Zmener O, Peirano A
Department of Adult Dental Care, Faculty of Odontology, University of Buenos Aires, Argentina.
J Endod. 1998 May;24(5):376-7. doi: 10.1016/S0099-2399(98)80138-6.
In this study, we report a case of a four-rooted maxillary second molar in which three well-separated buccal roots were located. This case demonstrated that even though it is not common, an extra root containing an independent root canal may occur.