| 摘要 |
<p>A biodegradable and resorbable molded article for surgery is disclosed, comprising a polylactic acid molded and stretched article having a viscosity average molecular weight of from 200,000 to 500,000, a bending strength in compression of from 16.0 x 10<2> to 25.0 x 10<2> kg/cm<2>, a bending modulus in compression of from 5.5 x 10<2> to 24.0 x 10<2> kg/mm<2>, and a degree of crystallinity of from 10 to 60% as calculated from density, the thickest portion of said molded and stretched article being controlled between 1.0 mm and 4.5 mm so that said article is deteriorated in strength due to degradation in a living body within about 4 to 16 weeks and resorbed into a living body at least 50% during from about 1.5 to 2.0 years. The molded article has controlled strength, shape, size, and rate of degradation or deterioration according to the site of implantation so that it may retain or fix its strength while osteogenesis in a damaged or fractured bone gradually proceeds to restore strength to a level substantially sufficing for daily living and that it may be biodegraded and resorbed into a living body by the time osteogenesis is substantially accomplished. <IMAGE></p> |
