Li Hong-Yun, Zhou Ru-Shou, Hua Ying-Hui, Chen Shi-Yi
Department of Sports Medicine and Arthroscopy Surgery, Sports Medicine Center of Fudan University, Huashan Hospital, Shanghai, China.
Department of Orthopaedic, Kunming Municipal Hospital of Traditional Chinese Medicine, Kunming, Yunnan, China.
Int J Sports Med. 2017 Jul;38(7):546-550. doi: 10.1055/s-0043-106741. Epub 2017 May 8.
Specific anatomic variations of the ankle mortise may be found in people with ankle instability. The purpose was to evaluate the fibular and talus position in subjects with mechanical ankle instability (MAI). In this study, MR images of 54 patients with MAI and 51 patients from the author's institution for reasons unrelated to ankle instability were reviewed. The position of the fibular in relation to the talus (axial malleolar index, AMI) and medial malleolus (intermalleolar index, IMI) were evaluated at the axial plane. Meanwhile, the rotation of the talus was measured and calculated using a new index, the Malleolar Talus Index (MTI), which is measured in relation to the medial malleolar. The results showed that the AMI in the MAI patients increased significantly when compared to that in the control group. However, there was no statistically significant difference in the IMI between instability and control groups. The MTI increased significantly in the MAI patients when compared to that in the control group. The conclusion was that the patients with MAI have more of an internally rotated talus than a variation of fibular position.
踝关节不稳的患者可能存在踝关节 mortise 的特定解剖变异。目的是评估机械性踝关节不稳（MAI）患者的腓骨和距骨位置。在本研究中，回顾了54例MAI患者和51例因与踝关节不稳无关的原因来自作者所在机构的患者的磁共振图像。在轴位平面评估腓骨相对于距骨的位置（轴向踝指数，AMI）和内踝（踝间指数，IMI）。同时，使用一个新的指数，即距骨踝指数（MTI）来测量和计算距骨的旋转，该指数是相对于内踝测量的。结果显示，与对照组相比，MAI患者的AMI显著增加。然而，不稳组和对照组之间的IMI没有统计学上的显著差异。与对照组相比，MAI患者组的MTI显著增加。结论是，MAI患者的距骨内旋更多，而非腓骨位置变异。
