Hmm, I have an infection/cyst in one of mine. I didn't want to have it pulled. But that looks like what they might do, the oral surgeon said he could make an incision and clean it out, w/out pulling it, 50/50 chance that would word. Haven't been to an endodontist yet. THe infection has caused my gum line to receed, and it the infection in in the tooth next to it now, so I need to do something soon. Maybe I'll search for this therapy. Oh, I had another root canal, and it didn't work, it actually sweeled up, and my dentist used calcium oxide. This is one of my 2 front teeth, so I don't want to lose it. I want it capped.