外耳道骨折を併発した下顎骨正中部骨折の1例

• Published in: 日本口腔外科学会雑誌 Vol. 64; no. 5; pp. 274 - 278
• Main Authors: 山本, 大介, 目瀬, 浩
• Format: Journal Article
• Language: Japanese
• Published: 社団法人 日本口腔外科学会 20.05.2018
• Subjects: 下顎骨骨折; 外耳道出血; 外耳道閉鎖・狭窄症; 外耳道骨折
• DOI: 10.5794/jjoms.64.274
• ISSN: 0021-5163

Case reports describing mandibular fractures associated with external auditory canal fractures without condylar fractures are extremely rare. We report a case of mandibular and external auditory canal (EAC) fractures. A 56-year old man was referred to our department because of pain on opening and closing of the jaw. He had hypertension, diabetes mellitus, sleep apnea syndrome, and familial myoclonus epilepsy. In January 2014, he bruised his chin and precordial region when he fell down because of orthostatic hypotension. He was transported to a nearby general hospital and underwent treatment for a laceration on the chin. He was introduced to our department to receive treatment for hemorrhage from both the EAC fracture and mandibular fracture. Local examination showed disturbed mouth opening due to jaw pain and bloody discharge from both auditory canals. There was also a laceration on the chin. Computed tomography (CT) disclosed a fracture line at the mandibular symphysis and both EACs, but the auditory ossicles were not separated. The patient was treated by packing both auditory canals in consultation with the Department of Otolaryngology. We performed open reduction and internal fixation (ORIF) surgery with the patient under general anesthesia, and intermaxillary fixation (IMF) was secured for 1 week. The patient was followed up for 1 year, and healing was satisfactory with no subsequent stenosis of the auditory canal.