Keywords
Abstract
Currently, the most studied materials of porous resorbable ceramics in the field of bone tissue regeneration and as scaffolds in tissue engineering are calcium orthophosphate Ca3(PO4)2 and hydroxyapatite Ca10(PO4)5(OH)2. In this work, ceramic foams were produced from calcium phosphate by gel-casting of foams method using agarose as a gelling agent. Foaming was carried out at 60oC, followed by the transformation of the foams from the liquid state to the gelled state by cooling them to 15oC. After the sintering process (T= 1100oC, t=2h), the basic physical properties of the foam were determined and morphological observations were made using scanning electron microscopy. The foam exhibited a hierarchical pore structure, i.e., spherical macropores with diameters ranging from 250 to 800 µm, interconnections between macropores (so-called “windows”) with diameters in the rage of 30 - 350 µm, and micropores in the ceramic skeleton with diameters ranging from less than 1 to about 3 µm. . This structure allows good conditions for bone tissue to grow into the implant.
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