The Anterior Cruciate Ligament – or the ACL is the most commonly injured ligament in our knee.  Surgery for an anterior cruciate injury has become commonplace.   An ACL tear and resulting anterior ligament surgery can challenge the toughest young athlete.   Anterior cruciate ligament surgery is far from routine for many surgeons.  Now more than ever before you need to know as much as possible about your ACL surgery options.  At the bottom of this post are the essential questions you will need to ask if you or your child are considering surgery.

There are many reasons why ACL tears are occurring at an increasing rate.

  • Loss of seasonality
  • Single sport specialization
  • genetics
  • poor training and biomechanics

We have a loss of seasonality in sports prone to cruciate injuries. Our soccer players now play year round.  There’s no rest and their knee ligaments are not getting a chance to recover.

Single sport specialization is a creation of modern times.  Our athletes were not meant to only play one sport year round.  Most elite athletes specialized in many sports.   By concentrating on a single sport year round we are causing a lot of stress on some of the weakest links in your body.  Cruciate ligament tears are more common in children who focus on a single sport.

ACL surgeryWe also know that many people are predisposed to tearing their ACL because of their landing,jumping and pivoting mechanics.

What is the ACL?

The ACL is one of the four strongest ligaments in our knee.  It sits in the center and is made of a very tough tissue we call collagen.  The ACL keeps our knee stable for sports involving pivoting, turning and twisting at rapid speeds.  The ligament is actually made up of two pieces or bundles of ligament tissue.  Sometimes an injury to your anterior cruciate ligament only involves one bundle and we refer to that as a partial ACL tear.  More on partial ACL tears.

Why Did My ACL Tear?

Most ACL Injuries occur as a result of a non-contact twisting injury.  You pivoted, you heard a pop, and likely fell to the ground.  Get the ice… and the crutches.  The swelling can be impressive. In athletes under 25 years of age, a twisting injury, feeling a pop and noticing a swollen knee a little while later carries a 75% chance of an ACL injury.

Do I Need an MRI?

Does a good sports doc need an MRI to prove that you have suffered an ACL tear? No.  Our exam of your knee can tell us that.  But we do obtain an MRI following ACL injuries.  We obtain an MRI because 1. you expect it.. and 2. to make sure that you have not injured anything else- such as a meniscus or the cartilage on the ends of the bones.

Do I Need ACL Surgery?

ACL SURGERYIf you are an athlete who participates in sports involving cutting, pivoting, turning and twisting there is a strong likelihood that you will require ACL surgery.  If you’re older, and you’re willing to modify your lifestyle to suit your limitations, then you may get by without it.  Children almost always end up having ACL surgery.  The scientific literature shows that children are very likely to suffer secondary injuries to the knee if their knees are not stabilized prior to return to activities.

ACL Surgery Questions to Ask:

Why are you recommending ACL surgery? There is very little debate about how to treat an anterior cruciate ligament tear in a young athlete.  Most doctors would recommend an early reconstruction.  Many studies show that children are at a high risk of causing more damage to their knee if ACL surgery is not performed and the knee remains unstable.

  • For those of you beyond 30 you may have a difficult choice to make.  It is clear that all tears do not require ACL surgery.  Are you being told that you need it fixed simply because it is torn?
  • What about lifestyle modifications, activity modifications, therapy and bracing?

What is the anatomical method of ACL Surgery? : As you read about ACL surgery you will see references to many different techniques.  Our thoughts about how to fix an ACL are changing.   Surgery to replace a torn torn ligament have evolved A LOT over the past 5-7 years.  Older methods did not place the ligament where nature intended it to be.  Many sports docs are very knowledgeable about these latest technique modifications.  This is an area of much interest.  You should feel open to talk with your surgeon about what type of reconstructive surgery they perform.

  • single bundle vs double bundle (probably doesn’ matter)
  • anatomic versus traditional ACL surgery. Most surgeons have transitioned to an anatomic reconstruction.

How many ACL reconstructions do you perform in a year?  VOLUME MATTERS! Do not use a surgeon who performs a only few reconstructions a year.  Find a surgeon who performs a few per month or more. Click here to learn more about how to choose your ACL surgeon

What ACL graft would you recommend and why?  We need to use something to reconstruct your new ACL with during surgery.  See our video discussion below on graft choices.  We have two broad options:

1. Allograft – tissue from a cadaver, and

2. Autograft – tissue from your own body.

The literature surrounding the use of allografts, especially in young patients has demonstrated a failure rate approaching 40% in some series.  Bottom line, unless there is a strong reason why you can not use your own tissue (autograft) then you should probably not use allograft. Click here to learn more about ACL graft choices.

In the autograft category we have two main choices- a portion of your hamstring tendons, or the center of your patella tendon.   Both grafts work well and stand the test of time in a properly performed surgery.  A patella tendon graft certainly hurts more, but that may be worth it in certain individuals.  Research is starting to show that a hamstring harvest in women may not be a good thing for a high level athlete.  Women tend to be quadriceps dominant… so  the front of their thigh is stronger than the back where the hamstrings are.  It stands to reason that we do not want to make them even more quadriceps dominant by harvesting their hamstring tendons.   In some people, especially elite athletes, a hamstring graft can produce weakness.  While barely perceptible to most, some will notice the difference.  Over my career the pendulum has swung from patella tendon grafts to hamstrings and it appears to be swinging back once again to patella tendon grafts.  Have a long discussion with your physician.. question why they suggest a certain graft.  This is especially true if considering ACL surgery with an allograft.

Should I start therapy before my ACL surgery?  Yes.. prehabilitation can get your knee ready for the procedure and start the muscle reeducation process.  Early research shows that PT before surgery improves your results after surgery.  A flexible strong knee going in eases some issues following surgery.




Dr. Howard Luks, MD – Fishkill, NY, 200 Westage Business Center, Suite 115, Fishkill, NY 12524, United States (US) - Phone: (845) 896-4178 Fax: (914) 789-2743 Email: