Dentigerous cyst of the maxilla with impacted tooth displaced into orbital rim and floor.

We report a case of dentigerous cyst of the maxilla and maxillary sinus that caused the ectopic displacement of an unerupted tooth into the orbital rim and floor. After an incisional biopsy, marsupialization of the lesion promoted its involution and stimulated osteogenesis. This in turn simplified the surgical enucleation of the specimen and removal of the unerupted tooth without the excessive loss of the bony contours of the maxilla.