Mandibular second premolar with C-shaped canal diagnosed with CBCT technology: case report with 24 months of follow-up

Root canal anatomy can greatly vary by tooth and among teeth with the same type. The aim of this case report was to describe the management of a C-shaped canal in 21-year-old male Saudi patient presented with severe pain in the left second premolar mandibular tooth. It was diagnosed with cone beam computed tomography (CBCT). The C-shaped configuration exhibited fins, web-like connections, or an elongated ribbon-shaped appearance, which rendered cleaning, shaping, and obturation difficult. The use of modern endodontic tools, such as CBCT system; dental operating microscope, which facilitates cleaning and shaping; and bioceramic sealers accelerated sealing and healing. After 24 months of follow-up, clinical and radiographic evaluation revealed the absence of signs and symptoms; reduction in the size of the periapical lesion; and starting of complete healing.