Dental composition and method

A dental composition comprising

• (a) a polymer of an .alpha.-.beta. unsaturated carboxylic acid having a weight average molecular weight of 5,000 to 500,000,
• (b) a fluoroaluminosilicate glass powder having an average particle size of 0.02 to 50 .mu.m and a specific gravity of 2.0 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 500,000,
• (c) a polymerizable monomer and/or prepolymer,
• (d) a polymerization catalyst,
• (e) water,
• (f) ethylenically unsaturated organic acid, 20 to 40 equivalent weight percent salts of said ethylenically unsaturated organic acid, and
• (g) a reducing agent,
• said elutable glass filler (b) being adapted to elute cations which are reactive with said polyalkenoic acid (a), a substantial portion of said cations being strontium cations and said monomer and/or prepolymer (e) being non-reactive with cations from the elutable glass filler, said composition being adapted to form a substantially radiopaque polymeric product.

A dental composition comprising:

• (a) 0.5 to 30 parts by weight of a polymer of an .alpha.-.beta. unsaturated carboxylic acid having a weight average molecular weight of 5,000 to 500,000,
• (b) 10 to 90 parts by weight of a fluoroalumino-silicate glass powder having an average particle size of 0.02 to 50 .mu.m and a specific gravity of 2.0 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 500,000,
• (c) 1 to 60 parts by weight of a polymerizable monomer or prepolymer,
• (d) 0.5 to 30 parts by weight of water,
• (e) 1 to 60 parts by weight of ethylenically unsaturated organic acid and salts of said ethylenically unsaturated organic acid, said salts being 20 to 40 equivalent weight percent of said acid,
• (f) 0.01 to 5 parts by weight of a polymerization catalyst, and
• (g) 0.001 to 5 parts by weight of a reducing agent,
• said elutable glass filler (b) being adapted to elute cations which are reactive with said polyalkenoic acid (a), a substantial portion of said cations being strontium cations and said monomer and/or prepolymer (e) being non-reactive with cations from the elutable glass filler, said composition being adapted to form a substantially radiopaque polymeric product.

A method of treating a tooth consisting of dental compositions, comprising mixing a powder and polymerizable liquid in preselected proportions to form at least two dental compositions selected from the group consisting of cement, liner, base, restorative, core build-up, and pit and fissure sealant, and applying them to at least one tooth whereupon they are caused to harden wherein said dental compositions comprise

• a) polyalkenoic acid,
• b) elutable glass filler,
• c) an acid functional polymerizable organic ester, 20 to 40 equivalent weight percent salts of said acid functional polymerizable organic ester,
• d) water,
• e) polymerizable monomer and/or prepolymer, and
• f) polymerization catalyst system,
• said elutable glass filler (b) being adapted to elute strontium and fluoride cations which are reactive with said polyalkenoic acid (a) to form a substantially radiopaque polymeric product, and said monomer and/or prepolymer (e) being non-reactive with cations from the elutable glass filler.

A dental composition comprising a powder and liquid wherein said powder comprises

• (a) about 70-85 percent by weight strontium fluoroaluminosilicate glass,
• (b) about 0.7-0.9 percent by weight ethyl 4-dimethylaminobenzoate, and
• (c) about 15-30 percent by weight barium alumino borosilicate glass;
• and said liquid comprises
• (a) about 6-8 percent by weight polyacrylic acid,
• (b) about 6-8 percent by weight water,
• (c) about 26-32 percent by weight hydroxyethylmethacrylate,
• (d) about 26-32 percent by weight tetraethylene glycol dimethacrylate,
• (e) about 26-30 percent by weight dipentaerythritol pentacrylate phosphoric acid, dipentaerythritol pentacrylate phosphoric acid salts, said salts being 20 to 40 equivalent weight percent of said acid and
• (f) about 0.1-0.5 percent by weight camphorquinone,
• said elutable glass filler (b) being adapted to elute cations which are reactive with said polyalkenoic (a), a substantial portion of said cations being strontium and said monomer and/or prepolymer (e) being non-reactive with cations from the elutable glass filler, said composition being adapted to form a substantially radiopaque polymeric product.

A polymerizable liquid dental composition, comprising:

• 14.2 parts by weight polyacrylic acid;
• 28.5 parts by weight hydroxyethyl methacrylate;
• 0.1 parts by weight butylate hydroxytoluene;
• 28.5 parts by weight triethylene-glycol dimethacrylate;
• 28.5 parts by weight partially neutralized dipentaerythritol pentacrylate phosphoric acid ester and
• 0.2 parts by weight camphorquinone.