BIOACT1VE GLASS-CERAMICS MATERIALS FOR BONE SUBSTITUTES

摘要

Bioactive glass-ceramic powders belonging to the following system SiO_2-Na_2O-CaO-MgO were prepared via sol-gel. These powders were compacted by cold uniaxial pressing and then sintered at low temperatures in order to obtain a porous consolidated system. The biomaterials were then soaked in a simulated body fluid (SBF) to study their bioactivity. Both the as obtained samples and the soaked ones, were characterized by means of X-ray diffraction and optical and scanning electron microscopy with energy dispersive spectroscopy (EDS). In this paper , we present some preliminary results on these glass-ceramics that we believe might be successfully proposed as scaffold for bone substitutes. Future developments will involve the addition to the glass-ceramic powders of a second organic phases thermally degradable in order to obtain a macroporous structure.