A case of subdural abscess caused by strayed implant body into the maxillary sinus

Abstract

  We report a rare case of subdural abscess secondary to sinusitis by accidental insertion of implant. A 59-year-old man was referred to tachikawa hospital for removing implant inserted into left maxillary sinus accidentally. It was occurred after dental implantation at the left maxillary second molar area. We planned the surgery to remove it, but he was rushed to the hospital emergently due to lose his consciousness before surgery. CT and MRI examination revealed that subdural abscess was observed at the right cortex of frontal lobe. We diagnosed it as subdural abscess secondary to sinusitis by accidental displacement of dental implant. After administration antibiotics intravenously, we performed removing implant body and intraoral antrostomy. Then, antibiotics were administered intravenously. Furthermore, drainage by craniotomy was accurately carried out. The pathogens for subdural abscess were not elucidated. After all procedures, MRI examination showed no evidence of subdural abscess, and patient was relieved and left our hospital.