Two-paste type dental self-adhesive resin cement

A two-paste type dental self-adhesive composite resin cement consisting of a first paste and a second paste, which exhibits an effective shear bond strength for dentin,

• wherein, the first paste comprises, on a basis of 50% by weight of the first paste:
• (a)-(1) 8.0-22.5% by weight of a radical polymerizable monomer,
• (d)-(1) 27.45-40.0% by weight of a filler, and
• (e)-(1) 0.025-1.0% by weight of an alkali metal salt or an alkaline earth metal salt of barbituric acid and/or 0.025-0.5% by weight of aromatic secondary or tertiary amine, and
• the second paste comprises, on a basis of 50% by weight of the second paste:
• (a)-(2) 5.0-22.5% by weight of a second radical polymerizable monomer,
• (b) 0.05-3.0% by weight of a polymerizable monomer having a phosphonic acid group represented by formula [I]:
• wherein R1 is a hydrogen atom or a methyl group, R2 is an alkylene group of the carbon atom number of 5-10, and R3 is an alkylene group of the carbon atom number 1-6,
• (c) 0.05-3.0% by weight of a polymerizable monomer having a dibasic acid carboxyl group,
• (d)-(2) 27.3-40.0% by weight of a second filler, and
• (e)-(2) 0.3-0.8% by weight of a chemical polymerization initiator and/or a photopolymerization initiator, and wherein both of the pastes are free from water.