Hi Whitey,
As Al mentioned, there was a post about someone having a metalic taste in their mouth, and that it might be from a medication but my memory is no better than Al's.
I have problems with my teeth because of my jaws, tongue and mouth muscles being affected by ALS, I grind my teeth and clench my teeth together, so they are sometimes sore. I also broke a filling and part of a tooth off by grinding. Had to have it repaired. It seems strange, when everything is getting weak, that my jaws are strong enogh to do this. You did say that your teeth were sore, could it be something like this? Are your tongue and mouth muscles affected by ALS?