Engsberg J R, Grimston S K, Wackwitz J H
Department of Sports Sciences and Physical Education, University of Denver, Colorado.
J Orthop Res. 1988;6(5):749-57. doi: 10.1002/jor.1100060518.
The purpose of this investigation was to determine the capacity of talocalcaneal/talocrural joint orientations to predict talocalcaneal (TC) joint orientations. A custom designed orientation-loading fixture was used to position the calcaneus and shank with six degrees of freedom, and to apply loads in three orthogonal directions. Three reference pins were rigidly mounted in the calcaneus, talus, and shank segments to provide position data in 243 test situations. Test data were fitted to statistical models using analysis of variance. The models were then used to determine the capacity to predict talus positions from shank positions, both with respect to the calcaneus. Results indicated large between and within specimen variation and was attributed to individual joint morphology. It was concluded that (a) eversion-inversion orientations of the TC/talocrural joint were not always accurate indicators of TC joint orientations, (b) abduction-adduction orientations of the combined joint had the greatest overall influence on TC orientations (thus, monitoring eversion-inversion and abduction-adduction orientations of the combined joint would be more valuable in predicting pronation-supination positions than monitoring only eversion-inversion orientations), and (c) foot categories based on TC and TC/talocrural joint morphology should be developed. They would provide more accurate prediction for specimen foot orientations than prediction from overall average values.
本研究的目的是确定距下关节/距小腿关节的方向预测距下关节（TC）方向的能力。使用定制设计的方向加载夹具，以六个自由度定位跟骨和小腿，并在三个正交方向上施加负荷。在跟骨、距骨和小腿节段中刚性安装三个参考销，以提供243种测试情况下的位置数据。使用方差分析将测试数据拟合到统计模型中。然后使用这些模型确定从相对于跟骨的小腿位置预测距骨位置的能力。结果表明，样本间和样本内存在较大差异，这归因于个体关节形态。得出的结论是：（a）距下关节/距小腿关节的内翻-外翻方向并不总是距下关节方向的准确指标；（b）联合关节的外展-内收方向对距下关节方向的总体影响最大（因此，监测联合关节的内翻-外翻和外展-内收方向在预测旋前-旋后位置方面比仅监测内翻-外翻方向更有价值）；（c）应根据距下关节和距下关节/距小腿关节形态制定足部分类。与根据总体平均值进行预测相比，它们将为样本足部方向提供更准确的预测。
