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ACL Reconstruction and ACL Revision Surgery

ACL Reconstruction :: ACL Revision Surgery

ACL Revision Surgery

Introduction

ACL Revision SurgeryThe anterior cruciate ligament, or ACL, is one of the major ligaments of the knee that is located in the middle of the knee and runs from the femur (thigh bone) to the tibia (shin bone). When this ligament tears, it does not heal by itself and often leads to the feeling of instability in the knee. Therefore ACL reconstruction surgery becomes necessary.  In some people, a second surgery, ACL revision surgery which involves placement of new graft may be needed when ACL reconstruction failure occurs.


Function

The anterior cruciate ligament (ACL) prevents the femur from sliding backwards on the tibia or the tibia from sliding out in front of the femur. It is the major stabilizing ligament of the knee. Together with posterior cruciate ligament (PCL) it provides rotational stability to the knee.


History of Injury

ACL injury is sports related that occur when the knee is forcefully twisted or hyperextended. An ACL tear usually occurs with a rapid directional change with the foot fixed on the ground or when a deceleration force crosses the knee. Changing direction rapidly, stopping suddenly, slowing down while running, landing from a jump incorrectly, and direct contact or collision, such as a football tackle can also cause injury to the ACL.


Symptoms

When you injure your ACL, you might hear a "popping" sound and you may feel as though the knee has given out. Within the first two hours after injury, your knee will swell and you may have a buckling sensation in the knee during twisting movements. You may feel instability in the knee, particularly when trying to change direction of the knee.


Diagnosis

Diagnosis of an ACL tear is made by knowing your symptoms, medical history, performing a physical examination of the knee, and performing other diagnostic tests such as X-rays, MRI scans, stress tests of the ligament, and arthroscopy.

Treatment

Initial treatment consists of rest, ice, compression, and elevation (RICE protocol); all assist in controlling pain and swelling. Physical therapy may be recommended to improve knee motion and strength. A knee brace may be needed to help immobilize your knee.


Indications for surgery

  • Improper placement of drill holes
  • Failure of fixation of the graft
  • Graft impingement
  • Intrinsic graft failure
  • Arthrofibrosis (formation of scar tissue)
  • Trauma

Surgery

ACL Revision SurgeryBefore ACL revision surgery, the cause for failure must be identified through history, physical examination, and radiologic evaluation, including X-rays and, occasionally, magnetic resonance imaging (MRI) and computed tomography (CT). An ACL revision surgery needs more than one surgery. During the first surgery, the old screws are removed from the original holes that were drilled to attach the ligaments. Next any further damage is repaired and the tunnels are grafted with donor bone plugs. The second surgery is performed after healing of the bone grafts occur, during which the new holes are drilled and the actual ACL reconstruction is performed.


Post-operation

Following an ACL revision surgery, physical rehabilitation is similar to the initial ACL reconstruction, but may be lengthier and less aggressive. The results are less predictable than the initial surgery and it is very important to protect the reconstructed knee to allow it to heal.


MARS Study

Multicenter ACL Revision Study

David C. Flanigan MD - Sports Medicine, Knee Surgeon
David C. Flanigan MD - Sports Medicine, Knee Surgeon
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