POROUS CRYSTALLIZED GLASS CONTAINING APATITE CRYSTAL AND DIOPSIDE CRYSTAL AND/OR WOLLASTONITE CRYSTAL AND PRODUCTION THEREOF

摘要

PURPOSE:To produce the titled glass useful as an artificial bone, especially as a bone anaplerotic material, by adding a specific amount of fine powder of combustible substance uniformly to glass powder capable of precipitating the titled crystals uniformly by heat-treatment, forming the mixture, and sintering the formed product. CONSTITUTION:Glass powder having particle size of finer than 200 mesh and capable of uniformly precipitating apatite crystal and diopside crystal and/or wollastonite crystal by heat-treatment is mixed uniformly with 40-80vol% particles of a combustible substance (e.g. naphthalene, polyethylene, etc.) having particle diameter of 20-1,000mu. The mixture is formed to a desired form, heated to effect the combustion and removal of the combustible substance and the sintering of the glass powder, and then heat-treated within the temperature range to precipitate apatite crystal and diopside crystal and/or wollastonite crystal from the glass. The glass produced by the above process has high strength and excellent biocompatibility, and is suitable as an artificial material for filling the defective part of bone, etc.