陳旧性両側顎関節脱臼に両側下顎枝垂直骨切り術を行った１例

• Published in: 日本口腔外科学会雑誌 Vol. 70; no. 9; pp. 379 - 384
• Main Authors: 野上, 晋之介, 柳沢, 佑太, 大竹, 義雄, 山内, 健介, 岩間, 亮介, 佐藤, 舜
• Format: Journal Article
• Language: Japanese
• Published: 公益社団法人 日本口腔外科学会 20.09.2024
• Subjects: 両側下顎枝垂直骨切り術; 観血的整復術; 陳旧性顎関節脱臼; 顎関節外科
• ISSN: 0021-5163; 2186-1579
• DOI: 10.5794/jjoms.70.379

Chronic bilateral dislocation of the temporomandibular joint is a relatively rare disorder that occurs when TMJ dislocation has not been repaired for a long period of time. It is often treated by surgical repositioning. We report a case of chronic bilateral anterior dislocation of the temporomandibular joint due to six months of neglect, which was treated via a bilateral intraoral vertical ramus osteotomy (IVRO). The patient was a 62-year-old man. He developed TMJ dislocation triggered by excessive opening of the mouth due to yawning. The patient was advised to see an oral surgeon, however he left the condition untreated for six months. Thereafter the patient was diagnosed with chronic temporomandibular joint dislocation and was referred to the Department of Oral and Maxillofacial Surgery, Tohoku University Hospital. The painless opening amount was 40 mm and the mouth could not be closed. Panoramic radiographs showed anterior dislocation of the bilateral temporomandibular joints. We attempted to restore the condyle under general anesthesia, however repositioning of the condyles was difficult, so a bilateral osteotomy (IVRO) was performed on the jaw to close the mouth. Three years after surgery, the oral mobility range was maintained at 36 mm, and no recurrence was observed.