This document provides diagnostic terminology recommended by the AAE Consensus Conference for pulpal and apical conditions. It defines normal pulp and various stages of reversible and irreversible pulpitis, as well as pulp necrosis. For apical conditions, it defines normal apical tissues and various inflammatory conditions including symptomatic and asymptomatic apical periodontitis, acute and chronic apical abscesses, and condensing osteitis. The terminology is intended to standardize descriptions of pulpal and apical diagnoses.