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  • In vitro degradability, bioactivity and cell responses to mesoporous magnesium silicate for the induction of bone regeneration.

In vitro degradability, bioactivity and cell responses to mesoporous magnesium silicate for the induction of bone regeneration.

Colloids and surfaces. B, Biointerfaces (2014-06-07)
Zhaoying Wu, Tingting Tang, Han Guo, Songchao Tang, Yunfei Niu, Jue Zhang, Wenjing Zhang, Rui Ma, Jiacan Su, Changsheng Liu, Jie Wei
ABSTRACT

Mesoporous magnesium silicate (m-MS) was synthesized, and the in vitro degradability, bioactivity and primary cell responses to m-MS were investigated. The results suggested that the m-MS with mesoporous channels of approximately 5nm possessed the high specific surface area of 451.0m(2)/g and a large specific pore volume of 0.41cm(3)/g compared with magnesium silicate (MS) without mesopores of 75m(2)/g and 0.21cm(3)/g, respectively. The m-MS was able to absorb a large number of water, with water absorption of 74% compared with 26% for MS. The m-MS was also degradable in a Tris-HCl solution, with a weight loss ratio of 40wt% after a 70-day immersion period. The m-MS exhibited good in vitro bioactivity, inducing apatite formation on its surfaces after soaking in simulated body fluid (SBF) at a faster rate than observed for MS. The m-MS surface clearly promoted the proliferation and differentiation of MC3T3-E1 cells, and their normal cell morphology indicated excellent cytocompatibility. This study suggested that mesoporous magnesium silicate with a high specific surface area and pore volume had suitable degradability and good bioactivity and biocompatibility, making it an excellent candidate biomaterial for the induction of bone regeneration.

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