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Clinical and retrieval evidence for corrosion of spine implants
All prosthetic implants are subject to some degree of wear and corrosion in the body. Wear is a mechanical process resulting from changes in load distribution and micro-motion, while corrosion is an electrochemical process of metal degradation. Certain types of corrosion, such as fretting, occur when chemical and mechanical factors, including crevice and abrasive wear, act on the implant.
Both wear and corrosion result in debris release from the implants into the surrounding tissues and subsequently into the human circulation, and can manifest with local and systemic reactions which, over time, may demand revision of components.
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