Infected Dentigerous Cyst Associated with Maxillary Third Molar Displaced at Orbital floor within a Maxillary Sinus Abstract Dentigerous cysts are the most common type of developmental odontogenic cysts arising from crowns of impacted embedded or unerupted teeth Such cyst remains initially completely asymptomatic unless infected and can be discovered only on routine radiographic examination They constitute about 20 of all epithelium lined cysts of the jaws The teeth involved most often are mandibular third molar and maxillary canines About 70 of Dentigerous cysts occur in the mandible and 30 in the maxilla Dentigerous cyst associated with maxillary third molar displaced in the maxillary sinus at orbital floor is fairly rare we are reporting a case in the present paper KEY WORDS Dentigerious cyst impacted tooth Third molar maxillary sinus Orbital floor INTRODUCTION Dentigerous cyst is the second most common odontogenic cyst developed by the accumulation of fluid within the follicular space of an un erupted or impacted tooth after its crown has fully formed 1
