Abstract

Dentigerous cysts are a type of odontogenic cyst that mostly develops in association with the third molar tooth. Dentigerous cysts are often asymptomatic but sometimes might be complicated by infection, sinusitis, or bone expansion. A 22-year-old black male patient was admitted to our hospital with complaints of 1- week progressive left-sided facial swelling, left cheek pain, and nasal obstruction. Physical examination revealed swelling on the left side of the face and tenderness in the maxillary region with palpation. Oral examination showed emptiness at the site of left maxillary third molar tooth. The patient underwent paranasal sinus CT. CT showed a 26x41 mm cystic lesion associated with alveolar process defect in left maxillary sinus antrum. There was a thin calcified wall around the cyst and a third molar tooth in the anterior wall. The cyst eroded the lateral wall of the maxillary sinus and spread adjacent soft tissue plans. The patient was operated with Caldwell-Luc procedure. The ectopic tooth was removed and all cyst contents were evacuated. The patient’s complaints were disappeared at the control.