Endodontic Retreatment Due to Periapical Lesion from an Untreated Second Mesiobuccal Canal: Clinical Case Report
DOI:
https://doi.org/10.12974/2311-8695.2025.13.07Keywords:
Second mesiobuccal root canal (MB2), Molar, Endodontics, Root canal anatomy, Root canal therapy, Apical periodontitisAbstract
Objective: To report the endodontic retreatment of tooth 26 with an extensive periapical lesion, assessing the clinical and radiographic evolution. Case report: A 36-year-old male patient, with a history of endodontic treatment of tooth 26 performed approximately six years earlier, presented discomfort in the maxillary molar region. Radiographic and cone-beam computed tomography (CBCT) examinations revealed an extensive periapical lesion and the presence of a second untreated mesiobuccal canal (MB2). Retreatment was performed on the palatal (P), distobuccal (DB), and mesiobuccal (MB) canals, in addition to treatment of MB2, using calcium hydroxide–based intracanal medication and obturation by the lateral condensation technique. During follow-up, evidence of complete lesion regression and bone repair was observed. Conclusions: Endodontic retreatment with the technique used proved effective in promoting regression of the extensive periapical lesion, representing a conservative alternative to periradicular surgery. The high capability of CBCT in elucidating situations involving complex anatomical variations was also evident, highlighting its relevance as a valuable tool in the management of such cases.
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