Three Dentist told me that my tooth, upper frontal one, is dead and I need root canal. I am so depressed about this since I need my tooth because it is frontal one. I has an abscess few weeks ago on top of my diseased one, on the gum. But, now the is no trace of it. And my tooth failed with the Dentists' electronic test, and cold test. Do you think it is really dead? Do you think I can cure it with what you have tried ... Pulser, black paste, ,etc.? Please respond ASAP.