文献类型：期刊文献

英文题名：Effects of magnesium silicate on the mechanical properties, biocompatibility, bioactivity, degradability, and osteogenesis of poly(butylene succinate)-based composite scaffolds for bone repair

作者：Wu, Zhaoying[1];Zheng, Kai[2];Zhang, Jue[1];Tang, Tingting[3];Guo, Han[4];Boccaccini, Aldo R.[2];Wei, Jie[1]

机构：[1]East China Univ Sci & Technol, Minist Educ, Key Lab Ultrafine Mat, Shanghai 200237, Peoples R China;[2]Univ Erlangen Nurnberg, Inst Biomat, Dept Mat Sci & Engn, Cauerstr 6, D-91058 Erlangen, Germany;[3]Shanghai Jiao Tong Univ, Sch Med, Shanghai Peoples Hosp 9, Dept Orthopaed Surg, Shanghai 200011, Peoples R China;[4]Chinese Acad Sci, Shanghai Inst Appl Phys, Shanghai Synchrotron Radiat Facil, Shanghai 201800, Peoples R China

年份：2016

卷号：4

期号：48

起止页码：7974

外文期刊名：JOURNAL OF MATERIALS CHEMISTRY B

收录：;EI(收录号：20165003123479);WOS:【SCI-EXPANDED(收录号:WOS:000391778200021)】；

基金：The grants were from the National key research and development program (2016YFC1102100), the National Natural Science Foundation of China (81271705, 31271031), the Major International Joint Research Project between China and Korea (81461148033), the National Research Foundation of Korea (NRF) Grant (NRF-2014K2A2A7066637), the China Scholarship Council (CSC)-German Academic Exchange Service (DAAD) PPP project and CSC (No. 201206740003).

语种：英文

外文关键词：Bone - Synchrotrons - Silicates - Bioactivity - Butenes - Magnesium compounds - Phosphate minerals - Repair - Scaffolds (biology) - Synchrotron radiation

摘要：Bioactive scaffolds of magnesium silicate (m-MS)/poly(butylene succinate) (PBSu) composites were fabricated by a solvent casting particulate leaching method for bone regeneration. The scaffolds had a hierarchical porous structure with interconnected macropores (300-500 mu m), micropores (1-10 mu m) and mesopores (similar to 5 nm). In addition, the composite scaffolds were degradable in Tris-HCl solution and formed apatite on their surfaces in simulated body fluid, indicating good degradability and bioactivity in vitro. Compared with PBSu scaffolds, the composite scaffolds improved the in vitro attachment, proliferation and osteogenic differentiation of MC3T3-E1 cells, revealing good cytocompatibility. Furthermore, the model of rabbit femur cavity defects was used to evaluate the in vivo osteogenesis of the composite scaffolds. The results of synchrotron radiation-based mCT (SRmCT) imaging, histological analysis and immunohistochemistry showed that the composite scaffolds were gradually degraded and replaced by new bone, and the scaffolds with 40 wt% m-MS (C40) almost completely disappeared after 12 weeks of implantation, indicating that the scaffolds containing m-MS enhanced new bone formation. The results demonstrated that the bioactive m-MS/PBSu composite scaffolds with good biocompatibility, degradability, bioactivity and osteogenesis are promising biomaterials for bone repair.