title: Development of magnesium calcium phosphate biocement for bone regeneration.
abstract: Magnesium calcium phosphate biocement (MCPB) with rapid-setting characteristics was fabricated by using the mixed powders of magnesium oxide (MgO) and calcium dihydrogen phosphate (Ca(H(2)PO(4))(2).H(2)O). The results revealed that the MCPB hardened after mixing the powders with water for about 7 min, and the compressive strength reached 43 MPa after setting for 1 h, indicating that the MCPB had a short setting time and high initial mechanical strength. After the acid-base reaction of MCPB containing MgO and Ca(H(2)PO(4))(2).H(2)O in a molar ratio of 2 : 1, the final hydrated products were Mg(3)(PO(4))(2) and Ca(3)(PO(4))(2). The MCPB was degradable in Tris-HCl solution and the degradation ratio was obviously higher than calcium phosphate biocement (CPB) because of its fast dissolution. The attachment and proliferation of the MG(63) cells on the MCPB were significantly enhanced in comparison with CPB, and the alkaline phosphatase activity of MG(63) cells on the MCPB was significantly higher than on the CPB at 7 and 14 days. The MG(63) cells with normal phenotype spread well on the MCPB surfaces, and were attached in close proximity to the substrate, as seen by scanning electron microscopy (SEM). The results demonstrated that the MCPB had a good ability to support cell attachment, proliferation and differentiation, and exhibited good cytocompatibility.
authors.affiliation: Key Laboratory for Ultrafine Materials of Ministry of Education, and Engineering Research Center for Biomedical Materials of Ministry of Education, East China University of Science and Technology, Shanghai 200237, People's Republic of China.
authors.forename: Junfeng
authors.initials: J
authors.lastname: Jia
authors.forename: Huanjun
authors.initials: H
authors.lastname: Zhou
authors.forename: Jie
authors.initials: J
authors.lastname: Wei
authors.forename: Xin
authors.initials: X
authors.lastname: Jiang
authors.forename: Hong
authors.initials: H
authors.lastname: Hua
authors.forename: Fangping
authors.initials: F
authors.lastname: Chen
authors.forename: Shicheng
authors.initials: S
authors.lastname: Wei
authors.forename: Jung-Woog
authors.initials: JW
authors.lastname: Shin
authors.forename: Changsheng
authors.initials: C
authors.lastname: Liu
mesh_terms: D001861:Bone Regeneration / Q000502:physiology*; D002118:Calcium / Q000737:chemistry*; D002130:Calcium Phosphates / Q000737:chemistry*; D002136:Calcium, Dietary; D019245:Compressive Strength; D006801:Humans; D008274:Magnesium; D017616:Magnesium Compounds; D008855:Microscopy, Electron, Scanning; D010710:Phosphates / Q000737:chemistry*
chemical_list: D002130:Calcium Phosphates; D002136:Calcium, Dietary; D017616:Magnesium Compounds; D010710:Phosphates; C015335:calcium magnesium phosphate; C030781:magnesium phosphate; C020243:calcium phosphate; D008274:Magnesium; D002118:Calcium