Abstract
A case of a tooth erupting in the maxillary sinus is reported. A 15-year-old female was hospitalized bacause of diplopia and purulent left nasal discharge. She had a history of purulent sinusitis and Grave's disease. Ophthalmonogically, she also showed a upward deviation of the left eye. CT scan revealed left maxillary sinusitis with a tooth-like structure attached to the posterior wall of the sinus and a high density area at the innerside of the left orbit due to inflammatory change.It was, therefore, considered that diplopia was caused by sinusitis due to the erupted tooth rather than hyperthyroidism.Under general anesthesia, the erupted tooth was extracted by the Caldwell-Luc procedure.There was no bony destruction of the orbit or the maxillary sinus, nor cyst formation.Two months after surgery, diplopia and deviation of the left eye had completely disappeared. Reccurrence of maxillary sinusitis has not been observed to date.
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