Vol. 7, Issue 3, Part A (2023)

A dentigerous cyst is a pathology of odontogenic origin, that evolves due to the accumulation of fluid between the reduced enamel epithelium layer and the tooth/ crown structure. The incidence of dentigerous cysts is around 1.44 per 100 unerupted teeth. The association of teeth is common. However ectopic position below the floor of the orbit is seldom reported in literature. Diagnosis of a dentigerous cyst is often an incidental finding on routine radiographs as it remains asymptomatic for years. Once diagnosed, it should be routinely intervened as it can cause resorption of the surrounding bone and tooth structure leading to the involvement of vital structures. The incidence of a maxillary third molar in association with a dentigerous cyst is very rare. This is the first case to report the incidence of a dentigerous cyst associated with an ectopically placed third molar below the orbital floor causing resorption of the floor. The possible complications of the case are hypogeous and periorbital infection.