There are several treatment choices to help you. The simplest and most cost effective is to place two dental implants and Locator attachments and retrofit them into your existing denture. That is, if your existing denture generally fits well and you like the look. Depending on where you live, a real implant will run between $1600 and 2100. The attachment, either a Locator or Equator (brand dependent) will be between $600 and 800. Two implants is enough to give you some stability. If you don't like the existing denture, then it will need to be remade, also. Another path is a fixed-detachable, or screw-retained denture. This will run around $25000. This type of prosthesis requires more involved surgery, 4 or more implants, and a final denture that is fabricated over a milled titanium bar. These are a great option, but much more involved. A similar path to the fixed-detachable is a newer concept called a Conus denture. It will probably cost a little less than the screw-retained, maybe $22000. It still requires 4 implants and involves more surgery. But, in the end, it is totally implant supported and won't bother your tissue. It may be taken out at night, just long enough to clean it and then it can be inserted back in by you. It never has to be unscrewed by your dentist and there is much less follow up needed. And, since it is removable it is easier to clean. All are good options. It depends on how much you can spend and how much involvement you want.