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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
365 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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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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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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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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Post ACL surgery and my knee feels loose, what should I do?

Post ACL surgery and my knee feels loose, what should I do?

Check with surgeon.: Check with your surgeon. A "loose " feeling can indicate that something happened to the ACL graft, or your quad muscles may be under-rehabbed. Read more

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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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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

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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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Hello, I had a acl surgery on my left knee two months back, so can I drive a manual car now?

Hello, I had a acl surgery on my left knee two months back, so can I drive a manual car now?

Speed Shifting...: Well, I wouldn't be shifting gears so fast without consulting with the surgeon first. You don't want to be popping the clutch or anything else, before you get rolling. Read more

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I have a sharp knee pain below knee 3.5 weeks after ACL reconstruction surgery. Is this normal?

I have a sharp knee pain below knee 3.5 weeks after ACL reconstruction surgery. Is this normal?

Surgical site: This may be at the surgical site. See your surgeon to clarify this pain. Read more

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What to do if I'm now 8 months out of ACL surgery and the knee that I had surgery on cracks frequently, what is this?

What to do if I'm now 8 months out of ACL surgery and the knee that I had surgery on cracks frequently, what is this?

Scar tissue.: It could be some scar tissue that formed after surgery, or it can be the tracking of your kneecap. Check with your surgeon, for a specific diagnosis, as to what's causing the cracking. Read more

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If you get a single bundle ACL surgery on one knee and a double bundle ACL surgery on the other could this cause any harm to the body?

If you get a single bundle ACL surgery on one knee and a double bundle ACL surgery on the other could this cause any harm to the body?

No harm: You would be an interesting case control study to compare differences, but there is a chance that both would function equally well. Both techniques can result in success, and therefore, you might not expect any difference or harm. Since you know which knee had which tech., comparison may be biased. Read more

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Had ACL surgery a couple years ago can't put any weight on kneeand when knee is flexed a bunch of cracking n poppin n sum pain comes with it?

Knee pain after ACLU: If you had a patella tendon bone-tendon-bone autograft it is possible to develop patellar chondromalacia (cartilage deterioration on back of kneecap). You should consult with your surgeon fo further evaluation. Read more

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I had ACL surgery about a year ago. Yesterday, my knee gave out the worst it has, I am in constant pain and it is still giving out today. What is this?

I had ACL surgery about a year ago. Yesterday, my knee gave out the worst it has, I am in constant pain and it is still giving out today. What is this?

Recurrent injury: Acl surgery does not guarantee that the reconstructed ligament will not tear again. If you have significant instability you need to be reexamined by your treating physician. Read more

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How to prevent knee pops after ACL surgery?

How to prevent knee pops after ACL surgery?

Strengthen: Physical therapy to strengthen the surrounding muscles. If persists need to see the surgeon who did the surgery. 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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What is the best wa6 to restrengthen a knee that has undergine ACL surgery?

What is the best wa6 to restrengthen a knee that has undergine ACL surgery?

ACL exercises: If the rest of the knee is healthy then squats are the single best exercise to rebuild knee strength after an acl. Read more

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