Why does your body not attack metal plates and screws after surgeries?

Question

Why does your body not attack metal plates and screws after surgeries?

In: Biology

Answer 1

Through research and experiments and past experiences in science, we’ve discovered materials that the body does not react to. 

We then make surgical implants and instruments out of these materials. 

It’s not “why does the body not attack implants” – it is “we found materials that the body doesn’t attack and therefore we use these materials to make implants”. 

If these materials didn’t exist, then we either won’t be able to make implants or we will make implants that the body does attack. There’s old implants from decades ago that does break down in the body and cause heavy metal poisoning etc. before we made scientific advances that allow us to have safe implants now.