Saiwania wrote:Ifreann wrote:No, we've been able to have metal in people's bodies for, like, millennia.
Like I said, it may be in there after surgery- but if the body ever notices that it doesn't belong there, that it'll just be covered up in macrophages and scar tissue will form at the site. The human body doesn't cooperate with a great many alterations. The best materials to use biologically match the individual somehow, like if it's 3D printed with their DNA. It's why organs aren't just interchangeable between people. It's not as simple as treating the body and it's many complex systems like a Lego set.
An organ that interfaces with the body vs. a relatively simple subdermal implant (or a mechanical substitute/prosthetic) are incredibly different things.
Which is why there's no such thing as a "hip donor" when someone needs a hip replacement.
EDIT: Apparently there is, though I was getting at the fact that inorganic prosthetics are commonplace and less potentially problematic than an organ replacement.