Mechanical properties and biological behavior of gel-derived bioglass ceramic

gel-derived bioglass ceramic powders with different composition were fabricated by sol-gel-self propagating method and formed into discs by cool static press and thermal treatment. Microstructure, mechanical properties and biological behavior of samples were investigated. The experiment results show that (Ca,Mg)(3)(PO4)(2) and MgSiO3 are obtained in the glass matrix after being-treated at 1100 degrees C. The size of Crystals in 5S is bigger than in 3S and 5S has better mechanical properties, whose bending strength and fracture toughness can be up to 172 MPa and 2.02 MPa.m(1/2) respectively. Both of them have no inflammatory and had good touch with bone tissue in vivo. A lot of new immature bone and blood vessel appeare in the interface between 5S and bone at 3w. Bone amalgamation occurrs at 6w. There is no obviously interface and a calcium-phosphate transition layer forms between material and bone at 6w. These results demonstrate that 5S is an ideal material for biomedical application.