The knowledge of root canal anatomy and its variations may contribute to endodontic treatment success. It is known that the mandibular first molar may have different anatomical variations. A Radix Entomolaris (RE) with two distal roots is an interesting example of such anatomic diversity. The presence of an additional root or canal can lead to difficulties during endodontic treatment. Identifying all the canals, cleaning, shaping and obturating the canals three dimensionally defines the success

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... of the endodontic therapy. The present article is about the endodontic management of two cases of mandibular first molar with different anatomic variations, one with an extra RE root and an extra distal canal while another with an extra RE root and canal using the magnification aid.