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Porous calcite for bone substitute N

Porous calcite is expected to be useful as an artificial bone substitute that could be fabricated by using calcium hydroxide (Ca(OH)2) as precursor and wax spheres as porogen. Different weight percentages of wax spheres were used to produce calcite structure with various degree of porosity. Sintering at 850 o C under mixed atmosphere CO2/O2 was carried out to eliminate embedded-wax spheres and transform to calcite. X-ray diffraction (XRD) patterns assigned to calcite single phase could be detected from the obtained porous blocks. Porosities of the porous calcite were in the range of 60-70% approximately. Diameter of pores was about 200to 400-μm is accepted for cell activities and bone ingrowth. Porous calcite blocks also showed the suitable mechanical strength for handling properties if it would be applied in the repair of clinical bone defect.