Natural bone is a complex composite, mainly constituted of biological apatite and molecules of collagen. The natural composite material should combine the strength and stiffness of an inorganic compound with flexibility, toughness and resorbability of an organic phase. Osteoconductivity and loadbearing capability of a scaffold are controlled by the scaffold architecture (pore size, shape, interconnectivity) and by the biomaterial that is used in the construction. Ca-deficient hydroxyapatite (CaP) has been used as bone substitutes and bone-filling materials, due to excellent biocompatibility, osteoconductivity, bone-bonding properties.