Cochlear implants, dialysis machines and pacemakers all step in when an organ fails — but they don't cure the tissue, they work around it. Some restore the original pathway, others replace it entirely from outside the body. Pick an organ system and drag the slider to see how much function the technology recovers.
A function-restored device rebuilds part of the body's own pathway. A cochlear implant, for example, skips the damaged hair cells of the inner ear but still feeds electrical signals into the intact auditory nerve — so the brain does the actual hearing. A pacemaker works the same way, nudging the heart's own electrical conducting system back into rhythm rather than pumping the blood itself. In these cases the organ is still partly doing its job; the technology just supplies the missing step.
Assistive tech either restores a pathway using healthy tissue or replaces the organ entirely — dialysis does the kidney's job externally, so it saves lives but demands constant machine time.