The foreign body of odontogenic origin in the maxillary sinus is referred in literature to as the cause of the development of odontogenic maxillary sinusitis. Impression of the foreign body in the maxillary sinus is generated by the orthogenesis or trauma. Hypergenesis is usually caused by endodontic therapy of upper lateral teeth, implant placement, removal of lateral upper jaw teeth, unrecognized or untreated oroantral fistula and communication, etc. The position of the maxillary sinus between the nose and mouth cavities makes it the most complicated for the appearance of a foreign body and the battery inflammation. Anatomy of the upper jaw and maxillary sinus teeth makes it the most important sinus. Maxillary sinusitis of odontogenic etiology makes 10-12% of maxillary sinusitis. The classic symptoms suggesting odontogenic maxillary sinusitis include unilateral nasal obstruction, youthfulness, and unpleasant odor and taste. Differences in symptomatology between odontogenic macular sinusitis and other sinus infections are not significant. The diagnosis of odontogenic maxillary sinusitis consists of anamnesis, otorinolaringologic clinical tests, intraoral and extracorporeal examinations and radiographic findings (34). Therapy is multiple, including antibiotic therapy, decongestant, analgesic, and a surgical method such as Caldwell Luc surgery, FESS technique or later such as FEDS. Complications are rare but of utmost importance