actually some root canals were filled with mercury. but, if you are talking about a filling, there can still be mercury in a tooth that has a root canal. but typically they crown teeth with root canals because they get brittle the tooth dies and that is what makes it brittle. so, when they do a crown, often they grind off the mercury and leave a stub for a crown. but, sometimes they leave some mercury if the filling is deep.
you cannot get rid of tattoos by swallowing clay. in fact it can make you sick. you should not take chelators before you have all the poisons out. yes, the tattoos cause mercury poisoning; they have to be cut out. i recommend you go to a biologic dentist to have it done. if you need a list of sites to find one, email me.