These case reports highlight the complexity of maxillary molar morphologic variation and represent successful endodontic treatment of maxillary molars with single canal, with two palatal canals, and additional mesial canal, which is rarely discussed in literature. The clinician must be familiar with the morphology of the roots of all teeth and the associated intricate root canal anatomy in order to achieve proper access to the canals, effective debridement, and obturation for successful endodontic treatment.
Keywords: Maxillary first molar, Extra canals, Endodontic treatment.