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Minimally Invasive All-Inside Technique for ACL Tears

Anterior Cruciate Ligament Reconstruction

By Published On: December 21, 2020Last Updated: July 17, 20211268 words6.4 min read

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The Queen’s Medical Center
POB 1, Suite 808
1380 Lusitana Street
Honolulu, Hawaii 96813

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ACL Reconstruction2021-07-17T12:17:54-10:00

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  • Board-certified, Fellowship-Trained Knee Surgeon
  • Experienced Orthopedic Surgeon
  • Nonoperative and operative treatments available
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  • Minimally invasive surgery
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What is an Anterior Cruciate Ligament Tear?

The knee is composed of multiple ligaments, cartilage, and bones. One of the ligaments responsible for stabilizing the knee, the Anterior Cruciate Ligament, is also the most commonly injured ligament. Orthopedic surgeons can offer multiple treatment options based on the patient’s goals.

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All-Inside ACL Reconstruction
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The Anterior Cruciate Ligament and the Knee

The knee is a joint where different bones meet. The thigh bone, the femur, meets the two shin bones, the tibia, and the fibula. The patella is a small bone that sits on the front of the knee. The ends of the thigh and shin bones are covered in cartilage, which helps the bones glide smoothly while walking.

There are several ligaments that provide the entire joint with stability. The Anterior Cruciate Ligament, otherwise known as the ACL, is the most well-known. It prevents the shin bones from sliding forward. There is also a Posterior Cruciate Ligament, the Medial Collateral Ligament, and the Lateral Collateral Ligament. They provide stability for different parts of the knee.

The Anterior Cruciate Ligament

Causes of ACL Injury

Most people have heard of an ACL injury, often in a sports context. While it is true that most ACL injuries occur in athletic events, there are multiple mechanisms of injury. In an athlete, an ACL injury most commonly occurs while running or jumping and changing direction or pivoting that involves rotation and lateral bending of the knee. ACL injuries may also occur when the patient suffers a blow to the side of the knee. Lastly, ACL injuries can occur through high-energy impacts, like motor vehicle collisions.

People who have an ACL injury often feel a “pop”, have immediate swelling, and experience the sensation of an unstable knee. While they can often still walk, they have difficulty with other movements, like squatting or pivoting, that require more stability in the joint.

ACL Tear Diagnosis

When you come into the clinic, Dr. Morton will obtain an x-ray of your knee. This is to look for any other causes or injuries you may have sustained at the same time. After examination, he will evaluate if your knee feels unstable. Based on clinical exam, we will discuss whether you need to have an MRI performed to evaluate your injury. An MRI would also be able to look for other causes of your knee pain such as another ligament injury, cartilage injury, or meniscus tear.

Treatment for ACL Tears

Immediately after the injury, the first priority is rest, ice, compression, and elevation of the injured knee. Surgery need not happen immediately, and in fact often occurs a few weeks to months afterwards if the patient chooses surgery at all.

Non-Operative

There are some patients who may be better suited for non-operative treatment. Choosing whether to operate depends on the extent of the injury and the patient’s activities and goals. For example, if a patient is older, less active, and still retains a reasonable amount of function with their injury, non-operative management may be the best option. Often, this involves physical rehabilitation.

Operative

Surgery involves reconstructing the ligament itself. The surgeon does this through the use of grafts, meaning that they take another tendon and fashion it into a ligament. There are a variety of graft choices. Surgeons can take a tendon from the patient or from a donor. The two most common tendon grafts are either the patellar tendon or a tendon from the hamstring. The patellar tendon has the advantages of increased strength and better fixation to the bone. However, it may cause some more knee pain if taken from the patient. Using the hamstring causes less knee pain, can be very strong, but theoretically has slower fixation than the patellar tendon. Lastly, the surgeon can use a tendon from a donor. The advantage of the donor tendon is simply that using a donor avoids taking a tendon from the patient. The patient then does not experience the pain associated with using their own tendon. However, a donor tendon may integrate slower than a tendon taken from a patient. There is also the risk of infections from the donor.

Often there will be other co-existing injuries. Any injury to the meniscus, cartilage or other ligaments will be addressed at the time of surgery.

All-inside ACL Reconstruction

There are multiple techniques used in ACL reconstruction. The anatomic all-inside technique is a newer technique. By placing the ACL in an anatomic position, it is less likely to fail. The all-inside technique involves using specialized instruments that only drill on the “inside of the knee” and does not drill into the hard outer shell of the bone. The all-inside technique involves less bone removal and can be done with smaller skin incisions. Studies have shown that patients who undergo the all-inside technique have less knee pain compared to those who undergo the traditional technique. This is true as far out as 2 years postoperatively. Studies also show that the knee function scores and the joint anatomy outcomes are the same as the traditional method.

After surgery, patients have to undergo a significant period of physical rehabilitation. The rehab emphasizes joint mobility and strength. In patients who are hoping to return to sports, rehab may last as long as 9 months.

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Summary

The anterior cruciate ligament (ACL) is a commonly injured ligament in the knee that is vital for movement. There are nonoperative treatment options and surgical management options available. Surgery is tailored to each patient’s needs. There are multiple grafts a patient could choose from and multiple techniques a surgeon uses. The all-inside technique results in the least amount of pain while preserving the technical successes of the traditional approach. Ask Dr. Morton about your options in regard to having an ACL reconstruction surgery.

Frequently Asked Questions about Anterior Cruciate Ligament Tears (FAQ)

What does an ACL rupture feel like?2021-02-27T19:57:43-10:00

When you tear your ACL, patients often feel a sudden pop and their knee will give out from underneath them. Usually you will feel very unstable after the injury, as though your knee is “floppy”. Many patients will experience significant swelling and pain. The swelling and pain will gradually resolve. Without treatment, many patients continue to have discomfort and difficulty walking. It is important to see an orthopedic surgeon to make sure you have your knee addressed appropriately.

Can your ACL tear heal on its own?2021-02-27T19:54:31-10:00

Minor, partial tears may not cause your knee to feel unstable, and you may be able to function fine. Complete tears of your ACL will not heal without surgery. Unfortunately, the ACL is located in an area of the knee joint that it will not heal on its own. However, some patients who are lower demand can consider a rehabilitation program to strengthen their knee and successfully manage their ACL tear without surgery.

Can you delay your ACL surgery?2021-02-27T19:54:06-10:00

Patients who are less active may consider delaying their surgery if they have other obligations. However, patients who continue to perform high levels of activity are placing the cartilage and meniscus at risk for further injury. Further injury to the knee can lead to arthritis later in life.

Can you walk after an ACL tear?2021-02-27T19:53:50-10:00

Yes, you can walk. Often times the knee is very swollen after the injury. Once you recover from the initial injury, However, without an ACL patients sometimes feel unstable. Patients who are athletes or require the use of their knee for high demand activities that involve pivoting or jumping are more likely to desire an ACL reconstruction.

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Meet Dr. Paul Norio Morton

Dr. Paul Norio Morton, MD is a board-certified, fellowship-trained orthopedic surgeon in hip and knee surgery, specializing in robotic joint replacements, complex joint reconstruction, sports injuries, and trauma. Reach out to him to learn more about treatment options for your problem.

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Meet Dr. Paul Norio Morton

Dr. Paul Norio Morton, MD is a board-certified, fellowship-trained orthopedic surgeon in hip and knee surgery, specializing in robotic joint replacements, complex joint reconstruction, sports injuries, and trauma. Reach out to him to learn more about treatment options for your problem.

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The Queen’s Medical Center
Physician Office Building 1
Suite 808
1380 Lusitana Street
Honolulu, Hawaii 96813
USA

[email protected]

+1(808) 439-6201

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