The mercury filling can be stimulated with just a little rubbing, heat etc. So Its possible that the Magnetic Pulser could also stimulate them.
I have used the Magnetic pulser on my root canal just to kill any pathogens that could possibly be harboring there. Couldn't tell though as my root canal doesn't bother me.
One of my friends had a sore tooth and was scheduled to have work done on it by the dentist. After he pulsed it 50 times with the magnetic pulser the pain went away and the problem was gone. He ended up just having his teeth cleansed instead.