The effects of adult acquired flatfoot deformity on tibiotalar joint contact characteristics
The effects of adult acquired flatfoot deformity on tibiotalar joint contact characteristics
复制标题
DOI：
10.1177/107110070102200312
复制
发表时间：
2001-03-01
影响因子：
2.7
通讯作者：
Brage, ME
中科院分区：
文献类型：
--
作者：
Friedman, MA;Draganich, LF;Brage, ME
利用8具新鲜冷冻尸体踝关节标本研究胫距接触特征的变化，以进一步建立获得性扁平足畸形的模型。通过切割踝关节和足部的肌腱和韧带来模拟畸形，这些肌腱和韧带通常支撑纵向足弓。在完整标本和扁平足模型中，在中立位置向足部施加1，350 N的轴向载荷。扁平足条件导致整体接触面积显著侧向移位5.28 mm，峰值压力位置显著侧向移位11.26 mm，整体接触面积显著向后移位1.14 mm。扁平足条件也导致接触面积显著减少35%。还发现平均压力显著增加14%，峰值压力显著增加13%，但与接触面积相对较大的减少不成比例。这表明负荷从距骨顶转移。外侧关节面和腓骨的负荷可能增加。接触区域的侧向移位导致平均接触压力局部增加，这可能是该畸形患者长期退行性变化的原因。
Changes in the tiblotalar contact characteristics were investigated using eight fresh frozen cadaver ankle specimens to further develop an established model of the acquired flatfoot deformity. The deformity was simulated by sectioning the tendons and ligaments of the ankle and foot that normally support the longitudinal arch. Axial loads of 1,350 N were applied to the foot in a neutral position in both the intact specimen and flatfoot model. The flatfoot condition resulted in significant lateral shifts of 5.28 mm in global contact area and 11.26 mm in the location of peak pressure, and in a small but significant posterior shift of 1.14 mm in global contact area. The flatfoot condition also resulted in a significant, 35%, reduction in contact area. Significant increases in mean pressure, 14%, and peak pressure, 13%, were also found, but were not in proportion to the relatively large decrease in contact area. This suggests a transfer of load off of the talar dome. Increased loading of the lateral facet and fibula are suspected. The lateral shift in the contact region created a local increase in mean contact pressure that may be responsible for long term degenerative changes in patients with this deformity.