I have 3 and will need redoing soon. I am worried though, my T did not start because of dental work but rather ear syringing in the right ear. So is there a chance root canals can cause T. If so millions of people have root canals how come they don't get T? its why I'm worried and maybe its because of my root canals but I didnt have T befor ethis impacted ear wax and then the removal. I hear ringing all around. Also no metal fillings I redid those a long time ago. And also one more questions, is it possible for T to spread to the other ear?