Fabrication of Bio-ceramic Bone Model

The process parameters and raw materials of current commercial rapid prototyping(RP) machines are lim-ited,thus the bone model is not easily to fabricate.In order to overcome these disadvantages,a self-developed rapid prototyping machine was used to produce bone model.In this work,the hydroxyapatite(HA),silica sol and suspend-ing agent were mixed as raw materials.By adjusting the suitable process parameter,the bio-ceramic green parts could be formed,and then the specimen green parts were sintered at 1200℃,1300℃,1400℃,respectively.The shrinkage,surface roughness and compression strength were tested.Furthermore,the cell activities of the bone model were inves-tigated through the osteoblast MG63 cells culture.The results showed that the green part sintered at 1200℃ exhibits optimum properties with greatly improved compression strength and surface roughness of Ra(12.04 μm),which is suitable for the growth of the osteoblast MG63.