Vol. 6, Issue 4, Part D (2020)

Abstract: Maxillary molars present a wide range of root canal configurations ranging from three canals to seven canals. Very few authors have found maxillary molars with seven canals but the incidence of the fourth canal is considered very common now. Therefore, second mesiobuccal canal is no longer considered an accessory canal. This review article describes the anatomy of the maxillary first molar, prevalence, and incidence of MB2 canals, ways to negotiate the hidden MB2, and its significance.