Recognition of unusual canal configurations and variations are paramount because it has been established that the root with a single tapering canal and the apical foramen is the exception rather than rule. A female patient presented with symptoms of pain in the left upper quadrant. A diagnosis of irreversible pulpitis was arrived at. Magnification and illumination aided in the visualization of a premolar with three roots. Root canal treatment was then successfully completed.

Keywords: Radiculous premolar, Magnification, Diagnosis.