Institute for Biomechanics, BG Unfallklinik Murnau gGmbH, Prof. Küntscher 14 Str. 8, 82418 Murnau, Germany; Institute for Biomechanics, Paracelsus Medical University Salzburg, Strubergasse 21, 5020 Salzburg, Austria.
Institute for Biomechanics, BG Unfallklinik Murnau gGmbH, Prof. Küntscher 14 Str. 8, 82418 Murnau, Germany; Institute for Biomechanics, Paracelsus Medical University Salzburg, Strubergasse 21, 5020 Salzburg, Austria.
Foot Ankle Surg. 2022 Oct;28(7):845-851. doi: 10.1016/j.fas.2021.11.006. Epub 2021 Nov 18.
A common agreement for the surgical treatment of osteoporotic ankle fractures has not been defined yet although locking plates are preferred for fractures with poor bone quality. This study aims to evaluate the mechanical stability of locked and conventional plates on osteoporotic Danis-Weber-B-fibula fracture models. Fractured custom-made osteoporotic fibulae were treated with neutralization plate plus lag screw, locking plate plus lag screw, or a standalone locking plate. Load until failure was applied mimicking single-leg stance. Stiffness, failureload, and interfragmentary movements were investigated. Stiffness, failureload and axial fragment movement showed no significant differences among groups. Shear movements and fragment rotation around the shaft of the neutralization plate were on average twice as high as those of the locking plates. Although no superiority was shown for overall mechanical performance, the locking plate groups exhibited higher shear and rotational stability than the neutralization plate.
尽管锁定板更适合骨质量差的骨折，但对于骨质疏松性踝关节骨折的手术治疗还没有达成共识。本研究旨在评估锁定板和常规板在骨质疏松性 Danis-Weber-B 型腓骨骨折模型中的机械稳定性。采用中和板加拉力螺钉、锁定板加拉力螺钉或单独的锁定板治疗定制的骨质疏松性腓骨骨折。应用类似于单腿站立的载荷直至失效，以测量刚度、失效载荷和断端间的活动度。各组间刚度、失效载荷和轴向断端活动度均无显著差异。中和板的剪切运动和围绕骨干的断端旋转运动平均是锁定板的两倍。尽管在整体力学性能方面没有表现出优越性，但锁定板组的剪切和旋转稳定性高于中和板。
