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Knee

ACL Reconstruction

ACL reconstruction is a surgical procedure used to restore stability to the knee after a tear of the anterior cruciate ligament, commonly known as the ACL. The ACL is one of the key ligaments inside the knee joint. It connects the thigh bone (femur) to the shin bone (tibia) and plays a critical role in controlling forward movement and rotation of the knee.

When the ACL is torn, the knee often becomes unstable. Patients may experience the knee “giving out,” especially during activities that involve cutting, pivoting, or sudden changes in direction. ACL reconstruction is designed to replace the damaged ligament with a new one, allowing the knee to function more normally again.

Unlike some injuries that can heal on their own, generally the ACL does not reliably repair itself once torn. Reconstruction is not a repair of the original ligament. Instead, Dr. Gazzaniga creates a new ligament using a graft – a piece of tissue that acts as a substitute for the damaged ACL.

ACL reconstruction is not necessary for every ACL tear. The decision to proceed with surgery depends on several factors, including the patient’s activity level, symptoms, overall knee stability, and personal goals.

Surgery is most commonly recommended for individuals who want to return to sports or activities that involve cutting, pivoting, or rapid changes in direction. Athletes involved in sports such as soccer, basketball, football, and skiing often require a stable knee to perform safely and effectively. Without reconstruction, the risk of repeated instability and further injury remains high.

ACL reconstruction is also considered for patients who experience ongoing knee instability during everyday activities. Even outside of sports, some individuals find that their knee gives way during walking, climbing stairs, or turning. Persistent instability can interfere with daily life and lead to additional damage within the joint.

Another important consideration is the presence of associated injuries. ACL tears are often accompanied by meniscus tears or cartilage damage. In these cases, reconstruction may be recommended to protect the knee from further deterioration and to support the healing of other structures.

Age alone is not the deciding factor. Active individuals of all ages may benefit from ACL reconstruction if they have functional instability and want to maintain an active lifestyle. On the other hand, patients with lower activity demands who do not experience instability may be managed without surgery.

Non-surgical treatment typically involves physical therapy focused on strengthening the muscles around the knee, improving balance, and enhancing overall joint stability. Some patients can function well without an ACL, particularly if they avoid high-risk activities. However, this approach requires careful consideration and realistic expectations.

ACL reconstruction is typically performed using minimally invasive arthroscopic techniques. Small incisions are made around the knee, and a camera is inserted to allow Dr. Gazzaniga to see inside the joint. Specialized instruments are used through additional small openings to perform the reconstruction.

The first step involves evaluating the knee joint. Dr. Gazzaniga examines the extent of the ACL tear and looks for associated injuries, such as meniscus tears or cartilage damage. These issues are often treated at the same time.

Once the damaged ACL is addressed, attention turns to the graft. The graft may come from the patient’s own tissue or from a donor source. Common options include the patellar tendon, hamstring tendon, or quadriceps tendon. The choice depends on patient-specific factors, activity level, and surgical preference.

After the graft is prepared, he creates small tunnels in the femur and tibia. These tunnels are precisely positioned to match the natural attachment points of the original ACL. The graft is then passed through these tunnels and positioned within the knee joint.

Fixation devices, such as screws or suspensory anchors, are used to secure the graft in place. This ensures the graft remains stable while it heals. Over time, the body incorporates the graft, and it gradually transforms into a structure that functions similarly to a native ligament.

Once healed, the reconstructed ACL helps prevent excessive forward movement of the tibia and limits abnormal rotation. This is essential for activities such as running, jumping, and changing direction. Without a functioning ACL, the knee can feel unstable and unpredictable, increasing the risk of additional damage to structures like the meniscus or cartilage.

ACL reconstruction also plays an important role in long-term joint health. Repeated instability episodes can lead to progressive wear and tear inside the knee. A stable knee allows patients to move with confidence, reduce the risk of further injury, and return to their desired level of activity.

Typically, Dr. Gazzaniga can perform this surgery in about an hour or less. Most patients go home the same day. After the procedure, the focus shifts to rehabilitation, which is a critical component of recovery.

Recovery from ACL reconstruction is structured and progressive. Early stages focus on reducing swelling, restoring range of motion, and protecting the graft. As healing progresses, strengthening exercises are introduced, followed by more advanced training to restore stability, coordination, and function.

Returning to sports or high-level activity takes time. In most cases patients will be release back to full activity at about 9-12 months. Rushing the process increases the risk of re-injury, so adherence to a structured rehabilitation program is essential.

ACL reconstruction has a strong track record of success in restoring knee stability and allowing patients to return to active lifestyles. Most individuals experience significant improvement in function and confidence in their knee.

While reconstruction restores stability, it does not eliminate all risk. Patients must remain mindful of proper training, conditioning, and injury prevention strategies moving forward.

ACL reconstruction is a highly effective solution for restoring knee function after a ligament tear. When performed for the right patient and followed by appropriate rehabilitation, it allows individuals to regain stability, reduce pain, and return to the activities that matter most.

When you or a loved one suffers a knee injury, contact Dr. David Gazzaniga to schedule a consultation. His goal is to get you back to the life you love. His expertise and compassion will take you there.

At a Glance

Dr. David Gazzaniga

  • Over 25 years of experience caring for professional athletes in the NHL, NFL, MLB, and the Olympics.
  • Division Chief of Sports Medicine at the Hoag Orthopedic Institute
  • Board-certified with a Certificate of Added Qualification (CAQ) in Sports Medicine and triple fellowship-trained
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