Poly-lactic acid based biocomposite strengthened with magnesium alloy wires (Mg wires/PLA composite) is prepared for bone fixation implantation. The influence of wire content and load mode on the degradation performances of the composite and its components is studied. The result suggests the degradation of Mg wires could slow down the pH decrease originated from the degradation of PLA, while a relatively high wire content contributes to descend the degradation rate of Mg wire in the composite. Dynamic load significantly promotes the mechanical loss of the specimens. After 30 days immersion, the S b retention is about 65%, 52% and 55%, respectively for pure PLA, the composite at 10 vol% and 20 vol% under dynamic load, comparing to 75%, 70% and 72% under no load. Moreover, dynamic load could further mitigate the degradation of Mg wires by increasing convective transport of acidic products out of the composite.

中文翻译：

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镁丝/ PLA复合材料在骨固定植入物中的降解行为研究：丝含量和载荷模式的影响

制备了以镁合金丝（Mg丝/ PLA复合材料）增强的聚乳酸基生物复合材料，用于骨固定植入。研究了线含量和载荷模式对复合材料及其组分降解性能的影响。结果表明，Mg丝的降解可减缓源自PLA降解的pH降低，而相对较高的丝含量有助于降低复合物中Mg丝的降解速率。动载荷显着促进了样品的机械损耗。浸泡30天后，纯PLA的Sb保留率分别约为65％，52％和55％，复合材料在动态载荷下的含量为10vol％和20vol％，相比之下，在动态载荷下分别为75％，70％和72％。空载。而且，