Fig. 4From: Prevalence and location of the secondary mesiobuccal canal in 1,100 maxillary molars using cone beam computed tomographyAxial view of left maxillary first molar. PMB1 (center of mesiobuccal canal), PMB2 (center MB2 canal), PP (center palatal canal). Straight lines were projected, joining the different points: PMB1-PP line and PMB1-PMB2 line. A third line was drawn, PMB2-PT, corresponding to a perpendicular line between PMB2 and the PMB1-PP line (PT point). The distance in the lines drawn between the points was measured in millimetersBack to article page