BONE TREATING IMPLEMENT AND ITS PRODUCTION

摘要

PURPOSE:To provide the bone treating implement consisting of a biodecomposable polymer which has the initial strength equiv. to stainless steel or ceramic implement for joining bones, maintains the strength required for the treatment during the period necessary for the treatment and is thereafter rapidly degraded in strength and absorbed in a living body and the production thereof. CONSTITUTION:This bone treating implement is a high-density molding oriented with the molecules of the biodecomposable polymer in the major axis direction, has >=1.260g/cm<3> density measured by a float-and-sink method and maintains the bending strength and bending strength holdability expressed by equations (1) and (2). A>=B>=23 (kgf/mm<2>)...(1). B/A>=0.85...(2), where A is the initial bending strength of this bone treating implement and B is the bending strength after immersion measured after the bone treating implement is immersed for 90 days in a phosphoric acid buffer soln. kept at 37 deg.C.