单束重建；
单束重建前交叉韧带(ACL)时移植肌腱位于其胫骨、股骨止点的中点时最佳。
Anterior cruciate ligament (ACL) reconstruction can be optimized when single-bundle grafts are centered within the native ligament's tibial and femoral insertions.
目的分析比较关节镜下单束单隧道与双束股骨双隧道重建后十字韧带（PCL）术后的临床效果。
Objective To compare the clinical effects of the reconstruction with uni- and double-bundle for the posterior cruciate ligament (PCL) under arthroscopy.
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