Orthopaedic implants are artificial mechanical devices that are mounted to the skeletal system of the human body for various purposes, such as supporting bone(s), replacing bones or joints and reattaching tendons or ligaments. The implant devices are unique in that they are exposed to living cells, tissues and biological fluids, which are not only dynamic but also a hostile environment for the survival of the implant [1]. These surgical implants are usually made of one of three types of materials: austenitic stainless steels, cobalt-chromium alloys or titanium and its alloys [2]. The design of the implant is dictated by the anatomy and physiology of the skeletal structures of the human body [3].
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