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Title:: Research Progress on Preparation and Surface Activation of Porous Biomedical Metal Materials

Author(s):: LIU Hui; HAN Yong; （State Key Laboratory for Mechanical Behavior of Materials, Xian Jiaotong University, Xian 710049, China)

Abstract:: Biomedical porous metal materials, especially the porous titanium and titanium alloys, can provide the mechanical properties similar to human bone and promote growth of bone tissue into pores of the materials to enhance the fixation between their implants and bone at early periods of implantation, exhibiting a great potential for the application of human hard tissue repair and replacement. This paper focuses on the preparation methods and research progress of porous titanium and titanium alloys and their surface bioactivation technologies which are suitable for the complex pore structure. Nowadays, the main methods suitable for preparing porous titanium and titanium alloys include powder metallurgy (PM), titanium fibers sintering, selfpropagating hightemperature synthesis (SHS), selective electron beam melting (SEBM) and selective laser melting (SLM). Surface bio activation technologies suitable for porous titanium and titanium alloys, including solgel processing, bionic solution, electrochemical deposition, and micro arc oxidation, are also reviewed. As biomedical materials, both mechanical compatibility and surface bioactivity of porous titanium and titanium alloys must be achieved to meet clinical criteria.