Endodontic management of maxillary permanent first molar with 6 root canals: 3 case reports

Efficacy of clinical and radiological methods to identify second mesiobuccal canals in maxillary first molars

“…The number of root canals in these teeth may range from 2-8 [1][2][3]. Based on Vertucci's [4] classification, the mesiobuccal (MB) root canal anatomy of maxillary first molars can be classified into eight types: type I, one single canal that extends from the pulp chamber to the apex; type II, two separate canals leaving the pulp chamber and merging near the apex, forming a single canal; type III, a canal that leaves the pulp chamber, divides into two within the root and merges again into a single canal; type IV, two separate and distinct canals that extend from the pulp chamber to the apex; type V: a canal that leaves the pulp chamber and divides into two near the apex, with distinct apical foramina; type VI: two separate canals that leave the pulp chamber, merge in the body of the root and re-divide close to the apex, with distinct apical foramina; type VII: one canal that leaves the pulp chamber, divides and merges again within the body of the root canal and finally re-divides into two distinct canals short of the apex; and type VIII: three separate and distinct canals extending from the pulp chamber to the apex.…”

Endodontic Treatment of a Maxillary First Molar with Seven Root Canals Confirmed with Cone Beam Computer Tomography – Case Report

“…Although the presence of six root canals is a rare condition, Zheng et al, [2] (n=775) and Baratto-Filho et al, [7] (n=291) were able to document an incidence of 0.31% and 0.34 % respectively. Very few case reports have been presented [8,9]. Baratto-Filho [7] (n=140) was able to report an incidence 0.72 % for seven root canals configuration.…”

Endodontic Management and Cone Beam Computed Tomography Assessment in a Four Rooted Maxillary First Molar

“…Extensive studies and case reports regarding the unusual anatomical variation and configuration of the root canal system in maxillary first molars have been illustrated. These include a single root canal in a single root [11,12], two root canals [13], five root canals [14,15,16,17,18], six root canals [19,20,21], seven root canals [22], eight root canals [1], Cshaped canals [23,24], fusion of two buccal roots [25], fusion of two buccal roots with two palatal roots [26], four roots including an additional palatal root [27][28][29][30][31][32][33] and also five roots [31]. There are innumerable case reports and clinical studies of maxillary first molar on varied root canal morphology.…”