Contact mechanics after mattress suture repair of medial meniscus vertical longitudinal tear: an in vitro study
Contact mechanics after mattress suture repair of medial meniscus vertical longitudinal tear: an in vitro study
复制标题
床垫缝合修复内侧半月板垂直纵向撕裂后的接触力学：一项体外研究
DOI：
10.1007/s00402-020-03428-0
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发表时间：
2020-04-18
影响因子：
2.3
通讯作者：
Li, Weiping
中科院分区：
文献类型：
--
作者：
Chen, Zhong;Zhang, Haozhi;Li, Weiping
目的大多数研究集中在胫股关节接触压力和面积的变化上。本研究比较了修复后的内侧半月板与完整或撕裂的内侧半月板下的接触力学。方法采用自制的材料试验机，在4种屈曲角度和4种加载条件下，对8例新鲜冷冻身体膝关节施加1000N的轴向压缩载荷。对完整的膝关节、内侧半月板垂直纵向撕裂的膝关节和半月板修复后的膝关节进行了测试。用富士压敏胶片测量半月板最大接触压力和半月板下面积。结果在所有实验生物力学条件下，内侧半月板垂直纵向撕裂与完整半月板相比，半月板下方接触压力显著增加，接触面积明显减小，修复后大部分情况下可恢复接触压力和接触面积。修复组膝关节中立位90°、60°、90°5N中心点m外旋、134N胫骨前移、5N中心点m内旋各屈角时的接触压力均显著高于或接近撕裂组。修复组接触压力异常所对应的接触面积小于完整半月板组。结论修复的内侧半月板垂直纵向撕裂修复后半月板下的接触力学性能较相应撕裂条件下有明显改善，但修复后某些状态下的接触压力和接触面积与相应撕裂条件下的接触压力和面积无明显差异。
Purpose Most studies have concentrated on the changes in contact pressure and area on the tibiofemoral joint. This study compared the contact mechanics underneath the medial meniscus of a repaired vertical longitudinal tear with that of the intact or the torn ones. Methods In this controlled laboratory study, a 1000 N compressive axial load was applied to eight fresh-frozen cadaveric knees at four flexion angles and four loading conditions using a custom testing apparatus attached to a material testing machine. Intact knees, knees with a medial meniscus vertical longitudinal tear, and knees after meniscal repair were tested. The peak contact pressure and area underneath the meniscus were measured using Fuji pressure-sensitive film. Results A medial meniscus vertical longitudinal tear significantly increased the contact pressure and decreased contact area underneath the meniscus compared with those at the intact meniscus under all tested biomechanical conditions, and repair of the tear can restore the contact pressure and area in most conditions. While the repaired group showed a significantly higher or similar contact pressure compared with the tear group at 90 degrees neutral knee position and at 60 degrees, 90 degrees 5 N center dot m-external rotation and 134 N-anterior tibial translation, and 5 N center dot m-internal rotation at all flexion angles. The contact area corresponding to the aberrant result of the contact pressure in the repaired group was lower than in the intact meniscus group. Conclusions The contact mechanics underneath the meniscus of the repaired medial meniscus vertical longitudinal tear were significantly improved compared with the corresponding tear conditions in most cases, while the contact pressure and area at some certain status after repair were not significantly different from those of the corresponding tear conditions.