跟骰关节固定对距下关节负重区的影响及其临床意义

Effect of calcaneocuboid joint arthrodesis on weight-bearing area of subtalar joint and its clinical significance:a cadaveric study

目的探讨跟骰关节固定对距下关节负重区面积的影响程度及其临床意义。方法选取12侧新鲜尸体足标本,通过胫骨干轴向动态加载,应用压敏片测量比较跟骰关节固定前后,在大体足中立位、背屈跖屈、内收外展、内翻外翻运动中,距下关节负重区面积。结果跟骰关节固定后,在大体足不同运动状态下距下关节负重区面积较术前均不同程度增大(P＜0．05),为(32．54±7．45)%。结论跟骰关节固定可增加距下关节负重区面积,从而降低距下关节面单位面积的应力及增加距下关节稳定性。

Objective To discuss the effect of the calcaneocuboid joint arthrodesis on the weightbearing area of subtalar joint and its clinical significance. Methods Twelve fresh-frozen cadaver foot specimens were used for determination of weight-bearing area of the subtalar joint on foot and ankle neutral position, dorsiflexion, plantoflexion, adduction, abduction, inversion and eversion motion by means of pressure sensitive film before and after calcaneocuboid joint arthrodesis under weight loading. Results Weight-bearing area of the subtalar joint averagely increased for （ 32.54 ± 7.45 ） % in all positions after calcaneocuboid joint arthrodesis, with statistical significance （ P 〈 0.05 ）. Conclusion Weight-bearing area of the subtalar joint increases after calcaneocuboid joint arthrodesis, which contributes to decreasing the pressure and increasing the stability of the subtalar joint.