Table 1.

Variations of roots and the canal anatomy of maxillary molars, as reported by various authors, with the numerous terms that have been used to name these aberrancies.

Root nomenclature	Root canal nomenclature	Reference
MB, DB, MP, DP	MB, DB, MP, DP	Di Fiore, 1999 [20]
MB, D, P	MB1, MB2, P1, P2, D	Johal, 2001 [16]
MB, DB, P	MB1, MB2, DB, P1, P2, P3	Maggiore et al., 2002 [17]
MB, DB, P	MB1, MB2, MP, DB, P	Favieri et al., 2006 [11]
MB, DB, P	MB1, MB2, DB, P1, P2	Aggarwal et al., 2009 [18]
MB, MP, P, DB	MB, MP, M, P, DP, DB	Adanir, 2007 [3]
MB, DB, P	MB, MP, DB, 3P	Pasternak Júnior et al., 2007 [13]
MB, DB, 1st P, 2nd P	MB, DB, P1, P2	Ulusoy and Görgül, 2007 [19]
MB, DB, P	MB, DB, 2P	Poorni et al., 2008 [15]
MB, DB, P	MB1, MB2, MB3, DB, P	Ozcan et al., 2009 [12]
MB, DB, P	2MB, 2DB, 2P	de Almeida-Gomes et al., 2009 [14]
MB1, MB2, DB, MP, DP	MB1, MB2, DB, MP, DP	Kottoor et al., 2010 [4]
MB, DB, P	MB1, MB2, MB3, DB1, DB2, MP, DP	Kottoor et al., 2010 [7]
MB, DB, P	MB1, MB2, DB1, DB2, MP, DP	Albuquerque et al., 2010 [21]
MB, DB, P	MB, SMB, SDB, DBP, MBP,	Karthikeyan and Mahalaxmi, 2010 [10]
	DB, MP, DP

MB: mesiobuccal, DB: distobuccal, P: Palatal, MP: mesiopalatal, DP: distopalatal, M: mesial, D: distal, SMB: second mesiobuccal, MBP: mesiobuccopalatal, SDB: second distobuccal, DBP: distobuccopalatal.