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Different effects of the lateral meniscus complete radial tear on the load distribution and transmission functions depending on the tear site
Knee Surgery, Sports Traumatology, Arthroscopy ( IF 3.8 ) Pub Date : 2020-03-10 , DOI: 10.1007/s00167-020-05915-8
Tomoki Ohori , Tatsuo Mae , Konsei Shino , Hiromichi Fujie , Takehito Hirose , Yuta Tachibana , Hideki Yoshikawa , Ken Nakata

Abstract

Purpose

To compare the effect of the lateral meniscus (LM) complete radial tear at different tear sites on the load distribution and transmission functions.

Methods

A compressive load of 300 N was applied to the intact porcine knees (n = 30) at 15°, 30°, 60°, 90°, and 120° of flexion. The LM complete radial tears were created at the middle portion (group M), the posterior portion (group P), or the posterior root (group R) (n = 10, each group), and the same loading procedure was followed. Finally, the recorded three-dimensional paths were reproduced on the LM-removed knees. The peak contact pressure (contact area) in the lateral compartment and the calculated in situ force of the LM under the principle of superposition were compared among the four groups (intact, group M, group P, and group R).

Results

At all the flexion angles, the peak contact pressure (contact area) was significantly higher (lower) after creating the LM complete radial tear as compared to that in the intact state (p < 0.01). At 120° of flexion, group R represented the highest peak contact pressure (lowest contact area), followed by group P and group M (p < 0.05). The results of the in situ force carried by the LM were similar to those of the tibiofemoral contact mechanics.

Conclusion

The detrimental effect of the LM complete radial tear on the load distribution and transmission functions was greatest in the posterior root tear, followed by the posterior portion tear and the middle portion tear in the deep-flexed position. Complete radial tars of the meniscus, especially at the posterior root, should be repaired to restore the biomechanical function.



中文翻译:

取决于撕裂部位,侧弯液面的不同作用会完全影响径向撕裂对载荷的分布和传递功能

摘要

目的

为了比较侧弯液面(LM)在不同的撕裂位置处完成径向撕裂对载荷分布和传递功能的影响。

方法

 在15°,30°,60°,90°和120°屈曲的情况下,对完整的猪膝盖(n = 30)施加300 N的压缩载荷。在中部(M组),后部(P组)或后根(R组)(n  = 10,每组)产生LM完整的径向撕裂,并遵循相同的加载程序。最后,记录的三维路径被复制到LM移走的膝盖上。比较了四个组(完整组,M组,P组和R组)在横向隔室中的最大接触压力(接触面积)和在叠加原理下计算出的LM原位力。

结果

与完整状态相比,在所有LM弯曲角度下,LM完全径向撕裂后的峰值接触压力(接触面积)均显着较高(较低)(p  <0.01)。在120°屈曲时,R组代表最高峰值接触压力(最低接触面积),其次是P组和M组(p  <0.05)。LM施加的原位力结果与胫股接触力学的结果相似。

结论

LM完全径向撕裂对负荷分布和传递功能的有害影响在后根撕裂中最大,其次是在深屈位置的后部撕裂和中部撕裂。应修复半月板的完整放射状焦油,尤其是在后根处,以恢复生物力学功能。

更新日期:2020-03-10
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