Characterization Of Physical And Mineralogical Changes Of An Inorganic, Composite Cement During Aging In Vitro

摘要

The increase in mass is due to the uptake of water for continued hydration of calcium aluminates. Initially, this effect is likely diffusion controlled, as the change in mass is linear with time as is typical of diffusion-controlled reactions (Fig. 1). Variations in densities of the calcium aluminate phases present on hydration in OC-cement are believed to play a role in the slight expansion observed. Whether this expansion could be a beneficial characteristic for in vivo applications is not yet known, but may enhance stability. It is clear that OC-cement is a complex system that has not reached equilibrium at these times and the details of conversion reactions require further study. Calcium aluminate cements are stable in saline environments and may be suitable for orthopaedic applications. Previous studies calcium aluminate ceramics in orthopaedic applications have shown favorable tissue response.