Posterolateral Corner Reconstruction (PLC)
A surgical procedure to restore stability to the posterolateral corner of the knee
The PLC is a complex network of ligaments, tendons, and soft tissues that stabilise the knee and prevent excessive outward or rotational movement. Injuries to the PLC often occur due to trauma, such as car accidents or sports injuries, and are frequently associated with damage to other knee ligaments, such as the ACL or PCL.
Common Reasons for PLC Reconstruction Surgery
- Severe or complete PLC tears that have not healed with non-surgical treatments.
- Chronic instability or recurrent episodes of knee buckling or giving way.
- Combined injuries involving the ACL or PCL, requiring comprehensive ligament reconstruction.
- Pain or dysfunction caused by improper healing or untreated PLC injuries.
The goals of PLC reconstruction are to stabilise the knee, alleviate pain, and restore functional movement.
Preparation for Surgery
Comprehensive evaluation and careful planning are essential for successful PLC reconstruction. Dr Ben McGrath will perform a thorough assessment, including imaging studies such as X-rays, MRIs, or CT scans, to determine the extent of the injury and plan the surgical approach.
Key Steps in Preparation:
- Consultation: Dr McGrath will review your history, explain the procedure, discuss risks and benefits, and answer any questions.
- Pre-Surgical Instructions: Patients may need to fast before surgery and adjust medications, such as stopping blood thinners.
- Prehabilitation: Exercises to strengthen the muscles surrounding the knee may help optimise recovery.
Lifestyle Adjustments: Maintaining a healthy weight, ceasing smoking, and addressing other health factors may enhance surgical outcomes.
What Happens During the Surgery?
PLC reconstruction is typically performed under general anaesthesia and may involve a combination of open and minimally invasive techniques.
Surgical Steps:
- Incisions: Small incisions are made to access the damaged structures.
- Assessment and Preparation: The surgeon evaluates the extent of the injury and removes any scar tissue or damaged tissue.
- Graft Selection: Grafts, often harvested from the hamstring, quadriceps, or a donor source, are prepared to replace damaged ligaments and tendons.
- Tunnel Creation: Small tunnels are drilled into the femur and tibia to anchor the grafts securely.
- Graft Placement and Fixation: The grafts are positioned to replicate the natural anatomy of the PLC and secured with screws or fixation devices.
- Closure: The incisions are closed with sutures or adhesive strips, and the knee is bandaged for protection.
The procedure typically takes 2 to 3 hours, depending on the complexity of the injury and the number of structures involved.
Understanding the Risks
While PLC reconstruction is generally safe, it is important to understand the potential risks:
- Infection: At the incision sites or within the joint.
- Graft Failure: Rarely, the reconstructed structures may not provide the desired stability.
- Swelling and Stiffness: Temporary inflammation or reduced range of motion.
- Blood Clots: Rare but possible in the lower limbs.
- Nerve or Vessel Injury: Extremely rare but a potential risk during surgery.
Dr McGrath uses advanced surgical techniques and follows strict safety protocols to minimise these risks.
What to Expect After Surgery
Immediate Post-Operative Care:
- Pain Management: Discomfort and swelling can be managed with prescribed medications and regular icing.
- Assistive Devices: Crutches and a knee brace may be used to support and protect the knee during early recovery.
- Discharge Instructions: Detailed guidance on caring for the surgical site, activity restrictions, and follow-up appointments will be provided.
Rehabilitation and Recovery
Recovery from PLC reconstruction involves a structured rehabilitation program tailored to the patient’s needs:
Phase 1: Early Recovery (Weeks 0–6)
- Goals: Protect the reconstructed structures, reduce swelling, and restore range of motion.
- Activities: Partial weight-bearing with crutches, gentle range-of-motion exercises, and cryotherapy.
Phase 2: Strength and Stability (Weeks 6–12)
- Goals: Regain strength and stability in the knee.
- Activities: Physiotherapy for strengthening the quadriceps and hamstrings, balance exercises, and light cycling.
Phase 3: Advanced Recovery (Months 3–6)
- Goals: Restore full function and prepare for daily activities or sports.
- Activities: Progressive resistance training, functional drills, and agility exercises.
Long-Term Outcomes
PLC reconstruction may help restore knee stability, reduce pain, and prevent further damage to surrounding structures. Long-term success depends on:
- Adherence to rehabilitation protocols.
- Regular follow-up appointments to monitor progress.
- Maintaining a healthy lifestyle to support joint health.
Most patients experience significant improvements in knee stability and mobility, allowing them to return to their desired activities with confidence.