Background

This study aims to analyze the ligaments of the dorso-lateral calcaneo-cuboid joint and to assess the biomechanical relevance of the bifurcate ligament.

Methods

16 specimens were analyzed for their ligamentous anatomy of the dorso-lateral calcaneo-cuboid joint and side-alternating assigned to two groups with varying ligamentous dissection order. The Chopart joint was stressed in plantar, medial, and lateral direction measuring the displacement by an 3D motion tracker for every dissection step.

Results

37.5% of specimens had all ligaments (lateral calcaneo-cuboid, dorsal calcaneo-cuboid, bifurcate calcaneo-cuboid, bifurcate calcaneo-navicular), 37.5% were lacking bifurcate´s calcaneo-cuboid-portion, and 25% presented without dorsal calcaneo-cuboid. Biomechanical testing revealed no significant displacement within the calcaneo-cuboid or talo-navicular joint for any stressed state except for axial compression with dissected dorsal talo-navicular joint capsule in Group 2.

Conclusion

Broad morphological variability and missing significant displacement regardless of its integrity, make the bifurcate ligament appear of limited biomechanical relevance.

中文翻译：

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外侧跟骨-长方体和分叉韧带的解剖学和生物力学评估

背景

本研究旨在分析背外侧跟骨-骰骨关节的韧带，并评估分叉韧带的生物力学相关性。

方法

对 16 个标本进行了背外侧跟骨-长方体关节的韧带解剖分析，并侧交替分配到具有不同韧带解剖顺序的两组。Chopart 关节在足底、内侧和外侧方向受到压力，通过 3D 运动跟踪器测量每个解剖步骤的位移。

结果

37.5% 的样本具有所有韧带（外侧跟骨-长方体、背侧跟骨-长方体、分叉跟骨-长方体、分叉跟骨-舟骨），37.5% 的样本缺乏分叉的跟骨-长方体部分，25% 的样本没有背侧跟骨-长方体。生物力学测试显示，除​​了第 2 组中解剖的背侧距舟关节囊的轴向压缩外，在任何应力状态下，跟骨-长方体或距舟关节内没有明显位移。

结论

广泛的形态变异性和无论其完整性如何都缺少显着位移，使分叉韧带的生物力学相关性显得有限。