I am a former dental implant patient who is DESPERATELY searching for a replacement piece, as I am having several autoimmune problems, as well as other health problems due the piece that I have currently. My dentist cannot locate this piece and has been searching for months, so I am trying here on my own. This is what he wrote on the paper that he gave to me: Nobel Biocare, 18-year-old Steri_oss implant, 3.25 mm diameter External Hex Attachment. If anyone here can help me, steer me in the right directions, give advice or point out a forum that would reach a wider range of dentists, I would appreciate it more than you can ever know. Thank you.