Self-Reinforced Bioactive Glass-Bioabsorbable Polymer Composites

Non-reinforced and self-reinforced bioactive-bioabsorbable composite rods were produced by extrusion and solid state die-drawing using P(L/DL)LA matrix and spherical glass particles. The structure and mechanical properties of composites were measured before and after die-drawing. The structure examination of composites by SEM showed the formation of fibrous reinforced structure of the polymer with spindle-shaped pores around the glass spheres during and oriented in the direction of die-drawing. Incorporation of glass into the polymer matrix turns the composite more brittle compared to neat polymer. By die-drawing the brittleness of the composite can be eliminated. Not only the bioactivity and controlled degradation rate of composite but also structure and mechanical properties achieved during die-drawing make the self-reinforced bioactive glass- bioabsorbable polymer composites a novel implant material for temporary support of healing tissues.