Hi Allan: Yes, I am experiencing many new cavities after what I would call a dry spell. In the last 3 months I have 4 new cavities, 1 cracked filling, 2 crown popped off and need more cleanings. I was told that is possibly the PD (Oh, your to young) but that since the dry mouth, there is a saliva substitute on the market or sugar free hard candy to keep the teeth bathed in saliva. Hope this helps and I am taking donations for my dental problems. I still have some teeth left alone. I'm saving for all new crowns. So, keep those cards and letters coming in. I need these as I would have nothing to grind at night. How to people with dentures grind their gums? Does it hurt? Can you hear it? (I like to grind and drive my hubby crazy - he should share in some of the benefits) TTFN Gina Take what you want and leave the rest.