The ozone I did in my ears and on my tooth, I read through old posts on the ozone forum. I have read that other dentists can give an injection, if I remember right.
As far as the infection it was a tooth with an old root canal. A year later I had them replace the mercury and the crown since that had nickel in it. The dentist preferred to pull the tooth, but it would have cost a few thousand $ because then you need a bridge.