I am a 59 year old retired woman and I had all my teeth pulled in July 2011, have gone through 3 dentists to get a set that fit correctly. Just got my set from 3rd dentist and it appears these are going to be the best to date. Still have to use adhesive on both upper and lower which I detest. To those of you who asked about the thermoplastic adhesive, Cushion Grip, I have tried it after ordering from Amazon. Is not sold in stores. I applied it as instructed and the fit was really great BUT....the stinging/burning on my gums was intolerable. It's almost like having a reline done but one you can do simply yourself. If you can get past the stinging issue, it's worth a shot. Just remember to warm the tube in a glass of very warm water to make it pliable.
I have used the powders (Polident, Rigident and Fixodent) and they are okay. If you really have loose fitting dentures, they won't hold as well because the denture material is not fitting up next to your natural gums and the powder does not fill in the gaps. This is the easiest to remove though from your gums and dentures.
HATE, HATE, HATE Polident and Fixodent cream adhesives!!! They are the WORST to remove from your mouth and dentures. I did not find they held for very long either.
The best cream adhesive I have found so far is one called Secure. I find it easier to remove than the others, not easy, just easier. I soak my dentures overnight and then use a denture brush to clean out any residue left on them.
I still have issues with eating anything with any texture so I am relegated to eating toast, pasta, jello, etc. I'm hoping that the new product will allow me to eat and enjoy some real food!!!