期刊
MATERIALS TECHNOLOGY
卷 27, 期 1, 页码 49-51出版社
MANEY PUBLISHING
DOI: 10.1179/175355511X13240279339482
关键词
Biodegradable Mg-Zr-Ca alloy; Cytotoxicity; Corrosion and mechanical properties
资金
- Australia-India Strategic Research Fund (AISRF) [BF030031]
Mg-Zr-Ca alloys were developed for new biodegradable bone implant materials. The microstructure and mechanical property of the Mg-xZr-yCa [x=0.5, 1.0% and y=1.0, 2.0% (wt-% hereafter)] alloys were characterised by optical microscopy, compressive and hardness tests. The in vitro cytotoxicity of the alloys was assessed using osteoblast-like SaOS(2) cells. The corrosion behaviour of these alloys was evaluated by soaking the alloys in simulated body fluid (SBF) and modified minimum essential medium (MMEM). Results indicated that the mechanical properties of the Mg-Zr-Ca are in the range of the mechanical properties of natural bone. The corrosion rate and biocompatibility decreases with the increase in the Ca content in the Mg-Zr-Ca alloys. The solutions of SBF and MMEM with the immersion of the Mg-Zr-Ca alloys show strong alkalisation. The Zr addition to the Mg-Zr-Ca alloys leads to an increase in the corrosion resistance, compressive strength and the ductility of the alloys, and a decrease in the elastic modulus of the Mg-Zr-Ca alloys.
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