Newly designed anterolateral and posterolateral locking anatomic plates for lateral tibial plateau fractures: a finite element study.
Newly designed anterolateral and posterolateral locking anatomic plates for lateral tibial plateau fractures: a finite element study.
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DOI：
10.1186/s13018-017-0531-1
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发表时间：
2017-02-23
影响因子：
2.6
通讯作者：
Chen J
中科院分区：
文献类型：
--
作者：
Chen P;Lu H;Shen H;Wang W;Ni B;Chen J
锁定螺钉钢板固定胫骨外侧柱骨折比其他固定方法具有更高的机械稳定性。本研究的目的是介绍两种新设计的用于胫骨平台外侧骨折的锁定解剖板，并展示其在轴向载荷下的固定复合体的特性。创建了带骨板的胫骨外侧平台骨折的三种不同的 3D 有限元模型。施加各种轴向力（100、500、1000 和 1500 N）来模拟日常生活中成人膝盖上的轴向压缩载荷。输出位移和应力的等效图，并计算沿断裂线的相对位移。固定复合体中的位移和应力随着轴向力的增加而增加。不同轴向力作用下各固定点的等效位移或应力图表现出相似的分布特征。三种模型的运动特性不同，小梁最大剪应力随着轴向载荷的增加而增大。这两种新型钢板可以修复涉及前外侧和后外侧碎片的外侧胫骨平台骨折。应建议切开复位和稳定内固定后进行运动，以降低小梁微骨折的风险。使用前外侧钢板和后外侧钢板时，后外侧骨折块的相对位移是不同的，针对不同的后外侧平台骨折选择种植体时应考虑这一点。
Lateral column tibial plateau fracture fixation with a locking screw plate has higher mechanical stability than other fixation methods. The objectives of the present study were to introduce two newly designed locking anatomic plates for lateral tibial plateau fracture and to demonstrate their characteristics of the fixation complexes under the axial loads. Three different 3D finite element models of the lateral tibial plateau fracture with the bone plates were created. Various axial forces (100, 500, 1000, and 1500 N) were applied to simulate the axial compressive load on an adult knee during daily life. The equivalent maps of displacement and stress were output, and relative displacement was calculated along the fracture lines. The displacement and stresses in the fixation complexes increased with the axial force. The equivalent displacement or stress map of each fixation under different axial forces showed similar distributing characteristics. The motion characteristics of the three models differed, and the max-shear stress of trabecula increased with the axial load. These two novel plates could fix lateral tibial plateau fractures involving anterolateral and posterolateral fragments. Motions after open reduction and stable internal fixation should be advised to decrease the risk of trabecular microfracture. The relative displacement of the posterolateral fragments is different when using anterolateral plate and posterolateral plate, which should be considered in choosing the implants for different posterolateral plateau fractures.