Meniscus Surgery Failure? The Evidence Mounts…

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meniscus surgery failure

It seems like meniscus surgery has become a modern rite of passage for active people. A middle-aged person gets knee pain while doing something active, and sometimes a pop or shift is felt. The knee swells and becomes painful, and activity is difficult. An MRI shows a meniscus tear, and surgery ensues. Is the problem fixed, or are the real problems just beginning? For many patients a meniscus surgery failure is common, and the next step is often knee replacement. Is this all the standard of care or the biggest medical misadventure since snake oil? A new study adds evidence that this rite of passage is not helping patients, but is actually making them more likely to get arthritis.

What Is a Meniscus, and Is a Tear Important?

The knee has cartilage that covers the end of the bones. This biologic cushion is tough, but also vulnerable under the wrong circumstances. The meniscus is an added shock absorber that helps to protect the cartilage. At first blush it would seem that a tear in this structure would be a real problem, reducing the ability of the meniscus to guard against cartilage loss. There is some truth in the assertion that a torn meniscus is less able to do its job. However, there’s one problem with operating on the meniscus—removing parts of it makes the wear-and-tear forces worse.

Before we get into what surgery does to the knee joint, let’s spend some time reviewing whether meniscus tears are important at all. That meniscus tear seen on MRI in a middle-aged man or woman is a story that happens hundreds of thousands of times a year in the U.S. What if the tear seen on MRI was mostly a red herring?

It’s hard for patients to get their heads around the fact that a meniscus tear seen on MRI may have been there long before their knee began hurting and that their buddies who don’t have knee pain also likely have meniscus tears on their MRIs. However, this is true based on a number of big studies. So that meniscus tear that the surgeon convinced you was the cause of your knee pain and swelling likely isn’t. The bottom line: meniscus tears are as common as wrinkles and likely just as meaningful.

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Meniscus Surgery is Bad News

Many patients believe that meniscus surgery involves a repair of the torn structure. Nope. More than 9 times out of 10, what’s really being done is that the torn meniscus piece is removed. So while the torn meniscus may be less efficient in helping protect the cartilage, removing a part of the meniscus makes matters even worse!

Many prior studies have shown that meniscus surgery increases the loads on the cartilage, leading to more wear and tear. Now a new study continues to add to that body of literature that this common surgery is bad news for most patients.

The New Research Shows What Happens after Surgery

The new research looked at patients before and after a partial meniscectomy surgery—the most common elective orthopedic surgery in America. What was unique about this study was that it wasn’t just another cadaver study looking at what happens in simulated surgeries, it was an actual 3D gait analysis of real patients.

What did they find? Just as predicted by other studies, the forces on the knee cartilage went up after surgery. Given that these patients had a meniscus tear that needed surgery at the first gait-analysis measurement and then had the same knee measured after the surgery, the increase in forces is very concerning. The whole point of the surgery is to get rid of the pain and make the knee function better. Given that other studies have shown that meniscus surgery is no better than a placebo procedure in relieving pain, the fact that it made the function of the knee worse is a double whammy!

The upshot? Outside of a knee that locks frequently and is nonfunctional, the research shows that knee meniscus surgery is a really bad idea. This hasn’t stopped hundreds of thousands of these procedures a year, but as the evidence continues to mount that the procedure is hurting patients, at what point do insurance companies decide to no longer cover this expensive boondoggle? In the meantime, rather than cutting our torn pieces, we’ll continue to use precise injections of the patient’s own stem cells and platelets to help the problem.

To find out if you might be a candidate for a Regenexx stem cell procedure, complete our Regenexx Procedure Candidate Form online.

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This blog post provides general information to help the reader better understand regenerative medicine, musculoskeletal health, and related subjects. All content provided in this blog, website, or any linked materials, including text, graphics, images, patient profiles, outcomes, and information, are not intended and should not be considered or used as a substitute for medical advice, diagnosis, or treatment. Please always consult with a professional and certified healthcare provider to discuss if a treatment is right for you.

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21 thoughts on “Meniscus Surgery Failure? The Evidence Mounts…

  1. Diane

    thankis for this post. I have had one PRP injection. It has decreased the pain by about 50%. Three weeks have passed. Do many people need a second injection?

    1. Regenexx Team Post author

      In general terms, 3 weeks is still quite early. If at 6-8 weeks you don’t see more improvement, contact the doctor who treated you. You might need another injection, or perhaps stem cells might be needed. What were you being treated for? Was it a Regenexx PRP injection? If not, what color was the PRP? This contains more info on PRP, don’t be concerned about the title :)

  2. Mary

    Can not afford. Would do if insurance paid. Location in another city.

    1. Regenexx Team Post author

      The insurance issue is something we have no control over. One thing that could help would be for people to contact their insurance companies and demand coverage for stem cell treatments. If enough people flag up the issue, it will at least bring it to their attention.

  3. Rich DeLucia

    I did the knee 3 step procedure Aug 2015 I’m in my 6 month, I’m now exercising more aggressively and do over 5 miles on various equipment without pain. Well worth the cost even without insurance.

    1. Regenexx Team Post author

      Wonderful news! Thanks for the update, and keep us in the loop.

  4. David

    Does the 3 step procedure damage the remaining cartilage in the knee?

    1. Regenexx Team Post author

      No, not at all. Each step is designed to maximize regenerative potential.

  5. Bob Eb

    I had both knees scoped (2005, 2009) for partial tears. It alleviated the pain and allowed me to run again. I’ve gone more to cycling but have been running some in the past 9 months with some knee pain beginning to develop. What might you suggest to avoid more surgery?

    1. Regenexx Team Post author

      As it said in the blog, meniscus surgery actually increases forces in the knee. These additional forces and the instability that removing pieces of the meniscus cause lead to arthritis. Treating your knees with autologous biologics like your own stem cells or platelets is the best way to treat the problem rather than adding to it: This link will lead to a bevy of other studies and articles on this subject:

  6. Jo

    I had meniscus surgery 4 years ago on my left knee and wish I hadn’t. The inflammatory response that the surgery caused, left me in terrible pain and I have been suffering ever since. No amount of diclofenac would help, and neither did a subsequent cortisone injection. I was offered Percocet, but don’t want to go down that road. I am certain that I have a tear in the right knee meniscus now, but am not going near the surgeon. Better to tough it out and see what happens. I also have arthritis in both knees.

    I live in Canada, and unfortunately your treatments are not available to me here. Some places offer PRP injections, but I am not sure how reputable they are, and of course insurance doesn’t cover it here either.

    Thank you for your articles. I find them very informative.

    1. Regenexx Team Post author

      Glad you’ve found the articles to be informative! While supplements aren’t a substitute for treatment, a good Curcumin Complex would likely help with the pain.

    2. Regenexx Team Post author

      Glad you’ve enjoyed the articles! Really glad you stopped the Diclofenac and had only one Cortisone Shot. It’s advisable to keep off NSAIDS as they reduce the body’s ability to heal, as well as have serious cardiac and other risks. Cortisone Shots even more so as they can drastically escalate the situation as they hammer stem cells and damage tissue. Good supplements can help without any of the risks, and are included in the links:

  7. Robyn Gates

    I too have had the scope on March 15, 2017 on my left knee — I really have not had relief from pain or swelling. Physical therapy was no help. I then found out I also,after my fall,I had torn my right knee as well, reason why initially I had pain and swelling in both knees. The left one was worse so that one was take care of first. I have not had surgery on the right. Nothing works pain pills, can”t take any noninflammatory medication seems I am allergic to most – just wonderful. I have been suffering with pain and swelling trying to work on restrictions -had to give up my second job,too physical, my primary restrictions. End result taking Tramadol as needed every six hours, I suffer most of the time, scared to take. I don’t want to become addicted to it. I had a cortisone injection in left knee October 2017 – hurt like I’ll leave it at that. All that has done is cause more pressure and pain -I already have fluid behind both knees. They put the injection right into the incision area. Now reading what your report wondering if more damage will be done as the result of that injection? Had MRI found that I do not have evidence of a new tear in left knee but a cyst where the tear was was and now wear or damage to the subchondryl area of my knee. That is already showing on my right knee because I did not have surgery on that knee and living with both knees in pain and wondering if what you saying will help. I am going to further investigate your web page and ask my ortho surgeon about doing this instead of surgery. At this point from other information I have read I am looking at down the road both knees being replaced -I am only 49 years old — not ready to have knee replacement times 2 just yet but really the pain? I am an active person.

    1. Regenexx Team Post author

      Knee replacement should always be the last resort after all more conservative measures have been tried, as they are irreversible. Both Meniscus tears and Baker’s cysts are things we treat regularly, and many of our knee patients have had prior surgery. Importantly, the type of injections to avoid are steroid injections as they breakdown cartilage, can damage tendons and kill the local stem cells already struggling to repair. If you’d like to discuss your particular case with one of our physicians, please submit the Candidate form to the right of the blog.

  8. Khalid

    I had a bucket handle meniscus tear of my medial meniscus while playing badminton.I had my partial menisectomy surgery and half of my meniscus was removed.I am currently 25 years but i still have stiffness in my knee and weakness also.Can i opt for stem cell procedure?

    1. Regenexx Team

      Hi Khalid,
      For future reference please see: and We regularly treat patients post meniscectomy. The type of treatment needed depends on the individual situation. We’d need more information to see what would best help in your case. To do that please submit the Candidate form here: We locations in Hyderabad and Mumbai, India:

  9. Caleb

    I had an acute lateral meniscus repair surgery with PRP injection July 31st 2019. I did not have any meniscus pain before the surgery, but frequent knee locking, which would then cause pain for a day or two. Post op 3.5 months and my knee has not locked once, but I have mild pain in the area of the tear more often, and some popping in my patella. Not sure what the pain is coming from, maybe the stitches, general swelling from surgery, maybe from the meniscus being injected several times, or if I just need to be more patient with the post op healing. Maybe I just got back on me knee too fast. Anyways, if the pain persists past about 6 months, I’m thinking maybe another round of prp could help. Is treatment still available even though I have stitches?

    1. Regenexx Team

      Hi Caleb,
      We treat post mensicus surgery patients regularly. Please see: and We’d need more information to see if we could help in any individual case. If you’d like to do that, please use the Candidate button on the last link.


    I was very able bodied and nimble with a love for dance before my surgery for a torn meniscus. I have been in excruciating pain since a MVA almost 2 years ago & the surgery. Cortisone nor hyuronic sp? shots help. High doses of prednisone help & I could dance for a minute but not a long term fix. I am very interested in your stem cell injections. I was in outstanding health prior to the MVA. I VERY MUCH LOOK FORWARD TO HEARING FROM YOU. MY LIFE IS NOW TOO PAINFUL EVEN W/ MY ALLOTMENT OF PAIN PILLS ~ WHICH IS NO WAY TO LIVE NOR HEALTHY. IM DOING ACUPUNCTURE NOW BUT STILL IN GREAT PAIN.

    1. Regenexx Team

      Hi Margaret,
      We’ll have the team contact you.

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