| 摘要 |
PROBLEM TO BE SOLVED: To provide an in vivo decomposable and absorbable cell structure useful as a bio-material, having hardness and strength, and capable of keeping the strength in vivo for several months, ensuring high safety in vivo, and allowing easy manufacture with the solution precipitation method(SPT). SOLUTION: A polylactic acid, a copolymer of lactic acid and glycollic acid, or a copolymer of lactic acid and caprolactone is dissolved in a mixed solvent formed out of a solvent capable of dissolving the polymer and a nonsolvent having a higher boiling point than the solvent, and the mixed solvent is vaporized and dissipated from the polymer solution at a temperature lower than the boiling point of the solvent, thereby precipitating the polymer and forming a cell structure having continuous pores. In this cell structure, the polymer has a weight average molecular weight equal to or above 600,000. |
