Unusual root and canal morphology of the mandibular first molar as an indication for cone-beam computed tomography: About a "borderline" endodontic case

Cone-beam computed tomography (CBCT) is a promising tool in dental practice. CBCT provides three-dimensional images and imaging resolution to be used in endodontics. This enhances the diagnosis of various pathologies. However, guidelines have recommended limiting its use due to overexposure to radiation. This article presents the rare case of a mandibular molar with a single root and canal that benefited from taking a CBCT. A 48-year-old woman is referred for endodontic treatment of the permanent left mandibular first molar. The preoperative radiographic examination showed an unusual canal centered along a single root. Taking a CBCT with the relevant information and the patient's consent improved her diagnosis and treatment. CBCTs should not be used routinely for these purposes but could be justified in "borderline" cases. This paper discusses its indication and clinical implementation following current recommendations and guidelines.