Mandibular molars can have an additional root located lingually (the radix entomolaris). If present, an awareness and understanding of this unusual root and its root canal morphologycan contribute to the successful outcome of root canal treatment. This report discusses endodontic treatment of two mandibular molars with a radix entomolaris, which is rare macrostructures in the Caucasian population. The prevalence, the external morphological variations and internal anatomy of the radix entomolaris are described. Avoiding procedural errors during endodontic therapy demand an adapted clinical approach to diagnosis and root canal treatment.
Radix entomolaris, Endodontics, Mandibular molar, Paramolaris