Abstract
Porous magnesium-doped biphasic calcium phosphate (Mg-BCP) scaffolds were prepared through polymeric sponge method by employing sol-gel derived Mg-BCP powders of 5 and 10 mol% Mg concentrations doped. Magnesium-free porous biphasic calcium phosphate (BCP) was also prepared as the reference. Morphological analysis showed that the doping of magnesium caused accelerated crystal growth of BCP particles leading to more progressive particle fusion and densification. All porous samples showed good pore interconnectivity with the macropores of 100–1,000 µ m in average size. Magnesium free porous BCP has 0.39 MPa compressive strength, and it increased with the doped Mg level to 2.17 MPa at 10 mol% Mg doping. This was attributed to the increased density from 1.98 g/cm3 (Mg free porous BCP) to 2.19 g/cm3 (10 mol% porous Mg-BCP) thus reflecting denser porous structure as the consequence of more progressive densification. It can be concluded that magnesium acted as the sintering additive of the fabricated porous calcium phosphates leading to improved mechanical properties.
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