| 摘要 |
A buffered glass ionomer cement for dental use, including in combination, a mixture of a fine particle, 5-10 microns, powder consisting essentially by weight of -silica 20-30% -boron oxide 1-10% -aluminum oxide 10-20% -aluminum fluoride 1-10% -calcium fluoride 30-40% -phosphorus pentoxide 1-5% -ammonium fluoride 1-10% - plus five to twenty percent of the weight of the above of zinc oxide and zero to ten percent of titanium dioxide, and a liquid component comprising, by weight polyacrylic acid of low molecular weight, 40% solution in water-100-80% by weight, d-tartaric acid-0-20%. The powder and the liquid component are mixed together in a ratio of from 1:1 to 5:3 by weight.
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