Suckel A, Muller O, Langenstein P, Herberts T, Reize P, Wulker N
Orthopaedic Department, Tubingen University Hospital, Hoppe-Seyler Strasse 3, 72076 Tubingen, Germany.
Gait Posture. 2008 Feb;27(2):216-22. doi: 10.1016/j.gaitpost.2007.03.010. Epub 2007 Apr 27.
Chopart's joint is fundamental to foot function. Until today, intra-articular force and peak pressure has not been investigated under dynamic conditions.
The study used a cadaver model to measure intra-articular force and peak pressure with electronic sensors. Force was applied to extrinsic tendons via cables attached to computer-regulated hydraulic cylinders. A ground reaction force of 350 N was simulated in a tilting angle- and force-controlled translation stage.
We observed a characteristic rising curve with a peak during push-off for intra-articular force and peak pressure. The increase of intra-articular force at the talonavicular and calcaneocuboid joint from a low level at heel-on varies up to a maximum of 174 N/149 N and a peak pressure of 3877 kPa/3396 kPa, respectively, at push-off. We observed highest loading at the dorsal aspect of the talonavicular joint and the plantar aspect of calcaneocuboid joint.
The highest loading on Chopart's joint is attained during push-off. We observe higher force and peak pressure on the medial column of the foot compared to the lateral column. The higher load of the dorsal aspect of talonavicular joint and plantar aspect of calcaneocuboid joint confirms the theory of a previous described locking mechanism for forceful push-off.
Chopart关节对于足部功能至关重要。直至今日，尚未对动态条件下的关节内压力和峰值压力进行过研究。
本研究使用尸体模型，通过电子传感器测量关节内压力和峰值压力。通过连接到计算机控制液压缸的缆绳对外在肌腱施加力。在倾斜角度和力控制的平移台上模拟350N的地面反作用力。
我们观察到关节内压力和峰值压力在蹬离期呈现出特征性的上升曲线并达到峰值。距舟关节和跟骰关节的关节内压力从足跟触地时的低水平开始增加，在蹬离期分别最高可达174N/149N，峰值压力分别为3877kPa/3396kPa。我们观察到距舟关节背侧和跟骰关节足底侧承受的负荷最高。
Chopart关节在蹬离期承受的负荷最高。我们观察到足部内侧柱相比外侧柱承受更高的压力和峰值压力。距舟关节背侧和跟骰关节足底侧更高的负荷证实了先前描述的强力蹬离锁定机制理论。
