Willis動脈輪閉塞症術後に生じた開口障害症例の1例

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  • A case of trismus developing after surgery for Willis' circle occlusion.

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Willis'circle occlusion refers to stenosis or occlusion of the internal carotid artery arising from Willis'circle, associated with visible capillaries comprising the collateral circulation.<BR>The patient was a 27-year-old woman who had previously undergone duraencephalosynangiosis at 17 years of age and extracranial-intracranial bypass surgery at 23 years of age. She was examined at the Department of Oral and Maxillofacial Surgery, Nara Medical University Hospital on January 12, 2000 because of temporomandibular joint (TMJ) pain and limited mouth opening. At presentation, maximum mouth opening was 17mm. We describe the successful treatment of severe pain of the left TMJ and trismus by mobilization of the TMJ.<BR>The pain caused hyperventilation, cataplexy, and numbness of the hands and feet. Angiography showed that blood flow had improved after the extracranial-intracranial bypass. Conservative treatment was unsuccessful. On March 3, 2000, mobilization of the TMJ was done under general anesthesia. The superficial temporal artery was exposed, and blood flow was managed with by microdoppler technique.<BR>Postoperatively, the patient's pain resolved, and maximum mouth opening increased significantly from 17mm to 38mm. Forward movement and lateral movement increased to 8mm.<BR>The improvement on a visual analogue scale was also significant. No complications have occurred. As of 15 months after the operation, the response of Willis' circle occlusion to treatment has been good.

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