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Multi-Ligament Surgery

Injured more than one ligament in your knee? Discover the options, procedure and recovery for multi-ligament knee surgery.

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Overview

Multi-ligament knee injuries occur when two or more of the knee's stabilising ligaments — the ACL, PCL, MCL, or LCL — are damaged simultaneously, usually following high-energy trauma such as a road traffic accident, a fall from height, or a significant sporting injury. Because the knee relies on this network of ligaments for stability in multiple directions, these injuries can be complex to assess and treat, and management is always tailored to the specific combination and severity of ligaments involved.

Not every ligament injury requires surgery. Where the knee remains reasonably stable — typically with lower-grade partial tears, particularly involving the MCL and PCL — a structured course of bracing and physiotherapy is often the preferred first step. This allows the ligament to heal naturally while restoring strength, control, and range of motion around the joint. Conservative management is generally most successful when instability is mild and the knee doesn't give way during everyday activity.

Surgery becomes the recommended path when the instability is significant and persists despite physiotherapy, when higher-grade or combined ligament injuries are present, or when the level of instability puts the patient at risk of further damage to the joint, including the cartilage and meniscus.

The Procedure

PCL reconstruction

The posterior cruciate ligament is typically more robust than the ACL, and isolated injuries can sometimes be managed conservatively. However, where the PCL is significantly torn — particularly alongside other ligament damage — reconstruction using a tendon graft is often needed to restore stability and protect the knee from long-term joint damage.

The procedure is performed arthroscopically, using keyhole techniques to minimise trauma to the surrounding tissue. The damaged ligament is replaced with a new graft, typically a donor (allograft) tendon. Tunnels are precisely drilled through the tibia and femur to recreate the ligament's natural anatomical position, and the graft is then threaded through and secured with fixation devices at each end, restoring the ligament's role in preventing the shin bone from sliding backwards beneath the thigh bone. Where multiple ligaments are involved, PCL reconstruction is often performed alongside repair or reconstruction of the other damaged structures in a single, staged procedure to restore overall knee stability.

MCL reconstruction

The medial collateral ligament has a good natural capacity to heal, so most isolated injuries are treated conservatively. Reconstruction is generally reserved for severe, complete tears, or where the MCL is injured as part of a wider multi-ligament pattern and ongoing instability is expected without surgical support.

When surgery is required, the aim is to restore the ligament that prevents the knee from opening up on its inner side. Depending on the nature and location of the tear, this may involve repairing the ligament back to its original attachment point, or reconstructing it entirely using a tendon graft — typically taken from a donor tendon where appropriate. The graft is anchored into the femur and tibia at the ligament's natural attachment points, recreating its original alignment and tension to restore stability. Where the MCL is injured alongside other ligaments, reconstruction is often carried out as part of a combined procedure, allowing the whole knee to be stabilised in a single, coordinated operation.

LCL repair / reconstruction

The lateral collateral ligament and posterolateral corner injuries usually result in significant instability, meaning surgery is more frequently required. Repair or reconstruction is typically recommended for complete tears, particularly where instability is present or other ligaments are also involved.

The approach taken depends on the nature and timing of the injury. Where surgery is performed early and the ligament tissue quality allows, a direct repair — reattaching the ligament to its original bony attachment points using suture anchors — may be possible. In cases of chronic injury, more extensive damage, or where the tissue is no longer suitable for repair, reconstruction is preferred, using a tendon graft to recreate the ligament and restore the knee's resistance to opening up on its outer side. Because the posterolateral corner involves several interconnected structures working together to control rotational stability, reconstruction often addresses this complex as a whole, rather than the LCL in isolation. Where other ligaments are also damaged, LCL repair or reconstruction is typically carried out as part of a combined procedure to restore overall knee stability in a single operation.

Given the complexity of these injuries, treatment decisions are made following a thorough clinical assessment, MRI imaging, and careful consideration of the specific ligaments affected, the degree of instability, and the patient's individual goals — whether that's returning to competitive sport or simply restoring a stable, functional knee for everyday life. In many cases, combined or staged surgery is required to reconstruct multiple ligaments and restore full knee stability.

Outcomes

  • 20+ years of experience
  • 5000+ operations
  • <1% complication rate

Healing Begins Here

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<1%

Complications rate

5000+

Operations

20+

Years of Experience

Frequently asked questions

Surgery duration depends on how many ligaments require reconstruction and the complexity of the injury. Because this involves rebuilding several structures — sometimes alongside meniscal repair — operating times typically range from 2 to 3 hours. In some cases, surgery may be staged across two operations rather than performed all at once, depending on the pattern of injury.

The goal of multi-ligament reconstruction is to restore overall stability to the knee, protect it from further damage, and give you the best chance of returning to daily activities — and, where appropriate, sport — with a knee that feels secure and functions well. Because multiple structures are involved, successful reconstruction is particularly important in preventing long-term instability and secondary damage to the joint’s cartilage and menisci.

Multi-ligament injuries are more complex than isolated ligament tears, and the surgery carries a correspondingly higher level of risk than single-ligament reconstruction. Potential risks include:

  • Infection
  • Bleeding
  • Pain
  • Stiffness (including a higher risk of knee stiffness, or arthrofibrosis, given the extent of surgery)
  • Damage to blood vessels and nerves — this is a particular consideration in multi-ligament injuries, given the proximity of major vessels and nerves behind the knee
  • Re-rupture or failure of one or more of the reconstructed ligaments
  • Residual instability requiring further surgery

Mr Barkatali will discuss how these risks apply to your specific injury pattern and planned reconstruction.

Once reconstructed, your ligaments will feel more stable — but each graft is still going through an important healing process. The tendon tissue used to rebuild each ligament gradually transforms into ligament-like tissue, in a process called ligamentisation. Most of this transformation happens between 6 weeks and 6 months after surgery, though full maturation continues for up to 12–24 months.

This means your grafts are at their weakest between 6 weeks and 6 months, so it’s especially important to protect the knee from re-injury during this window — with multiple reconstructed structures, the margin for error is smaller than after a single-ligament repair. Closed-chain exercises and close monitoring by your physiotherapist are essential throughout this period. Your physio and Mr Barkatali will guide you closely on when it’s safe to progress to running, cutting, and pivoting activities.

You’ll have clips or stitches applied to the incisions made around the knee. Given the more extensive nature of multi-ligament surgery, there may be more than one incision site. These are typically removed around 2 weeks after surgery, either by the nurses or at the hospital. You’ll then see Mr Barkatali for your first post-operative review at 6 weeks post surgery.

This takes longer than after an isolated ACL reconstruction, given the greater number of structures being protected during early recovery. You’ll generally need to be out of your brace, walking comfortably without crutches, and able to perform an emergency stop safely before returning to driving — for most patients, this is significantly later than with single-ligament surgery, and Mr Barkatali will confirm when it’s appropriate based on your individual recovery.

Flying is usually fine from around 6 weeks after surgery, provided you're otherwise fit and take sensible precautions.

Thorough pre-operative assessment is particularly important given the complexity of these injuries. This typically includes detailed imaging (MRI, and sometimes additional scans to assess nerve and blood vessel involvement), a pre-operative fitness assessment, and routine blood tests. Prehabilitation — physiotherapy to optimise strength and movement ahead of surgery — is strongly recommended where possible, as it can support a smoother recovery from what is a more demanding operation.

Multi-ligament surgery usually requires an overnight stay, and sometimes longer, to allow for adequate pain control, monitoring, and early physiotherapy input before you go home. Mr Barkatali will advise on the expected length of stay based on your specific procedure.

Rehabilitation after multi-ligament surgery is more involved and more closely supervised than after an isolated ACL reconstruction, given the number of structures healing simultaneously. It follows a carefully staged programme — starting with protected movement and bracing, progressing through strengthening and balance work, and eventually building towards more dynamic activity. Your physiotherapist will work closely with you and Mr Barkatali throughout, as the pace of rehabilitation must respect the healing of every reconstructed structure, not just the fastest-healing one.

Return to sport after multi-ligament reconstruction takes longer than after isolated ACL surgery, given the number of structures that need to heal and the higher stakes of re-injury. As a general guide, low-impact activity such as swimming and cycling may begin from around 3–4 months, running from around 4–6 months, and a return to pivoting or contact sports is typically not considered until 14 months or beyond, once strength, control, and confidence in the knee have been fully assessed.

Yes — a brace is typically required after multi-ligament surgery, often for a longer period than after isolated ligament reconstruction, to protect the multiple healing structures. The type of brace and duration will depend on which ligaments were reconstructed and whether any additional repairs (such as meniscal repair) were carried out. Mr Barkatali will advise on your specific bracing protocol.

Some pain, swelling, and stiffness are normal given the extensive nature of the procedure. This is managed with pain relief medication, ice, and elevation, and steadily improves as your rehabilitation progresses.

Outcomes for multi-ligament reconstruction are generally good, particularly when the injury is well planned for and rehabilitation is followed closely, though results can be more variable than after isolated ligament surgery given the complexity of these injuries. Most patients regain good stability and function in the knee, though a full return to high-level pivoting sport is not achieved by every patient. Mr Barkatali will give you a realistic, individualised sense of expected outcomes based on your specific injury pattern.

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