Long-standing dental foreign bodies in the paranasal sinuses successfully treated with endoscopic sinus surgery: Report of two cases

Although paranasal sinus foreign bodies were historically considered uncommon, iatrogenic cases related to dental procedures have increased with the widespread use of implants. Migrated implants may remain asymptomatic but can eventually cause sinonasal inflammation or serious complications. We report two cases of long-standing dental implant foreign bodies in the paranasal sinuses. In Case 1, an early-70s woman developed maxillary discomfort 13 years after implant placement. In Case 2, an early-80s man was incidentally diagnosed with a migrated implant 11 years after peri-implant fixture loss. In both cases, computed tomography demonstrated implants associated with sinusitis. Endoscopic sinus surgery enabled complete removal of the foreign bodies. Postoperatively, symptoms resolved and normal mucosa was restored. Even long-standing and asymptomatic dental implant foreign bodies can be successfully treated with endoscopic sinus surgery. Early removal should be considered regardless of symptoms, and close medical–dental collaboration is essential to prevent delayed complications.