Abstract
Achieving success in endodontic treatment necessitates proper identification of the canals, thorough chemomechanical preparation, and three-dimensional obturation with an airtight seal. However, treatment failure can occur due to unpredictable tooth morphology. Although mandibular molars typically possess two roots containing three canals, the number of roots and canals may vary in certain teeth. These variations include the presence of an additional root, known as radix entomolaris (RE) if located distolingually, or radix paramolaris (RP) if located mesiobuccally. In this case series, we present six cases of mandibular first, second, and third molars with rare microstructures; one with RE and the other with RP respectively, both of which required endodontic treatment to achieve successful outcomes. Key Words: Additional third root; Anatomical variations; Endodontic treatment; Mandibular molar; Radix entomolaris; Radix paramolaris
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