KNEE · ACL INJURY GUIDE

Torn your ACL? Surgery isn’t always the answer, but the wrong delay can cost your knee.

Every week I meet patients who were told two opposite things: “you must operate immediately” and “just do physiotherapy, it will heal.” Both can be wrong. This guide explains how the decision is actually made, the same framework I use in my clinic.

Dr. Prashant Parate · Fellowship-trained Arthroscopy & Sports Injury Surgeon · Jupiter Hospital (Baner) & Sainath Hospital (Moshi, PCMC) · Reviewed July 2026

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What the ACL does, and why a torn one doesn’t heal

The anterior cruciate ligament is the central stabiliser of your knee. It stops the shin bone from sliding forward and controls rotation, every time you pivot, cut, land from a jump, or change direction, the ACL is working.

A completely torn ACL does not heal back to its original strength. It has poor blood supply, and its torn ends retract inside the joint. This is why treatment is not about “waiting for it to join”, it is about deciding whether your knee, for your life, needs the ligament rebuilt.

Typical injury story: a twisting fall in football, kabaddi, badminton, cricket fielding, or a two-wheeler accident. Many patients hear a “pop”, the knee swells within hours, and later it feels unreliable, a sensation of the knee giving way on stairs, uneven ground, or sudden turns.

Do you actually need ACL surgery? The 5-question decision pathway

Work through these five questions. They are the same ones I ask in the OPD, your answers point toward reconstruction or structured physiotherapy.

The honest summary: young or active patients with instability, and anyone with a repairable meniscus tear, usually benefit from reconstruction. Older, low-demand patients with stable knees deserve a genuine trial of physiotherapy, not reflex surgery.

How ACL reconstruction works, and choosing your graft

ACL reconstruction is keyhole (arthroscopic) surgery. Through two small portals, the torn ligament is replaced with a graft, a tendon taken from your own body, anchored in bone tunnels positioned to reproduce your original anatomy. Most patients stay one night in hospital and walk with support the next day.

Graft	Strengths	Considerations	Often chosen for
Hamstring tendon	Small incision, less kneeling pain, reliable results	Mild early hamstring weakness	Most patients; those who kneel, squat, sit cross-legged
BPTB (patellar tendon)	Bone-to-bone healing, strong fixation	Kneeling discomfort in some patients	High-level pivoting athletes
Quadriceps tendon	Thick, robust graft; growing evidence base	Newer technique, surgeon-dependent	Revision cases, larger builds
Peroneus longus tendon	Consistently thick graft; spares the knee’s own muscles, so hamstring strength is preserved	Harvested from the ankle, mild, usually temporary effect on ankle strength; long-term data still growing	Thin hamstring tendons, revision surgery, athletes who depend on hamstring power
Allograft (donor tendon)	No donor-site pain, shorter surgery time	Slower graft incorporation, higher re-tear risk in young athletes, cost and limited tissue-bank availability in India	Revision and multi-ligament reconstruction, older patients
Synthetic ligament (e.g., LARS)	No graft harvest, immediate strength	Long-term failure and inflammation concerns; not a first choice for primary ACL in young patients	Select, uncommon situations only

There is no universally “best” graft, the right choice depends on your sport, occupation, kneeling and floor-sitting requirements, and anatomy. We decide it together during consultation.

The realistic ACL recovery timeline

Surgery is one day. Recovery is a nine-to-twelve-month project, and rehabilitation quality decides your result as much as surgical technique does.

Stage	What happens
Week 0–2	Walk with support from day one. Pain control, swelling management, quadriceps activation, achieving full knee straightening.
Week 2–6	Back to desk work by week 2–3. Progressive bending, stationary cycling, wean off crutches as strength allows.
Week 6–12	Driving by week 6–8. Gym-based strengthening, balance work. Full bend regained, cross-legged sitting and squatting return around month 3–4, because your natural joint is preserved.
Month 3–6	Jogging begins around month 3–4 once strength criteria are met. Sport-specific drills introduced gradually.
Month 6–9	Agility, cutting and jumping training. Strength testing comparing the operated leg with the healthy side.
Month 9–12	Return to competitive sport, after passing return-to-sport testing, not just a calendar date. Returning early is the single biggest re-tear risk.

What ACL surgery costs in Pune, and what insurance covers

In Pune, ACL reconstruction typically ranges between ₹1.5 and ₹3.5 lakh, depending on the hospital category, implants and graft fixation devices used, room type, and whether additional procedures (such as meniscus repair) are needed in the same sitting.

Most health insurance policies cover ACL reconstruction, including cashless treatment at empanelled hospitals. Two practical points patients often miss: inform your insurer that the injury is traumatic (accident-related claims are processed differently from degenerative conditions), and get pre-authorisation initiated a few days before a planned surgery date.

Figures are indicative ranges, not quotations. An exact estimate is given after clinical assessment and MRI review, and the hospital’s insurance desk assists with cashless approval.

ACL surgery, frequently asked questions

Can an ACL tear heal without surgery?

A complete tear does not heal to original strength, the ligament has poor blood supply. But “no healing” does not automatically mean “needs surgery.” Low-demand patients with stable knees, and some partial tears, do well with structured physiotherapy. The decision pathway above explains how we separate the two groups.

What happens if I delay surgery in an unstable knee?

Each giving-way episode risks tearing the meniscus and damaging cartilage. Delaying reconstruction in unstable knees is associated with significantly higher rates of meniscus injury, raising the long-term risk of early arthritis. Instability, not the calendar, is the warning sign.

Can I sit cross-legged and squat after ACL reconstruction?

Yes. Unlike knee replacement, ACL reconstruction preserves your natural joint. Once full bend is regained in rehabilitation, usually by month 3–4, cross-legged sitting, squatting, and using an Indian toilet are comfortable for most patients.

How painful is the surgery, and how long in hospital?

ACL reconstruction is keyhole surgery done under spinal or general anaesthesia. Most patients stay one night, walk with a brace and support the next morning, and manage pain well with routine medication for the first week or two.

Will I need a second surgery to remove implants?

No. The buttons and screws used for graft fixation are designed to stay permanently and almost never need removal. They do not set off airport metal detectors in most cases and do not interfere with MRI scans.

What is the re-tear risk?

Overall re-tear rates are low, but the risk concentrates in young athletes who return to pivoting sport early. This is exactly why we insist on return-to-sport testing at 9–12 months rather than a fixed date, passing strength and hop tests, not impatience, decides the return.

Is robotic surgery used for ACL reconstruction?

Robotics currently applies to joint replacement, not ACL reconstruction. ACL surgery is arthroscopic, precision comes from anatomic tunnel placement under direct camera vision, which is a matter of surgical training and technique.

This page is patient education, not a substitute for consultation. Treatment decisions require clinical examination and imaging review. Last medically reviewed: July 2026 by Dr. Prashant Parate, DNB Orthopaedics, Fellowship in Arthroscopy & Sports Medicine (Thammasat University Hospital, Thailand).