Abstract
Using the model reaction of cumene oxidation the radical-forming ability of wear particles of some orthopaedic alloys and corundum ceramics were studied. It was revealed that wear particles from different alloys catalyzed cumene oxidation whereas particles of corundum ceramics were inert. Cobalt alloy wear particles were much more active as compared with the titanium alloy and stainless steel particles. Production of cobalt alloy by laser sintering reduced the radical-forming ability of its wear particles. Activity of cobalt wear particles was preserved for a long time after their formation and could considerably strengthen the development of oxidizing stress at joint arthroplasty. Detection of catalytic activity of orthopaedic alloys' wear particles requires studying of the influence of free radicals generated by tribochemical reaction upon implant components and biological tissues.
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