I have had a "salty" taste in my mouth that nothing seems to get rid of. Recently, I had a really bad (putrid) taste that my dentist attributed to a bridge that was loose. My dentist removed and recemented the bridge, which seemed to eliminate the really bad taste, but not the "salty" taste. It seems to be coming from the same tooth that had the bad taste. My dentist declares that it cannot be from this tooth, that the cement has sealed the tooth off. He also could not find any signs of decay. He suggested that I might be dehydrated, which would cause my saliva to be more salty, so I am drinking water all day. So far, this had not helped. To me, it feels like something is coming from the tooth which makes me salivate more. What could be causing this?