Were You Told You Need ACL Reconstruction? You May Be a Candidate to Keep Your Own Ligament.
For the past four to five decades, ACL reconstruction — replacing the torn ligament with a tendon graft taken from somewhere else in the body or from a donor — has been the universal standard of care for ACL tears. That standard was earned. Early attempts at ACL repair in the 1970s and 1980s produced consistently poor results, and the orthopedic community abandoned repair entirely in favor of reconstruction.
But those early repairs did not fail because ACL repair is biologically impossible. They failed because of technique. Large open incisions. Poor suture material. Inadequate fixation. Six weeks of immobilization in a cast. The failure of those repairs was a failure of the tools available at the time — not a failure of the concept.
The tools have changed dramatically. And for a carefully selected group of patients — those whose MRI shows a clean proximal tear with healthy, substantial ligament tissue still attached to the femur — primary ACL repair using modern arthroscopic techniques, high-strength sutures, and purpose-built implants produces excellent results. The native ligament is preserved. The proprioceptive nerve endings that help the knee sense position and protect itself from re-injury remain intact. Recovery is faster than reconstruction. And the patient avoids the donor site complications that come with harvesting a graft from somewhere else in the body.
Dr. Raffy Mirzayan has performed approximately 30 ACL repairs over the past five years — selecting patients carefully based on MRI findings and direct arthroscopic assessment of ligament quality. His revision rate in this series: zero percent.
Not every ACL tear is repairable. But if yours is — you deserve to know before you undergo reconstruction.
Call (310) 746-5918 to schedule a consultation. Virtual consultations are available for patients traveling from out of state.
Why ACL Repair Was Abandoned — and Why It Is Back
The history of ACL repair is important context for understanding why this approach is only now being revisited — and why the current results are so different from those of the 1970s and 1980s.
The early repair attempts combined every possible technical disadvantage. Surgeons made large open incisions, displaced the kneecap to access the joint, used suture materials that were too weak to hold the repair under functional loads, tied knots over bone bridges with fixation that was insufficient to resist the forces of early motion, and then immobilized the knee in a cast for six weeks — producing stiffness, muscle atrophy, and a repair that had already failed before rehabilitation even began.
The failure rate was so high and so consistent that the entire field concluded ACL repair was not viable — and reconstruction became the universal standard.
What that conclusion missed was that the failures were driven by technique, not biology. The ACL has blood supply. It has the capacity to heal. When the right tear pattern exists — a proximal avulsion from the femur with intact, healthy ligament tissue — the biological environment for healing is present. What was missing in the early era was the technical capability to create a repair construct strong enough to protect that healing while rehabilitation began.
Modern arthroscopic surgery, high-strength braided suture, and purpose-built implants designed specifically for ligament-to-bone fixation have changed that equation. A surgeon named Justin Wolfe in New York pioneered the modern approach to ACL repair approximately ten to fifteen years ago, reporting excellent results in carefully selected patients. Since then, the evidence base for primary ACL repair has grown steadily — and surgeons with the right patient selection criteria and the technical experience to perform the procedure reliably have consistently reported outcomes that match or approach those of reconstruction in appropriate candidates.
Dr. Mirzayan is one of those surgeons. With approximately 30 repairs performed over five years and a zero percent revision rate, his results in carefully selected patients are exactly what the emerging literature predicts for this approach — and exactly what patients with the right tear pattern deserve to hear about before committing to reconstruction.
Who Is a Candidate for ACL Repair?
This is the most important question on this page — because the answer determines everything. ACL repair is not appropriate for every patient or every tear. The selection criteria are specific, and departing from them produces exactly the kind of failures that led the field to abandon repair in the first place.
The MRI is the starting point — but not the final word
In most ACL tears, the ligament is shredded. There is minimal tissue remaining, no coherent stump to repair, and no biological substrate for healing. These patients need reconstruction. The MRI makes this clear.
In a subset of patients — perhaps 10 to 15 percent of ACL tears — the MRI tells a different story. The tear is proximal, at the femoral attachment. The ligament fibers are intact but detached from the bone. There is substantial, healthy-appearing tissue remaining. These are the patients Dr. Mirzayan considers for repair.
The arthroscope makes the final decision
Even in patients whose MRI looks favorable for repair, the final decision is made at the time of surgery — not in the office. Dr. Mirzayan places the arthroscope in the knee first and directly assesses the ligament before committing to repair. He evaluates the tissue quality, the vascularity of the stump, and whether the ligament fibers are coherent enough to hold sutures reliably under functional loads.
If the ligament passes that assessment — robust, vascularized, intact fibers — he proceeds with repair.
If it does not — regardless of what the MRI suggested — he proceeds with reconstruction without hesitation. Every patient who is consented for repair is simultaneously consented and prepared for reconstruction, with the graft already available in the room. The decision to convert is made without compromise.
Patient factors that favor repair
Beyond the MRI and arthroscopic findings, several patient factors make repair more or less appropriate. Younger patients with acute tears — within the first few weeks of injury, before the tissue quality has deteriorated — are the best candidates. Patients with proximal femoral avulsions rather than mid-substance tears have more repairable tissue. Patients with lower body weight and lower-demand sport profiles carry less mechanical risk to the repair during healing. And patients who are willing to follow a carefully supervised rehabilitation protocol that protects the repair during the critical early healing phase are the ones most likely to succeed.
The Repair: What Happens in Surgery
ACL repair is performed entirely arthroscopically — through the same small portals used for diagnostic knee arthroscopy, with no large incisions and no harvesting of tissue from any other part of the body.
After confirming ligament quality at arthroscopy, Dr. Mirzayan prepares the femoral footprint — the attachment site where the ACL originated before it tore. The ligament stump is debrided of scar tissue and freshened to stimulate a biological healing response. High-strength sutures are passed through the ligament tissue in a pattern designed to maximize pull-out strength. A purpose-built implant anchors the repair to the femoral cortex, holding the ligament in its anatomic position under appropriate tension while biological healing occurs.
The result is a repair that holds the native ligament securely against the bone — in the correct position, under the correct tension — and allows healing to proceed in a mechanically protected environment from the moment the surgery is complete.
There is no graft harvest. No patellar tendon defect. No hamstring harvest. No quadriceps tendon incision. The only structures that are addressed are the torn ACL and its femoral attachment.
Recovery: Faster Than Reconstruction — with Important Caveats
One of the most compelling advantages of ACL repair over reconstruction — when it is appropriate — is the recovery timeline. Because no graft is harvested, there is no donor site to heal. Because the native ligament is preserved with its proprioceptive nerve endings intact, neuromuscular recovery begins earlier. And because the repair restores the native anatomy rather than replacing it with a substitute, the biological environment for healing is more favorable than in reconstruction.
In appropriately selected patients, return to sport after ACL repair is typically faster than after reconstruction — with many patients returning to cutting and pivoting activities between 6 and 8 months rather than the 9 to 12 months that reconstruction typically requires.
However, this faster timeline comes with an important caveat: the repair must be protected during the critical early healing phase. The native ligament healing to bone is a biological process that cannot be rushed, and aggressive rehabilitation that overloads the repair before adequate healing has occurred will produce a failure. Dr. Mirzayan's rehabilitation protocol is designed to balance early motion — which reduces stiffness and preserves quadriceps function — with the protection the healing repair requires.
Every patient is given a personalized rehabilitation timeline based on their specific repair, their anatomy, and their sport.
ACL Repair Versus ACL Reconstruction: How to Think About the Choice
For patients who are candidates for both — whose MRI shows a potentially repairable tear and whose arthroscopic findings confirm adequate tissue quality — the choice between repair and reconstruction is a genuine decision that deserves a direct, honest conversation.
The case for repair: Preserves the native ligament and its proprioceptive nerve endings. Avoids donor site complications entirely. Faster recovery timeline. No graft harvest morbidity. If it heals — and in Dr. Mirzayan's series it has healed in every case — the patient retains their own biological ligament rather than a substitute.
The case for reconstruction: A longer track record. A graft that is not dependent on the native tissue's healing capacity. Well-established rehabilitation protocols. For patients whose tissue quality is borderline at arthroscopy, reconstruction may offer more reliable long-term stability than a repair performed on tissue that is adequate but not ideal.
Dr. Mirzayan will give you an honest assessment of which approach is appropriate for your specific tear — and will never recommend repair for a patient whose tissue quality makes reconstruction the more reliable choice. The goal is the best possible outcome for your knee over the next 20 years, not the most novel procedure.
Coming from Las Vegas, Phoenix, or Out of State?
If you have been told you need ACL reconstruction and have not been evaluated for the possibility of repair, a consultation with a surgeon who performs both — and who has the experience to select the right approach for your specific tear — is worth pursuing before committing to surgery.
Dr. Mirzayan regularly treats patients from Las Vegas, Henderson, Phoenix, Scottsdale, and across the country. Virtual consultations are available. You can submit your MRI in advance, meet Dr. Mirzayan on video, and get an honest assessment of whether your tear might be a candidate for repair rather than reconstruction — before committing to travel or time away from sport.
If you carry a commercial insurance plan — Blue Cross Blue Shield PPO, Aetna, Cigna, United Healthcare, or a self-funded employer plan — you likely have out-of-network benefits that cover a substantial portion of the cost of surgery. His office will verify your coverage before you commit to anything.
Call (310) 746-5918 or contact us online to schedule your consultation.
Frequently Asked Questions
What is primary ACL repair and how is it different from reconstruction?
ACL reconstruction replaces the torn ligament with a tendon graft — harvested from the patient's own body or from a donor. ACL repair reattaches the torn native ligament back to its original attachment point on the femur using sutures and a purpose-built implant, without replacing it with a graft. Repair preserves the patient's own ligament with its proprioceptive nerve endings intact, avoids any graft harvest, and — in appropriate candidates — allows a faster recovery than reconstruction.
Why did ACL repair fail in the past?
The early ACL repairs of the 1970s and 1980s failed because of technique — large open incisions, weak suture material, inadequate fixation, and prolonged cast immobilization that produced stiffness and atrophy before the repair ever had a chance to heal. Those failures reflected the limitations of the tools available at the time, not a fundamental biological problem with repairing the ACL. Modern arthroscopic technique, high-strength sutures, and purpose-built implants have changed the equation for carefully selected patients.
How do I know if my ACL tear is repairable?
The MRI is the starting point. A proximal femoral avulsion with substantial, healthy-appearing ligament tissue remaining is the pattern most consistent with repairability. A shredded mid-substance tear with minimal tissue remaining is not repairable. However, the final decision is always made at arthroscopy — after direct visualization of the ligament tissue under magnification. Dr. Mirzayan will review your MRI and give you an honest assessment of whether your tear looks favorable for repair before surgery is planned.
What is Dr. Mirzayan's experience with ACL repair?
Over the past five years, Dr. Mirzayan has performed approximately 30 primary ACL repairs in carefully selected patients. His revision rate in this series is zero percent — meaning no patient has required a subsequent reconstruction after repair. This result reflects both the stringency of his selection criteria and the technical execution of the repair itself.
Is ACL repair faster to recover from than reconstruction?
In appropriately selected patients, yes. Because no graft is harvested, there is no donor site to heal. Because the native ligament is preserved with its proprioceptive nerve endings intact, neuromuscular recovery begins earlier. Most patients who undergo successful ACL repair return to cutting and pivoting sport between 6 and 8 months — faster than the 9 to 12 months typically required after reconstruction. However, the repair must be protected during the critical early healing phase, and Dr. Mirzayan's rehabilitation protocol is designed to balance early motion with appropriate protection.
What happens if Dr. Mirzayan gets into the knee and decides the ligament is not repairable?
He proceeds with reconstruction — without hesitation and without a second surgery. Every patient who is consented for repair is simultaneously consented and prepared for reconstruction, with the graft already available in the operating room. If the arthroscopic assessment reveals tissue that is not of adequate quality to repair reliably, the decision to convert is made immediately. The patient wakes up from surgery with the procedure that gives them the best possible outcome — whether that is repair or reconstruction.
Should I have ACL repair or ACL reconstruction?
That depends entirely on your specific tear pattern, your tissue quality at arthroscopy, and your individual anatomy and goals. Dr. Mirzayan will give you an honest, individualized recommendation based on your MRI and a thorough consultation — not a preference for one procedure over another. For patients whose tears are clearly not repairable, he recommends reconstruction. For patients whose tears look favorable for repair, he discusses both options openly and honestly. The goal is the right surgery for your knee — not the most novel one.
Do you offer virtual consultations for out-of-state patients?
Yes. You can submit your MRI in advance, meet Dr. Mirzayan on video, and get an honest assessment of whether your tear might be a candidate for repair rather than reconstruction — before committing to travel or time away from sport. Call (310) 746-5918 to schedule.
Does being out-of-network mean I will pay full price out of pocket?
Not necessarily. Many patients with commercial insurance — especially PPO plans and self-funded employer plans — have strong out-of-network benefits. Dr. Mirzayan's office will verify your coverage before your consultation so you have a clear picture of what to expect before making any decisions.
You May Also Be Interested In
Patella Dislocation and Instability
Frequently Asked Questions
About Dr. Raffy Mirzayan
Dr. Raffy Mirzayan, MD is a double-board certified orthopedic sports medicine surgeon with 25 years of experience performing ACL surgery at every level of competition. He is one of a select group of surgeons in the United States who performs primary ACL repair in carefully selected patients — with approximately 30 repairs performed over the past five years and a zero percent revision rate. His approach to ACL repair is grounded in rigorous patient selection: the MRI identifies candidates, the arthroscope confirms them, and reconstruction is always available without hesitation when the tissue does not meet the standard for repair. For patients who have been told they need ACL reconstruction and want to know whether their tear might be repairable — preserving their own native ligament, avoiding graft harvest, and potentially returning to sport faster — Dr. Mirzayan offers the experience, the judgment, and the honest assessment to give them the right answer. He practices at DOCS Health in Los Angeles, serves as a Clinical Professor of Orthopaedic Surgery at USC, and welcomes patients from across the United States, including Las Vegas, Phoenix, and Scottsdale, for virtual consultations and in-person care.
DOCS Health | 8436 W 3rd St #800, Los Angeles, CA 90048 | (310) 746-5918 | raffymirzayan.com
