A torn ACL does not heal on its own. For active people who want to return to cutting and pivoting sports, arthroscopic reconstruction rebuilds the ligament with a graft, chosen and placed for your anatomy and your goals.
The anterior cruciate ligament, or ACL, is the primary stabilizer of the knee, the main restraint that keeps the shinbone from sliding and rotating abnormally on the thighbone. When it tears, the knee can feel unstable or give way, especially with pivoting. In reconstruction, the torn ligament is replaced with a graft positioned arthroscopically where the ACL used to be, so the knee can be stable again.
This is why most active patients are advised to have reconstruction. Once the ACL is gone, that stabilizing load shifts onto the medial meniscus and the joint cartilage, which then take the strain the ligament used to absorb. Each episode of the knee giving way risks a new meniscus tear or cartilage damage, and that secondary damage is what drives arthritis down the road. Reconstructing the ACL restores the knee's stability and protects the meniscus and cartilage you still have.
There is no single "best" graft for everyone; the right choice depends on your age, sport, anatomy, and history. Dr. Wichman most often uses a quadriceps tendon autograft, taken from your own tissue, and has extensive experience with patellar tendon, also known as bone-tendon-bone, and hamstring autografts as well. For the right patient, a donor allograft is also an option. We talk through the trade-offs together and pick the graft that fits you.
Graft choice is one of the biggest decisions in ACL surgery, so it helps to look at the numbers. A large systematic review of more than 152,000 reconstructions found that the quadriceps tendon autograft had the lowest annual graft-failure rate, about 0.72%, compared with roughly 1.16% for patellar tendon (bone-patellar-tendon-bone) and 1.70% for hamstring. Randomized-trial meta-analyses generally show the three autografts deliver comparable overall results for stability and patient-reported function, with the quadriceps tendon at least as durable as the alternatives. That combination, low failure and low donor-site problems, is a key reason Dr. Wichman favors the quadriceps tendon for many active patients.
Autograft versus allograft is a sharper divide. In young, active patients, donor allograft fails at markedly higher rates, on the order of several times the odds of graft rupture compared with your own tissue. That is why Dr. Wichman reconstructs with autograft in most active patients and reserves allograft for select situations.
The most important number in ACL recovery is one patients rarely hear: after reconstruction, the opposite, uninjured knee is at least as likely to tear as the reconstructed one. Across studies of young athletes, second-injury rates run about 6% for the graft and about 8% for the other knee, a cumulative reinjury risk near 20%, and athletes under 20 have roughly three times the odds of tearing the opposite side.
That pattern carries a clear message: an ACL injury is not only a torn ligament, it reflects how the whole body moves, lands, and decelerates. Surgery rebuilds the ligament, but physical therapy and neuromuscular re-education, retraining landing mechanics, balance, and control on both legs, are what actually lower the odds of a second injury. Neuromuscular training programs have been shown to roughly halve ACL injury risk and to improve landing biomechanics, and structured secondary-prevention programs have reduced opposite-side ACL injuries in randomized trials. This is why Dr. Wichman treats rehab as part of the operation, not an afterthought, and why return to sport is criteria-based rather than calendar-based: you go back when strength, control, and testing say both knees are ready.
Recovery is a staged process built around physical therapy: protecting the graft early, then rebuilding strength, then sport-specific training. Return to cutting and pivoting sports commonly takes around 6 to 10 months, guided by how your strength and control recover rather than the calendar alone.
For the detailed protocol, see ACL reconstruction post-op instructions.
There is no single best graft. Dr. Wichman prefers a quadriceps tendon autograft and also has extensive experience with patellar tendon and hamstring autografts, and allograft for select patients. The choice is individualized to your anatomy, sport, and goals.
Recovery is staged and driven by physical therapy. Return to cutting and pivoting sports commonly takes about 6 to 10 months, based on your strength and control rather than the calendar alone.
In a systematic review of more than 152,000 reconstructions, the quadriceps tendon autograft had the lowest annual graft-failure rate (about 0.72%), versus roughly 1.16% for patellar tendon and 1.70% for hamstring, and randomized trials show the autografts perform comparably overall. Donor allograft fails at markedly higher rates in young, active patients, which is why autograft is preferred for most of them.
Yes, and this surprises many patients: after reconstruction the opposite, uninjured knee is at least as likely to tear as the reconstructed one. Second-injury rates in young athletes run about 6% for the graft and 8% for the other knee, and those under 20 have about three times the odds of an opposite-side tear. That is why neuromuscular re-education and physical therapy for both legs, not just the surgery, are central to a safe return.
Yes. Neuromuscular training, retraining how you land, balance, and decelerate, has been shown to roughly halve ACL injury risk and improve landing mechanics, and secondary-prevention programs have reduced opposite-side ACL injuries in randomized trials. Rehab is part of the treatment, not an add-on, and return to sport is based on strength and control testing rather than time alone.
No. Some people, especially those who do not do cutting or pivoting sports, can do well without reconstruction. We help you decide based on your instability, activity, and goals.
New patients across Milwaukee are welcome. To request an appointment, email us at the address below and we will follow up to get you scheduled.
This page is for general education and is not medical advice. Whether a procedure is right for you is a decision made with your surgeon after an evaluation. If this is a medical emergency, call 911.
Wichman Orthopedics