We're talking about _root_ _canals_, not dental fillings! Other than the anaesthetic, the materials used in root canals are are entirely different from those used in a dental filling.
Furthermore, root canals require different training and are (usually) done by endodontists. Dentists usually handle the more mundane and more tested procedure of dental fillings.
My point is, root canals are much more invasive and have their own problems(not associated with dental fillings).
Furthermore, root canals require different training and are (usually) done by endodontists. Dentists usually handle the more mundane and more tested procedure of dental fillings.
My point is, root canals are much more invasive and have their own problems(not associated with dental fillings).