外踝短缩对踝关节面应力分布的影响
外踝;,踝关节;,应力;,生物力学,,外踝;,踝关节;,应力;,生物力学,1材料和方法,2结果,3讨论,参考文献
【摘要】 目的:探讨外踝短缩所致创伤性踝关节炎发生的生物力学机制。方法: 选取8只新鲜冷冻尸体下肢，分别在外踝正常长度、短缩1/3、短缩2/3和短缩3/3的情况下，测量和分析踝关节面应力分布的变化。结果: 踝关节应力接触区大致呈三角形，外踝短缩后踝关节面应力分布发生变化，以向前、内、外侧压力增高最为显著。结论: 外踝短缩后踝关节面应力分布发生明显变化，这可能是导致创伤性关节炎发生的重要机制。【关键词】 外踝; 踝关节; 应力; 生物力学
Influence of Shortened Lateral Malleolees on the Stress Force Distribution of the Ankle Joint
ZOU Yuwei,ZHANG Xiuqin，YANG Xinming， et al
Department of Orthopaedics,The First Affiliated Hospital,Hebei Northern University，Zhangjiakou,075000,Hebei,China;Stomatology Faculty，Medical School of Jinan University，Guangzhou,510632,Guangdong,China
【ABSTRACT】 Objective: To investigate the biomechanism of traumatic ankle arthritis resulted from shortened lateral malleolus. Methods：The lower extremity specimens of eight fresh frozen cadaver were used.At the lengthes of normal、shortened 1/3、shortened 2/3 and shortened 3/3 lengthes，the tibial astragaloid joints area and pressure were measured. Results：The contact area of the normal tibial astragaloid joint looked like triangular analyzed by shapes of dyeing area. The stress force of the tibial astragaloid joint changed in the consequence of shortened lateral malleolus, and it increased especially to the front, inside and lateral. Conclusion：The stress force of the tibial astragaloid joint will changed in the consequence of shortened lateral malleolus,maybe it is the important mechanism of traumatic ankle arthritis. ......
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