Don’t Count on ACL Surgery to Prevent Arthritis

By /

knee acl surgery and arthritis

ACL reconstruction surgery has become like a rite of passage for athletic kids and adults. However, what if the research showed it didn’t work? Meaning the only real reason to undergo the invasive surgery is to prevent problems from occurring down the line. Now a new study adds to the body of evidence that the procedure doesn’t prevent arthritis. So why are we drilling holes in knees and harvesting and installing tendons?

The Idea Behind ACL Surgery

The anterior cruciate ligament (ACL) is a strong stabilizer of the knee that lives inside the structure. It can be torn during athletic activities, and many patients these days end up in surgery when that happens. The concept behind repairing the ligament is that with a torn ACL, the knee is unstable. This instability can lead to arthritis, so the idea is that by surgically replacing the ACL, we’re reducing the likelihood that the knee will get arthritic.

The Problems with ACL Surgery

Despite being a really common surgery, we know, based on the research, that all is not rosy in ACL surgery land. Take the following examples:

What Do Prior Studies Say About the Effectiveness of Reconstructing the ACL?

Many national health systems now have policies that recommend conservative care before surgery to treat ACL tears. Why? Studies like this 143-patient investigation where patients with ACL tears who had surgery were compared to patients who did not. In this case, the patients who didn’t opt for surgery were more able to get back to sports in their first year after injury. At the end of two years, there was no difference in return to sports.

The academic group tasked with reviewing many studies and determining guidelines recently said the following:

“For adults with acute ACL injuries, we found low-quality evidence that there was no difference between surgical management (ACL reconstruction followed by structured rehabilitation) and conservative treatment (structured rehabilitation only) in patient-reported outcomes of knee function at two and five years after injury.”

The group went on to say that in the largest study they reviewed, since there were patients who opted not to get surgery who later still decided to get surgery, the question can’t be fully answered until two ongoing and larger higher-quality trials are completed. This is because we can’t tell, based on the study design, if their decision to get the surgery was based on symptoms, peer pressure from coaches or players, or something else.

What Do Prior Studies Say About Knee Arthritis After ACL Surgery?

One of the reasons to get the surgery is to protect the knee from arthritis. However, the surgery may not be very good at preventing arthritis. For example, a recent long-term follow-up of a randomized controlled trial of knee ACL surgery showed that the ACL-operated knee got arthritis at three times the rate of the nonoperated knee.

What Does the New ACL Surgery Study Say?

The new study was published last month and looked at 154 patients in Holland who had complete ACL tears where 50 were treated without surgery and the rest received the ACL reconstruction procedure. After two years, MRIs showed that opting to get the knee ACL surgery did not protect you from arthritis, as there was no difference in the arthritis rates of the surgery and no-surgery groups.

The Upshot? The research supporting knee ACL surgery for a tear is weak at best. If the athlete can avoid the surgery, there seems to be little difference in arthritis rates, meaning the surgery clearly doesn’t protect the knee. In addition, based on the research we have now, return to play in the first year is faster without the surgery. If the athlete can’t return to play without surgery, our early research suggests about 70% can be treated with a precise image-guided injection of their own stem cells. We have a second and larger MRI case series that will be published later this year as well as the first set of results from our randomized controlled trial.

Get health and wellness information from a trusted source.

By submitting the form, you are agreeing that you read and consent to our Privacy Policy. We may also contact you via email, phone, and other electronic means to communicate information about our products and services. We do not sell, or share your information to third party vendors.

Category: Latest News

Leave a Reply

Your email address will not be published. Required fields are marked *

4 thoughts on “Don’t Count on ACL Surgery to Prevent Arthritis

  1. John

    Rotator cuff recovery

  2. Marina cocconi

    I have a complete A CL anterior ligament torn since 2 months ago.i am female 50 years quite active.. love to dance and the outdoors. I am into homopathy and always try ways to avoid surgery when possible. I am fine now after almost 2 months of physiotherapy. I had also inner tligaent tear grade 2 but i have almost recovered from that. When you refer that the operation does iteven acelerate arthitis, are you refering to results based on new techniques of acl tear surgery ?? What can i do to prevent any further damage to meniscus and cartilage?? That would have been my main reason i would have chosen surgery.. i woul appreciate your feedback.


    1. Regenexx Team

      Hi Marina,
      We’re referring to any ACL surgery which removes and replaces the ACL with a graft. The issue with not treating an ACL tear is that the knee is usually left unstable. Please see: and To advise on any specific case we’d need more information. For us to weigh in on your case, please submit the Candidate form here:

Is Regenexx Right For You?

Request a free Regenexx Info Packet


Learn about the #1 Stem Cell & Platelet Procedures for treating arthritis, common joint injuries & spine pain.

Join a Webinar


Get fresh updates and insights from Regenexx delivered straight to your inbox.

Subscribe to the Blog


9035 Wadsworth Pkwy #1000
Westminster, CO 80021


Copyright © Regenexx 2020. All rights reserved. | Privacy Policy

*DISCLAIMER: Like all medical procedures, Regenexx® Procedures have a success and failure rate. Patient reviews and testimonials on this site should not be interpreted as a statement on the effectiveness of our treatments for anyone else.

Providers listed on the Regenexx website are for informational purposes only and are not a recommendation from Regenexx for a specific provider or a guarantee of the outcome of any treatment you receive.