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The Danis–Weber classification (often known just as the Weber classification) is a method of describing ankle fractures. It has three categories: ;Type A Fracture of the lateral malleolus distal to the syndesmosis (the connection between the distal ends of the tibia and fibula). * below level of the ankle joint * tibiofibular syndesmosis intact * deltoid ligament intact * medial malleolus often fractured * usually stable : occasionally nonetheless requires an open reduction and internal fixation (ORIF) ;Type B Fracture of the fibula at the level of the syndesmosis * at the level of the ankle joint, extending superiorly and laterally up the fibula * tibiofibular syndesmosis intact or only partially torn, but no widening of the distal tibiofibular articulation * medial malleolus may be fractured or deltoid ligament may be torn * variable stability ;Type C Fracture of the fibula proximal to the syndesmosis. * above the level of the ankle joint * tibiofibular syndesmosis disrupted with widening of the distal tibiofibular articulation * medial malleolus fracture or deltoid ligament injury present * unstable : requires ORIF Categories B and C imply a degree of damage to the syndesmosis itself (which cannot be directly visualised on X-ray). They are inherently unstable and are more likely to require operative repair to achieve a good outcome. Type A fractures are usually stable and can be managed with simple measures, such as a plaster of paris cast. ==References== 〔 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Danis–Weber classification」の詳細全文を読む スポンサード リンク
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