Wow hg -- Thank you for your detailed comments! My teeth have returned to normal. It was actually the metal fillings that were the problem. I rinsed with baking soda and I also supplemented with "Sea Silver" it's that liquid supplement advertised on the radio. I took the Sea Silver for awhile last year. I was tired of taking a bunch a supplemental "pills". A side benefit was that my jaw quit popping. The jaw thing had been going on for years and it went away with the Sea Silver. In fact my dentist told me at one of my dental visits that the popping sound made him sick. It was very loud and obvious and embarrassing. I told my dentist that it was a good thing that I had good self esteem or his comment would have made me feel bad. He said that what he meant was that he felt bad for me! Anyway I quit taking it for awhile because a competitor vitamin company claimed that there were too many metals in Sea Silver. I didn't know if that was true. I did have a spare bottle though so I used it with my sensitive fillings. Don't know if it was the baking soda, Sea Silver or just the passing of time that helped. Once again, Thank you for your comments - utgirl