Has anyone been fitted for an upper removable overdenture, over their implants? If so, how many implants do you have and what type of overdenture did you get? How much did it cost? I have 6 implants in my upper front gums. My periodontist suggests I try an overdenture, called a spark erosion prosthetic. Research it on-line. It's very stable and very expensive. There are other types of overdentures, which snap or lock into place, with or without bars. Any info. would be helpful. Thanks.