Abstract
In recent years, the magnesium phosphate cements showed impressive advantages for their setting property, mechanical strength, and resorption rate in laboratory investigation. While it remained a big challenge to develop the magnesium phosphate cements with ideal self-setting properties, sufficient mechanical strength, excellent biocompatibility, and osteoinductivity for clinical application. In our work, we prepared the magnesium calcium phosphate cement (MCPC) using the MgO, KH2P2O4, and Ca(H2PO4)2 particles with the citric acid added. The citric acid was adopted to modify the setting time and compressive strength of the MCPC, which were investigated by the X-ray diffractometer and scanning electron microscopy. The cytocompatibility and osteoinductivity of the modified cements were evaluated by the MC3T3-E1 cells proliferation and morphology, alkaline phosphatase assay, alizarin red staining and western blot assay. The results demonstrated that the citric acid modified MCPC was featured of satisfactory setting time, ideal mechanical strength, good cytocompatibility and osteoinductivity, indicating its potential application for bone regeneration.
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