Localized Myositis Ossificans of the Temporal and Lateral Pterygoid Muscles- A Case Report for Open Limitation

측두근과 외측 익돌근에서 발생된 국한성 화골성 근염 : 개구제한을 주소로 내원한 환자의 증례보고

  • Han, Won-Jeong (Department of Oral and Maxillofacial Radiology, College of Dentistry, Dankook University)
  • 한원정 (단국대학교 치과대학 구강악안면방사선학 교실)
  • Received : 2012.11.21
  • Accepted : 2012.12.05
  • Published : 2012.12.30


Localized myositis ossificans is a disease with the main feature of formation of heterotropic bone and fibrous tissue involving muscle. It also called traumatic myositis ossificans. Myositis ossificans is likely to occur in the femoral region or brachium but, rarely in the head and neck including the masticatory muscles. It arises from traumatic episodes caused by prolonged mouth opening, surgical procedure, local anesthesia injection. The main clinical feature is the mouth open limitation. The diagnosis of myositis ossificans is usually based on the patient's history, clinical symptoms and on imaging finding. We present the case of patient with localized myositis ossificans of the temporal and lateral pterygoid muscles.


Myositis ossificans;Masticatory muscles;Trismus;Computed tomography;Magnetic resonance imaging


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