Fig. 10From: Root and canal anatomy of mandibular first molars using micro-computed tomography: a systematic reviewAhmed's vs Vertucci classification systems. Superscript 2; two rooted molars; MFM: mandibular first molar; M: mesial; D: distal; superscript 1-2-3 = superscript O-C-F: (O) number of orifices, (C) canal configuration, and (F) number of main foramina: MR: mesial root; DR: distal root; CS: classification system; NC: non classifiableBack to article page