生物相容性
极限抗拉强度
乙烯醇
壳聚糖
材料科学
抗压强度
自愈水凝胶
骨愈合
生物医学工程
化学
复合材料
聚合物
高分子化学
外科
冶金
医学
生物化学
作者
Shichao Bi,Pengjun Wang,Shihao Hu,Shaoke Li,Jianhui Pang,Zhuochao Zhou,Guangxi Sun,Liang Huang,Xiaojie Cheng,Shichao Xing,Xiguang Chen
标识
DOI:10.1016/j.carbpol.2019.115176
摘要
Weak mechanical properties, lack biocompatibility and relatively bioinert are formidable obstruct in application of bone repair materials. Multifunctional composite materials have been considered as a viable solution to this problem. Here, a new double network (DN) hydrogel was constructed by physical cross-linking of medical grade poly (vinyl alcohol) (PVA) and chitosan in KOH/urea dissolution system. The obtained hydrogel demonstrated excellent tensile strength (0.24 MPa), elongation at break (286%), and high compressive strength (0.11 MPa on the strain of 60%). Our studies showed that the prepared hydrogel had excellent biocompatibility in vitro and the introduction of hydroxyapatite (HAp) by surface mineralization imparted hydrogel the ability to induce rat bone marrow stem cells (rBMSCs) differentiation. The in vivo experiments revealed that the surface mineralized double network hydrogel significantly accelerated simultaneous regeneration of bone defects in a rabbit bone defect model. All the results indicated that this hydrogel has the potential as a bone repair material.
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