Would you date a machine?

[noparlpf]

I have an interesting question. Prostheses these days are becoming able to provide basic neural sensory input. What if, in a few years, we can actually replace damaged parts of the brain with more advanced digital prostheses? Does that individual cease to be human or a person because part of their brain is made of metal? What if it's only a small section of the motor cortex? What if it's the entire frontal lobe? Why or why not?

Edit: And if replacing part of the brain with inorganic parts with perfectly equivalent functionality removes an individual's humanity or personhood, does replacing part of a limb with inorganic parts with equivalent functionality remove an individual's humanity or personhood? Why or why not?