Abstract
Myositis ossificans is a rare condition characterized by heterotopic bone formation in soft tissues, often following trauma. Although it can occur in the maxillofacial region, cases involving the temporalis muscle are infrequent. We report a case of a 33-year-old man who developed severe limitation of mouth opening due to myositis ossificans following closed trauma to the temporal region. Surgical excision was performed. The excision resulted in dural exposure and a small tear, requiring repair with a temporalis fascial graft. This case highlights a rare complication of myositis ossificans in the temporalis muscle, emphasizing the importance of a cautious surgical technique to avoid dural injury while achieving adequate removal of heterotopic ossification.