Patent ID: 8513327

Claim:
An adhesive composition for dental use exhibiting acidic property, which includes a mixture of a polymerizable monomer component (A) containing an acid group containing polymerizable monomer, which has a group represented by >P(═O)OH as the acid group, a multivalent metal ion-releasing component (B), water (C) and fumed silica (D); wherein said multivalent metal ion-releasing component (B) is capable of releasing at least earth metal ions; earth metal ions stemming from said component (B) are present together with the acid group containing polymerizable monomer in such an amount that a total valency ratio (R E ) defined by the following formula (1) is in a range of 0.2 to 3.0 in said composition; R E =TV E /TV A (1) wherein TV E is a total valency of the earth metal ions contained in said composition, and TV A is a total valency of the acid groups of the acid group containing polymerizable monomer contained in said composition; said polymerizable monomer component (A) contains not less than 5 mass % of the acid group containing polymerizable monomer, said water (C) is contained in an amount of 3 to 150 mass parts per 100 mass parts of the polymerizable monomer component (A), and said fumed silica (D) is contained in an amount of 0.5 to 20 mass parts per 100 mass parts of the polymerizable monomer component (A), wherein the composition comprises the components (A)-(D) contained in one package.