| abstract |
1. A composition for restoring hard tissue, comprising from 5 to 98.95 parts by weight of monomer (A), from 1 to 75 parts by weight of (meth) acrylate polymer (B), and from 0.05 to 20 parts by weight of a polymerization-initiating composition (C ) containing an organoboron compound (C1), provided that the total amount of components (A), (B) and (C) is 100 parts by weight. 2. The composition for solid tissue repair according to claim 1, wherein the polymer (B) is a polymer mixture that includes polymer particles (b1) having a weight average molecular weight of 30 × 10 to 60 × 10 and a specific surface area of 1.5 to 4.5 (m / g), polymer particles (b2) having a weight average molecular weight of 5 × 10 to 20 × 10 and a specific surface area of 0.51 to 1.2 (m / g), and polymer particles (b3) having a weight average molecular weight weight from 5 × 10 to 20 × 10 and specific surface area from 0.1 to 0.5 (m / g), and contains polymer particles (b1) in an amount from 0 to 98% weight polymer particles (b2) and polymer particles (b3) in a total amount of not less than 2% weight relative to the total weight of polymer particles (b1), (b2) and (b3), provided that the total number of polymer particles (b1) , (b2) and (b3) is 100% by weight. 3. The composition for solid tissue repair according to claim 1, wherein the polymerization initiating composition (C) contains an aprotic solvent (C2) having a boiling point of 30 ° C to 150 ° C, in an amount of 30-80 weight parts per 100 weight parts of an organoboron compound ( c1) .4. The composition for repairing hard tissue according to claim 1, wherein the polymerization initiating composition (C) contains an aprotic solvent (c2 ′) having a boiling point of 50 ° C to 120 ° C, in an amount of 5-40 parts by weight and alcohol (c3), having a boiling point of 60 ° C |