Welcome to Neuro Talk. I know Bryanna to be extremely knowledgable in the dental field. She is 100% correct about that tooth, being the source of the infection. I have asked her serveral times about my own dental issues, and the guidance saved me time, money and extra pain. I did not "retain" my infected teeth, as they were the problem. I didn't vote for a root canal to begin with, and really got some good advice from a oral surgeon who did agree. I wish you all the best. ginnie