2025 年 14 巻 3 号 p. 156-162
Root canal treatment of the maxillary first molar is often described as difficult. The presence of two root canals in the distal root is very rare, occurring in only 1.7％ of cases, and the existence of multiple disto-buccal root canals is hard to identify on dental X-rays, and their treatment is also difficult. In the present study, we performed a Cone-beam computed tomography (CBCT) examination to identify the cause of persistent discomfort after pulpectomy. On examination, we found the disto-buccal second root canal in addition to the mesio-buccal second root canal using a surgical microscope, and root canal treatment was performed. As a result, good clinical success was achieved.
From this result, it is concluded that the use of CBCT and surgical microscope for root canal treatment in case of a maxillary first molar with five root canals is valuable.
