Migration of the Dental Implant Into Sinus and Secondary Odontogenic Maxillary Sinusitis: Case Report

Due to the close relationship between the maxillary sinus and the posterior maxillary tooth apices, oro-antral fistula and maxillary sinusitis may occur after interventional procedures performed in this region. In this case, a 53-year-old male patient placed an implant for his left second premolar tooth 7 months ago, but migration of the implant into the maxillary sinus has been detected. Nasal endoscopic examination revealed edema and hyperemia at the level of the left maxillary sinus ostium, but no foreign body was observed. A hyperdense image was reported on paranasal sinus tomography, narrowing the left maxillary sinus ostium and creating an obstruction in the osteomeatal unit. Surgical intervention was planned for the patient, implant material was removed, and the maxillary sinus was cleared of inflamed tissues by the functional endoscopic sinus surgery performed under general anesthesia. With this case that we present to the literature, we aimed to draw attention to odontogenic factors in the etiology of maxillary sinusitis and to raise awareness for the diagnosis and treatment of the disease.