| abstract |
Sol-gel processing techniques are used to produce alkali-free bioactive glass compositions based on SiO2, CaO and P2O5. By varying the SiO2 content, a range of hydroxyapatite production rates can be obtained; conversely, varying the time of exposure to actual or simulated in vivo solutions permits use of a range of allowable proportions of SiO2. The sol-gel derived compositions can be chosen to achieve target values for thermal expansion coefficient, elastic modulus and volume electrical resistivity. |