Dentigerous cyst associated with ectopic tooth at the roof of maxillary sinus

Abstract

Dentigerous cyst is the most common developmental odontogenic cyst of the jaws. They are frequently 
associated with impacted mandibular third molars and the maxillary canines. Association of ectopic tooth in 
the maxillary sinus with dentigerous cyst is quite uncommon. We report a case of dentigerous cyst 
associated with ectopic tooth at the roof of the maxillary sinus manifesting as a unilateral facial swelling with 
encroachment into the nose and orbit. This article addresses its unusual location, the important aspect of its etiopathologenesis, its clinical characteristics, differential diagnosis and management.