My dentist told me to wait until these 2 teeth hurt, then have a root canal. Those bottom teeth are so small, I wonder how they could even do a root canal. All of my resorptions are also on my lower jaw. I have read that Strontium is put in replacement teeth and bone implants. My DEXA was great when I was on Strontium last year, but I knew it wasn't accurate. After I quit Strontium, another DEXA was worse. Then I had a REMS test which was worse, but I think more accurate. My dentist said he had never heard of Strontium.