This communication presents the treatment of 15 cases of c-shaped canals in molars and their treatment outcome with two different obturation methods. The data from 901 patients who received root canal treatment in a molar tooth were examined regarding c-shaped root canals, their treatment and their status one year post op. Among the 901 cases, 15 molars had a c-shaped root canal morphology (1,66%). C-shaped canals occurred mainly in second mandibular molars (73,3%). The obturation was either performed with gutta-percha and sealer (5 cases) or with Mineral Trioxide Aggregate as apical plug (MTA; 10 cases). All cases reached a symptomless status clinically and 14 cases showed apical healing in the radiographic control.

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