Root-canal treatment of a trifid crown premolar.
AIM: To describe successful root-canal treatment of a permanent maxillary first premolar with unusual anatomy. SUMMARY: A diagnosis of irreversible pulpitis of a geminated first premolar was made. Clinical and radiographic examination revealed a tooth with a trifid crown that joined to give the appearance of a single root at the cementoenamel junction. Root-canal treatment involved three separate access openings and treating four canals, three of which joined to exit through a common foramen. KEY LEARNING POINTS: Symptomatic teeth with morphological aberrations can be saved by root-canal treatment. Careful clinical and radiographic evaluation are essential, as treatment must be modified to address the unusual complexities of the root-canal system(s).