Key Clinical
Message
Radix entomolaris (RE) characterized by an extra root in mandibular
molars is a rare phenotype. When this condition occurs simultaneously
with complex root canal curvatures or S-shaped canals, root canal
therapy (RCT) challenges arise\RL. The present study presents three
cases of RE + complex root curvatures. The challenges of RCT and case
management of this study are in the framework of paying attention to the
access cavity according to the extra root, instrumentation with the
crown down technique, sufficient irrigation, using nickel-titanium
rotary systems, dense obturation with warm vertical technique and
patient follow-up. Also, in the last case, the management of two broken
files by loop and bypass techniques is described. \RL Adequate
knowledge of the root canal system’s morphology and the use of
appropriate techniques and materials for root canal therapy is the
background for successful RCT.