This fundamental operating principl

This fundamental operating principle could explain why there was no statistically significant difference between their ability to determine the apical constriction in roots with vital pulps versus those with necrotic pulps (Dunlap et al. 1998) and/or various irrigants (Jenkins et al. 2001). Dunlap et al. (1998) reported that there was no statistical difference between the ability of the Root ZX
to determine the apical constriction in vital canals versus necrotic canals.