PCL Tear

What is a PCL tear?

The posterior cruciate ligament (PCL) is one of the major stabilising ligaments inside the knee. It prevents excessive backward movement of the shinbone (tibia) relative to the thighbone (femur).

PCL injuries commonly occur after a force pushes the shinbone backwards, such as a dashboard injury in a vehicle accident, a fall onto a bent knee or certain sports injuries.

What are the symptoms of PCL tear?

Symptoms may include:

• Knee pain and swelling

• Difficulty walking

• Reduced knee movement

• A feeling of instability

• Difficulty with stairs or activities requiring strength

Some PCL injuries are less obvious initially than ACL injuries, and symptoms may persist as a feeling of weakness or instability.

How is a PCL tear diagnosed?

Clinical examination is central. X-rays may identify associated fractures or changes in alignment, while MRI can assess the PCL and associated meniscus, cartilage and ligament injuries.

What are the treatment options?

Treatment depends on whether the injury is isolated or associated with other ligament injuries.

Some isolated PCL injuries can be successfully managed with rehabilitation, particularly when instability is limited. Bracing and physiotherapy may be used to restore strength and knee control.

Surgery may be considered for selected patients with significant persistent instability, certain types of PCL injury or multiple ligament injuries.

What happens if surgery is not done?

Many isolated PCL injuries can be treated without surgery. However, persistent instability or altered knee mechanics may cause difficulty with demanding activities and may contribute to longer-term joint problems in some patients.

What type of surgery is recommended for a PCL tear?

The type of surgery depends on the type and location of the injury. PCL reconstruction may be recommended when the PCL is significantly torn and the knee remains unstable despite appropriate treatment. In some cases, the PCL may pull away from its attachment along with a small piece of bone. In such injuries, PCL avulsion fixation may be possible to restore the PCL to its original attachment.

When can I return to normal activity?

Recovery after PCL reconstruction is gradual and depends on the extent of the injury, the surgical procedure and progress with rehabilitation. As a general guide, patients should plan for several weeks before returning to regular work. Desk-based work may be possible earlier, while jobs involving prolonged standing, walking, squatting, climbing or heavy physical activity may require around 8–12 weeks or longer. Most patients gradually return to normal daily activities over the first 2–3 months, although strength and confidence continue to improve for several months.

If the PCL injury is part of a multiple-ligament knee injury, recovery is usually substantially longer and the timeline should be discussed individually.

When can I return to sports?

Return to sports takes considerably longer than returning to everyday activities. After isolated PCL reconstruction, running and progressive sport-specific training are generally introduced only after several months of rehabilitation, once adequate movement, strength and knee stability have been achieved. As a general guide, return to unrestricted sports is usually not considered before 6–9 months and may take around 9–12 months, particularly for sports involving running, jumping, pivoting or contact.

Return to sport should be based on knee stability, strength, movement control and sport-specific functional testing rather than time alone.

When should I see an orthopaedic surgeon?

If you have sustained a significant knee injury and a PCL tear is suspected or diagnosed, an orthopaedic assessment is recommended. This is particularly important if you have persistent pain or swelling, difficulty walking, a feeling of instability, or difficulty bending or straightening the knee. Assessment is also important when the PCL injury occurs together with other ligament or meniscal injuries, as combined injuries may require a different treatment approach.

Even when surgery is not immediately required, early specialist assessment can help determine the severity of the injury, identify associated damage and establish an appropriate rehabilitation plan.