The first week following my upper extractions all my mouth did was make spit. Now I can't make hardly any at all! A full upper denture covers critical salivary glands on the roof of the mouth, right near where the teeth would be. If you're wondering about the slimy goop between the denture plate and the palate that would be saliva. Even worse if you're also using adhesive. I will be buying stocks in Biotene oral moisturizer. I really wish it was flavourless though. I'm going to ask them if they can make it taste like beer or wine. Then at least it would help offset the discomfort.