DENTAL GLASS IONOMER CEMENT COMPOSITIONS

A dental glass ionomer cement composition comprises: (a) 5 to 100 parts by weight of a polymer of an alpha - beta unsaturated carboxylic acid having a weight average molecular weight of 5,000 to 40,000, (b) 5 to 100 parts by weight of a fluoroaluminosilicate glass powder having an average particle size of 0.02 to 10 mu m and a specific gravity of 2.4 to 4.0 and capable of reacting with said "polymer of an alpha - beta unsaturated carboxylic acid having a weight average molecular weight of 5,000 to 40,000", (c) 5 to 100 parts by weight of a polymerizable unsaturated organic compound having at least one CH2=C(R1)-COO-group wherein R1=H or CH3, (d) 0.01 to 5 parts by weight of a polymerization catalyst, (e) 2 to 50 parts by weight of water, (f) 0.01 to 20 parts by weight of a surface active agent, and (g) 0.01 to 5 parts by weight of a reducing agent, and optionally h. 0 to 50 parts by weight of an inorganic filler having an average particle size of 0.02 to 10 mu m and undergoing no reaction with said "polymer of an alpha - beta unsaturated carboxylic acid having a weight average molecular weight of 5,000 to 40,000".