ROOT CANAL TREATMENT OF A MANDIBULAR FIRST MOLAR WITH RADIX ENTOMOLARIS USING A MICROSCOPE AND CONE-BEAM COMPUTED TOMOGRAPHY

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Radix entomolaris (RE) appears more frequently in the Mongolian population than in Caucasian and African populations. A case of root canal treatment of a mandibular first molar with radix entomolaris is reported. The patient was a Japanese male in his 40s with spontaneous pain of #36. On imaging examinations including dental X-rays and cone-beam computed tomography (CBCT), #36 had 3 roots with RE. Before root canal treatment, the operator could understand the root numbers of #36 and the root canal morphology. #36 was examined under the microscope, and root canal treatment was well done. CBCT and use of a microscope provided the operator with effective information for root canal treatment.