The anterior symmetrical ligament (ACL) is that the major stabilising ligament of the knee that forestall os longum slippery anteriorly. The ACL is found within the center of the knee and runs from the thighbone (thigh bone) to the leg bone (leg bone), through the middle of the knee. it's important for daily activities like stepping, jumping and sports.

Currently, there's nice interest in reproducing the native anatomy once reconstructing the ACL [10,11]. there's dialogue concerning the requirement for double-bundle reconstruction. Double-bundle reconstructions are shown to enhance motility stability in vitro [12,13], however improved clinical outcomes haven't been incontestable [14,15]. With all techniques, the final word goal in ACL anaplasty is to revive the change of location and motility mechanics of the native knee. whether or not single- or double-bundle ACL reconstruction is performed, adherence to the anatomic reconstruction conception looks to be a very important think about achieving this goal
The SB reconstruction of the ACL victimisation the extensor muscle muscle graft together with the ALL reconstruction restores the IR stability of the knee to same extent as decibel reconstruction will. If the IR stability when the SB reconstruction achieves 12°, the ALL reconstruction is not any longer necessary