I have had 6 implants placed in my upper gums. My periodontist has suggested that I use the spark erosion overdenture. I know there are differnet kinds of overdentures, another one being the slant lock overdenture. What overdentures have you used or will you use? What is your cost? I have been quoted a price of about $14,500 for my overdenture, by a general dentist, as well as a dentist, specializing in cosmetic dentistry, and a prosthodontist. The quotes only vary slightly. Expensive!!! My implants cost $8000. Ugh! Any info. would be helpful. Thanks.