I have an ACL (anterior cruciate ligament) tear, which was confirmed by an MRI (it my be partial or complete; I was not told which.)

My question: is surgery the only way to treat ACL tears? Is surgery necessary in order to regain full strength/function of the knee?

I an very active and would like to return to sports like skiing,

2 Answers 2


Though most people do get surgery to reconstruct their torn ACL, it is possible to regain full ability of your knee without surgery. Just through rehabilitation, you can totally recover from a torn ACL.

In a clinical trial done in 2010,1 two different treatment strategies were given to 121 young, active adults (ages 18-35) who suffered acute ACL injuries. One strategy was rehabilitation with early ACL reconstruction surgery. Most people given this treatment strategy opted for the early surgery (61 out 62). The other strategy was rehabilitation with delayed ACL reconstruction surgery. Of the 59 people treated with this strategy, only 26 people opted to get surgery. The other 36 were healed with just rehabilitation.

Though that trial was meant to find the most effective treatment of torn ACLs, it did display that with physical therapy and time, it is possible to completely recover from a major ACL injury.

There are some situations in which rehabilitation without surgical reconstruction is not very effective for a torn ACL. If other parts of the knee, such as other ligaments, have also been injured, it is recommended that you get surgery. It is also recommended that you get surgery if you are still active, as running, jumping, pivoting, and other activities that give you a higher chance of reinjuring your ACL.

1: A Randomized Trial of Treatment for Acute Anterior Cruciate Ligament Tears

MedicineNet: What is the treatment for a torn ACL?

Sutter Health: Nonsurgical Treatment for ACL Injuries

  • "The other 36 were healed with just rehabilitation." Even if I tore my ACL completely? I mean what do you mean by healed, do the ACL magically attaches itself if it was tore completely?
    – VaTo
    Feb 24, 2017 at 5:05
  • @VaTo -- Once the ACL is gone, it's gone. By "healing", the study means that the other participants were able to recover to their full level of physical activity (upto their satisfaction) that they did not need a surgery after all. In other words, they were able to live without an impediments without an ACL at all.
    – WorldGov
    Oct 4, 2018 at 7:47

Short answer, yes it is possible to have a full recovery without surgery. If the ligament is only torn, it may heal with a careful recovery plan. If it is torn, most of the strategies revolve around strengthening the muscles that also help stabilize the knee.

Most of the links that I would use were already covered in michaelpri's answer, so I would just add a bit. The function of the ACL is to keep the distal (lower) end of the femur from "sliding" off the front of the tibia, and to provide rotational stability.

Considering the position of skiing with the knees bent, and weight forward, and the rotation needed in the lower legs for turning (especially if you are a more advanced/mogul style skiier), I would highly recommend you explore the surgical option. In my opinion (And that of the AAOS), that would give you the best chance to reurn to full activity. In addition, there may be other collateral damage to the meniscus and other structures that could be repaired with surgery.

As an aside, I faced the same decision with a complete rupture of the achilles tendon, and opted for surgery. I'm back at full activity, with no after effects.

  • I guess I didn't quite followed. In my case I tore my ACL a little over a year ago (14 months to be exact) and I haven't gotten surgery. Am I still on time to recover or it's too late already? And if for any reason I get full recovery without surgery do I have to keep going to rehabilitation forever then?
    – VaTo
    Feb 24, 2017 at 5:11
  • @VaTo - No way to tell how recovered you are. At 14 months, it should have been completed, but the only way to tell if there is any other damage or limitations is to have an assessment done, and follow their recommendations.
    – JohnP
    Feb 24, 2017 at 15:55
  • I guess my question is, is it to late to get into physical therapy since I haven't get any kind of it? I don't think I'm recovered in any way because I still feel my knee loose and it hurts sometimes.
    – VaTo
    Feb 24, 2017 at 17:42

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