下顎頭部骨形成線維腫に下顎頭切除術と下顎枝垂直骨切り術を用いて再建を行った１例

• Published in: 日本口腔外科学会雑誌 Vol. 71; no. 5; pp. 234 - 240
• Main Authors: 森岡 怜音, 石塚 真士, 古谷 龍人, 辰巳 博人, 小林 真左子, 管野 貴浩
• Format: Journal Article
• Language: Japanese
• Published: 公益社団法人 日本口腔外科学会 20.05.2025
• Subjects: 下顎枝垂直骨切り術; 下顎頭再建; 下顎頭切除術; 下顎頭腫瘍; 骨形成線維腫
• ISSN: 0021-5163; 2186-1579
• DOI: 10.5794/jjoms.71.234

Ossifying fibromas are benign fibro-osseous lesions, commonly involving the posterior mandible in middle-aged individuals, and have a female predilection. Ossifying fibromas in the mandibular condyle are rare. Here, we report a case of ossifying fibromas in the mandibular condyle treated with a condylectomy and reconstruction using the vertical ramus sliding osteotomy technique. A 50-year-old woman was referred to our department by a family doctor because of discomfort in the right temporomandibular joint and pain on mandibular movement. CT and MR images revealed a solitary lobulated mass with well-defined borders and no soft tissue invasion in the right condylar head. 99m Tc-MDP accumulation was observed in the same area. A surgical procedure using an Al-Kayat incision and a high perimandibular approach was performed to excise the condyle. After the condylectomy, a 10 mm vertical defect was observed and reconstructed using a vertical sliding osteotomy of the mandibular ramus. Rigid internal fixation was achieved using two titanium locking miniplates. The histopathological diagnosis was ossifying fibroma. Intermaxillary elastic traction was continued for one month. One month postoperatively, good pain reduction, good mouth opening, and no deviations or malocclusions were observed. No recurrence or jaw dysfunction was noted three years postoperatively.