I had a chin implant in 1980. I have noticed it has shifted and I have some pain in the area. Now I am going through a jaw bone necrosis condition that seems to be mystery to all doctors and dentists that have seen me. I am wondering if there could be any connection between the two.Could jaw bone necrosis be caused from a chin implant done 30 years ago? Does an implant need to replaced after a certain amount of time or even checked?