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 po...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.展开更多
文摘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.
