- Cobalt-chrome
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Cobalt-chrome (Co-Cr) is a metal alloy of cobalt and chromium. Cobalt-chrome has a very high specific strength and is commonly used in gas turbines, dental implants, and orthopaedic implants.[1]
The specific chemical composition used in orthopedic implants is defined in copyrighted specifications ASTM-F75. The principal metals are cobalt, chrome, and molybdenum, with the remainder consisting of trace metals, including nickel, iron and carbon.[1] The two Co-Cr alloys widely used as implant materials are cobalt-chromium-molybdenum (Co-Cr-Mo), and cobalt-nickel-chromium-molybdenum(Co-Ni-Cr-Mo).[2] The possible toxicity of released Ni ions from Co-Ni-Cr alloys and also their limited frictional properties are a matter of concern in using these alloys as articulating components. Thus, Co-Cr-Mo is usually the dominant alloy for total joint arthroplasty.[2]
References
- ^ a b ARCAM ASTM F75 CoCr Alloy
- ^ a b Biomimetic Porous Titanium Scaffolds for Orthopedic and Dental Applications, Alireza Nouri, Peter D. Hodgson and Cui’e Wen (Institute for Technology Research and Innovation, Deakin University, Australia)
Categories:- Cobalt alloys
- Chromium alloys
- Alloy stubs
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