Résumé -Introduction :Les sinusites maxillaires sont des infections fréquentes de la sphère ORL. On retrouve une étiologie dentaire dans environ 40 % des cas. L'extension des infections dentaires dans le sinus maxillaire est possible en raison de la proximité des racines des dents postérieures avec le bas fond sinusien. Observation : Un patient âgé de 27 ans était hospitalisé pour une tuméfaction frontale et orbitaire accompagnée d'une odontalgie ipsi-latérale. Les examens mettaient en évidence une pansinusite antérieure ethmoïdo-fronto-maxillaire d'origine dentaire. Le diagnostic et la prise en charge nécessitaient un bilan radiologique précis. Le traitement intéressait conjointement la cause dentaire et la sinusite. Une méatotomie moyenne associée à un élargissement du canal nasofrontal était réalisée afin de restaurer la fonction sinusienne. L'évolution était favorable. Commentaires et conclusion : Ce cas est atypique par son origine dentaire. Il illustre l'extension inhabituelle d'une infection d'origine dentaire dans le sinus maxillaire et le sinus frontal.Abstract -Ethmoido-fronto-maxillary sinusitis of dental origin: a case report. Introduction: Maxillary sinusitis is a common infection of the ENT sphere. A dental origin is found in about 40% of cases. The roots of the posterior maxillary teeth are adjacent to the sinus floor; extensions of dental infections are therefore possible to the nearby sinus. Case report: A 27-year-old patient was admitted for a frontal and orbital tumefaction associated with homolateral odontalgia. Investigations revealed fronto-ethmoido-maxillary sinusitis of dental origin. Conventional radiographs and CT scans were required for the diagnosis and proper management. Dental treatments combined with oral antibiotics to treat the infection were required. Endoscopic meatotomy associated with the enlargement of the nasofrontal duct was necessary to complete the treatment and restore adequate sinusal function. The evolution was favorable. Comments and conclusion: This case is atypical due to its dental origin; it illustrates an unusual extension of an odontogenic infection to the maxillary and frontal sinus.
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