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What Is Lateral Suture Surgery in Dogs?

What Is Lateral Suture Surgery in Dogs?

Lateral Suture

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Lateral suture surgery is a common treatment for torn knee ligaments in dogs. Learn how it works, when it's used, and what recovery looks like

By 

Sustainable Vet Group

Updated on

August 4, 2025

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What Is Lateral Suture Surgery in Dogs?

Understanding Lateral Suture Surgery

Lateral suture surgery is a common method used to treat Cranial Cruciate Ligament (CCL) injuries in dogs. The CCL is like the ACL in humans and helps stabilize the knee. When it tears, dogs often limp or avoid putting weight on the leg. This surgery replaces the torn ligament with a strong suture placed outside the knee joint.

Unlike TPLO (Tibial Plateau Leveling Osteotomy) or TTA (Tibial Tuberosity Advancement), which involve cutting and reshaping the bone, lateral suture surgery is less invasive. It works by stabilizing the joint using a nylon line placed around the knee bones to mimic the ligament’s role.

This technique is also called extracapsular repair, ELSS (extracapsular lateral suture stabilization), or lateral suture stabilization. It’s most often used in small to medium dogs, though it can work for larger dogs in some cases.

How the Surgery Works

This surgery uses a simple but effective method to stabilize the dog’s knee after a torn CCL. The goal is to prevent abnormal movement in the joint while the body heals.

  • Step-by-step process:
    The surgeon first makes a small incision near the knee. Damaged tissue, like the torn ligament or any torn meniscus, is removed. A strong nylon suture is then looped around the small bone behind the femur called the fabella and passed through a hole drilled in the front of the tibia.

  • How it stabilizes the joint:
    The nylon line works like a replacement for the torn ligament. It stops the tibial thrust, which is the forward movement of the shin bone that happens when the dog puts weight on the leg. This helps the knee stay in place when walking or running.

  • Healing with scar tissue:
    Over time, the dog’s body builds scar tissue around the joint. This scar tissue gives extra support and helps hold the knee in place permanently. The synthetic suture is often left in place unless it causes problems later.

This method allows dogs to walk without pain while their knee heals and becomes stable again.

When Is Lateral Suture Surgery Recommended?

This surgery works best for certain dogs based on size, age, and activity level. It’s not ideal for all cases, so your vet will guide you.

  • Best candidates for this surgery:
    Lateral suture surgery is most often used in small to medium-sized dogs under 20–25 kg. It is also a good option for older large-breed dogs that are less active and not good candidates for bone-cutting surgeries like TPLO or TTA.

  • When it's not recommended:
    This surgery may not hold up well in young, large, or highly active dogs. In these cases, the forces on the joint can stretch or break the nylon line. These dogs may need a stronger, bone-based procedure instead.

  • Signs your dog might need it:
    Dogs with CCL injuries often limp, hold the leg up, or show pain in the knee after exercise. You may notice swelling or stiffness. During a physical exam, the vet may do a drawer test or tibial thrust test to feel for loose movement in the knee. A positive result suggests ligament damage.

If your dog fits the right profile, lateral suture surgery can offer a safe and reliable solution.

Diagnosis Before Surgery

Before deciding on lateral suture surgery, your vet needs to confirm the CCL injury and check for other joint problems.

  • Physical exam and movement tests:
    Your vet will start with a full physical exam and check your dog’s walking and standing posture. Two key tests are used: the cranial drawer test and the tibial thrust test. Both help check if the tibia moves forward abnormally, which is a clear sign of a torn ligament.

  • X-rays or advanced imaging:
    While X-rays don’t show the ligament itself, they are very helpful to rule out other issues, like bone fractures, arthritis, or joint infections. In some cases, advanced imaging like MRI or CT scans may be needed, especially if the diagnosis is unclear.

  • Looking for meniscus damage:
    The meniscus is a small piece of cartilage in the knee that often gets torn along with the CCL. Your vet may suspect this if there’s a clicking sound or pain when the joint is moved. In most cases, the surgeon checks and treats the meniscus during surgery.


Accurate diagnosis helps ensure the right treatment plan and better results after surgery.

Pros and Cons of Lateral Suture Surgery

Lateral suture surgery has both benefits and risks. Understanding them helps you choose the best option for your dog.

Pros of this surgery:

  • It’s a less invasive procedure than TPLO or TTA, with no bone cutting.
  • Surgery time is shorter, which means less anesthesia risk, especially for older dogs.
  • It is more affordable than advanced procedures, making it a good option for budget-conscious owners.
  • Recovery time is often quicker in small or older dogs with low activity needs.

Cons to consider:

  • This method may fail in large or very active dogs because the suture can stretch or snap under pressure.
  • There is a higher risk of arthritis over time, since the joint is not corrected from the inside.
  • In some cases, the suture loosens or breaks, which may cause the knee to become unstable again.
  • It relies on scar tissue for long-term stability, which forms differently in each dog.

This surgery can work well when used in the right situation, especially for smaller, calm dogs. But it’s important to weigh the risks, especially if your dog is young, large, or highly active.

How It Compares to TPLO and TTA

Lateral suture surgery takes a different approach than TPLO or TTA, and the best choice depends on your dog’s size, age, and lifestyle.

  • Key differences in technique:
    Lateral suture surgery uses a strong nylon line placed outside the knee joint. TPLO and TTA both involve cutting and changing the shape of the tibia to stop the joint from moving abnormally. These newer surgeries are more complex and require advanced equipment.

  • Recovery and cost comparison:
    Recovery after lateral suture is often shorter for small dogs and doesn’t need as much bone healing. It’s also more affordable than TPLO or TTA, which cost more due to surgical tools, implants, and specialist training.

  • When lateral suture is preferred:
    It’s best for small to medium dogs, or older dogs that aren’t very active. It’s also safer for pets with health risks that make longer surgery dangerous.

  • Why some clinics still use it:
    Many general practices offer lateral suture surgery because it works well, costs less, and doesn’t need special equipment. It’s a proven method that still gives good results when used in the right cases.

What to Expect After Surgery

After lateral suture surgery, your dog will need rest, pain control, and regular follow-ups to heal well and avoid problems.

  • Pain management and medications:
    Your vet will prescribe pain relievers and anti-inflammatory drugs to keep your dog comfortable. Some dogs may also need antibiotics if there’s a risk of infection. Always follow your vet’s dosage instructions closely.

  • Typical recovery timeline:
    Most dogs begin putting weight on the leg within a few days after surgery, but full recovery takes 8 to 12 weeks. Leash walks, crate rest, and restricted activity are important during the first month. Around week 6, short walks and gentle exercises can begin.

  • Signs of healing and warning signs:
    As healing continues, your dog should show less limping, more steady walking, and better use of the leg. If the incision looks clean and your dog is more active, these are good signs. Watch for swelling, bleeding, limping after rest, or licking at the wound, which can signal complications.

Recovery success depends on rest, home care, and follow-up vet visits, so stick to your rehab plan and call your vet if anything feels off.

At-Home Recovery Tips for Dog Owners

Your care at home plays a big role in how well your dog heals after lateral suture surgery. A calm and controlled environment helps prevent injury during recovery.

  • Set up a safe resting area:
    Use a crate or small room with soft bedding to limit movement. Keep the space quiet and free of slippery floors. Avoid letting your dog jump on furniture or run around the house.

  • Leash walks and stair safety:
    Only take your dog outside on a leash for short bathroom breaks. Avoid stairs as much as possible. If stairs are unavoidable, use a sling under the belly for support. Never let your dog roam freely until your vet says it’s safe.

  • Stick to all follow-up appointments:
    These visits let your vet check the incision, monitor healing, and update the rehab plan. Your vet may adjust medications, clear your dog for more activity, or spot early signs of complications.

Being consistent with rest, limited activity, and checkups can speed up healing and reduce the risk of problems. If you're unsure about anything, always ask your vet for guidance.

The Role of Rehabilitation in Healing

Rehabilitation is a key part of recovery after lateral suture surgery. It helps your dog regain strength, reduce stiffness, and return to normal movement safely.

  • Recommended therapies:
    Common rehab treatments include laser therapy to reduce pain and swelling, hydrotherapy (like underwater treadmill walking) to build muscle without joint stress, and massage therapy to ease tension and improve blood flow. These are often started a few weeks after surgery with your vet’s guidance.

  • How rehab helps your dog recover:
    Rehab exercises improve joint movement, balance, and leg strength. Without them, dogs may heal with a limp or develop long-term joint stiffness. Rehab also reduces the risk of overloading the other leg, which can be injured if the healing leg stays weak.

  • Expected recovery timeline:
    Most dogs take 8 to 12 weeks to fully recover, but the timeline varies. Small dogs may bounce back faster, while older or larger dogs may need longer. Your vet or rehab therapist will adjust the program as your dog improves.

A structured rehab plan makes healing smoother and helps your dog return to a pain-free, active life.

Can Lateral Suture Surgery Fail?

While lateral suture surgery is often successful, it can fail in some cases—especially if the dog is too active or the suture doesn’t hold.

  • What can cause failure:
    The most common reasons include suture breakage, loosening, or improper healing due to early activity. Large or high-energy dogs are at greater risk because of the strong force they place on the knee joint during movement.

  • Warning signs after surgery:
    Watch for signs like limping that gets worse, swelling around the knee, wound discharge, or reluctance to bear weight. If your dog seems in pain or walks unevenly weeks after surgery, contact your vet right away.

  • What to do if it fails:
    If the first surgery doesn’t work, your vet may suggest a revision surgery, switching to a stronger option like TPLO, or trying conservative care with rehab, rest, and medications.

Early action and proper aftercare can often prevent serious complications.

Advances That Improve Outcomes

Lateral suture surgery has evolved over the years. New materials and improved techniques have made the procedure more reliable, especially in dogs that would have been poor candidates in the past.

  • Modern suture materials and tools:
    Today’s surgeries often use monofilament nylon, which is stronger and less likely to stretch over time. Some surgeons also use bone anchors to secure the suture more firmly into the tibia. Knotless suture systems reduce the risk of irritation or loosening caused by bulky knots under the skin.

  • Better technique through biomechanics:
    Surgeons now have a better understanding of how a dog’s knee moves under pressure. This allows for better suture tensioning and placement, improving joint stability during movement.

  • Focus on isometry:
    Isometry means keeping the suture at the same tension throughout the knee’s range of motion. Placing the suture at precise points—where the distance between bones doesn’t change much—leads to smoother, more natural movement and less chance of failure.

These updates help improve comfort, stability, and long-term results, especially when paired with proper recovery and rehab.

Final Thoughts

Lateral suture surgery is a proven and effective option for treating CCL injuries in many dogs. It offers a simpler, less invasive approach with a lower cost and faster recovery for the right candidates.

This surgery works best in small to medium dogs or older, less active large dogs. Choosing the right patient and strictly following post-op care including crate rest, leash walks, and rehab greatly increases the chances of full recovery. While there are some risks, especially in larger or very active dogs, modern techniques and materials have improved the success rate.

Every dog is different, so it’s important to talk with your vet about your dog’s needs, age, size, and lifestyle. With expert advice and careful planning, you can choose the treatment that brings your dog the best chance of a pain-free, active life.

FAQs About Lateral Suture Surgery in Dogs

Is lateral suture surgery painful for dogs?

The surgery itself is not painful because your dog is under anesthesia. Afterward, your vet will prescribe pain medicine and anti-inflammatories to manage discomfort. Most dogs feel sore for a few days, but with rest and medication, they begin to feel better quickly. Pain levels are usually manageable and improve steadily during the first week.

How long does it take for dogs to walk after the procedure?

Most dogs start toe-touching or putting light weight on the leg within 3 to 5 days. By week two, many dogs begin short, controlled walks on a leash. Full walking and joint use typically return by 6 to 8 weeks. However, complete recovery, including muscle rebuilding, may take 12 weeks or longer with proper rest and rehab.

What’s the cost of lateral suture surgery?

Lateral suture surgery usually costs between ₹25,000 and ₹60,000 ($300–$800), depending on the vet clinic, region, and your dog’s needs. Additional costs may include X-rays, medications, and post-op checkups. It’s often less expensive than TPLO or TTA, making it a practical choice for small to medium dogs, especially when budget is a concern for pet owners.

Will my dog need physical therapy after this surgery?

Yes, physical therapy is highly recommended after lateral suture surgery. Rehab helps reduce stiffness, rebuild strength, and restore full use of the leg. Techniques like hydrotherapy, passive range-of-motion exercises, and laser treatment may be used. A proper rehab plan ensures smoother recovery, lowers arthritis risk, and reduces the chance of injuring the other leg later.

Can the surgery fail and need to be redone?

Lateral suture surgery can fail in some cases, especially in large or highly active dogs. The suture may stretch or break if your dog moves too much too soon. Failure may cause pain, limping, or joint instability. If that happens, your vet might recommend revision surgery, switch to TPLO, or use strict conservative management with rehab.

Is lateral suture surgery still used by most vets today?

Yes, lateral suture surgery is still widely used, especially in general practice clinics. It’s a simple, effective option for small or older dogs and doesn’t require advanced tools. While TPLO and TTA are more common in specialty hospitals, many vets choose lateral suture for its lower cost, shorter surgery time, and good results in the right patients.

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