Acta Biomater:ZrO2-纳米膜包覆的Zn-Li合金可实现可控生物降解并增强骨整合

2020-02-15 不详 网络

锌及其合金由于人体中Zn2 +离子的重要生理功能已成为可生物降解金属(BMs)的新研究方向。然而,在体外研究过程中低的抑制浓度阈值导致Zn2 +离子引起细胞毒性和体内延迟的骨整合是批量锌基BM的两个主要缺陷。为了解决这些问题,我们通过原子层沉积(ALD)在Zn-0.1(wt。%)Li合金的表面上构造了ZrO2纳米膜的阻挡层。由于涂层组合物和Zn-0.1Li合金基材之间的电偶耦合,观察到Zn2 +离

锌及其合金由于人体中Zn2 +离子的重要生理功能已成为可生物降解金属(BMs)的新研究方向。然而,在体外研究过程中低的抑制浓度阈值导致Zn2 +离子引起细胞毒性和体内延迟的骨整合是批量锌基BM的两个主要缺陷。

为了解决这些问题,我们通过原子层沉积(ALD)在Zn-0.1(wt。%)Li合金的表面上构造了ZrO2纳米膜的阻挡层。由于涂层组合物和Zn-0.1Li合金基材之间的电偶耦合,观察到Zn2 +离子的释放减少,而Li +离子的释放加快。细胞相容性分析表明,ZrO2纳米膜包覆的Zn-0.1Li合金具有改善的细胞粘附性和生存能力。组织学分析还表明,ZrO2纳米膜涂覆的Zn-0.1Li合金在体内的骨整合更好。

因此,本研究阐明了基于Zn的BMs上ZrO2纳米膜的ALD可以有效促进骨整合并控制其生物降解行为。

原始出处:

Yuan W, Xia D, et al., Controllable biodegradation and enhanced osseointegration of ZrO2-nanofilm coated Zn-Li alloy: In vitro and in vivo studies. Acta Biomater. 2020 Jan 20. pii: S1742-7061(20)30036-2. doi: 10.1016/j.actbio.2020.01.022. 

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    2020-08-06 sunylz
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    2021-01-21 windight
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    2020-02-17 楚秀娟
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