The odontogenic maxillary sinusitis is the consequence of the distribution of an inflammatory or infectious process of a tooth in sinuses mucous membranes.The purpose of our work is to study epidemiological profile, clinical and radiological characteristics allowing the diagnosis of this pathology as well as the various therapeutic strategies adopted.We report a retrospective study of 31 observations of odontogenic maxillary sinusitis brought together in the service of ORL and of CMF of Rabta hospital over a period of 12 years.In our series, the frequency of this pathology was considered at 42.5% among the group of all maxillary sinusitis brought together during the same period, the average age was of 38 years with a sex ratio of 1.04. The dental antecedents are obvious in 80% of cases, the iatrogenic was found in 64% of cases. Dental causes were dominated buy para-apical cysts (29%), and the movement of the dough canalaire (23%) especially in fongic forms of sinusitis.