[Maxillary sinusitis of dental origin].

A survey is given of etiology, diagnosis and treatment of maxillary sinusitis from dental origin. Periapical infection and oro-antral fistula are among the most frequent causes. Removal of the dental origin is of primary importance and sometimes the sole removal of the odontogenic cause is a sufficient therapy. On the other hand closure of oro-antral fistula without simultaneous cure of the concomitant sinusitis is of no use.