A case of foreign body of dental implant in the ethmoid sinus

Abstract

　In recent years, the number of cases of sinusitis caused by the foreign body of a dental implant has increased. However, the foreign body of a dental implant in the ethmoid sinus is extremely rare. We experienced the case of a 66-year-old man who was diagnosed with chronic sinusitis by MRI and medical treatment was done at the department of internal medicine in a nearby general hospital. However, there was no improvement, so he was referred to our department a few months later. CT scan indicated a foreign body made of metal in the ethmoid sinus, so we removed it by endoscopic sinus surgery. The foreign body was a dental implant that had been placed almost 10 years earlier.