Wound healing Can a post surgical heel wound healing outside but not deep?

[ferretguy]

Would an MRI show all software tissue defects? Seems like where the foreign body was (which was deep touching the calcaneous bone) hasn't approximated while the outside is continually calloused and I have to deride it to walk. Upon trimming the callous there is a single dot that was he path of the piece of tile and it is not healed. It lights my *** up when I hit it. Is it possible the wounder after 2 surgeries and 2 years it just hasn't healed? The antalgic gait is a whole other issue and it's absolutely brutal and I don't know how much more I can go on.