ADHESIVE COMPOSITION FOR DENTAL USE

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Disclosed is an adhesive composition for dental use, which comprises a polymerizable monomer component (A) comprising a phosphoric acid-type polymerizable monomer having an acidic group derived from phosphoric acid and a multivalent metal ion-releasing component (B) and shows an acidic nature, wherein the multivalent metal ion-releasing component (B) can release at least an earth metal ion, and wherein an earth metal ion derived from the component (B) is present in the composition together with the phosphoric acid-type polymerizable monomer in such an amount that a ratio of total valency number (RE) as defined by the formula (1) is 0.2 to 3.0. RE = TVE/TVA (1) [wherein TVE represents the total number of valencies of the earth metal ions contained in the composition; and TVA represents the total number of valencies of the acidic group in the phosphoric acid-type polymerizable monomer contained in the composition.] The adhesive composition can adhere and fix a composite resin or prosthesis to a tooth structure more tightly and stably over a prolonged period.