It has been observed that symptoms related to toxicity may be exacerbated with the disturbance of mercury amalgam.  Galvanic testing involves a comfortable process where a potentiometer measures the galvanic current generated by dissimilar metals in each metal restoration.  The results of the testing determines the sequence of removal according to corners - or quadrants - of your dentition beginning with the largest battery first.  The testing is accomplished before mercury removal is scheduled.  This service is offered as a courtesy and is particularly important for those with considerable health compromises.