In vitro study of knee stability after two-band two-tunnel posterior cruciate ligament reconstruction

客观：在从 0 °恢复胫骨和膝关节的以后的稳定性的以后的排水量到 120 °屈曲比较三个不同重建过程的能力。方法：三个以后的十字形的系带(打印机控制语言) 重建过程被执行的、也就是二乐队的二隧道的重建，一个乐队前面的隧道重建和一个乐队以后的隧道重建。当时，在与腿节的关系的胫骨的以后的排水量被测量 200N 以后的力量被使用。结果：在到 30 °的 0 °的屈曲范围以内，在以后的隧道重建显示出的一个乐队的排水量从未经触动的膝的小差别(P 】 0.05 ) 。但是当屈曲超过了 30 °时，特别当它超过了 60 °时，在一个的排水量 -- 乐队以后的隧道重建比未经触动的膝的大得多(P 【 0.01 ) 。在二乐队的二隧道的重建 andone 乐队前面的隧道重建，排水量近似从 0 °与未经触动的膝的一样正在到 120 °(P 】 0.05 ) ，当细微在限制上可能在一些角度被发现时。结论：二乐队的重建能有效地限制胫骨的以后的排水量并且在它屈曲的完整的范围以内恢复膝关节的前面的、以后的稳定性。一个乐队前面的隧道重建能也维持膝的以后的稳定性，当时一个乐队的结果以后的隧道重建最不能令人满意。

To compare the ability of three different reconstruction procedures in restoring the posterior displacement of tibia and the posterior stability of the knee joint from 0° to 120°flexion. Methods ： Three posterior cruciate ligaments （PCL） reconstruction procedures were performed, namely two-band two-tunnel reconstruction, one-band anterior tunnel reconstruction and one-band posterior tunnel reconstruction. The posterior displacement of the tibia in relation to the femur was measured when a 200N posterior force was applied. Results： Within the flexion range of 0° to 30°, the displacement in the one-band posterior tunnel reconstruction showed little difference from that of an intact knee （P〉0.05）. But when the flexion exceeded 30°, especially when it exceeded 60°, the displacement in oneband posterior tunnel reconstruction was much greater than that of an intact knee （P〈0.01）. In two-band two-tunnel reconstruction and one-band anterior tunnel reconstruction, the displacement was approximately the same as that of an intact knee ranging from 0° to 120° （P〉0.05）, while a slight over-restriction might be found at some angles. Conclusions： Two-band reconstruction could effectively restrict the posterior displacement of the tibia and restore anterior, posterior stability of the knee joint within its full range of flexion. One-band anterior tunnel reconstruction also could maintain the posterior stability of the knee, while the result of one-band posterior tunnel reconstruction is the most unsatisfactory.