A safe return to sport after an ACL tear
Arthroscopic reconstruction of the anterior cruciate ligament using the patient’s own tendon graft, with a graded rehabilitation protocol built around returning to sport safely rather than quickly.
Do you actually need ACL surgery?
A torn ACL does not heal on its own, but not every tear needs immediate surgery. The decision depends on your age, activity level and associated injuries. Signs that favour reconstruction:
- Recurrent instability, or the knee ‘giving way’ when walking or changing direction
- An audible pop at the time of injury followed by rapid swelling within hours
- A complete tear confirmed on MRI
- An associated meniscal or other ligament injury
- A wish to return to sport involving running and sudden direction changes
- Repeated episodes of giving way despite completing physiotherapy
Timing matters: operating on a swollen, stiff knee increases the risk of post-operative stiffness. Treatment usually begins with a ‘prehabilitation’ phase to restore range of movement and muscle strength, after which surgery is scheduled. In selected partial tears, rehabilitation alone may be sufficient.
What we treat in ACL injuries
An ACL tear rarely occurs in isolation, which is why assessment always begins with an MRI of the whole joint.
Complete ACL tear
Full arthroscopic reconstruction with a tendon graft — the most common presentation in athletes and active young adults.
Partial tear
May be managed with rehabilitation alone if the knee remains stable, requiring careful assessment to distinguish a stable from an unstable partial tear.
Combined meniscal injury
Repairing the meniscus in the same operative session wherever possible, preserving it rather than removing it.
Failed previous reconstruction
Revision surgery, which first requires identifying why the original failed: tunnel position, an inadequate graft, or incomplete rehabilitation.
Posterior cruciate ligament
Less common than the ACL and usually caused by road traffic accidents; many cases are managed conservatively.
Professional athletes
A return-to-play protocol based on functional testing and measured strength symmetry, not on elapsed time alone.
Key numbers and treatment options
- In an analysis of 69 studies (7,556 patients), 81% returned to sport after ACL reconstruction, 65% to their pre-injury level and 55% to competitive sport (Ardern et al., BJSM 2014).
- The rate of a second ACL injury (same or other knee) was 15% overall and 23% in athletes under 25 returning to sport — nearly one in four (Wiggins et al., AJSM 2016).
- In the STABILITY 1 trial (618 patients aged 14–25), adding lateral extra-articular tenodesis cut graft rupture from 11% to 4% and clinical failure from 40% to 25% over two years (Getgood et al., AJSM 2020).
- In a randomised trial of young active adults with acute ACL tears, 36 of 59 patients (61%) who started with rehabilitation avoided surgery over two years, with function similar to early reconstruction (Frobell et al., NEJM 2010).
- In a Cochrane review of 19 trials (1,597 patients), patellar tendon and hamstring grafts did not differ in function or re-rupture, with more anterior knee pain after patellar tendon grafts (Mohtadi et al., Cochrane 2011).
- In an analysis of 51 studies (3,931 menisci), meniscal repair failed in 8.5% when done with ACL reconstruction versus 14% without it (Schweizer et al., AJSM 2024).
At Prof. Dr. Ibrahim Shaarawi’s clinics in Nasr City, Mohandeseen and New Cairo (5th Settlement) we test knee stability and review your MRI at the same visit, then decide on rehabilitation or reconstruction according to your activity and any associated meniscal injury.
Treating ACL injuries
| Treatment | When we use it | What to expect |
|---|---|---|
| Structured rehabilitation | Partial tears, or complete tears with a stable knee and low-pivoting activity | Some patients avoid surgery, with stability monitored |
| Arthroscopic ACL reconstruction | Knee instability, pivoting and jumping sports, or an associated meniscal tear | Graded return to sport over roughly 9–12 months |
| ACL reconstruction + meniscal repair | A repairable meniscal tear with the ACL tear | Preserves the meniscus and lowers arthritis risk |
| ACL reconstruction + lateral tenodesis (LET) | Young athletes, high-grade rotational laxity, or revision | Lower risk of graft re-rupture |
| Revision ACL reconstruction | A failed previous reconstruction with instability | Careful tunnel planning, sometimes in two stages |
Treating PCL injuries
| Grade | Usual treatment | Notes |
|---|---|---|
| I–II (partial) | Quadriceps-focused rehabilitation, with a brace if needed | Most patients return to activity without surgery |
| III (complete) | Rehabilitation first, reconstruction if instability persists | Guided by symptoms and activity level |
| Combined ligament injury | Reconstruction of the injured ligaments | Prevents instability and cartilage damage |
Your treatment pathway, step by step
Diagnosis
Clinical examination of knee stability (Lachman and anterior drawer tests) with an MRI confirming the tear and revealing associated injuries to the menisci and other ligaments.
Prehabilitation
A frequently underestimated phase: resolving swelling, restoring full range of movement and strengthening the quadriceps before surgery — the single biggest factor in avoiding post-operative stiffness.
Choosing the graft
Selecting the graft source (hamstring tendons or patellar tendon) by age, sport and return requirements, with the advantages and drawbacks of each explained.
Arthroscopic reconstruction
Rebuilding the ligament through small portals, drilling precise tunnels in the femur and tibia and fixing the graft in the correct anatomical position.
Early rehabilitation
Starting day one: restoring full extension, controlling swelling, and activating the quadriceps, with assisted walking as directed.
Graded return to sport
A programme typically spanning 6 to 9 months, with the return-to-play decision made on functional testing and strength symmetry rather than elapsed time.
Watch: the steps of arthroscopic ACL reconstruction
Prof. Dr. Ibrahim Shaarawi walks through the steps of arthroscopic ACL reconstruction and the expected recovery time (video in Arabic).
What determines a successful reconstruction?
Success rates for ACL reconstruction are high, but the difference between an excellent and an average result comes down to known factors.
- Accurate tunnel placementPositioning the tunnel anatomically is the single most important surgical factor; error here is the commonest cause of failure.
- Treating associated injuriesLeaving a meniscal tear or another ligament injury untreated overloads the new graft.
- Restoring full extension earlyFailure to regain full extension in the first weeks leaves a stiffness that is difficult to correct later.
- Quadriceps strengthStrength difference between the two legs is the most important indicator of readiness to return to sport.
- Not rushing the returnReturning to play before rehabilitation is complete is the commonest cause of re-rupture, especially in younger athletes.
- Injury prevention programmeBalance and landing-mechanics training reduces the risk of injuring the opposite knee, which is a genuine risk after a first ACL injury.
ACL graft options compared
There is no single “best” graft for everyone. A Cochrane review found no major difference in overall function between patellar tendon and hamstring grafts, with differences in anterior knee pain and stability — so the graft is chosen by age, sport and knee characteristics.
| Graft | Advantages | Considerations | Often suits |
|---|---|---|---|
| Hamstring tendons | Small incision, less kneeling pain | Temporary hamstring weakness; LET may be added in young athletes | Most patients and recreational athletes |
| Patellar tendon (BTB) | Fast bone-to-bone healing, strong fixation | Anterior knee pain when kneeling is more common | High-level contact and pivoting sports |
| Quadriceps tendon | Thick, strong graft with less anterior pain than patellar tendon | Requires experience with harvest and fixation | Revision surgery or when other grafts are unsuitable |
Some knees need an added procedure such as lateral extra-articular tenodesis (LET) or a meniscus repair in the same operation — see ACL and meniscus surgery together.
Why Prof. Dr. Ibrahim Shaarawi
✅ Last medically reviewed by Prof. Dr. Ibrahim Shaarawi, Professor of Orthopaedic Surgery, on 5 October 2026
- Assessment before any decision to operateSurgery is offered only after appropriate conservative treatment has been exhausted, because many patients improve without an operation.
- Academic backgroundMD and MSc in Orthopedic Surgery from Ain Shams University, with training in the Ain Shams University hospitals.
- International trainingVisiting professor and training at Ohio State University Hospital in the United States, applying the protocols used there.
- One plan from diagnosis to rehabilitationDiagnosis, surgery, physiotherapy and follow-up handled as a single pathway rather than split across separate providers.
Read patient success stories or review the full profile and credentials.
Cost and booking
The cost of ACL reconstruction depends on the graft and fixation devices used, whether meniscal repair is carried out in the same session, and the hospital, anaesthesia and length of stay.
A final figure is given after the MRI and examination, because associated injuries are what actually change the scope of the operation.
Important: bring all previous imaging and reports to your first visit, along with a list of your current medications, so an accurate plan can be made from the outset.
Frequently asked questions
What is the success rate of ACL reconstruction?
Success rates for restoring knee stability are high, but returning to the same level of sport depends heavily on the quality of and adherence to rehabilitation, and on whether there are associated injuries to the menisci or articular cartilage.
When can I return to sport?
The usual programme spans 6 to 9 months. More importantly, the return decision is based on functional testing and measured strength symmetry rather than elapsed time alone, because returning early is the commonest cause of re-rupture.
Can I live without ACL surgery?
It is possible in selected patients: older or less active people whose knee remains stable after rehabilitation. But ongoing instability combined with pivoting activity exposes the menisci and articular cartilage to damage and accelerates arthritis.
Where does the graft come from?
The graft is usually taken from the patient’s own hamstring tendons or patellar tendon. Each has advantages and drawbacks in strength, healing time and anterior knee pain afterwards, and the choice follows age and sport.
What are the signs of a failed reconstruction?
Recurrent instability or giving way, persistent swelling and pain with activity, or an inability to regain full extension. Identifying the cause requires examination and imaging to establish whether the problem lies in tunnel position, the graft itself, or incomplete rehabilitation.
Is the surgery arthroscopic or open?
ACL reconstruction is performed arthroscopically through small portals, which means less post-operative pain and faster recovery of the surrounding tissues compared with open surgery.
Book a knee injury assessment
If you have been injured playing sport or told you have an ACL tear, early assessment establishes whether you genuinely need surgery — and, just as importantly, starts the prehabilitation phase that shapes the result.
Related reading
References
- American Academy of Orthopaedic Surgeons (OrthoInfo). Anterior Cruciate Ligament (ACL) Injuries.
- NHS. Knee ligament surgery.
- Mohtadi NG, et al. Patellar tendon versus hamstring tendon autograft for anterior cruciate ligament rupture in adults. Cochrane Database Syst Rev. 2011;(9):CD005960.
- Frobell RB, et al. A randomized trial of treatment for acute anterior cruciate ligament tears. N Engl J Med. 2010;363(4):331-42.
- Ardern CL, et al. 2016 Consensus statement on return to sport from the First World Congress in Sports Physical Therapy, Bern. Br J Sports Med. 2016;50(14):853-64.
- van Melick N, et al. Evidence-based clinical practice update: practice guidelines for anterior cruciate ligament rehabilitation based on a systematic review and multidisciplinary consensus. Br J Sports Med. 2016;50(24):1506-1515.
- Getgood AMJ, et al. Lateral extra-articular tenodesis reduces failure of hamstring tendon autograft ACL reconstruction: 2-year outcomes from the STABILITY study randomized clinical trial. Am J Sports Med. 2020;48(2):285-297.
Medical disclaimer: the content on this page is provided for medical education only. It is not a substitute for consultation and clinical examination, and must not be used as a basis for self-diagnosis or self-treatment. Read the full medical disclaimer.