The ultimate goal of root canal treatment is a thorough cleaning and shaping of all pulp spaces and the complete obturation of these spaces with an
inert filling material.1 Therefore, the knowledge of root canal anatomy of each tooth is crucial in order to reach this goal.2
Calgary researcher Murray Vimy reported that mercury from the fillings traveled throughout the sheeps' bodies, and in pregnant sheep into the fetuses; moreover, he said, within two months all the sheep experienced a loss of kidney function 16% to 80%), whereas animals that had been given chemically
inert fillings showed no change in kidney function.