PDF: Dentigerous Cyst Associated with an Ectopically Unerupted Maxillary Third Molar below Infraorbital Region. A Rare Case Report

A Dentigerous cyst or follicular cyst is a form of odontogenic cyst occurring frequently during the development processes of the teeth. 

It is associated with pressure exerted by the crown of an unerupted (or partially erupted) tooth on the fluid within the follicular space.

Typically, dentigerous cysts are painless and discovered during routine radiographic examination. However, they may be large enough resulting in a palpable mass. 

As they expand, can displace adjacent teeth resulting in gross swelling of the involved region. They almost exclusively occur in permanent dentition.

The cyst is lined by stratified squamous non-keratinizing epithelium. About 70% of dentigerous cysts occur in the mandible and 30% in the maxilla. Dentigerous cysts associated with ectopic teeth within the maxillary sinus are very rare.

We report radiologic and pathologic features in a rare case of infected dentigerous cyst of maxillary sinus arising from an ectopic third molar in a 20-year-old female patient.

Case Presentation 

A 20-year-old female patient reported to the department of Dentistry, IGIMS, Patna, with a history of progressive swelling on the right side of the face with discharge of pus from the third molar region her past medical and dental history was unremarkable.

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