Detection, characterisation and management of complex root canal configurations in the mesiobuccal roots of maxillary first molars: A case series.

This report presents the detection, characterisation, instrumentation and filling of complex canal configurations in the mesiobuccal (MB) root of maxillary first molars. Three patients were referred for root canal treatment in first maxillary molars. Medical history, age, sex and clinical findings were recorded. Intraoral periapical radiographs and cone beam computed tomography (CBCT) were used for diagnosis and pre-operative assessment. Using Ahmed et al. (2017) classification system, codes 3 MaxM MB 3-5-4-2 DB 1-2-1 P 1 (case 1), 3 MaxM MB 2-5-3-2 DB 1 P 1 (case 2) and 3 MaxM MB 1-4-2-1-2 DB 1 P 1 (case 3) were identified. Using the dental operating microscope, CBCT (if indicated) and troughing up to 3 mm allowed identification of more than three canals in the MB root of maxillary first molars. The coding system proposed by Ahmed et al. (2017) allows the classification of MB roots with highly complex canal configurations.