Odontogenic Maxillary Sinusitis

Odontogenic infections primarily involve the maxillary sinus therefore the term “Odontogenic Maxillary Sinusitis” (OMS) is more appropriate than “Odontogenic Sinusitis”. OMS is generally under-diagnosed and is frequently missed by the rhinologists, dentists, and radiologists. Dental interventions and periapical infections are the primary causes of OMS. The incidence of implant-related maxillary sinusitis has increased especially after “sinus lift” procedures. The doctor should explicitly ask the patients about their dental history because most patients do not volunteer this information and because sinus infection may develop several months following dental treatment. Unilateral malodorous nasal discharge, nasal obstruction, and pain over the cheek are the most frequent symptoms. CT scans and cone beam CT (CBCT) are the gold standard radiologic modality for diagnosing OMS. Treatment options include dental treatment, antibiotics, endoscopic sinus surgery, and closure of oroantral communication (OAC) or fistula (OAF).