Management of odontogenic sinusitis with persistent oro-antral fistula.

Sixteen patients were treated for odontogenic sinusitis secondary to persistent oro-antral fistula. Males outnumbered females 12 to 4. Frequency of presentation increased directly with age. Chronic signs and symptoms included facial pain, swelling, tenderness and nasal and oral discharge. The clinical diagnosis of chronic sinusitis was confirmed in all cases by radiographic findings. An opacified maxillary sinus with or without ethmoid involvement was observed in all 16 patients. Surgical pathology revealed chronic mucosal thickening and/or antral polyps in 69% of the cases. Surgical treatment of the sinusitis consisted of antrostomy alone or in combination with Caldwell-Luc procedure. The oro-antral fistula was repaired with mucosal flaps from the buccal and/or palatal region. No postoperative recurrences have been noted during a follow-up period of six months to seven years. Bacterial cultures grew out pure aerobes (44%) or mixed aerobic-anaerobic bacteria (44%). None yielded pure anaerobes. The bacteriologic spectrum was notably lacking in S. pneumoniae and H. influenzae and differed from organisms commonly found in sinusitis of rhinogenous origin.