Today, doctors and surgeons can repair the human body with artificial parts made up of different materials and electronic and mechanical components. The repaired body becomes a living/artificial, biological/technological hybrid. Prostheses and implants result from a long search for optimised biocompatibility, biodurability and biofunctionality. The ideal prosthesis must be so perfectly integrated that it passes unnoticed. It must be durable and hard-wearing and operate in perfect symbiosis with living tissue to ensure the complete integrity of the repaired body. For instance, when finger joints are damaged by osteoarthritis or rheumatism, they can be replaced with an articular implant made of titanium and pyrocarbon...

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