| abstract |
A filler having high water resistance and acid resistance, a high release function of ions such as fluorine ions, and capable of maintaining high aesthetics for a long period of time, and containing the filler, To provide a dental composite material excellent in water / acid resistance, ion release and aesthetics. A filler comprising at least one metal oxide and at least one water-soluble metal salt, wherein the metal oxide and the water-soluble metal salt form phases independent of each other. A method for producing a filler comprising a phase of the water-soluble metal salt comprising crystals of the water-soluble metal salt having an average particle size of 0.001 μm to 0.3 μm, the metal oxide and / or hydrolyzable organic metal A method for producing a filler, comprising mixing a hydrolyzate of a compound and an aqueous solution of the water-soluble metal salt, and then drying the obtained mixture. [Selection figure] None |