Patent ID: 8426491

Claim:
A non-self-etching dental composition, comprising: a. about 0.25 to about 10% by weight polymerizable acidic compound, the polymerizable acidic compound including a mixture of at least one unsaturated phosphorus containing acid ester comprising dipentaerythritol penta acrylate phosphate (PENTA) and an a different unsaturated carboxylic acid monomer; b. a filler dispersion including a mixture having: (i) a polymerizable compound of about 10 to about 60% by weight of the dental composition, the polymerizable compound is prepared by reacting 2,2-bis[4-(2-hydroxy-3-methacryloyloxypropoxy)phenyl]propane (Bis-GMA) and hexamethylene diisocyanate (HMDI); and (ii) a silica particulate filler of about 3 to about 60% by weight of the dental composition, said silica particulate being dispersed in the polymerizable compound; (iii) wherein the mixture has an average particle size in the range of about 1 nm to about 100 nm; c. about 10 to about 60% by weight solvent; and d. a photopolymerization system capable of being activated by light, the photopolymerization system comprising a photoactive agent selected from the group consisting of camphorquinone; 2,4,6 trimethylbenzoyldiphenyl phosphine oxide; and ethyl (4-N,N-dimethylamino)benzoate.