下顎頭関節包内骨折後, 関節腔内の変化を経時的に観察した1症例

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Fracture of the mandibular head occurs rather frequently, and its symptoms, diagnosis and treatment are well documented. However, little is known about the intra-articular injury that unavoidably occurs when the mandibular head is fractured. In this study, we evaluated the time-related changes in the morphology of the intra-articular cavity in a case of displaced fracture of the mandibular head. For evaluation, we relied mainly on arthroscopic pictures and double-contrast computed tomography.<BR>A 46-year-old woman had an epileptic seizure and fell down a flight of stairs. She was transfered to our hospital and diagnosed as having fractured unilateral mandibular heads. Changes in the intra-articular morphology with time were monitored by double-contrast CT before, during and after treatment. Arthroscopic surgery was performed to repair the fibrous ankylosis and the backward traction of the articular disc. As the intra-articular injury healed, the joint cavity shrank and eventually disappeared. The articular motility almost returned to the normal range.
社団法人日本口腔外科学会の論文