Reconstruction of the Anterior Cruciate Ligament

The Anterior Cruciate Ligament (ACL) is one of four ligaments that stabilize the knee joint.

Tearing of the ACL is most often the result of violent twisting or hyper flexion of the knee, usually occurring during the practice of a "pivot" sport (skiing, football ...). This may occur for example when the foot is blocked and the rest of the body rotates, causing the ligament subject to this sudden twisting to tear with an audible crack.

Once it has been broken, the ACL does not heal spontaneously, instead shrinking in the majority of cases. However, such a breakage does not prevent the resumption of regular activities in daily life. Many people can live normally without their anterior cruciate ligament, but it may lead to instability of the knee during the practice of sports and may increase the risk of knee osteoarthritis if not surgically treated.

When treating ACL tears surgically, the objective is to reconstruct the torn ligament to restore knee stability. This is done by replacing the damaged ligament with tissues possessing the same properties, so that patients can recover their physical and athletic abilities. The replacement is typically a graft of tissue taken from:

  • the patellar tendon (one third, taken out with a small block of bone at each end): the KJ technique.
  • the hamstring tendons, which are accessory muscles lining the inside of the knee, specifically called the gracilis and the semitendinosus; these give the name to the most widely used technique: the doubled semitendinosus/gracilis autograft (DSTG).
  • the fascia lata, a fibrous partition on the side of the thigh.

The principle of these interventions is to reconstruct the ligament at its exact anatomical location. Without surgery, there is a risk of long-term knee osteoarthritis.

FDA cleared products for Anterior Cruciate Ligament reconstruction:


  Bioabsorbable interference screws

  Adjustable juxtacortical fixation for soft tissue and quadrupled ST grafts




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