I also have a problem wearing my new dentures...just the lower ones (the upper plate is fine). The lower dentures cause very painful sores and rinsing with salt water, using numbing gels, and even adjustments by the dental techs hasn't helped. My dentist has mentioned "mini-implants" where he puts 4 metal posts in my lower gum then retrofits my lower dentures to "snap" on and off. I really don't see how that would help the irritation caused by the dentures. I would like to know more about the all-on-4 option including the cost, the procedure in general, and what dentists will provide this service.