| 摘要 |
PROBLEM TO BE SOLVED: To provide a fluoro aluminosilicate glass powder capable of improving acid resistance of dental glass ionomer cement, and to provide a production method thereof.SOLUTION: In a fluoro aluminosilicate glass powder of this invention, a lanthanum compound to be eluted in the presence of polycarboxylic acid and water, is present only in surface layers of this powder particles, preferably with an amount of the lanthanum compound of 1 to 5 wt.% in terms of lanthanum oxides. This fluoro aluminosilicate glass powder is produced by mixing an aqueous solution containing the lanthanum compound, preferably an aqueous solution of a lanthanum compound such as an aqueous lanthanum nitrate solution and/or an aqueous lanthanum chloride solution, with a fluoro aluminosilicate glass powder containing no lanthanum, followed by heating. |
