J. Mater. Sci. Technol. ›› 2019, Vol. 35 ›› Issue (4): 535-544.DOI: 10.1016/j.jmst.2018.10.008

• Orginal Article • Previous Articles     Next Articles

Recent advances in biodegradation controls over Mg alloys for bone fracture management: A review

Ming-Shi Songab, Rong-Chang Zengc1, Yun-Fei Dingd, Rachel W. Lie, Mark Eastona, Ivan Colea, Nick Birbilisb, Xiao-Bo Chenab*()   

  1. a School of Engineering, RMIT University, Carlton, 3053, VIC, Australia
    b Department of Materials Science and Engineering, Monash University, Clayton, 3800, VIC, Australia
    c College of Materials Science and Engineering, Shandong University of Science and Technology, Qingdao, 266590, China
    d School of Mechanical Engineering, Huaihai Institute of Technology, Lianyungang, 222005, China
    e The Medical School, The Australian National University, Acton, 0200, ACT, Australia
  • Received:2018-05-07 Revised:2018-09-21 Accepted:2018-10-03 Online:2019-04-05 Published:2019-01-28
  • Contact: Chen Xiao-Bo

Abstract:

Magnesium (Mg) alloys possess comparable physical and mechanical properties to bone, making them an outstanding candidate of implant materials for bone fracture treatment. In addition to the excellent biocompatibility, and bioactivity, the engagement of Mg alloys is key for a number of biological functionalities in the human body. The unique biodegradation nature of Mg alloy implants implies that it may not require a secondary removal procedure when the expected supporting tasks accomplish, as they may simply and safely “disappear” over time. Nonetheless, the demonstrated drawback of potentially rapid degradation, is an issue that must be addressed appropriately for Mg implants and is consequently given unique attention in this review article. Herein, the critical criteria and the state-of-the-art strategies for controlling the degradation process of Mg alloys are reported. Furthermore, future developments of biodegradable Mg and its alloys systems with satisfactory specifications for clinical trials and deployment, are discussed. This review aims to provide information to materials scientists and clinical practitioners in the context of developing practical biodegradable Mg alloys.

Key words: Magnesium alloys, Biodegradation, Corrosion mechanisms, Cytocompatibility