 15 to 60%, and the hydroxyapatite fine particles are substantially free of calcium carbonate,
• the hydroxyapatite fine particles are attached to the dental prosthesis via covalent bonding,
• the covalent bonding is formed by reacting a reactive group of the dental prosthesis,
• a reactive group of hydroxyapatite fine particles, and two or more reactive groups of a linker compound,
• the amount of calcium carbonate in the hydroxyapatite fine particles is equal to or lower than 0.1/99.9 of formula weight,
• wherein the surface coverage is an area ratio of a portion corresponding to the hydroxyapatite fine particles to a portion corresponding to a substrate of the component,
• wherein a weight loss of 2% or more with endothermic change is not observed in a range of 650° C. to 800° C. when measured with thermal gravimetric-differential thermal analysis, and
• wherein an absorbance plot calculated by the Kubelka-Munk equation from a spectrum obtained in a FT-IR measurement does not show a peak near 877 cm−1 when the peaks appearing in wavenumbers of 860 cm−1 to 890 cm−1 are separated.