Patent ID: 7740482

Claim:
A dental composition comprising: (1) at least one cationically reactive compound (A); (2) at least one dental filler (B); (3) optionally at least one dispersant (C) comprising at least one organic polymer or copolymer; (4) at least one cationic photoinitiator (D); (5) and optionally at least one photosensitizer (E), where said composition comprising at least one dental filler (B) having been treated via a process (I) comprising the following steps: a) mixing in a solvent medium the at least one dental filler (B) with at least one organosilicon coupling agent (F) of the formula: in which formula: R is a hydrogen or a linear or branched C 1 -C 4 alkyl radical, R 1 is a linear or branched alkyl radical or a phenyl radical, x is equal to 0, 1 or 2, and X is defined by one of the following formulae: where: E and D which are identical or different radicals chosen from linear or branched C 12 -C 12 alkylene, z is equal to 0 or 1; n is equal to 0 or 1; p is equal to 0, 1, 2, 3, 4, 5 or 6; R 2 , R 3 , R 4 , R 5 , R 6 , R 7 and R 8 are radicals, which may be identical or different, representing a hydrogen or a linear or branched C 1 -C 12 alkyl; b) evaporating the solvent to obtain an intermediate dental filler (B-1), c) heat treating the intermediate dental filler (B-1) to allow the coupling reaction between the intermediate dental filler (B-1) and the coupling agent (F) and thus obtain an intermediate dental filler (B-2), d) mixing the intermediate dental filler (B-2) in a solvent medium with at least one compound (G) comprising at least one oxirane, oxetane, alkenyl ether and/or carbonate function, e) evaporating the solvent to obtain an intermediate dental filler (B-3), and f) heat treating the intermediate dental filler (B-3) to allow the reaction between the intermediate dental filler (B-3) and the compound (G) and thus to obtain a treated dental filler (B-4).