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Doctor insights on: Knee Popping After Acl Surgery

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Non painful knee popping 2 weeks after acl surgery. Is this normal?

Non painful knee popping 2 weeks after acl surgery. Is this normal?

Probably: Painless popping of the knee, even after surgery (including ACL surgery), is rarely a sign of any abnormality. ...Read more

Dr. Allen Lu
349 doctors shared insights

Acl Reconstruction (Definition)

Because an acl (anterior cruciate ligament) cannot heal itself on its own, an acl is "reconstructed" by placing a graft tendon substitute (from your own or donor cadaver tendon) placed into tunnels made in the original acl position, and fixed in place with screws, buttons, or other fixation device. The body then replaces the cells and structure of the graft over 6-8 months, ...Read more


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Is it common to have some popping in your knee after ACL surgery? It's been 3 weeks since surgery. The popping feels like I'm popping my knuckles.

Is it common to have some popping in your knee after ACL surgery? It's been 3 weeks since surgery. The popping feels like I'm popping my knuckles.

Popping in knee : It is a common occurrence for people to feel and hear snapping and popping in the knee. After ACL surgery your quadricep tendon becomes very weak and when this occurs your kneecap does not track as well in the groove of your knee . This makes it easy to hyperextend the knee and get this popping to occur. This will improve as your motion and quad gets stronger. Scar tissue also contributes to this. ...Read more

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I am 4 weeks out from ACL surgery and my knee has been popping. Should I be concerned?

I am 4 weeks out from ACL surgery and my knee has been popping. Should I be concerned?

Orthopedic surgeon: I believe that you should notify your orthopedic surgeon about this symptom as he/she would want to know of any postoperative discomfort. ...Read more

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My knees popping after ACL and meniscus surgery. It doesn't hurt but sometimes i loose balance. Did I have a re tear?

My knees popping after ACL and meniscus surgery. It doesn't hurt but sometimes i loose balance. Did I have a re tear?

Need knee evaluation: There are a number of possible causes of knee "popping" and a feeling of loosing balance. Your doctor should evaluate your knee to determine the exact cause. If you didn't have an injury to the knee, you probably didn't re-tear the acl. ...Read more

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Difficulty bending knee after ACL surgery - is that supposed to happen?

Difficulty bending knee after ACL surgery - is that supposed to happen?

Very common : Very common you'll require extensive rehab treatments and it won't feel like your regular leg for at least a year. ...Read more

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Problems with knee instability a year after ACL surgery. What should I do?

Problems with knee instability a year after ACL surgery. What should I do?

ACL: Instability after acl reconstruction can be for a number of reasons. Such as non healed meniscus repair, hardware failure, even simply lack of strength. I would see our orthopedist or seek a second opinion if your knee remains unstable despite surgery. ...Read more

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What to do about sharp knee pain below knee 3 1/2 weeks after ACL reconstruction surgery?

What to do about sharp knee pain below knee 3 1/2 weeks after ACL reconstruction surgery?

Pain is expected: After the surgery, but it is expected to decrease gradually, and if not - make sure you follow your doctor's advice. ...Read more

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After ACL surgery a few years ago I started experiencing my knee locking up. Any advice?

After ACL surgery a few years ago I started experiencing my knee locking up. Any advice?

Reconsult: I would go back and see the surgeon who performed your surgery first. It that is not possible i would go see another orthopedic surgeon. It may be from the previous surgery or it may be a new injury. ...Read more